pinctrl: add i.MXRT driver

Add i.MXRT pinctrl driver.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>

drivers/pinctrl/nxp/Kconfig

@@ -99,6 +99,20 @@ config PINCTRL_MXS
 	  familiy, e.g. i.MX28. This feature depends on device tree
 	  configuration.
 
+config PINCTRL_IMXRT
+	bool "IMXRT pinctrl driver"
+	depends on ARCH_IMXRT && PINCTRL_FULL
+	select DEVRES
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imxrt pinctrl driver
+
+	  This provides a simple pinctrl driver for i.MXRT SoC familiy.
+	  This feature depends on device tree configuration. This driver
+	  is different from the linux one, this is a simple implementation,
+	  only parses the 'fsl,pins' property and configure related
+	  registers.
+
 config PINCTRL_VYBRID
 	bool "Vybrid (vf610) pinctrl driver"
 	depends on ARCH_VF610 && PINCTRL_FULL

drivers/pinctrl/nxp/Makefile

@@ -8,3 +8,4 @@ obj-$(CONFIG_PINCTRL_IMX8)		+= pinctrl-imx8.o
 obj-$(CONFIG_PINCTRL_IMX8M)		+= pinctrl-imx8m.o
 obj-$(CONFIG_PINCTRL_MXS)		+= pinctrl-mxs.o
 obj-$(CONFIG_PINCTRL_VYBRID)		+= pinctrl-vf610.o
+obj-$(CONFIG_PINCTRL_IMXRT)		+= pinctrl-imxrt.o

drivers/pinctrl/nxp/pinctrl-imxrt.c

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/pinctrl.h>
+
+#include "pinctrl-imx.h"
+
+static struct imx_pinctrl_soc_info imxrt_pinctrl_soc_info = {
+	.flags = ZERO_OFFSET_VALID,
+};
+
+static int imxrt_pinctrl_probe(struct udevice *dev)
+{
+	struct imx_pinctrl_soc_info *info =
+		(struct imx_pinctrl_soc_info *)dev_get_driver_data(dev);
+
+	return imx_pinctrl_probe(dev, info);
+}
+
+static const struct udevice_id imxrt_pinctrl_match[] = {
+	{ .compatible = "fsl,imxrt-iomuxc",
+	  .data = (ulong)&imxrt_pinctrl_soc_info },
+	{ /* sentinel */ }
+};
+
+U_BOOT_DRIVER(imxrt_pinctrl) = {
+	.name = "imxrt-pinctrl",
+	.id = UCLASS_PINCTRL,
+	.of_match = of_match_ptr(imxrt_pinctrl_match),
+	.probe = imxrt_pinctrl_probe,
+	.remove = imx_pinctrl_remove,
+	.priv_auto_alloc_size = sizeof(struct imx_pinctrl_priv),
+	.ops = &imx_pinctrl_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};