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charset="utf-8" Refactors the clock handling logic in the imx6 PCI driver by adding clk_names[] define in drvdata . Simplifies the code and makes it more maintainable, as future additions of SOC support will only require straightforward changes. Signed-off-by: Frank Li --- Notes: Change from v3 to v4 - using clk_bulk_*() API Change from v1 to v3 - none drivers/pci/controller/dwc/pci-imx6.c | 128 ++++++++------------------ 1 file changed, 38 insertions(+), 90 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller= /dwc/pci-imx6.c index 74703362aeec7..2086214345e9a 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -61,12 +61,15 @@ enum imx6_pcie_variants { #define IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE BIT(1) #define IMX6_PCIE_FLAG_SUPPORTS_SUSPEND BIT(2) =20 +#define IMX6_PCIE_MAX_CLKS 6 + struct imx6_pcie_drvdata { enum imx6_pcie_variants variant; enum dw_pcie_device_mode mode; u32 flags; int dbi_length; const char *gpr; + const char *clk_names[IMX6_PCIE_MAX_CLKS]; }; =20 struct imx6_pcie { @@ -74,11 +77,8 @@ struct imx6_pcie { int reset_gpio; bool gpio_active_high; bool link_is_up; - struct clk *pcie_bus; - struct clk *pcie_phy; - struct clk *pcie_inbound_axi; - struct clk *pcie; - struct clk *pcie_aux; + struct clk_bulk_data clks[IMX6_PCIE_MAX_CLKS]; + u32 clks_cnt; struct regmap *iomuxc_gpr; u16 msi_ctrl; u32 controller_id; @@ -407,13 +407,18 @@ static void imx7d_pcie_wait_for_phy_pll_lock(struct i= mx6_pcie *imx6_pcie) =20 static int imx6_setup_phy_mpll(struct imx6_pcie *imx6_pcie) { - unsigned long phy_rate =3D clk_get_rate(imx6_pcie->pcie_phy); + unsigned long phy_rate =3D 0; int mult, div; u16 val; + int i; =20 if (!(imx6_pcie->drvdata->flags & IMX6_PCIE_FLAG_IMX6_PHY)) return 0; =20 + for (i =3D 0; i < imx6_pcie->clks_cnt; i++) + if (strncmp(imx6_pcie->clks[i].id, "pcie_phy", 8) =3D=3D 0) + phy_rate =3D clk_get_rate(imx6_pcie->clks[i].clk); + switch (phy_rate) { case 125000000: /* @@ -550,19 +555,11 @@ static int imx6_pcie_attach_pd(struct device *dev) =20 static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) { - struct dw_pcie *pci =3D imx6_pcie->pci; - struct device *dev =3D pci->dev; unsigned int offset; int ret =3D 0; =20 switch (imx6_pcie->drvdata->variant) { case IMX6SX: - ret =3D clk_prepare_enable(imx6_pcie->pcie_inbound_axi); - if (ret) { - dev_err(dev, "unable to enable pcie_axi clock\n"); - break; - } - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX6SX_GPR12_PCIE_TEST_POWERDOWN, 0); break; @@ -589,12 +586,6 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *= imx6_pcie) case IMX8MQ_EP: case IMX8MP: case IMX8MP_EP: - ret =3D clk_prepare_enable(imx6_pcie->pcie_aux); - if (ret) { - dev_err(dev, "unable to enable pcie_aux clock\n"); - break; - } - offset =3D imx6_pcie_grp_offset(imx6_pcie); /* * Set the over ride low and enabled @@ -615,9 +606,6 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *i= mx6_pcie) static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie) { switch (imx6_pcie->drvdata->variant) { - case IMX6SX: - clk_disable_unprepare(imx6_pcie->pcie_inbound_axi); - break; case IMX6QP: case IMX6Q: regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, @@ -631,14 +619,6 @@ static void imx6_pcie_disable_ref_clk(struct imx6_pcie= *imx6_pcie) IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, IMX7D_GPR12_PCIE_PHY_REFCLK_SEL); break; - case IMX8MM: - case IMX8MM_EP: - case IMX8MQ: - case IMX8MQ_EP: - case IMX8MP: - case IMX8MP_EP: - clk_disable_unprepare(imx6_pcie->pcie_aux); - break; default: break; } @@ -650,23 +630,9 @@ static int imx6_pcie_clk_enable(struct imx6_pcie *imx6= _pcie) struct device *dev =3D pci->dev; int ret; =20 - ret =3D clk_prepare_enable(imx6_pcie->pcie_phy); - if (ret) { - dev_err(dev, "unable to enable pcie_phy clock\n"); + ret =3D clk_bulk_prepare_enable(imx6_pcie->clks_cnt, imx6_pcie->clks); + if (ret) return ret; - } - - ret =3D clk_prepare_enable(imx6_pcie->pcie_bus); - if (ret) { - dev_err(dev, "unable to enable pcie_bus clock\n"); - goto err_pcie_bus; - } - - ret =3D clk_prepare_enable(imx6_pcie->pcie); - if (ret) { - dev_err(dev, "unable to enable pcie clock\n"); - goto err_pcie; - } =20 ret =3D imx6_pcie_enable_ref_clk(imx6_pcie); if (ret) { @@ -679,11 +645,7 @@ static int imx6_pcie_clk_enable(struct imx6_pcie *imx6= _pcie) return 0; =20 err_ref_clk: - clk_disable_unprepare(imx6_pcie->pcie); -err_pcie: - clk_disable_unprepare(imx6_pcie->pcie_bus); -err_pcie_bus: - clk_disable_unprepare(imx6_pcie->pcie_phy); + clk_bulk_disable_unprepare(imx6_pcie->clks_cnt, imx6_pcie->clks); =20 return ret; } @@ -691,9 +653,7 @@ static int imx6_pcie_clk_enable(struct imx6_pcie *imx6_= pcie) static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie) { imx6_pcie_disable_ref_clk(imx6_pcie); - clk_disable_unprepare(imx6_pcie->pcie); - clk_disable_unprepare(imx6_pcie->pcie_bus); - clk_disable_unprepare(imx6_pcie->pcie_phy); + clk_bulk_disable_unprepare(imx6_pcie->clks_cnt, imx6_pcie->clks); } =20 static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) @@ -1305,32 +1265,19 @@ static int imx6_pcie_probe(struct platform_device *= pdev) return imx6_pcie->reset_gpio; } =20 - /* Fetch clocks */ - imx6_pcie->pcie_bus =3D devm_clk_get(dev, "pcie_bus"); - if (IS_ERR(imx6_pcie->pcie_bus)) - return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_bus), - "pcie_bus clock source missing or invalid\n"); + while (imx6_pcie->drvdata->clk_names[imx6_pcie->clks_cnt]) { + int i =3D imx6_pcie->clks_cnt; =20 - imx6_pcie->pcie =3D devm_clk_get(dev, "pcie"); - if (IS_ERR(imx6_pcie->pcie)) - return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie), - "pcie clock source missing or invalid\n"); + imx6_pcie->clks[i].id =3D imx6_pcie->drvdata->clk_names[i]; + imx6_pcie->clks_cnt++; + } + + /* Fetch clocks */ + ret =3D devm_clk_bulk_get(dev, imx6_pcie->clks_cnt, imx6_pcie->clks); + if (ret) + return ret; =20 switch (imx6_pcie->drvdata->variant) { - case IMX6SX: - imx6_pcie->pcie_inbound_axi =3D devm_clk_get(dev, - "pcie_inbound_axi"); - if (IS_ERR(imx6_pcie->pcie_inbound_axi)) - return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_inbound_axi), - "pcie_inbound_axi clock missing or invalid\n"); - break; - case IMX8MQ: - case IMX8MQ_EP: - imx6_pcie->pcie_aux =3D devm_clk_get(dev, "pcie_aux"); - if (IS_ERR(imx6_pcie->pcie_aux)) - return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_aux), - "pcie_aux clock source missing or invalid\n"); - fallthrough; case IMX7D: if (dbi_base->start =3D=3D IMX8MQ_PCIE2_BASE_ADDR) imx6_pcie->controller_id =3D 1; @@ -1353,10 +1300,6 @@ static int imx6_pcie_probe(struct platform_device *p= dev) case IMX8MM_EP: case IMX8MP: case IMX8MP_EP: - imx6_pcie->pcie_aux =3D devm_clk_get(dev, "pcie_aux"); - if (IS_ERR(imx6_pcie->pcie_aux)) - return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_aux), - "pcie_aux clock source missing or invalid\n"); imx6_pcie->apps_reset =3D devm_reset_control_get_exclusive(dev, "apps"); if (IS_ERR(imx6_pcie->apps_reset)) @@ -1372,14 +1315,6 @@ static int imx6_pcie_probe(struct platform_device *p= dev) default: break; } - /* Don't fetch the pcie_phy clock, if it has abstract PHY driver */ - if (imx6_pcie->phy =3D=3D NULL) { - imx6_pcie->pcie_phy =3D devm_clk_get(dev, "pcie_phy"); - if (IS_ERR(imx6_pcie->pcie_phy)) - return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_phy), - "pcie_phy clock source missing or invalid\n"); - } - =20 /* Grab turnoff reset */ imx6_pcie->turnoff_reset =3D devm_reset_control_get_optional_exclusive(de= v, "turnoff"); @@ -1470,6 +1405,9 @@ static void imx6_pcie_shutdown(struct platform_device= *pdev) imx6_pcie_assert_core_reset(imx6_pcie); } =20 +#define IMX6_CLKS_COMMON "pcie_bus", "pcie" +#define IMX6_CLKS_NO_PHYDRV IMX6_CLKS_COMMON, "pcie_phy" + static const struct imx6_pcie_drvdata drvdata[] =3D { [IMX6Q] =3D { .variant =3D IMX6Q, @@ -1477,6 +1415,7 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE, .dbi_length =3D 0x200, .gpr =3D "fsl,imx6q-iomuxc-gpr", + .clk_names =3D {IMX6_CLKS_NO_PHYDRV}, }, [IMX6SX] =3D { .variant =3D IMX6SX, @@ -1484,6 +1423,7 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE | IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, .gpr =3D "fsl,imx6q-iomuxc-gpr", + .clk_names =3D {IMX6_CLKS_NO_PHYDRV, "pcie_inbound_axi"}, }, [IMX6QP] =3D { .variant =3D IMX6QP, @@ -1492,40 +1432,48 @@ static const struct imx6_pcie_drvdata drvdata[] =3D= { IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, .dbi_length =3D 0x200, .gpr =3D "fsl,imx6q-iomuxc-gpr", + .clk_names =3D {IMX6_CLKS_NO_PHYDRV}, }, [IMX7D] =3D { .variant =3D IMX7D, .flags =3D IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, .gpr =3D "fsl,imx7d-iomuxc-gpr", + .clk_names =3D {IMX6_CLKS_NO_PHYDRV}, }, [IMX8MQ] =3D { .variant =3D IMX8MQ, .gpr =3D "fsl,imx8mq-iomuxc-gpr", + .clk_names =3D {IMX6_CLKS_NO_PHYDRV, "pcie_aux"}, }, [IMX8MM] =3D { .variant =3D IMX8MM, .flags =3D IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, .gpr =3D "fsl,imx8mm-iomuxc-gpr", + .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, }, [IMX8MP] =3D { .variant =3D IMX8MP, .flags =3D IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, .gpr =3D "fsl,imx8mp-iomuxc-gpr", + .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, }, [IMX8MQ_EP] =3D { .variant =3D IMX8MQ_EP, .mode =3D DW_PCIE_EP_TYPE, .gpr =3D "fsl,imx8mq-iomuxc-gpr", + .clk_names =3D {IMX6_CLKS_NO_PHYDRV, "pcie_aux"}, }, [IMX8MM_EP] =3D { .variant =3D IMX8MM_EP, .mode =3D DW_PCIE_EP_TYPE, .gpr =3D "fsl,imx8mm-iomuxc-gpr", + .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, }, [IMX8MP_EP] =3D { .variant =3D IMX8MP_EP, .mode =3D DW_PCIE_EP_TYPE, .gpr =3D "fsl,imx8mp-iomuxc-gpr", + .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, }, }; 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b=g/ade2iCpOFtMD7tSdwk4YsyTZJZGmRPokke0B2+Tqh1akIbJxNdo03doAjyqYhEV5uQSM8omMaNsyCbo0WEcXEWLIyh+cD91Jc1W53aiXvY8RfaU5lBSOGStkrs88YwXjxvtcaUTXOuN5PFzCJxRW5kQtLPs7yyCVs3vOoHB9A= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from AM6PR04MB4838.eurprd04.prod.outlook.com (2603:10a6:20b:4::16) by PAXPR04MB8174.eurprd04.prod.outlook.com (2603:10a6:102:1c4::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7091.36; Sun, 17 Dec 2023 05:12:45 +0000 Received: from AM6PR04MB4838.eurprd04.prod.outlook.com ([fe80::95f5:5118:258f:ee40]) by AM6PR04MB4838.eurprd04.prod.outlook.com ([fe80::95f5:5118:258f:ee40%7]) with mapi id 15.20.7091.034; Sun, 17 Dec 2023 05:12:45 +0000 From: Frank Li To: krzysztof.kozlowski@linaro.org Cc: Frank.li@nxp.com, bhelgaas@google.com, conor+dt@kernel.org, devicetree@vger.kernel.org, festevam@gmail.com, helgaas@kernel.org, hongxing.zhu@nxp.com, imx@lists.linux.dev, kernel@pengutronix.de, krzysztof.kozlowski+dt@linaro.org, kw@linux.com, l.stach@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, lpieralisi@kernel.org, manivannan.sadhasivam@linaro.org, robh@kernel.org, s.hauer@pengutronix.de, shawnguo@kernel.org Subject: [PATCH v4 02/15] PCI: imx6: Simplify phy handling by using by using IMX6_PCIE_FLAG_HAS_PHY Date: Sun, 17 Dec 2023 00:11:57 -0500 Message-Id: <20231217051210.754832-3-Frank.Li@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231217051210.754832-1-Frank.Li@nxp.com> References: <20231217051210.754832-1-Frank.Li@nxp.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: BYAPR04CA0007.namprd04.prod.outlook.com (2603:10b6:a03:40::20) To AM6PR04MB4838.eurprd04.prod.outlook.com (2603:10a6:20b:4::16) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM6PR04MB4838:EE_|PAXPR04MB8174:EE_ X-MS-Office365-Filtering-Correlation-Id: d75b788b-a14b-47e4-1db0-08dbfebece06 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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charset="utf-8" Refactors the phy handling logic in the imx6 PCI driver by adding IMX6_PCIE_FLAG_HAS_PHY bitmask define for drvdata::flags. The drvdata::flags and a bitmask ensures a cleaner and more scalable switch-case structure for handling phy. Signed-off-by: Frank Li --- Notes: Change from v1 to v3: - none drivers/pci/controller/dwc/pci-imx6.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller= /dwc/pci-imx6.c index 2086214345e9a..91ba26a4b4c3d 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -60,6 +60,9 @@ enum imx6_pcie_variants { #define IMX6_PCIE_FLAG_IMX6_PHY BIT(0) #define IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE BIT(1) #define IMX6_PCIE_FLAG_SUPPORTS_SUSPEND BIT(2) +#define IMX6_PCIE_FLAG_HAS_PHY BIT(3) + +#define imx6_check_flag(pci, val) (pci->drvdata->flags & val) =20 #define IMX6_PCIE_MAX_CLKS 6 =20 @@ -1277,6 +1280,13 @@ static int imx6_pcie_probe(struct platform_device *p= dev) if (ret) return ret; =20 + if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_PHY)) { + imx6_pcie->phy =3D devm_phy_get(dev, "pcie-phy"); + if (IS_ERR(imx6_pcie->phy)) + return dev_err_probe(dev, PTR_ERR(imx6_pcie->phy), + "failed to get pcie phy\n"); + } + switch (imx6_pcie->drvdata->variant) { case IMX7D: if (dbi_base->start =3D=3D IMX8MQ_PCIE2_BASE_ADDR) @@ -1306,11 +1316,6 @@ static int imx6_pcie_probe(struct platform_device *p= dev) return dev_err_probe(dev, PTR_ERR(imx6_pcie->apps_reset), "failed to get pcie apps reset control\n"); =20 - imx6_pcie->phy =3D devm_phy_get(dev, "pcie-phy"); - if (IS_ERR(imx6_pcie->phy)) - return dev_err_probe(dev, PTR_ERR(imx6_pcie->phy), - "failed to get pcie phy\n"); - break; default: break; @@ -1447,13 +1452,15 @@ static const struct imx6_pcie_drvdata drvdata[] =3D= { }, [IMX8MM] =3D { .variant =3D IMX8MM, - .flags =3D IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, + .flags =3D IMX6_PCIE_FLAG_SUPPORTS_SUSPEND | + IMX6_PCIE_FLAG_HAS_PHY, .gpr =3D "fsl,imx8mm-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, }, [IMX8MP] =3D { .variant =3D IMX8MP, - .flags =3D IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, + .flags =3D IMX6_PCIE_FLAG_SUPPORTS_SUSPEND | + IMX6_PCIE_FLAG_HAS_PHY, .gpr =3D "fsl,imx8mp-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, }, @@ -1465,12 +1472,14 @@ static const struct imx6_pcie_drvdata drvdata[] =3D= { }, [IMX8MM_EP] =3D { .variant =3D IMX8MM_EP, + .flags =3D IMX6_PCIE_FLAG_HAS_PHY, .mode =3D DW_PCIE_EP_TYPE, .gpr =3D "fsl,imx8mm-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, }, [IMX8MP_EP] =3D { .variant =3D IMX8MP_EP, + .flags =3D IMX6_PCIE_FLAG_HAS_PHY, .mode =3D DW_PCIE_EP_TYPE, .gpr =3D "fsl,imx8mp-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, --=20 2.34.1 From nobody Fri Dec 19 08:04:02 2025 Received: from EUR02-AM0-obe.outbound.protection.outlook.com (mail-am0eur02on2075.outbound.protection.outlook.com [40.107.247.75]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 72F0517EB; 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Received: from AM6PR04MB4838.eurprd04.prod.outlook.com (2603:10a6:20b:4::16) by PAXPR04MB8174.eurprd04.prod.outlook.com (2603:10a6:102:1c4::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7091.36; Sun, 17 Dec 2023 05:12:50 +0000 Received: from AM6PR04MB4838.eurprd04.prod.outlook.com ([fe80::95f5:5118:258f:ee40]) by AM6PR04MB4838.eurprd04.prod.outlook.com ([fe80::95f5:5118:258f:ee40%7]) with mapi id 15.20.7091.034; Sun, 17 Dec 2023 05:12:50 +0000 From: Frank Li To: krzysztof.kozlowski@linaro.org Cc: Frank.li@nxp.com, bhelgaas@google.com, conor+dt@kernel.org, devicetree@vger.kernel.org, festevam@gmail.com, helgaas@kernel.org, hongxing.zhu@nxp.com, imx@lists.linux.dev, kernel@pengutronix.de, krzysztof.kozlowski+dt@linaro.org, kw@linux.com, l.stach@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, lpieralisi@kernel.org, manivannan.sadhasivam@linaro.org, robh@kernel.org, s.hauer@pengutronix.de, shawnguo@kernel.org Subject: [PATCH v4 03/15] PCI: imx6: Simplify reset handling by using by using *_FLAG_HAS_*_RESET Date: Sun, 17 Dec 2023 00:11:58 -0500 Message-Id: <20231217051210.754832-4-Frank.Li@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231217051210.754832-1-Frank.Li@nxp.com> References: <20231217051210.754832-1-Frank.Li@nxp.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: BYAPR04CA0007.namprd04.prod.outlook.com (2603:10b6:a03:40::20) To AM6PR04MB4838.eurprd04.prod.outlook.com (2603:10a6:20b:4::16) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM6PR04MB4838:EE_|PAXPR04MB8174:EE_ X-MS-Office365-Filtering-Correlation-Id: b38736bc-4fd2-43b8-0d18-08dbfebed101 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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charset="utf-8" Refactors the reset handling logic in the imx6 PCI driver by adding IMX6_PCIE_FLAG_HAS_*_RESET bitmask define for drvdata::flags. The drvdata::flags and a bitmask ensures a cleaner and more scalable switch-case structure for handling reset. Reviewed-by: Philipp Zabel Signed-off-by: Frank Li Reviewed-by: Manivannan Sadhasivam --- Notes: Change from v2 to v3: - add Philipp's Reviewed-by tag Change from v1 to v2: - remove condition check before reset_control_(de)assert() because it is none ops if a NULL pointer pass down. - still keep condition check at probe to help identify dts file mismatch problem. =20 Change from v1 to v2: - remove condition check before reset_control_(de)assert() because it is none ops if a NULL pointer pass down. - still keep condition check at probe to help identify dts file mismatch problem. drivers/pci/controller/dwc/pci-imx6.c | 108 ++++++++++---------------- 1 file changed, 41 insertions(+), 67 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller= /dwc/pci-imx6.c index 91ba26a4b4c3d..c1fb38a2ebeb6 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -61,6 +61,8 @@ enum imx6_pcie_variants { #define IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE BIT(1) #define IMX6_PCIE_FLAG_SUPPORTS_SUSPEND BIT(2) #define IMX6_PCIE_FLAG_HAS_PHY BIT(3) +#define IMX6_PCIE_FLAG_HAS_APP_RESET BIT(4) +#define IMX6_PCIE_FLAG_HAS_PHY_RESET BIT(5) =20 #define imx6_check_flag(pci, val) (pci->drvdata->flags & val) =20 @@ -661,18 +663,10 @@ static void imx6_pcie_clk_disable(struct imx6_pcie *i= mx6_pcie) =20 static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) { + reset_control_assert(imx6_pcie->pciephy_reset); + reset_control_assert(imx6_pcie->apps_reset); + switch (imx6_pcie->drvdata->variant) { - case IMX7D: - case IMX8MQ: - case IMX8MQ_EP: - reset_control_assert(imx6_pcie->pciephy_reset); - fallthrough; - case IMX8MM: - case IMX8MM_EP: - case IMX8MP: - case IMX8MP_EP: - reset_control_assert(imx6_pcie->apps_reset); - break; case IMX6SX: regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX6SX_GPR12_PCIE_TEST_POWERDOWN, @@ -693,6 +687,8 @@ static void imx6_pcie_assert_core_reset(struct imx6_pci= e *imx6_pcie) regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, IMX6Q_GPR1_PCIE_REF_CLK_EN, 0 << 16); break; + default: + break; } =20 /* Some boards don't have PCIe reset GPIO. */ @@ -706,14 +702,10 @@ static int imx6_pcie_deassert_core_reset(struct imx6_= pcie *imx6_pcie) struct dw_pcie *pci =3D imx6_pcie->pci; struct device *dev =3D pci->dev; =20 + reset_control_deassert(imx6_pcie->pciephy_reset); + switch (imx6_pcie->drvdata->variant) { - case IMX8MQ: - case IMX8MQ_EP: - reset_control_deassert(imx6_pcie->pciephy_reset); - break; case IMX7D: - reset_control_deassert(imx6_pcie->pciephy_reset); - /* Workaround for ERR010728, failure of PCI-e PLL VCO to * oscillate, especially when cold. This turns off "Duty-cycle * Corrector" and other mysterious undocumented things. @@ -745,11 +737,7 @@ static int imx6_pcie_deassert_core_reset(struct imx6_p= cie *imx6_pcie) =20 usleep_range(200, 500); break; - case IMX6Q: /* Nothing to do */ - case IMX8MM: - case IMX8MM_EP: - case IMX8MP: - case IMX8MP_EP: + default: break; } =20 @@ -796,16 +784,11 @@ static void imx6_pcie_ltssm_enable(struct device *dev) IMX6Q_GPR12_PCIE_CTL_2, IMX6Q_GPR12_PCIE_CTL_2); break; - case IMX7D: - case IMX8MQ: - case IMX8MQ_EP: - case IMX8MM: - case IMX8MM_EP: - case IMX8MP: - case IMX8MP_EP: - reset_control_deassert(imx6_pcie->apps_reset); + default: break; } + + reset_control_deassert(imx6_pcie->apps_reset); } =20 static void imx6_pcie_ltssm_disable(struct device *dev) @@ -819,16 +802,11 @@ static void imx6_pcie_ltssm_disable(struct device *de= v) regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX6Q_GPR12_PCIE_CTL_2, 0); break; - case IMX7D: - case IMX8MQ: - case IMX8MQ_EP: - case IMX8MM: - case IMX8MM_EP: - case IMX8MP: - case IMX8MP_EP: - reset_control_assert(imx6_pcie->apps_reset); + default: break; } + + reset_control_assert(imx6_pcie->apps_reset); } =20 static int imx6_pcie_start_link(struct dw_pcie *pci) @@ -1287,36 +1265,24 @@ static int imx6_pcie_probe(struct platform_device *= pdev) "failed to get pcie phy\n"); } =20 - switch (imx6_pcie->drvdata->variant) { - case IMX7D: - if (dbi_base->start =3D=3D IMX8MQ_PCIE2_BASE_ADDR) - imx6_pcie->controller_id =3D 1; - - imx6_pcie->pciephy_reset =3D devm_reset_control_get_exclusive(dev, - "pciephy"); - if (IS_ERR(imx6_pcie->pciephy_reset)) { - dev_err(dev, "Failed to get PCIEPHY reset control\n"); - return PTR_ERR(imx6_pcie->pciephy_reset); - } - - imx6_pcie->apps_reset =3D devm_reset_control_get_exclusive(dev, - "apps"); - if (IS_ERR(imx6_pcie->apps_reset)) { - dev_err(dev, "Failed to get PCIE APPS reset control\n"); - return PTR_ERR(imx6_pcie->apps_reset); - } - break; - case IMX8MM: - case IMX8MM_EP: - case IMX8MP: - case IMX8MP_EP: - imx6_pcie->apps_reset =3D devm_reset_control_get_exclusive(dev, - "apps"); + if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_APP_RESET)) { + imx6_pcie->apps_reset =3D devm_reset_control_get_exclusive(dev, "apps"); if (IS_ERR(imx6_pcie->apps_reset)) return dev_err_probe(dev, PTR_ERR(imx6_pcie->apps_reset), "failed to get pcie apps reset control\n"); + } =20 - break; + if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_PHY_RESET)) { + imx6_pcie->pciephy_reset =3D devm_reset_control_get_exclusive(dev, "pcie= phy"); + if (IS_ERR(imx6_pcie->pciephy_reset)) + return dev_err_probe(dev, PTR_ERR(imx6_pcie->pciephy_reset), + "Failed to get PCIEPHY reset control\n"); + } + + switch (imx6_pcie->drvdata->variant) { + case IMX7D: + if (dbi_base->start =3D=3D IMX8MQ_PCIE2_BASE_ADDR) + imx6_pcie->controller_id =3D 1; default: break; } @@ -1441,31 +1407,39 @@ static const struct imx6_pcie_drvdata drvdata[] =3D= { }, [IMX7D] =3D { .variant =3D IMX7D, - .flags =3D IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, + .flags =3D IMX6_PCIE_FLAG_SUPPORTS_SUSPEND | + IMX6_PCIE_FLAG_HAS_APP_RESET | + IMX6_PCIE_FLAG_HAS_PHY_RESET, .gpr =3D "fsl,imx7d-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_NO_PHYDRV}, }, [IMX8MQ] =3D { .variant =3D IMX8MQ, + .flags =3D IMX6_PCIE_FLAG_HAS_APP_RESET | + IMX6_PCIE_FLAG_HAS_PHY_RESET, .gpr =3D "fsl,imx8mq-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_NO_PHYDRV, "pcie_aux"}, }, [IMX8MM] =3D { .variant =3D IMX8MM, .flags =3D IMX6_PCIE_FLAG_SUPPORTS_SUSPEND | - IMX6_PCIE_FLAG_HAS_PHY, + IMX6_PCIE_FLAG_HAS_PHY | + IMX6_PCIE_FLAG_HAS_APP_RESET, .gpr =3D "fsl,imx8mm-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, }, [IMX8MP] =3D { .variant =3D IMX8MP, .flags =3D IMX6_PCIE_FLAG_SUPPORTS_SUSPEND | - IMX6_PCIE_FLAG_HAS_PHY, + IMX6_PCIE_FLAG_HAS_PHY | + IMX6_PCIE_FLAG_HAS_APP_RESET, .gpr =3D "fsl,imx8mp-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, }, [IMX8MQ_EP] =3D { .variant =3D IMX8MQ_EP, + .flags =3D IMX6_PCIE_FLAG_HAS_PHY | + IMX6_PCIE_FLAG_HAS_PHY_RESET, .mode =3D DW_PCIE_EP_TYPE, .gpr =3D "fsl,imx8mq-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_NO_PHYDRV, "pcie_aux"}, --=20 2.34.1 From nobody Fri Dec 19 08:04:02 2025 Received: from EUR04-HE1-obe.outbound.protection.outlook.com (mail-he1eur04on2058.outbound.protection.outlook.com [40.107.7.58]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BA1205396; 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charset="utf-8" Avoid use get slot id by compared with register physical address. If there are more than 2 slots, compared logic will become complex. "linux,pci-domain" already exist at dts since first commit: commit (9e65987b9584d arm64: dts: imx8mp: Add iMX8MP PCIe support). So it is safe to remove compare basic address code: ... if (dbi_base->start =3D=3D IMX8MQ_PCIE2_BASE_ADDR) imx6_pcie->controller_id =3D 1; ... Signed-off-by: Frank Li --- Notes: Change from v3 to v4 - remove compare basic address logic Change from v2 to v3 - none Change from v1 to v2 - fix of_get_pci_domain_nr return value check logic drivers/pci/controller/dwc/pci-imx6.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller= /dwc/pci-imx6.c index c1fb38a2ebeb6..7145947e21d92 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -33,6 +33,7 @@ #include #include =20 +#include "../../pci.h" #include "pcie-designware.h" =20 #define IMX8MQ_GPR_PCIE_REF_USE_PAD BIT(9) @@ -40,7 +41,6 @@ #define IMX8MQ_GPR_PCIE_CLK_REQ_OVERRIDE BIT(11) #define IMX8MQ_GPR_PCIE_VREG_BYPASS BIT(12) #define IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE GENMASK(11, 8) -#define IMX8MQ_PCIE2_BASE_ADDR 0x33c00000 =20 #define to_imx6_pcie(x) dev_get_drvdata((x)->dev) =20 @@ -1279,13 +1279,11 @@ static int imx6_pcie_probe(struct platform_device *= pdev) "Failed to get PCIEPHY reset control\n"); } =20 - switch (imx6_pcie->drvdata->variant) { - case IMX7D: - if (dbi_base->start =3D=3D IMX8MQ_PCIE2_BASE_ADDR) - imx6_pcie->controller_id =3D 1; - default: - break; - } + /* Using linux,pci-domain as PCI slot id */ + imx6_pcie->controller_id =3D of_get_pci_domain_nr(node); + /* If there are not "linux,pci-domain" in dts file, means only 1 controll= er */ + if (imx6_pcie->controller_id < 0) + imx6_pcie->controller_id =3D 0; =20 /* Grab turnoff reset */ imx6_pcie->turnoff_reset =3D devm_reset_control_get_optional_exclusive(de= v, "turnoff"); --=20 2.34.1 From nobody Fri Dec 19 08:04:02 2025 Received: from EUR02-AM0-obe.outbound.protection.outlook.com (mail-am0eur02on2074.outbound.protection.outlook.com [40.107.247.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9F4615CB5; Sun, 17 Dec 2023 05:13:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nxp.com Authentication-Results: smtp.subspace.kernel.org; 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Sun, 17 Dec 2023 05:13:01 +0000 From: Frank Li To: krzysztof.kozlowski@linaro.org Cc: Frank.li@nxp.com, bhelgaas@google.com, conor+dt@kernel.org, devicetree@vger.kernel.org, festevam@gmail.com, helgaas@kernel.org, hongxing.zhu@nxp.com, imx@lists.linux.dev, kernel@pengutronix.de, krzysztof.kozlowski+dt@linaro.org, kw@linux.com, l.stach@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, lpieralisi@kernel.org, manivannan.sadhasivam@linaro.org, robh@kernel.org, s.hauer@pengutronix.de, shawnguo@kernel.org Subject: [PATCH v4 05/15] PCI: imx6: Simplify ltssm_enable() by using ltssm_off and ltssm_mask Date: Sun, 17 Dec 2023 00:12:00 -0500 Message-Id: <20231217051210.754832-6-Frank.Li@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231217051210.754832-1-Frank.Li@nxp.com> References: <20231217051210.754832-1-Frank.Li@nxp.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: BYAPR04CA0007.namprd04.prod.outlook.com (2603:10b6:a03:40::20) To AM6PR04MB4838.eurprd04.prod.outlook.com (2603:10a6:20b:4::16) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM6PR04MB4838:EE_|PAXPR04MB8174:EE_ X-MS-Office365-Filtering-Correlation-Id: fd9dc01f-d1b1-4ea6-c3cf-08dbfebed70e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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charset="utf-8" Add drvdata::ltssm_off and drvdata::ltssm_mask to simple imx6_pcie_ltssm_enable(disable)() logic. Signed-off-by: Frank Li --- Notes: Change from v1 to v3 - none drivers/pci/controller/dwc/pci-imx6.c | 37 ++++++++++++--------------- 1 file changed, 16 insertions(+), 21 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller= /dwc/pci-imx6.c index 7145947e21d92..79d892836a24d 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -75,6 +75,8 @@ struct imx6_pcie_drvdata { int dbi_length; const char *gpr; const char *clk_names[IMX6_PCIE_MAX_CLKS]; + const u32 ltssm_off; + const u32 ltssm_mask; }; =20 struct imx6_pcie { @@ -775,18 +777,11 @@ static int imx6_pcie_wait_for_speed_change(struct imx= 6_pcie *imx6_pcie) static void imx6_pcie_ltssm_enable(struct device *dev) { struct imx6_pcie *imx6_pcie =3D dev_get_drvdata(dev); + const struct imx6_pcie_drvdata *drvdata =3D imx6_pcie->drvdata; =20 - switch (imx6_pcie->drvdata->variant) { - case IMX6Q: - case IMX6SX: - case IMX6QP: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6Q_GPR12_PCIE_CTL_2, - IMX6Q_GPR12_PCIE_CTL_2); - break; - default: - break; - } + if (drvdata->ltssm_mask) + regmap_update_bits(imx6_pcie->iomuxc_gpr, drvdata->ltssm_off, drvdata->l= tssm_mask, + drvdata->ltssm_mask); =20 reset_control_deassert(imx6_pcie->apps_reset); } @@ -794,17 +789,11 @@ static void imx6_pcie_ltssm_enable(struct device *dev) static void imx6_pcie_ltssm_disable(struct device *dev) { struct imx6_pcie *imx6_pcie =3D dev_get_drvdata(dev); + const struct imx6_pcie_drvdata *drvdata =3D imx6_pcie->drvdata; =20 - switch (imx6_pcie->drvdata->variant) { - case IMX6Q: - case IMX6SX: - case IMX6QP: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6Q_GPR12_PCIE_CTL_2, 0); - break; - default: - break; - } + if (drvdata->ltssm_mask) + regmap_update_bits(imx6_pcie->iomuxc_gpr, drvdata->ltssm_off, + drvdata->ltssm_mask, 0); =20 reset_control_assert(imx6_pcie->apps_reset); } @@ -1385,6 +1374,8 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .dbi_length =3D 0x200, .gpr =3D "fsl,imx6q-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_NO_PHYDRV}, + .ltssm_off =3D IOMUXC_GPR12, + .ltssm_mask =3D IMX6Q_GPR12_PCIE_CTL_2, }, [IMX6SX] =3D { .variant =3D IMX6SX, @@ -1393,6 +1384,8 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { IMX6_PCIE_FLAG_SUPPORTS_SUSPEND, .gpr =3D "fsl,imx6q-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_NO_PHYDRV, "pcie_inbound_axi"}, + .ltssm_off =3D IOMUXC_GPR12, + .ltssm_mask =3D IMX6Q_GPR12_PCIE_CTL_2, }, [IMX6QP] =3D { .variant =3D IMX6QP, @@ -1402,6 +1395,8 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .dbi_length =3D 0x200, .gpr =3D "fsl,imx6q-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_NO_PHYDRV}, + .ltssm_off =3D IOMUXC_GPR12, + .ltssm_mask =3D IMX6Q_GPR12_PCIE_CTL_2, }, [IMX7D] =3D { .variant =3D IMX7D, --=20 2.34.1 From nobody Fri Dec 19 08:04:02 2025 Received: from EUR02-AM0-obe.outbound.protection.outlook.com (mail-am0eur02on2043.outbound.protection.outlook.com [40.107.247.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 870C163C6; 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charset="utf-8" Add drvdata::mode_off and drvdata::mode_mask to simple imx6_pcie_configure_type() logic. Signed-off-by: Frank Li --- Notes: Change from v2 to v3 - none Change from v1 to v2 - use ffs() to fixe build error. drivers/pci/controller/dwc/pci-imx6.c | 60 ++++++++++++++++++--------- 1 file changed, 40 insertions(+), 20 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller= /dwc/pci-imx6.c index 79d892836a24d..49b98593326f9 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -68,6 +68,7 @@ enum imx6_pcie_variants { =20 #define IMX6_PCIE_MAX_CLKS 6 =20 +#define IMX6_PCIE_MAX_INSTANCES 2 struct imx6_pcie_drvdata { enum imx6_pcie_variants variant; enum dw_pcie_device_mode mode; @@ -77,6 +78,8 @@ struct imx6_pcie_drvdata { const char *clk_names[IMX6_PCIE_MAX_CLKS]; const u32 ltssm_off; const u32 ltssm_mask; + const u32 mode_off[IMX6_PCIE_MAX_INSTANCES]; + const u32 mode_mask[IMX6_PCIE_MAX_INSTANCES]; }; =20 struct imx6_pcie { @@ -174,32 +177,25 @@ static unsigned int imx6_pcie_grp_offset(const struct= imx6_pcie *imx6_pcie) =20 static void imx6_pcie_configure_type(struct imx6_pcie *imx6_pcie) { - unsigned int mask, val, mode; + const struct imx6_pcie_drvdata *drvdata =3D imx6_pcie->drvdata; + unsigned int mask, val, mode, id; =20 - if (imx6_pcie->drvdata->mode =3D=3D DW_PCIE_EP_TYPE) + if (drvdata->mode =3D=3D DW_PCIE_EP_TYPE) mode =3D PCI_EXP_TYPE_ENDPOINT; else mode =3D PCI_EXP_TYPE_ROOT_PORT; =20 - switch (imx6_pcie->drvdata->variant) { - case IMX8MQ: - case IMX8MQ_EP: - if (imx6_pcie->controller_id =3D=3D 1) { - mask =3D IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE; - val =3D FIELD_PREP(IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE, - mode); - } else { - mask =3D IMX6Q_GPR12_DEVICE_TYPE; - val =3D FIELD_PREP(IMX6Q_GPR12_DEVICE_TYPE, mode); - } - break; - default: - mask =3D IMX6Q_GPR12_DEVICE_TYPE; - val =3D FIELD_PREP(IMX6Q_GPR12_DEVICE_TYPE, mode); - break; - } + id =3D imx6_pcie->controller_id; + + /* If mode_mask[id] is zero, means each controller have its individual gp= r */ + if (!drvdata->mode_mask[id]) + id =3D 0; + + mask =3D drvdata->mode_mask[id]; + /* FIELD_PREP mask have been constant */ + val =3D mode << (ffs(mask) - 1); =20 - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, mask, val); + regmap_update_bits(imx6_pcie->iomuxc_gpr, drvdata->mode_off[id], mask, va= l); } =20 static int pcie_phy_poll_ack(struct imx6_pcie *imx6_pcie, bool exp_val) @@ -1376,6 +1372,8 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .clk_names =3D {IMX6_CLKS_NO_PHYDRV}, .ltssm_off =3D IOMUXC_GPR12, .ltssm_mask =3D IMX6Q_GPR12_PCIE_CTL_2, + .mode_off[0] =3D IOMUXC_GPR12, + .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, }, [IMX6SX] =3D { .variant =3D IMX6SX, @@ -1386,6 +1384,8 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .clk_names =3D {IMX6_CLKS_NO_PHYDRV, "pcie_inbound_axi"}, .ltssm_off =3D IOMUXC_GPR12, .ltssm_mask =3D IMX6Q_GPR12_PCIE_CTL_2, + .mode_off[0] =3D IOMUXC_GPR12, + .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, }, [IMX6QP] =3D { .variant =3D IMX6QP, @@ -1397,6 +1397,8 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .clk_names =3D {IMX6_CLKS_NO_PHYDRV}, .ltssm_off =3D IOMUXC_GPR12, .ltssm_mask =3D IMX6Q_GPR12_PCIE_CTL_2, + .mode_off[0] =3D IOMUXC_GPR12, + .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, }, [IMX7D] =3D { .variant =3D IMX7D, @@ -1405,6 +1407,8 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { IMX6_PCIE_FLAG_HAS_PHY_RESET, .gpr =3D "fsl,imx7d-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_NO_PHYDRV}, + .mode_off[0] =3D IOMUXC_GPR12, + .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, }, [IMX8MQ] =3D { .variant =3D IMX8MQ, @@ -1412,6 +1416,10 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { IMX6_PCIE_FLAG_HAS_PHY_RESET, .gpr =3D "fsl,imx8mq-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_NO_PHYDRV, "pcie_aux"}, + .mode_off[0] =3D IOMUXC_GPR12, + .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, + .mode_off[1] =3D IOMUXC_GPR12, + .mode_mask[1] =3D IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE, }, [IMX8MM] =3D { .variant =3D IMX8MM, @@ -1420,6 +1428,8 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { IMX6_PCIE_FLAG_HAS_APP_RESET, .gpr =3D "fsl,imx8mm-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, + .mode_off[0] =3D IOMUXC_GPR12, + .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, }, [IMX8MP] =3D { .variant =3D IMX8MP, @@ -1428,6 +1438,8 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { IMX6_PCIE_FLAG_HAS_APP_RESET, .gpr =3D "fsl,imx8mp-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, + .mode_off[0] =3D IOMUXC_GPR12, + .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, }, [IMX8MQ_EP] =3D { .variant =3D IMX8MQ_EP, @@ -1436,6 +1448,10 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .mode =3D DW_PCIE_EP_TYPE, .gpr =3D "fsl,imx8mq-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_NO_PHYDRV, "pcie_aux"}, + .mode_off[0] =3D IOMUXC_GPR12, + .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, + .mode_off[1] =3D IOMUXC_GPR12, + .mode_mask[1] =3D IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE, }, [IMX8MM_EP] =3D { .variant =3D IMX8MM_EP, @@ -1443,6 +1459,8 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .mode =3D DW_PCIE_EP_TYPE, .gpr =3D "fsl,imx8mm-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, + .mode_off[0] =3D IOMUXC_GPR12, + .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, }, [IMX8MP_EP] =3D { .variant =3D IMX8MP_EP, @@ -1450,6 +1468,8 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .mode =3D DW_PCIE_EP_TYPE, .gpr =3D "fsl,imx8mp-iomuxc-gpr", .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, + .mode_off[0] =3D IOMUXC_GPR12, + .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, }, }; 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charset="utf-8" Add drvdata::init_phy() callback function, so difference SOC choose difference callback function to simple switch-case logic. Signed-off-by: Frank Li --- Notes: change from v1 to v4: - none drivers/pci/controller/dwc/pci-imx6.c | 135 ++++++++++++++------------ 1 file changed, 71 insertions(+), 64 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller= /dwc/pci-imx6.c index 49b98593326f9..02da650aa55ee 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -69,6 +69,9 @@ enum imx6_pcie_variants { #define IMX6_PCIE_MAX_CLKS 6 =20 #define IMX6_PCIE_MAX_INSTANCES 2 + +struct imx6_pcie; + struct imx6_pcie_drvdata { enum imx6_pcie_variants variant; enum dw_pcie_device_mode mode; @@ -80,6 +83,7 @@ struct imx6_pcie_drvdata { const u32 ltssm_mask; const u32 mode_off[IMX6_PCIE_MAX_INSTANCES]; const u32 mode_mask[IMX6_PCIE_MAX_INSTANCES]; + int (*init_phy)(struct imx6_pcie *pcie); }; =20 struct imx6_pcie { @@ -323,76 +327,69 @@ static int pcie_phy_write(struct imx6_pcie *imx6_pcie= , int addr, u16 data) return 0; } =20 -static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie) +static int imx8mq_pcie_init_phy(struct imx6_pcie *imx6_pcie) { - switch (imx6_pcie->drvdata->variant) { - case IMX8MM: - case IMX8MM_EP: - case IMX8MP: - case IMX8MP_EP: - /* - * The PHY initialization had been done in the PHY - * driver, break here directly. - */ - break; - case IMX8MQ: - case IMX8MQ_EP: - /* - * TODO: Currently this code assumes external - * oscillator is being used - */ + /* + * TODO: Currently this code assumes external + * oscillator is being used + */ + regmap_update_bits(imx6_pcie->iomuxc_gpr, + imx6_pcie_grp_offset(imx6_pcie), + IMX8MQ_GPR_PCIE_REF_USE_PAD, + IMX8MQ_GPR_PCIE_REF_USE_PAD); + /* + * Regarding the datasheet, the PCIE_VPH is suggested + * to be 1.8V. If the PCIE_VPH is supplied by 3.3V, the + * VREG_BYPASS should be cleared to zero. + */ + if (imx6_pcie->vph && regulator_get_voltage(imx6_pcie->vph) > 3000000) regmap_update_bits(imx6_pcie->iomuxc_gpr, imx6_pcie_grp_offset(imx6_pcie), - IMX8MQ_GPR_PCIE_REF_USE_PAD, - IMX8MQ_GPR_PCIE_REF_USE_PAD); - /* - * Regarding the datasheet, the PCIE_VPH is suggested - * to be 1.8V. If the PCIE_VPH is supplied by 3.3V, the - * VREG_BYPASS should be cleared to zero. - */ - if (imx6_pcie->vph && - regulator_get_voltage(imx6_pcie->vph) > 3000000) - regmap_update_bits(imx6_pcie->iomuxc_gpr, - imx6_pcie_grp_offset(imx6_pcie), - IMX8MQ_GPR_PCIE_VREG_BYPASS, - 0); - break; - case IMX7D: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX8MQ_GPR_PCIE_VREG_BYPASS, + 0); + + return 0; +} + +static int imx7d_pcie_init_phy(struct imx6_pcie *imx6_pcie) +{ + return regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0); - break; - case IMX6SX: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6SX_GPR12_PCIE_RX_EQ_MASK, - IMX6SX_GPR12_PCIE_RX_EQ_2); - fallthrough; - default: - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, +} + +static int imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie) +{ + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX6Q_GPR12_PCIE_CTL_2, 0 << 10); =20 - /* configure constant input signal to the pcie ctrl and phy */ - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6Q_GPR12_LOS_LEVEL, 9 << 4); - - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_DEEMPH_GEN1, - imx6_pcie->tx_deemph_gen1 << 0); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_DEEMPH_GEN2_3P5DB, - imx6_pcie->tx_deemph_gen2_3p5db << 6); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_DEEMPH_GEN2_6DB, - imx6_pcie->tx_deemph_gen2_6db << 12); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_SWING_FULL, - imx6_pcie->tx_swing_full << 18); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_SWING_LOW, - imx6_pcie->tx_swing_low << 25); - break; - } + /* configure constant input signal to the pcie ctrl and phy */ + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6Q_GPR12_LOS_LEVEL, 9 << 4); + + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_DEEMPH_GEN1, + imx6_pcie->tx_deemph_gen1 << 0); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_DEEMPH_GEN2_3P5DB, + imx6_pcie->tx_deemph_gen2_3p5db << 6); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_DEEMPH_GEN2_6DB, + imx6_pcie->tx_deemph_gen2_6db << 12); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_SWING_FULL, + imx6_pcie->tx_swing_full << 18); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_SWING_LOW, + imx6_pcie->tx_swing_low << 25); + return 0; +} =20 - imx6_pcie_configure_type(imx6_pcie); +static int imx6sx_pcie_init_phy(struct imx6_pcie *imx6_pcie) +{ + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6SX_GPR12_PCIE_RX_EQ_MASK, IMX6SX_GPR12_PCIE_RX_EQ_2); + + return imx6_pcie_init_phy(imx6_pcie); } =20 static void imx7d_pcie_wait_for_phy_pll_lock(struct imx6_pcie *imx6_pcie) @@ -903,7 +900,11 @@ static int imx6_pcie_host_init(struct dw_pcie_rp *pp) } =20 imx6_pcie_assert_core_reset(imx6_pcie); - imx6_pcie_init_phy(imx6_pcie); + + if (imx6_pcie->drvdata->init_phy) + imx6_pcie->drvdata->init_phy(imx6_pcie); + + imx6_pcie_configure_type(imx6_pcie); =20 ret =3D imx6_pcie_clk_enable(imx6_pcie); if (ret) { @@ -1374,6 +1375,7 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .ltssm_mask =3D IMX6Q_GPR12_PCIE_CTL_2, .mode_off[0] =3D IOMUXC_GPR12, .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, + .init_phy =3D imx6_pcie_init_phy, }, [IMX6SX] =3D { .variant =3D IMX6SX, @@ -1386,6 +1388,7 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .ltssm_mask =3D IMX6Q_GPR12_PCIE_CTL_2, .mode_off[0] =3D IOMUXC_GPR12, .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, + .init_phy =3D imx6sx_pcie_init_phy, }, [IMX6QP] =3D { .variant =3D IMX6QP, @@ -1399,6 +1402,7 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .ltssm_mask =3D IMX6Q_GPR12_PCIE_CTL_2, .mode_off[0] =3D IOMUXC_GPR12, .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, + .init_phy =3D imx6_pcie_init_phy, }, [IMX7D] =3D { .variant =3D IMX7D, @@ -1409,6 +1413,7 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .clk_names =3D {IMX6_CLKS_NO_PHYDRV}, .mode_off[0] =3D IOMUXC_GPR12, .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, + .init_phy =3D imx7d_pcie_init_phy, }, [IMX8MQ] =3D { .variant =3D IMX8MQ, @@ -1420,6 +1425,7 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, .mode_off[1] =3D IOMUXC_GPR12, .mode_mask[1] =3D IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE, + .init_phy =3D imx8mq_pcie_init_phy, }, [IMX8MM] =3D { .variant =3D IMX8MM, @@ -1452,6 +1458,7 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, .mode_off[1] =3D IOMUXC_GPR12, .mode_mask[1] =3D IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE, + .init_phy =3D imx8mq_pcie_init_phy, }, [IMX8MM_EP] =3D { .variant =3D IMX8MM_EP, --=20 2.34.1 From nobody Fri Dec 19 08:04:02 2025 Received: from EUR04-HE1-obe.outbound.protection.outlook.com (mail-he1eur04on2079.outbound.protection.outlook.com [40.107.7.79]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BE68779F4; 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charset="utf-8" There are clocks and clock-names restriction for difference compatible string. So needn't irrationality check again for clock's miniItems and maxItems. Signed-off-by: Frank Li --- Notes: Change from v1 to v4 - new patch at v4 .../bindings/pci/fsl,imx6q-pcie-common.yaml | 16 ---------------- 1 file changed, 16 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.ya= ml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml index d91b639ae7ae7..0c50487a3866d 100644 --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml @@ -150,22 +150,6 @@ allOf: - {} - const: pcie_phy - const: pcie_aux - - if: - properties: - compatible: - not: - contains: - enum: - - fsl,imx6sx-pcie - - fsl,imx8mq-pcie - - fsl,imx6sx-pcie-ep - - fsl,imx8mq-pcie-ep - then: - properties: - clocks: - maxItems: 3 - clock-names: - maxItems: 3 =20 - if: properties: --=20 2.34.1 From nobody Fri Dec 19 08:04:02 2025 Received: from EUR02-AM0-obe.outbound.protection.outlook.com (mail-am0eur02on2056.outbound.protection.outlook.com [40.107.247.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D0F26DDB2; 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charset="utf-8" snps,dw-pcie.yaml already have reg and reg-name information. Needn't duplciate here. Signed-off-by: Frank Li Acked-by: Rob Herring --- Notes: Change from v1 to v4: - new patch at v4 .../devicetree/bindings/pci/fsl,imx6q-pcie.yaml | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml b/Do= cumentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml index 81bbb8728f0f9..f20d4f0e3cb6c 100644 --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml @@ -30,16 +30,6 @@ properties: - fsl,imx8mm-pcie - fsl,imx8mp-pcie =20 - reg: - items: - - description: Data Bus Interface (DBI) registers. - - description: PCIe configuration space region. - - reg-names: - items: - - const: dbi - - const: config - clocks: minItems: 3 items: --=20 2.34.1 From nobody Fri Dec 19 08:04:02 2025 Received: from EUR02-AM0-obe.outbound.protection.outlook.com (mail-am0eur02on2080.outbound.protection.outlook.com [40.107.247.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B95AEE568; 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charset="utf-8" From: Richard Zhu Add i.MX95 PCIe "fsl,imx95-pcie" compatible string. Add "atu" and "app" to reg-names. Signed-off-by: Richard Zhu --- Notes: Change from v2 to v3 - Remove krzy's ACK tag - Add condition check for imx95, which required more reg-names then old platform, so need Krzy review again, =20 Change from v1 to v2 - add Krzy's ACK tag .../bindings/pci/fsl,imx6q-pcie-common.yaml | 1 + .../bindings/pci/fsl,imx6q-pcie.yaml | 18 ++++++++++++++++++ 2 files changed, 19 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.ya= ml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml index 0c50487a3866d..a8b34f58f8f49 100644 --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml @@ -207,6 +207,7 @@ allOf: - fsl,imx6sx-pcie - fsl,imx6q-pcie - fsl,imx6qp-pcie + - fsl,imx95-pcie - fsl,imx6sx-pcie-ep - fsl,imx6q-pcie-ep - fsl,imx6qp-pcie-ep diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml b/Do= cumentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml index f20d4f0e3cb6c..8633c622bd178 100644 --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml @@ -29,6 +29,7 @@ properties: - fsl,imx8mq-pcie - fsl,imx8mm-pcie - fsl,imx8mp-pcie + - fsl,imx95-pcie =20 clocks: minItems: 3 @@ -80,6 +81,22 @@ required: allOf: - $ref: /schemas/pci/snps,dw-pcie.yaml# - $ref: /schemas/pci/fsl,imx6q-pcie-common.yaml# + - if: + properties: + compatible: + enum: + - fsl,imx95-pcie + then: + properties: + reg: + minItems: 4 + reg-names: + items: + - const: dbi + - const: atu + - const: app + - const: config + - if: properties: compatible: @@ -101,6 +118,7 @@ allOf: compatible: enum: - fsl,imx8mq-pcie + - fsl,imx95-pcie then: properties: clocks: --=20 2.34.1 From nobody Fri Dec 19 08:04:02 2025 Received: from EUR02-AM0-obe.outbound.protection.outlook.com (mail-am0eur02on2089.outbound.protection.outlook.com [40.107.247.89]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F3ED8F9D7; 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charset="utf-8" Add iMX95 PCIe basic root complex function support. Signed-off-by: Frank Li --- Notes: Change from v1 to v3 - none drivers/pci/controller/dwc/pci-imx6.c | 90 +++++++++++++++++++++++++-- 1 file changed, 85 insertions(+), 5 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller= /dwc/pci-imx6.c index 02da650aa55ee..324c62cecfa5f 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -42,6 +42,25 @@ #define IMX8MQ_GPR_PCIE_VREG_BYPASS BIT(12) #define IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE GENMASK(11, 8) =20 +#define IMX95_PCIE_PHY_GEN_CTRL 0x0 +#define IMX95_PCIE_REF_USE_PAD BIT(17) + +#define IMX95_PCIE_PHY_MPLLA_CTRL 0x10 +#define IMX95_PCIE_PHY_MPLL_STATE BIT(30) + +#define IMX95_PCIE_SS_RW_REG_0 0xf0 +#define IMX95_PCIE_REF_CLKEN BIT(23) +#define IMX95_PCIE_PHY_CR_PARA_SEL BIT(9) + +#define IMX95_PE0_GEN_CTRL_1 0x1050 +#define IMX95_PCIE_DEVICE_TYPE GENMASK(3, 0) + +#define IMX95_PE0_GEN_CTRL_3 0x1058 +#define IMX95_PCIE_LTSSM_EN BIT(0) + +#define IMX95_PE0_PM_STS 0x1064 +#define IMX95_PCIE_PM_LINKST_IN_L2 BIT(14) + #define to_imx6_pcie(x) dev_get_drvdata((x)->dev) =20 enum imx6_pcie_variants { @@ -52,6 +71,7 @@ enum imx6_pcie_variants { IMX8MQ, IMX8MM, IMX8MP, + IMX95, IMX8MQ_EP, IMX8MM_EP, IMX8MP_EP, @@ -63,6 +83,7 @@ enum imx6_pcie_variants { #define IMX6_PCIE_FLAG_HAS_PHY BIT(3) #define IMX6_PCIE_FLAG_HAS_APP_RESET BIT(4) #define IMX6_PCIE_FLAG_HAS_PHY_RESET BIT(5) +#define IMX6_PCIE_FLAG_HAS_SERDES BIT(6) =20 #define imx6_check_flag(pci, val) (pci->drvdata->flags & val) =20 @@ -179,6 +200,24 @@ static unsigned int imx6_pcie_grp_offset(const struct = imx6_pcie *imx6_pcie) return imx6_pcie->controller_id =3D=3D 1 ? IOMUXC_GPR16 : IOMUXC_GPR14; } =20 +static int imx95_pcie_init_phy(struct imx6_pcie *imx6_pcie) +{ + regmap_update_bits(imx6_pcie->iomuxc_gpr, + IMX95_PCIE_SS_RW_REG_0, + IMX95_PCIE_PHY_CR_PARA_SEL, + IMX95_PCIE_PHY_CR_PARA_SEL); + + regmap_update_bits(imx6_pcie->iomuxc_gpr, + IMX95_PCIE_PHY_GEN_CTRL, + IMX95_PCIE_REF_USE_PAD, 0); + regmap_update_bits(imx6_pcie->iomuxc_gpr, + IMX95_PCIE_SS_RW_REG_0, + IMX95_PCIE_REF_CLKEN, + IMX95_PCIE_REF_CLKEN); + + return 0; +} + static void imx6_pcie_configure_type(struct imx6_pcie *imx6_pcie) { const struct imx6_pcie_drvdata *drvdata =3D imx6_pcie->drvdata; @@ -579,6 +618,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *i= mx6_pcie) IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16); break; case IMX7D: + case IMX95: break; case IMX8MM: case IMX8MM_EP: @@ -696,10 +736,19 @@ static int imx6_pcie_deassert_core_reset(struct imx6_= pcie *imx6_pcie) { struct dw_pcie *pci =3D imx6_pcie->pci; struct device *dev =3D pci->dev; + u32 val; =20 reset_control_deassert(imx6_pcie->pciephy_reset); =20 switch (imx6_pcie->drvdata->variant) { + case IMX95: + /* Polling the MPLL_STATE */ + if (regmap_read_poll_timeout(imx6_pcie->iomuxc_gpr, + IMX95_PCIE_PHY_MPLLA_CTRL, val, + val & IMX95_PCIE_PHY_MPLL_STATE, + 10, 10000)) + dev_err(dev, "PCIe PLL lock timeout\n"); + break; case IMX7D: /* Workaround for ERR010728, failure of PCI-e PLL VCO to * oscillate, especially when cold. This turns off "Duty-cycle @@ -1278,12 +1327,32 @@ static int imx6_pcie_probe(struct platform_device *= pdev) return PTR_ERR(imx6_pcie->turnoff_reset); } =20 + if (imx6_pcie->drvdata->gpr) { /* Grab GPR config register range */ - imx6_pcie->iomuxc_gpr =3D - syscon_regmap_lookup_by_compatible(imx6_pcie->drvdata->gpr); - if (IS_ERR(imx6_pcie->iomuxc_gpr)) { - dev_err(dev, "unable to find iomuxc registers\n"); - return PTR_ERR(imx6_pcie->iomuxc_gpr); + imx6_pcie->iomuxc_gpr =3D + syscon_regmap_lookup_by_compatible(imx6_pcie->drvdata->gpr); + if (IS_ERR(imx6_pcie->iomuxc_gpr)) + return dev_err_probe(dev, PTR_ERR(imx6_pcie->iomuxc_gpr), + "unable to find iomuxc registers\n"); + } + + if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_HAS_SERDES)) { + void __iomem *off =3D devm_platform_ioremap_resource_byname(pdev, "app"); + + if (IS_ERR(off)) + return dev_err_probe(dev, PTR_ERR(off), + "unable to find serdes registers\n"); + + static struct regmap_config regmap_config =3D { + .reg_bits =3D 32, + .val_bits =3D 32, + .reg_stride =3D 4, + }; + + imx6_pcie->iomuxc_gpr =3D devm_regmap_init_mmio(dev, off, ®map_config= ); + if (IS_ERR(imx6_pcie->iomuxc_gpr)) + return dev_err_probe(dev, PTR_ERR(imx6_pcie->iomuxc_gpr), + "unable to find iomuxc registers\n"); } =20 /* Grab PCIe PHY Tx Settings */ @@ -1447,6 +1516,16 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .mode_off[0] =3D IOMUXC_GPR12, .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, }, + [IMX95] =3D { + .variant =3D IMX95, + .flags =3D IMX6_PCIE_FLAG_HAS_SERDES, + .clk_names =3D {IMX6_CLKS_NO_PHYDRV, "pcie_aux"}, + .ltssm_off =3D IMX95_PE0_GEN_CTRL_3, + .ltssm_mask =3D IMX95_PCIE_LTSSM_EN, + .mode_off[0] =3D IMX95_PE0_GEN_CTRL_1, + .mode_mask[0] =3D IMX95_PCIE_DEVICE_TYPE, + .init_phy =3D imx95_pcie_init_phy, + }, [IMX8MQ_EP] =3D { .variant =3D IMX8MQ_EP, .flags =3D IMX6_PCIE_FLAG_HAS_PHY | @@ -1488,6 +1567,7 @@ static const struct of_device_id imx6_pcie_of_match[]= =3D { { .compatible =3D "fsl,imx8mq-pcie", .data =3D &drvdata[IMX8MQ], }, { .compatible =3D "fsl,imx8mm-pcie", .data =3D &drvdata[IMX8MM], }, { .compatible =3D "fsl,imx8mp-pcie", .data =3D &drvdata[IMX8MP], }, + { .compatible =3D "fsl,imx95-pcie", .data =3D &drvdata[IMX95], }, { .compatible =3D "fsl,imx8mq-pcie-ep", .data =3D &drvdata[IMX8MQ_EP], }, { .compatible =3D "fsl,imx8mm-pcie-ep", .data =3D &drvdata[IMX8MM_EP], }, { .compatible =3D "fsl,imx8mp-pcie-ep", .data =3D &drvdata[IMX8MP_EP], }, --=20 2.34.1 From nobody Fri Dec 19 08:04:02 2025 Received: from EUR04-HE1-obe.outbound.protection.outlook.com (mail-he1eur04on2047.outbound.protection.outlook.com [40.107.7.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 54528101F0; 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charset="utf-8" The common dw_pcie_ep_init() already do the same thing. Needn't platform driver do it again. Signed-off-by: Frank Li --- Notes: Change from v1 to v3 - new patches drivers/pci/controller/dwc/pci-imx6.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller= /dwc/pci-imx6.c index 324c62cecfa5f..54b90f8576915 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -1080,7 +1080,6 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_pc= ie, int ret; unsigned int pcie_dbi2_offset; struct dw_pcie_ep *ep; - struct resource *res; struct dw_pcie *pci =3D imx6_pcie->pci; struct dw_pcie_rp *pp =3D &pci->pp; struct device *dev =3D pci->dev; @@ -1099,14 +1098,8 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_p= cie, pcie_dbi2_offset =3D SZ_4K; break; } - pci->dbi_base2 =3D pci->dbi_base + pcie_dbi2_offset; - res =3D platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space"); - if (!res) - return -EINVAL; =20 - ep->phys_base =3D res->start; - ep->addr_size =3D resource_size(res); 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charset="utf-8" The i.MX EP exhibits variations in epc_features among different EP configurations. This introduces the addition of epc_features in imx6_pcie_drvdata to accommodate these differences. It's important to note that there are no functional changes in this commit; instead, it lays the groundwork for supporting i.MX95 EP functions. Signed-off-by: Frank Li --- Notes: Change from v1 to v3 - new patch at v3 drivers/pci/controller/dwc/pci-imx6.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller= /dwc/pci-imx6.c index 54b90f8576915..8f7b1533e2869 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -104,6 +104,7 @@ struct imx6_pcie_drvdata { const u32 ltssm_mask; const u32 mode_off[IMX6_PCIE_MAX_INSTANCES]; const u32 mode_mask[IMX6_PCIE_MAX_INSTANCES]; + const struct pci_epc_features *epc_features; int (*init_phy)(struct imx6_pcie *pcie); }; =20 @@ -1065,7 +1066,10 @@ static const struct pci_epc_features imx8m_pcie_epc_= features =3D { static const struct pci_epc_features* imx6_pcie_ep_get_features(struct dw_pcie_ep *ep) { - return &imx8m_pcie_epc_features; + struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep); + struct imx6_pcie *imx6_pcie =3D to_imx6_pcie(pci); + + return imx6_pcie->drvdata->epc_features; } =20 static const struct dw_pcie_ep_ops pcie_ep_ops =3D { @@ -1530,6 +1534,7 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, .mode_off[1] =3D IOMUXC_GPR12, .mode_mask[1] =3D IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE, + .epc_features =3D &imx8m_pcie_epc_features, .init_phy =3D imx8mq_pcie_init_phy, }, [IMX8MM_EP] =3D { @@ -1540,6 +1545,7 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, .mode_off[0] =3D IOMUXC_GPR12, .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, + .epc_features =3D &imx8m_pcie_epc_features, }, [IMX8MP_EP] =3D { .variant =3D IMX8MP_EP, @@ -1549,6 +1555,7 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .clk_names =3D {IMX6_CLKS_COMMON, "pcie_aux"}, .mode_off[0] =3D IOMUXC_GPR12, .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, + .epc_features =3D &imx8m_pcie_epc_features, }, }; =20 --=20 2.34.1 From nobody Fri Dec 19 08:04:02 2025 Received: from EUR02-AM0-obe.outbound.protection.outlook.com (mail-am0eur02on2088.outbound.protection.outlook.com [40.107.247.88]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D227A1097E; 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charset="utf-8" Add i.MX95 PCIe "fsl,imx95-pcie-ep" compatible string. Add reg-name: "atu", "dbi2", "dma" and "serdes". Signed-off-by: Frank Li --- Notes: Change from v1 to v3 - new patches at v3 .../bindings/pci/fsl,imx6q-pcie-ep.yaml | 52 ++++++++++++++++--- 1 file changed, 44 insertions(+), 8 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml b= /Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml index ee155ed5f1811..be9ea77ce8548 100644 --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml @@ -22,14 +22,7 @@ properties: - fsl,imx8mm-pcie-ep - fsl,imx8mq-pcie-ep - fsl,imx8mp-pcie-ep - - reg: - minItems: 2 - - reg-names: - items: - - const: dbi - - const: addr_space + - fsl,imx95-pcie-ep =20 clocks: minItems: 3 @@ -62,11 +55,46 @@ required: allOf: - $ref: /schemas/pci/snps,dw-pcie-ep.yaml# - $ref: /schemas/pci/fsl,imx6q-pcie-common.yaml# + - if: + properties: + compatible: + enum: + - fsl,imx8mm-pcie-ep + - fsl,imx8mq-pcie-ep + - fsl,imx8mp-pcie-ep + then: + properties: + reg: + minItems: 2 + reg-names: + items: + - const: dbi + - const: addr_space + + - if: + properties: + compatible: + enum: + - fsl,imx95-pcie-ep + then: + properties: + reg: + minItems: 6 + reg-names: + items: + - const: dbi + - const: atu + - const: dbi2 + - const: app + - const: dma + - const: addr_space + - if: properties: compatible: enum: - fsl,imx8mq-pcie-ep + - fsl,imx95-pcie-ep then: properties: clocks: @@ -87,6 +115,14 @@ allOf: - const: pcie_bus - const: pcie_aux =20 + - if: + properties: + compatible: + enum: + - fsl,imx95-pcie-ep + then: + properties: + linux,pci-domain: true =20 unevaluatedProperties: false =20 --=20 2.34.1 From nobody Fri Dec 19 08:04:02 2025 Received: from EUR04-HE1-obe.outbound.protection.outlook.com (mail-he1eur04on2070.outbound.protection.outlook.com [40.107.7.70]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8A18911711; 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charset="utf-8" Add iMX95 EP function support and add 64bit address support. Internal bus bridge for PCI support 64bit dma address in iMX95. So set call dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)). Signed-off-by: Frank Li --- Notes: Change from v3 to v4 - change align to 4k for imx95 Change from v1 to v3 - new patches at v3 drivers/pci/controller/dwc/pci-imx6.c | 45 +++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller= /dwc/pci-imx6.c index 8f7b1533e2869..5518c1b0d4fc1 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -75,6 +75,7 @@ enum imx6_pcie_variants { IMX8MQ_EP, IMX8MM_EP, IMX8MP_EP, + IMX95_EP, }; =20 #define IMX6_PCIE_FLAG_IMX6_PHY BIT(0) @@ -84,6 +85,7 @@ enum imx6_pcie_variants { #define IMX6_PCIE_FLAG_HAS_APP_RESET BIT(4) #define IMX6_PCIE_FLAG_HAS_PHY_RESET BIT(5) #define IMX6_PCIE_FLAG_HAS_SERDES BIT(6) +#define IMX6_PCIE_FLAG_SUPPORT_64BIT BIT(7) =20 #define imx6_check_flag(pci, val) (pci->drvdata->flags & val) =20 @@ -620,6 +622,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *i= mx6_pcie) break; case IMX7D: case IMX95: + case IMX95_EP: break; case IMX8MM: case IMX8MM_EP: @@ -1063,6 +1066,23 @@ static const struct pci_epc_features imx8m_pcie_epc_= features =3D { .align =3D SZ_64K, }; =20 +/* + * BAR# | Default BAR enable | Default BAR Type | Default BAR Size | BAR S= izing Scheme + * =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + * BAR0 | Enable | 64-bit | 1 MB | Programmable Size + * BAR1 | Disable | 32-bit | 64 KB | Fixed Size + * | (BAR0 is 64-bit) | if BAR0 is 32-bit | | As Bar0 is 64bit + * BAR2 | Enable | 32-bit | 1 MB | Programmable Size + * BAR3 | Enable | 32-bit | 64 KB | Programmable Size + * BAR4 | Enable | 32-bit | 1M | Programmable Size + * BAR5 | Enable | 32-bit | 64 KB | Programmable Size + */ +static const struct pci_epc_features imx95_pcie_epc_features =3D { + .msi_capable =3D true, + .bar_fixed_size[1] =3D SZ_64K, + .align =3D SZ_4K, +}; + static const struct pci_epc_features* imx6_pcie_ep_get_features(struct dw_pcie_ep *ep) { @@ -1105,6 +1125,14 @@ static int imx6_add_pcie_ep(struct imx6_pcie *imx6_p= cie, =20 pci->dbi_base2 =3D pci->dbi_base + pcie_dbi2_offset; =20 + /* + * db2 information should fetch from dtb file. dw_pcie_ep_init() can get = dbi_base2 from + * "dbi2" if pci->dbi_base2 is NULL. All code related pcie_dbi2_offset sh= ould be removed + * after all dts added "dbi2" reg. + */ + if (imx6_pcie->drvdata->variant =3D=3D IMX95_EP) + pci->dbi_base2 =3D NULL; + ret =3D dw_pcie_ep_init(ep); if (ret) { dev_err(dev, "failed to initialize endpoint\n"); @@ -1352,6 +1380,9 @@ static int imx6_pcie_probe(struct platform_device *pd= ev) "unable to find iomuxc registers\n"); } =20 + if (imx6_check_flag(imx6_pcie, IMX6_PCIE_FLAG_SUPPORT_64BIT)) + dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); + /* Grab PCIe PHY Tx Settings */ if (of_property_read_u32(node, "fsl,tx-deemph-gen1", &imx6_pcie->tx_deemph_gen1)) @@ -1557,6 +1588,19 @@ static const struct imx6_pcie_drvdata drvdata[] =3D { .mode_mask[0] =3D IMX6Q_GPR12_DEVICE_TYPE, .epc_features =3D &imx8m_pcie_epc_features, }, + [IMX95_EP] =3D { + .variant =3D IMX95_EP, + .flags =3D IMX6_PCIE_FLAG_HAS_SERDES | + IMX6_PCIE_FLAG_SUPPORT_64BIT, + .clk_names =3D {IMX6_CLKS_NO_PHYDRV, "pcie_aux"}, + .ltssm_off =3D IMX95_PE0_GEN_CTRL_3, + .ltssm_mask =3D IMX95_PCIE_LTSSM_EN, + .mode_off[0] =3D IMX95_PE0_GEN_CTRL_1, + .mode_mask[0] =3D IMX95_PCIE_DEVICE_TYPE, + .init_phy =3D imx95_pcie_init_phy, + .epc_features =3D &imx95_pcie_epc_features, + .mode =3D DW_PCIE_EP_TYPE, + }, }; =20 static const struct of_device_id imx6_pcie_of_match[] =3D { @@ -1571,6 +1615,7 @@ static const struct of_device_id imx6_pcie_of_match[]= =3D { { .compatible =3D "fsl,imx8mq-pcie-ep", .data =3D &drvdata[IMX8MQ_EP], }, { .compatible =3D "fsl,imx8mm-pcie-ep", .data =3D &drvdata[IMX8MM_EP], }, { .compatible =3D "fsl,imx8mp-pcie-ep", .data =3D &drvdata[IMX8MP_EP], }, + { .compatible =3D "fsl,imx95-pcie-ep", .data =3D &drvdata[IMX95_EP], }, {}, }; =20 --=20 2.34.1