pinctrl: Add i.MX7ULP pinctrl driver

Add i.MX7ULP pinctrl driver.
Select CONFIG_PINCTRL_IMX7ULP to use this driver.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by : Stefano Babic <sbabic@denx.de>

drivers/pinctrl/nxp/Kconfig

@@ -42,3 +42,17 @@ config PINCTRL_IMX7
 	  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_IMX7ULP
+	bool "IMX7ULP pinctrl driver"
+	depends on ARCH_MX7ULP && PINCTRL_FULL
+	select DEVRES
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx7ulp pinctrl driver
+
+	  This provides a simple pinctrl driver for i.MX7ULP 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.

drivers/pinctrl/nxp/Makefile

@@ -2,3 +2,4 @@ obj-$(CONFIG_PINCTRL_IMX)		+= pinctrl-imx.o
 obj-$(CONFIG_PINCTRL_IMX5)		+= pinctrl-imx5.o
 obj-$(CONFIG_PINCTRL_IMX6)		+= pinctrl-imx6.o
 obj-$(CONFIG_PINCTRL_IMX7)		+= pinctrl-imx7.o
+obj-$(CONFIG_PINCTRL_IMX7ULP)		+= pinctrl-imx7ulp.o

drivers/pinctrl/nxp/pinctrl-imx.c

@@ -24,6 +24,7 @@ static int imx_pinctrl_set_state(struct udevice *dev, struct udevice *config)
 	u32 *pin_data;
 	int npins, size, pin_size;
 	int mux_reg, conf_reg, input_reg, input_val, mux_mode, config_val;
+	u32 mux_shift = info->mux_mask ? ffs(info->mux_mask) - 1 : 0;
 	int i, j = 0;
 
 	dev_dbg(dev, "%s: %s\n", __func__, config->name);
@@ -97,8 +98,8 @@ static int imx_pinctrl_set_state(struct udevice *dev, struct udevice *config)
 
 		/* Set Mux */
 		if (info->flags & SHARE_MUX_CONF_REG) {
-			clrsetbits_le32(info->base + mux_reg, 0x7 << 20,
+			clrsetbits_le32(info->base + mux_reg, info->mux_mask,
-					mux_mode << 20);
+					mux_mode << mux_shift);
 		} else {
 			writel(mux_mode, info->base + mux_reg);
 		}
@@ -154,8 +155,8 @@ static int imx_pinctrl_set_state(struct udevice *dev, struct udevice *config)
 		/* Set config */
 		if (!(config_val & IMX_NO_PAD_CTL)) {
 			if (info->flags & SHARE_MUX_CONF_REG) {
-				clrsetbits_le32(info->base + conf_reg, 0xffff,
+				clrsetbits_le32(info->base + conf_reg,
-						config_val);
+						info->mux_mask, config_val);
 			} else {
 				writel(config_val, info->base + conf_reg);
 			}
@@ -200,6 +201,7 @@ int imx_pinctrl_probe(struct udevice *dev,
 		return -ENOMEM;
 	priv->info = info;
 
+	info->mux_mask = fdtdec_get_int(gd->fdt_blob, node, "fsl,mux_mask", 0);
 	/*
 	 * Refer to linux documentation for details:
 	 * Documentation/devicetree/bindings/pinctrl/fsl,imx7d-pinctrl.txt

drivers/pinctrl/nxp/pinctrl-imx.h

@@ -11,11 +11,13 @@
  * @base: the address to the controller in virtual memory
  * @input_sel_base: the address of the select input in virtual memory.
  * @flags: flags specific for each soc
+ * @mux_mask: Used when SHARE_MUX_CONF_REG flag is added
  */
 struct imx_pinctrl_soc_info {
 	void __iomem *base;
 	void __iomem *input_sel_base;
 	unsigned int flags;
+	unsigned int mux_mask;
 };
 
 /**
@@ -41,6 +43,7 @@ extern const struct pinctrl_ops imx_pinctrl_ops;
 
 #define SHARE_MUX_CONF_REG	0x1
 #define ZERO_OFFSET_VALID	0x2
+#define CONFIG_IBE_OBE		0x4
 
 #define IOMUXC_CONFIG_SION	(0x1 << 4)
 

drivers/pinctrl/nxp/pinctrl-imx7ulp.c

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ *
+ * Peng Fan <peng.fan@nxp.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <dm/device.h>
+#include <dm/pinctrl.h>
+
+#include "pinctrl-imx.h"
+
+static struct imx_pinctrl_soc_info imx7ulp_pinctrl_soc_info = {
+	.flags = ZERO_OFFSET_VALID | SHARE_MUX_CONF_REG | CONFIG_IBE_OBE,
+};
+
+static int imx7ulp_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 imx7ulp_pinctrl_match[] = {
+	{ .compatible = "fsl,imx7ulp-iomuxc-0", .data = (ulong)&imx7ulp_pinctrl_soc_info },
+	{ .compatible = "fsl,imx7ulp-iomuxc-1", .data = (ulong)&imx7ulp_pinctrl_soc_info },
+	{ /* sentinel */ }
+};
+
+U_BOOT_DRIVER(imx7ulp_pinctrl) = {
+	.name = "imx7ulp-pinctrl",
+	.id = UCLASS_PINCTRL,
+	.of_match = of_match_ptr(imx7ulp_pinctrl_match),
+	.probe = imx7ulp_pinctrl_probe,
+	.remove = imx_pinctrl_remove,
+	.priv_auto_alloc_size = sizeof(struct imx_pinctrl_priv),
+	.ops = &imx_pinctrl_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};