[PATCH v2 2/9] reset: simple: Add support for Freescale i.MX95 GPU reset

[Marek Vasut]

The instance of the GPU populated in Freescale i.MX95 does require
release from reset by writing into a single GPUMIX block controller
GPURESET register bit 0. Implement support for this reset register.

Signed-off-by: Marek Vasut <marex at denx.de>
---
Cc: Boris Brezillon <boris.brezillon at collabora.com>
Cc: Conor Dooley <conor+dt at kernel.org>
Cc: David Airlie <airlied at gmail.com>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Krzysztof Kozlowski <krzk+dt at kernel.org>
Cc: Liviu Dudau <liviu.dudau at arm.com>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Maxime Ripard <mripard at kernel.org>
Cc: Pengutronix Kernel Team <kernel at pengutronix.de>
Cc: Philipp Zabel <p.zabel at pengutronix.de>
Cc: Rob Herring <robh at kernel.org>
Cc: Sascha Hauer <s.hauer at pengutronix.de>
Cc: Sebastian Reichel <sre at kernel.org>
Cc: Shawn Guo <shawnguo at kernel.org>
Cc: Simona Vetter <simona at ffwll.ch>
Cc: Steven Price <steven.price at arm.com>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: devicetree at vger.kernel.org
Cc: dri-devel at lists.freedesktop.org
Cc: imx at lists.linux.dev
Cc: linux-arm-kernel at lists.infradead.org
---
V2: - Set nr_resets=1 to limit the amount of resets to single bit
    - Switch from fsl, to nxp, vendor prefix
    - Add RESET_IMX95_GPU Kconfig symbol to select this reset driver
      on MX9
---
 drivers/reset/Kconfig        | 8 ++++++++
 drivers/reset/reset-simple.c | 9 +++++++++
 2 files changed, 17 insertions(+)

diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 99f6f9784e686..0b48e76fd0aab 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -249,12 +249,20 @@ config RESET_SIMPLE
 	   - Altera SoCFPGAs
 	   - ASPEED BMC SoCs
 	   - Bitmain BM1880 SoC
+	   - NXP i.MX95 GPU
 	   - Realtek SoCs
 	   - RCC reset controller in STM32 MCUs
 	   - Allwinner SoCs
 	   - SiFive FU740 SoCs
 	   - Sophgo SoCs
 
+config RESET_IMX95_GPU
+	bool "NXP i.MX95 GPU Reset Driver" if COMPILE_TEST && !SOC_IMX9
+	default SOC_IMX9
+	select RESET_SIMPLE
+	help
+	  This enables the reset driver for i.MX95 GPU.
+
 config RESET_SOCFPGA
 	bool "SoCFPGA Reset Driver" if COMPILE_TEST && (!ARM || !ARCH_INTEL_SOCFPGA)
 	default ARM && ARCH_INTEL_SOCFPGA
diff --git a/drivers/reset/reset-simple.c b/drivers/reset/reset-simple.c
index 2760678398308..64aeda8f76b75 100644
--- a/drivers/reset/reset-simple.c
+++ b/drivers/reset/reset-simple.c
@@ -133,9 +133,18 @@ static const struct reset_simple_devdata reset_simple_active_low = {
 	.status_active_low = true,
 };
 
+static const struct reset_simple_devdata reset_simple_fsl_imx95_gpu_blk_ctrl = {
+	.reg_offset = 0x8,
+	.active_low = true,
+	.nr_resets = 1,
+	.status_active_low = true,
+};
+
 static const struct of_device_id reset_simple_dt_ids[] = {
 	{ .compatible = "altr,stratix10-rst-mgr",
 		.data = &reset_simple_socfpga },
+	{ .compatible = "nxp,imx95-gpu-blk-ctrl",
+		.data = &reset_simple_fsl_imx95_gpu_blk_ctrl },
 	{ .compatible = "st,stm32-rcc", },
 	{ .compatible = "allwinner,sun6i-a31-clock-reset",
 		.data = &reset_simple_active_low },
-- 
2.47.2