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Signed-off-by: Liu Ying Signed-off-by: Laurentiu Mihalcea --- .../reset/nxp,imx8ulp-avd-sim-reset.yaml | 58 +++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 Documentation/devicetree/bindings/reset/nxp,imx8ulp-avd= -sim-reset.yaml diff --git a/Documentation/devicetree/bindings/reset/nxp,imx8ulp-avd-sim-re= set.yaml b/Documentation/devicetree/bindings/reset/nxp,imx8ulp-avd-sim-rese= t.yaml new file mode 100644 index 000000000000..f6797966fd35 --- /dev/null +++ b/Documentation/devicetree/bindings/reset/nxp,imx8ulp-avd-sim-reset.yaml @@ -0,0 +1,58 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/reset/nxp,imx8ulp-avd-sim-reset.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NXP i.MX8ULP System Integration Module Reset Controller + +maintainers: + - Liu Ying + +description: + Some instances of i.MX8ULP's SIM may offer control over the reset of some + components of a certain domain (example - AVD-SIM). + +properties: + compatible: + items: + - enum: + - nxp,imx8ulp-avd-sim-reset + - const: syscon + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + '#reset-cells': + const: 1 + + mux-controller: + $ref: /schemas/mux/reg-mux.yaml# + +required: + - compatible + - reg + - clocks + - '#reset-cells' + - mux-controller + +additionalProperties: false + +examples: + - | + #include + syscon@2da50000 { + compatible =3D "nxp,imx8ulp-avd-sim-reset", "syscon"; + reg =3D <0x2da50000 0x38>; + clocks =3D <&pcc5 IMX8ULP_CLK_AVD_SIM>; + #reset-cells =3D <1>; + + mux-controller { + compatible =3D "mmio-mux"; + #mux-control-cells =3D <1>; + mux-reg-masks =3D <0x8 0x00000200>; + }; + }; --=20 2.34.1 From nobody Mon Feb 9 03:53:02 2026 Received: from mail-ej1-f50.google.com (mail-ej1-f50.google.com [209.85.218.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EF3943BBEA; Sun, 15 Sep 2024 11:45:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.50 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726400702; cv=none; b=j4OA8nQ/eNLrQE2f2hquvAKH+kJ2KUc6SoiOujwPgy1IIUVVFQGF4A7a4gDSRcnCpLeTdt52ko8AP2GZf5BU8exG240emdFoR8xPz8O5UwrCJWn+g1sQND/KgXotqMpPRAnUyqDPDCOqpqwNVbtqMZgltyEXAv6Gt3pMzUtgGNE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726400702; 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charset="utf-8" Certain components can be reset via the SIM module. Add reset controller driver for the SIM module to allow drivers for said components to control the reset signal(s). Signed-off-by: Liu Ying Signed-off-by: Laurentiu Mihalcea Reviewed-by: Daniel Baluta --- drivers/reset/Kconfig | 7 ++ drivers/reset/Makefile | 1 + drivers/reset/reset-imx8ulp-sim.c | 106 ++++++++++++++++++++++++++++++ 3 files changed, 114 insertions(+) create mode 100644 drivers/reset/reset-imx8ulp-sim.c diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index 5484a65f66b9..492081354d03 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -113,6 +113,13 @@ config RESET_IMX8MP_AUDIOMIX help This enables the reset controller driver for i.MX8MP AudioMix =20 +config RESET_IMX8ULP_SIM + tristate "i.MX8ULP SIM Reset Driver" + depends on ARCH_MXC + help + This enables the SIM (System Integration Module) reset driver + for i.MX8ULP SoC. + config RESET_INTEL_GW bool "Intel Reset Controller Driver" depends on X86 || COMPILE_TEST diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index 4411a2a124d7..38354e701811 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_RESET_GPIO) +=3D reset-gpio.o obj-$(CONFIG_RESET_HSDK) +=3D reset-hsdk.o obj-$(CONFIG_RESET_IMX7) +=3D reset-imx7.o obj-$(CONFIG_RESET_IMX8MP_AUDIOMIX) +=3D reset-imx8mp-audiomix.o +obj-$(CONFIG_RESET_IMX8ULP_SIM) +=3D reset-imx8ulp-sim.o obj-$(CONFIG_RESET_INTEL_GW) +=3D reset-intel-gw.o obj-$(CONFIG_RESET_K210) +=3D reset-k210.o obj-$(CONFIG_RESET_LANTIQ) +=3D reset-lantiq.o diff --git a/drivers/reset/reset-imx8ulp-sim.c b/drivers/reset/reset-imx8ul= p-sim.c new file mode 100644 index 000000000000..04ff11d41e10 --- /dev/null +++ b/drivers/reset/reset-imx8ulp-sim.c @@ -0,0 +1,106 @@ +// SPDX-License-Identifier: GPL-2.0+ + +/* + * Copyright 2024 NXP + */ + +#include +#include +#include +#include +#include +#include +#include + +#define IMX8ULP_SIM_RESET_MIPI_DSI_RST_DPI_N 0 +#define IMX8ULP_SIM_RESET_MIPI_DSI_RST_ESC_N 1 +#define IMX8ULP_SIM_RESET_MIPI_DSI_RST_BYTE_N 2 + +#define IMX8ULP_SIM_RESET_NUM 3 + +#define AVD_SIM_SYSCTRL0 0x8 + +struct imx8ulp_sim_reset { + struct reset_controller_dev rcdev; + struct regmap *regmap; +}; + +static const u32 imx8ulp_sim_reset_bits[IMX8ULP_SIM_RESET_NUM] =3D { + [IMX8ULP_SIM_RESET_MIPI_DSI_RST_DPI_N] =3D BIT(3), + [IMX8ULP_SIM_RESET_MIPI_DSI_RST_ESC_N] =3D BIT(4), + [IMX8ULP_SIM_RESET_MIPI_DSI_RST_BYTE_N] =3D BIT(5), +}; + +static inline struct imx8ulp_sim_reset * +to_imx8ulp_sim_reset(struct reset_controller_dev *rcdev) +{ + return container_of(rcdev, struct imx8ulp_sim_reset, rcdev); +} + +static int imx8ulp_sim_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct imx8ulp_sim_reset *simr =3D to_imx8ulp_sim_reset(rcdev); + const u32 bit =3D imx8ulp_sim_reset_bits[id]; + + return regmap_update_bits(simr->regmap, AVD_SIM_SYSCTRL0, bit, 0); +} + +static int imx8ulp_sim_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct imx8ulp_sim_reset *simr =3D to_imx8ulp_sim_reset(rcdev); + const u32 bit =3D imx8ulp_sim_reset_bits[id]; + + return regmap_update_bits(simr->regmap, AVD_SIM_SYSCTRL0, bit, bit); +} + +static const struct reset_control_ops imx8ulp_sim_reset_ops =3D { + .assert =3D imx8ulp_sim_reset_assert, + .deassert =3D imx8ulp_sim_reset_deassert, +}; + +static const struct of_device_id imx8ulp_sim_reset_dt_ids[] =3D { + { .compatible =3D "nxp,imx8ulp-avd-sim-reset", }, + { /* sentinel */ }, +}; + +static int imx8ulp_sim_reset_probe(struct platform_device *pdev) +{ + struct device *dev =3D &pdev->dev; + struct imx8ulp_sim_reset *simr; + int ret; + + simr =3D devm_kzalloc(dev, sizeof(*simr), GFP_KERNEL); + if (!simr) + return -ENOMEM; + + simr->regmap =3D syscon_node_to_regmap(dev->of_node); + if (IS_ERR(simr->regmap)) + return dev_err_probe(&pdev->dev, PTR_ERR(simr->regmap), + "failed to get regmap\n"); + + simr->rcdev.owner =3D THIS_MODULE; + simr->rcdev.nr_resets =3D IMX8ULP_SIM_RESET_NUM; + simr->rcdev.ops =3D &imx8ulp_sim_reset_ops; + simr->rcdev.of_node =3D dev->of_node; + + ret =3D devm_of_platform_populate(dev); + if (ret) + return ret; + + return devm_reset_controller_register(dev, &simr->rcdev); +} + +static struct platform_driver imx8ulp_sim_reset_driver =3D { + .probe =3D imx8ulp_sim_reset_probe, + .driver =3D { + .name =3D KBUILD_MODNAME, + .of_match_table =3D imx8ulp_sim_reset_dt_ids, + }, +}; +module_platform_driver(imx8ulp_sim_reset_driver); + +MODULE_AUTHOR("Liu Ying "); +MODULE_DESCRIPTION("NXP i.MX8ULP System Integration Module Reset driver"); +MODULE_LICENSE("GPL"); --=20 2.34.1 From nobody Mon Feb 9 03:53:02 2026 Received: from mail-ej1-f43.google.com (mail-ej1-f43.google.com [209.85.218.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DCE351C688B; Sun, 15 Sep 2024 11:45:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.43 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726400705; cv=none; b=NTswAGsImU6hBPwxx5pqADDuOWedpOX3Sd+zm6mqSX4tC4fm0/hQPITFWwdqQXgp5vy8QiZ9VkMLq8vCzhsC6Y5covNWDP624+f/gPrAc2YFxNjKINkSbW4S9T3imFVGlHV8Yh8dozk04FOPKszZ37F08qzGaNTNsLE9nYihD3U= ARC-Message-Signature: i=1; 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Sun, 15 Sep 2024 04:45:01 -0700 (PDT) From: Laurentiu Mihalcea X-Google-Original-From: Laurentiu Mihalcea To: Rob Herring , Krzysztof Kozlowski , Shawn Guo , Philipp Zabel , Liu Ying , Sascha Hauer , Conor Dooley Cc: devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 3/3] arm64: dts: imx8ulp: add AVD-SIM node Date: Sun, 15 Sep 2024 07:43:11 -0400 Message-Id: <20240915114311.75496-4-laurentiu.mihalcea@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240915114311.75496-1-laurentiu.mihalcea@nxp.com> References: <20240915114311.75496-1-laurentiu.mihalcea@nxp.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" Add node for imx8ulp's AVD-SIM module. This also includes its children. Signed-off-by: Liu Ying Signed-off-by: Laurentiu Mihalcea --- arch/arm64/boot/dts/freescale/imx8ulp.dtsi | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi b/arch/arm64/boot/d= ts/freescale/imx8ulp.dtsi index e32d5afcf4a9..1ffa4da23042 100644 --- a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi @@ -614,6 +614,19 @@ per_bridge5: bus@2d800000 { #size-cells =3D <1>; ranges; =20 + avd_sim: syscon@2da50000 { + compatible =3D "nxp,imx8ulp-avd-sim-reset", "syscon"; + reg =3D <0x2da50000 0x38>; + clocks =3D <&pcc5 IMX8ULP_CLK_AVD_SIM>; + #reset-cells =3D <1>; + + mux: mux-controller { + compatible =3D "mmio-mux"; + #mux-control-cells =3D <1>; + mux-reg-masks =3D <0x8 0x00000200>; + }; + }; + cgc2: clock-controller@2da60000 { compatible =3D "fsl,imx8ulp-cgc2"; reg =3D <0x2da60000 0x10000>; --=20 2.34.1