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charset="utf-8" Refactor the clock handling in the Rockchip PCIe driver, introducing a more robust and efficient method for enabling and disabling clocks using clk_bulk*() API. Using the clk_bulk APIs, the clock handling for the core clocks becomes much simpler. Signed-off-by: Anand Moon --- v6: None. v5: switch to use use devm_clk_bulk_get_all()? gets rid of hardcoding the clock names in driver. v4: use dev_err_probe for error patch. v3: Fix typo in commit message, dropped reported by. v2: Fix compilation error reported by Intel test robot. --- drivers/pci/controller/pcie-rockchip.c | 65 +++----------------------- drivers/pci/controller/pcie-rockchip.h | 7 ++- 2 files changed, 10 insertions(+), 62 deletions(-) diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controlle= r/pcie-rockchip.c index c07d7129f1c7..2777ef0cb599 100644 --- a/drivers/pci/controller/pcie-rockchip.c +++ b/drivers/pci/controller/pcie-rockchip.c @@ -127,29 +127,9 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockc= hip) "failed to get ep GPIO\n"); } =20 - rockchip->aclk_pcie =3D devm_clk_get(dev, "aclk"); - if (IS_ERR(rockchip->aclk_pcie)) { - dev_err(dev, "aclk clock not found\n"); - return PTR_ERR(rockchip->aclk_pcie); - } - - rockchip->aclk_perf_pcie =3D devm_clk_get(dev, "aclk-perf"); - if (IS_ERR(rockchip->aclk_perf_pcie)) { - dev_err(dev, "aclk_perf clock not found\n"); - return PTR_ERR(rockchip->aclk_perf_pcie); - } - - rockchip->hclk_pcie =3D devm_clk_get(dev, "hclk"); - if (IS_ERR(rockchip->hclk_pcie)) { - dev_err(dev, "hclk clock not found\n"); - return PTR_ERR(rockchip->hclk_pcie); - } - - rockchip->clk_pcie_pm =3D devm_clk_get(dev, "pm"); - if (IS_ERR(rockchip->clk_pcie_pm)) { - dev_err(dev, "pm clock not found\n"); - return PTR_ERR(rockchip->clk_pcie_pm); - } + rockchip->num_clks =3D devm_clk_bulk_get_all(dev, &rockchip->clks); + if (rockchip->num_clks < 0) + return dev_err_probe(dev, err, "failed to get clocks\n"); =20 return 0; } @@ -372,39 +352,11 @@ int rockchip_pcie_enable_clocks(struct rockchip_pcie = *rockchip) struct device *dev =3D rockchip->dev; int err; =20 - err =3D clk_prepare_enable(rockchip->aclk_pcie); - if (err) { - dev_err(dev, "unable to enable aclk_pcie clock\n"); - return err; - } - - err =3D clk_prepare_enable(rockchip->aclk_perf_pcie); - if (err) { - dev_err(dev, "unable to enable aclk_perf_pcie clock\n"); - goto err_aclk_perf_pcie; - } - - err =3D clk_prepare_enable(rockchip->hclk_pcie); - if (err) { - dev_err(dev, "unable to enable hclk_pcie clock\n"); - goto err_hclk_pcie; - } - - err =3D clk_prepare_enable(rockchip->clk_pcie_pm); - if (err) { - dev_err(dev, "unable to enable clk_pcie_pm clock\n"); - goto err_clk_pcie_pm; - } + err =3D clk_bulk_prepare_enable(rockchip->num_clks, rockchip->clks); + if (err) + return dev_err_probe(dev, err, "failed to enable clocks\n"); =20 return 0; - -err_clk_pcie_pm: - clk_disable_unprepare(rockchip->hclk_pcie); -err_hclk_pcie: - clk_disable_unprepare(rockchip->aclk_perf_pcie); -err_aclk_perf_pcie: - clk_disable_unprepare(rockchip->aclk_pcie); - return err; } EXPORT_SYMBOL_GPL(rockchip_pcie_enable_clocks); =20 @@ -412,10 +364,7 @@ void rockchip_pcie_disable_clocks(void *data) { struct rockchip_pcie *rockchip =3D data; =20 - clk_disable_unprepare(rockchip->clk_pcie_pm); - clk_disable_unprepare(rockchip->hclk_pcie); 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Sun, 06 Oct 2024 11:25:11 -0700 (PDT) Received: from localhost.localdomain ([113.30.217.221]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2e1e85c905esm5458471a91.17.2024.10.06.11.25.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Oct 2024 11:25:11 -0700 (PDT) From: Anand Moon To: Shawn Lin , Lorenzo Pieralisi , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Manivannan Sadhasivam , Rob Herring , Bjorn Helgaas , Heiko Stuebner , Philipp Zabel , linux-pci@vger.kernel.org (open list:PCIE DRIVER FOR ROCKCHIP), linux-rockchip@lists.infradead.org (open list:PCIE DRIVER FOR ROCKCHIP), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Rockchip SoC support), linux-kernel@vger.kernel.org (open list) Cc: Anand Moon Subject: [PATCH v6 RESET 2/3] PCI: rockchip: Simplify reset control handling by using reset_control_bulk*() function Date: Sun, 6 Oct 2024 23:54:37 +0530 Message-ID: <20241006182445.3713-3-linux.amoon@gmail.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20241006182445.3713-1-linux.amoon@gmail.com> References: <20241006182445.3713-1-linux.amoon@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Refactor the reset control handling in the Rockchip PCIe driver, introducing a more robust and efficient method for assert and deassert reset controller using reset_control_bulk*() API. Using the reset_control_bulk APIs, the reset handling for the core clocks reset unit becomes much simpler. Spilt the reset controller in two groups as pre the RK3399 TRM. After power up, the software driver should de-assert the reset of PCIe PHY, then wait the PLL locked by polling the status, if PLL has locked, then can de-assert the rest reset simultaneously driver need to De-assert the reset pins simultionaly. PIPE_RESET_N/MGMT_STICKY_RESET_N/MGMT_RESET_N/RESET_N. Signed-off-by: Anand Moon --- V6: Add reason for the split of the RESET pins. v5: Fix the De-assert reset core as per the TRM De-assert the PIPE_RESET_N/MGMT_STICKY_RESET_N/MGMT_RESET_N/RESET_N simultaneously. v4: use dev_err_probe in error path. v3: Fix typo in commit message, dropped reported by. v2: Fix compilation error reported by Intel test robot fixed checkpatch warning --- drivers/pci/controller/pcie-rockchip.c | 151 +++++-------------------- drivers/pci/controller/pcie-rockchip.h | 26 +++-- 2 files changed, 49 insertions(+), 128 deletions(-) diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controlle= r/pcie-rockchip.c index 2777ef0cb599..87daa3288a01 100644 --- a/drivers/pci/controller/pcie-rockchip.c +++ b/drivers/pci/controller/pcie-rockchip.c @@ -30,7 +30,7 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip) struct platform_device *pdev =3D to_platform_device(dev); struct device_node *node =3D dev->of_node; struct resource *regs; - int err; + int err, i; =20 if (rockchip->is_rc) { regs =3D platform_get_resource_byname(pdev, @@ -69,55 +69,23 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockch= ip) if (rockchip->link_gen < 0 || rockchip->link_gen > 2) rockchip->link_gen =3D 2; =20 - rockchip->core_rst =3D devm_reset_control_get_exclusive(dev, "core"); - if (IS_ERR(rockchip->core_rst)) { - if (PTR_ERR(rockchip->core_rst) !=3D -EPROBE_DEFER) - dev_err(dev, "missing core reset property in node\n"); - return PTR_ERR(rockchip->core_rst); - } - - rockchip->mgmt_rst =3D devm_reset_control_get_exclusive(dev, "mgmt"); - if (IS_ERR(rockchip->mgmt_rst)) { - if (PTR_ERR(rockchip->mgmt_rst) !=3D -EPROBE_DEFER) - dev_err(dev, "missing mgmt reset property in node\n"); - return PTR_ERR(rockchip->mgmt_rst); - } - - rockchip->mgmt_sticky_rst =3D devm_reset_control_get_exclusive(dev, - "mgmt-sticky"); - if (IS_ERR(rockchip->mgmt_sticky_rst)) { - if (PTR_ERR(rockchip->mgmt_sticky_rst) !=3D -EPROBE_DEFER) - dev_err(dev, "missing mgmt-sticky reset property in node\n"); - return PTR_ERR(rockchip->mgmt_sticky_rst); - } - - rockchip->pipe_rst =3D devm_reset_control_get_exclusive(dev, "pipe"); - if (IS_ERR(rockchip->pipe_rst)) { - if (PTR_ERR(rockchip->pipe_rst) !=3D -EPROBE_DEFER) - dev_err(dev, "missing pipe reset property in node\n"); - return PTR_ERR(rockchip->pipe_rst); - } + for (i =3D 0; i < ROCKCHIP_NUM_PM_RSTS; i++) + rockchip->pm_rsts[i].id =3D rockchip_pci_pm_rsts[i]; =20 - rockchip->pm_rst =3D devm_reset_control_get_exclusive(dev, "pm"); - if (IS_ERR(rockchip->pm_rst)) { - if (PTR_ERR(rockchip->pm_rst) !=3D -EPROBE_DEFER) - dev_err(dev, "missing pm reset property in node\n"); - return PTR_ERR(rockchip->pm_rst); - } + err =3D devm_reset_control_bulk_get_optional_exclusive(dev, + ROCKCHIP_NUM_PM_RSTS, + rockchip->pm_rsts); + if (err) + return dev_err_probe(dev, err, "cannot get the reset control\n"); =20 - rockchip->pclk_rst =3D devm_reset_control_get_exclusive(dev, "pclk"); - if (IS_ERR(rockchip->pclk_rst)) { - if (PTR_ERR(rockchip->pclk_rst) !=3D -EPROBE_DEFER) - dev_err(dev, "missing pclk reset property in node\n"); - return PTR_ERR(rockchip->pclk_rst); - } + for (i =3D 0; i < ROCKCHIP_NUM_CORE_RSTS; i++) + rockchip->core_rsts[i].id =3D rockchip_pci_core_rsts[i]; =20 - rockchip->aclk_rst =3D devm_reset_control_get_exclusive(dev, "aclk"); - if (IS_ERR(rockchip->aclk_rst)) { - if (PTR_ERR(rockchip->aclk_rst) !=3D -EPROBE_DEFER) - dev_err(dev, "missing aclk reset property in node\n"); - return PTR_ERR(rockchip->aclk_rst); - } + err =3D devm_reset_control_bulk_get_optional_exclusive(dev, + ROCKCHIP_NUM_CORE_RSTS, + rockchip->core_rsts); + if (err) + return dev_err_probe(dev, err, "cannot get the reset control\n"); =20 if (rockchip->is_rc) { rockchip->ep_gpio =3D devm_gpiod_get_optional(dev, "ep", @@ -147,23 +115,10 @@ int rockchip_pcie_init_port(struct rockchip_pcie *roc= kchip) int err, i; u32 regs; =20 - err =3D reset_control_assert(rockchip->aclk_rst); - if (err) { - dev_err(dev, "assert aclk_rst err %d\n", err); - return err; - } - - err =3D reset_control_assert(rockchip->pclk_rst); - if (err) { - dev_err(dev, "assert pclk_rst err %d\n", err); - return err; - } - - err =3D reset_control_assert(rockchip->pm_rst); - if (err) { - dev_err(dev, "assert pm_rst err %d\n", err); - return err; - } + err =3D reset_control_bulk_assert(ROCKCHIP_NUM_PM_RSTS, + rockchip->pm_rsts); + if (err) + return dev_err_probe(dev, err, "reset bulk assert pm reset\n"); =20 for (i =3D 0; i < MAX_LANE_NUM; i++) { err =3D phy_init(rockchip->phys[i]); @@ -173,47 +128,17 @@ int rockchip_pcie_init_port(struct rockchip_pcie *roc= kchip) } } =20 - err =3D reset_control_assert(rockchip->core_rst); - if (err) { - dev_err(dev, "assert core_rst err %d\n", err); - goto err_exit_phy; - } - - err =3D reset_control_assert(rockchip->mgmt_rst); - if (err) { - dev_err(dev, "assert mgmt_rst err %d\n", err); - goto err_exit_phy; - } - - err =3D reset_control_assert(rockchip->mgmt_sticky_rst); - if (err) { - dev_err(dev, "assert mgmt_sticky_rst err %d\n", err); - goto err_exit_phy; - } - - err =3D reset_control_assert(rockchip->pipe_rst); - if (err) { - dev_err(dev, "assert pipe_rst err %d\n", err); - goto err_exit_phy; - } + err =3D reset_control_bulk_assert(ROCKCHIP_NUM_CORE_RSTS, + rockchip->core_rsts); + if (err) + return dev_err_probe(dev, err, "reset bulk assert core reset\n"); =20 udelay(10); =20 - err =3D reset_control_deassert(rockchip->pm_rst); - if (err) { - dev_err(dev, "deassert pm_rst err %d\n", err); - goto err_exit_phy; - } - - err =3D reset_control_deassert(rockchip->aclk_rst); + err =3D reset_control_bulk_deassert(ROCKCHIP_NUM_PM_RSTS, + rockchip->pm_rsts); if (err) { - dev_err(dev, "deassert aclk_rst err %d\n", err); - goto err_exit_phy; - } - - err =3D reset_control_deassert(rockchip->pclk_rst); - if (err) { - dev_err(dev, "deassert pclk_rst err %d\n", err); + dev_err(dev, "reset bulk deassert pm err %d\n", err); goto err_exit_phy; } =20 @@ -256,31 +181,15 @@ int rockchip_pcie_init_port(struct rockchip_pcie *roc= kchip) * Please don't reorder the deassert sequence of the following * four reset pins. */ - err =3D reset_control_deassert(rockchip->mgmt_sticky_rst); - if (err) { - dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err); - goto err_power_off_phy; - } - - err =3D reset_control_deassert(rockchip->core_rst); + err =3D reset_control_bulk_deassert(ROCKCHIP_NUM_CORE_RSTS, + rockchip->core_rsts); if (err) { - dev_err(dev, "deassert core_rst err %d\n", err); - goto err_power_off_phy; - } - - err =3D reset_control_deassert(rockchip->mgmt_rst); - if (err) { - dev_err(dev, "deassert mgmt_rst err %d\n", err); - goto err_power_off_phy; - } - - err =3D reset_control_deassert(rockchip->pipe_rst); - if (err) { - dev_err(dev, "deassert pipe_rst err %d\n", err); + dev_err(dev, "reset bulk deassert core err %d\n", err); goto err_power_off_phy; } =20 return 0; + err_power_off_phy: while (i--) phy_power_off(rockchip->phys[i]); diff --git a/drivers/pci/controller/pcie-rockchip.h b/drivers/pci/controlle= r/pcie-rockchip.h index bebab80c9553..2761699f670b 100644 --- a/drivers/pci/controller/pcie-rockchip.h +++ b/drivers/pci/controller/pcie-rockchip.h @@ -15,6 +15,7 @@ #include #include #include +#include =20 /* * The upper 16 bits of PCIE_CLIENT_CONFIG are a write mask for the lower = 16 @@ -288,18 +289,29 @@ (((c) << ((b) * 8 + 5)) & \ ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b)) =20 +#define ROCKCHIP_NUM_PM_RSTS ARRAY_SIZE(rockchip_pci_pm_rsts) +#define ROCKCHIP_NUM_CORE_RSTS ARRAY_SIZE(rockchip_pci_core_rsts) + +static const char * const rockchip_pci_pm_rsts[] =3D { + "pm", + "pclk", + "aclk", +}; 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Sun, 06 Oct 2024 11:25:19 -0700 (PDT) Received: from localhost.localdomain ([113.30.217.221]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2e1e85c905esm5458471a91.17.2024.10.06.11.25.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Oct 2024 11:25:19 -0700 (PDT) From: Anand Moon To: Shawn Lin , Lorenzo Pieralisi , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Manivannan Sadhasivam , Rob Herring , Bjorn Helgaas , Heiko Stuebner , Philipp Zabel , linux-pci@vger.kernel.org (open list:PCIE DRIVER FOR ROCKCHIP), linux-rockchip@lists.infradead.org (open list:PCIE DRIVER FOR ROCKCHIP), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Rockchip SoC support), linux-kernel@vger.kernel.org (open list) Cc: Anand Moon Subject: [PATCH v6 RESET 3/3] PCI: rockchip: Refactor rockchip_pcie_disable_clocks() function signature Date: Sun, 6 Oct 2024 23:54:38 +0530 Message-ID: <20241006182445.3713-4-linux.amoon@gmail.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20241006182445.3713-1-linux.amoon@gmail.com> References: <20241006182445.3713-1-linux.amoon@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Refactor the rockchip_pcie_disable_clocks function to accept a struct rockchip_pcie pointer instead of a void pointer. This change improves type safety and code readability by explicitly specifying the expected data type. Reviewed-by: Manivannan Sadhasivam Signed-off-by: Anand Moon --- v6: Fix the subject, add the missing () in the function name. v5: Fix the commit message and add r-b Manivannan. v4: None v3: None v2: None --- drivers/pci/controller/pcie-rockchip.c | 3 +-- drivers/pci/controller/pcie-rockchip.h | 2 +- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controlle= r/pcie-rockchip.c index 87daa3288a01..b528d561b2de 100644 --- a/drivers/pci/controller/pcie-rockchip.c +++ b/drivers/pci/controller/pcie-rockchip.c @@ -269,9 +269,8 @@ int rockchip_pcie_enable_clocks(struct rockchip_pcie *r= ockchip) } EXPORT_SYMBOL_GPL(rockchip_pcie_enable_clocks); =20 -void rockchip_pcie_disable_clocks(void *data) +void rockchip_pcie_disable_clocks(struct rockchip_pcie *rockchip) { - struct rockchip_pcie *rockchip =3D data; =20 clk_bulk_disable_unprepare(rockchip->num_clks, rockchip->clks); } diff --git a/drivers/pci/controller/pcie-rockchip.h b/drivers/pci/controlle= r/pcie-rockchip.h index 2761699f670b..7f0f938e9195 100644 --- a/drivers/pci/controller/pcie-rockchip.h +++ b/drivers/pci/controller/pcie-rockchip.h @@ -347,7 +347,7 @@ int rockchip_pcie_init_port(struct rockchip_pcie *rockc= hip); int rockchip_pcie_get_phys(struct rockchip_pcie *rockchip); void rockchip_pcie_deinit_phys(struct rockchip_pcie *rockchip); int rockchip_pcie_enable_clocks(struct rockchip_pcie *rockchip); -void rockchip_pcie_disable_clocks(void *data); +void rockchip_pcie_disable_clocks(struct rockchip_pcie *rockchip); void rockchip_pcie_cfg_configuration_accesses( struct rockchip_pcie *rockchip, u32 type); =20 --=20 2.44.0