Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 767 insertions, 0 deletions

diff --git a/drivers/pinctrl/freescale/pinctrl-imx.c b/drivers/pinctrl/freescale/pinctrl-imx.c
new file mode 100644
index 000000000..90d414dd7
--- /dev/null
+++ b/drivers/pinctrl/freescale/pinctrl-imx.c
@@ -0,0 +1,767 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Core driver for the imx pin controller
+//
+// Copyright (C) 2012 Freescale Semiconductor, Inc.
+// Copyright (C) 2012 Linaro Ltd.
+//
+// Author: Dong Aisheng <dong.aisheng@linaro.org>
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+
+#include "../core.h"
+#include "../pinconf.h"
+#include "../pinmux.h"
+#include "pinctrl-imx.h"
+
+/* The bits in CONFIG cell defined in binding doc*/
+#define IMX_NO_PAD_CTL	0x80000000	/* no pin config need */
+#define IMX_PAD_SION 0x40000000		/* set SION */
+
+static inline const struct group_desc *imx_pinctrl_find_group_by_name(
+				struct pinctrl_dev *pctldev,
+				const char *name)
+{
+	const struct group_desc *grp = NULL;
+	int i;
+
+	for (i = 0; i < pctldev->num_groups; i++) {
+		grp = pinctrl_generic_get_group(pctldev, i);
+		if (grp && !strcmp(grp->name, name))
+			break;
+	}
+
+	return grp;
+}
+
+static void imx_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+		   unsigned offset)
+{
+	seq_printf(s, "%s", dev_name(pctldev->dev));
+}
+
+static int imx_dt_node_to_map(struct pinctrl_dev *pctldev,
+			struct device_node *np,
+			struct pinctrl_map **map, unsigned *num_maps)
+{
+	struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+	const struct group_desc *grp;
+	struct pinctrl_map *new_map;
+	struct device_node *parent;
+	int map_num = 1;
+	int i, j;
+
+	/*
+	 * first find the group of this node and check if we need create
+	 * config maps for pins
+	 */
+	grp = imx_pinctrl_find_group_by_name(pctldev, np->name);
+	if (!grp) {
+		dev_err(ipctl->dev, "unable to find group for node %s\n",
+			np->name);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < grp->num_pins; i++) {
+		struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
+
+		if (!(pin->config & IMX_NO_PAD_CTL))
+			map_num++;
+	}
+
+	new_map = kmalloc_array(map_num, sizeof(struct pinctrl_map),
+				GFP_KERNEL);
+	if (!new_map)
+		return -ENOMEM;
+
+	*map = new_map;
+	*num_maps = map_num;
+
+	/* create mux map */
+	parent = of_get_parent(np);
+	if (!parent) {
+		kfree(new_map);
+		return -EINVAL;
+	}
+	new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
+	new_map[0].data.mux.function = parent->name;
+	new_map[0].data.mux.group = np->name;
+	of_node_put(parent);
+
+	/* create config map */
+	new_map++;
+	for (i = j = 0; i < grp->num_pins; i++) {
+		struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
+
+		if (!(pin->config & IMX_NO_PAD_CTL)) {
+			new_map[j].type = PIN_MAP_TYPE_CONFIGS_PIN;
+			new_map[j].data.configs.group_or_pin =
+					pin_get_name(pctldev, pin->pin);
+			new_map[j].data.configs.configs = &pin->config;
+			new_map[j].data.configs.num_configs = 1;
+			j++;
+		}
+	}
+
+	dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
+		(*map)->data.mux.function, (*map)->data.mux.group, map_num);
+
+	return 0;
+}
+
+static void imx_dt_free_map(struct pinctrl_dev *pctldev,
+				struct pinctrl_map *map, unsigned num_maps)
+{
+	kfree(map);
+}
+
+static const struct pinctrl_ops imx_pctrl_ops = {
+	.get_groups_count = pinctrl_generic_get_group_count,
+	.get_group_name = pinctrl_generic_get_group_name,
+	.get_group_pins = pinctrl_generic_get_group_pins,
+	.pin_dbg_show = imx_pin_dbg_show,
+	.dt_node_to_map = imx_dt_node_to_map,
+	.dt_free_map = imx_dt_free_map,
+
+};
+
+static int imx_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
+		       unsigned group)
+{
+	struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+	const struct imx_pinctrl_soc_info *info = ipctl->info;
+	const struct imx_pin_reg *pin_reg;
+	unsigned int npins, pin_id;
+	int i;
+	struct group_desc *grp = NULL;
+	struct function_desc *func = NULL;
+
+	/*
+	 * Configure the mux mode for each pin in the group for a specific
+	 * function.
+	 */
+	grp = pinctrl_generic_get_group(pctldev, group);
+	if (!grp)
+		return -EINVAL;
+
+	func = pinmux_generic_get_function(pctldev, selector);
+	if (!func)
+		return -EINVAL;
+
+	npins = grp->num_pins;
+
+	dev_dbg(ipctl->dev, "enable function %s group %s\n",
+		func->name, grp->name);
+
+	for (i = 0; i < npins; i++) {
+		struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
+
+		pin_id = pin->pin;
+		pin_reg = &ipctl->pin_regs[pin_id];
+
+		if (pin_reg->mux_reg == -1) {
+			dev_dbg(ipctl->dev, "Pin(%s) does not support mux function\n",
+				info->pins[pin_id].name);
+			continue;
+		}
+
+		if (info->flags & SHARE_MUX_CONF_REG) {
+			u32 reg;
+			reg = readl(ipctl->base + pin_reg->mux_reg);
+			reg &= ~info->mux_mask;
+			reg |= (pin->mux_mode << info->mux_shift);
+			writel(reg, ipctl->base + pin_reg->mux_reg);
+			dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
+				pin_reg->mux_reg, reg);
+		} else {
+			writel(pin->mux_mode, ipctl->base + pin_reg->mux_reg);
+			dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
+				pin_reg->mux_reg, pin->mux_mode);
+		}
+
+		/*
+		 * If the select input value begins with 0xff, it's a quirky
+		 * select input and the value should be interpreted as below.
+		 *     31     23      15      7        0
+		 *     | 0xff | shift | width | select |
+		 * It's used to work around the problem that the select
+		 * input for some pin is not implemented in the select
+		 * input register but in some general purpose register.
+		 * We encode the select input value, width and shift of
+		 * the bit field into input_val cell of pin function ID
+		 * in device tree, and then decode them here for setting
+		 * up the select input bits in general purpose register.
+		 */
+		if (pin->input_val >> 24 == 0xff) {
+			u32 val = pin->input_val;
+			u8 select = val & 0xff;
+			u8 width = (val >> 8) & 0xff;
+			u8 shift = (val >> 16) & 0xff;
+			u32 mask = ((1 << width) - 1) << shift;
+			/*
+			 * The input_reg[i] here is actually some IOMUXC general
+			 * purpose register, not regular select input register.
+			 */
+			val = readl(ipctl->base + pin->input_reg);
+			val &= ~mask;
+			val |= select << shift;
+			writel(val, ipctl->base + pin->input_reg);
+		} else if (pin->input_reg) {
+			/*
+			 * Regular select input register can never be at offset
+			 * 0, and we only print register value for regular case.
+			 */
+			if (ipctl->input_sel_base)
+				writel(pin->input_val, ipctl->input_sel_base +
+						pin->input_reg);
+			else
+				writel(pin->input_val, ipctl->base +
+						pin->input_reg);
+			dev_dbg(ipctl->dev,
+				"==>select_input: offset 0x%x val 0x%x\n",
+				pin->input_reg, pin->input_val);
+		}
+	}
+
+	return 0;
+}
+
+struct pinmux_ops imx_pmx_ops = {
+	.get_functions_count = pinmux_generic_get_function_count,
+	.get_function_name = pinmux_generic_get_function_name,
+	.get_function_groups = pinmux_generic_get_function_groups,
+	.set_mux = imx_pmx_set,
+};
+
+/* decode generic config into raw register values */
+static u32 imx_pinconf_decode_generic_config(struct imx_pinctrl *ipctl,
+					      unsigned long *configs,
+					      unsigned int num_configs)
+{
+	const struct imx_pinctrl_soc_info *info = ipctl->info;
+	const struct imx_cfg_params_decode *decode;
+	enum pin_config_param param;
+	u32 raw_config = 0;
+	u32 param_val;
+	int i, j;
+
+	WARN_ON(num_configs > info->num_decodes);
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		param_val = pinconf_to_config_argument(configs[i]);
+		decode = info->decodes;
+		for (j = 0; j < info->num_decodes; j++) {
+			if (param == decode->param) {
+				if (decode->invert)
+					param_val = !param_val;
+				raw_config |= (param_val << decode->shift)
+					      & decode->mask;
+				break;
+			}
+			decode++;
+		}
+	}
+
+	if (info->fixup)
+		info->fixup(configs, num_configs, &raw_config);
+
+	return raw_config;
+}
+
+static u32 imx_pinconf_parse_generic_config(struct device_node *np,
+					    struct imx_pinctrl *ipctl)
+{
+	const struct imx_pinctrl_soc_info *info = ipctl->info;
+	struct pinctrl_dev *pctl = ipctl->pctl;
+	unsigned int num_configs;
+	unsigned long *configs;
+	int ret;
+
+	if (!info->generic_pinconf)
+		return 0;
+
+	ret = pinconf_generic_parse_dt_config(np, pctl, &configs,
+					      &num_configs);
+	if (ret)
+		return 0;
+
+	return imx_pinconf_decode_generic_config(ipctl, configs, num_configs);
+}
+
+static int imx_pinconf_get(struct pinctrl_dev *pctldev,
+			     unsigned pin_id, unsigned long *config)
+{
+	struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+	const struct imx_pinctrl_soc_info *info = ipctl->info;
+	const struct imx_pin_reg *pin_reg = &ipctl->pin_regs[pin_id];
+
+	if (pin_reg->conf_reg == -1) {
+		dev_err(ipctl->dev, "Pin(%s) does not support config function\n",
+			info->pins[pin_id].name);
+		return -EINVAL;
+	}
+
+	*config = readl(ipctl->base + pin_reg->conf_reg);
+
+	if (info->flags & SHARE_MUX_CONF_REG)
+		*config &= ~info->mux_mask;
+
+	return 0;
+}
+
+static int imx_pinconf_set(struct pinctrl_dev *pctldev,
+			     unsigned pin_id, unsigned long *configs,
+			     unsigned num_configs)
+{
+	struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+	const struct imx_pinctrl_soc_info *info = ipctl->info;
+	const struct imx_pin_reg *pin_reg = &ipctl->pin_regs[pin_id];
+	int i;
+
+	if (pin_reg->conf_reg == -1) {
+		dev_err(ipctl->dev, "Pin(%s) does not support config function\n",
+			info->pins[pin_id].name);
+		return -EINVAL;
+	}
+
+	dev_dbg(ipctl->dev, "pinconf set pin %s\n",
+		info->pins[pin_id].name);
+
+	for (i = 0; i < num_configs; i++) {
+		if (info->flags & SHARE_MUX_CONF_REG) {
+			u32 reg;
+			reg = readl(ipctl->base + pin_reg->conf_reg);
+			reg &= info->mux_mask;
+			reg |= configs[i];
+			writel(reg, ipctl->base + pin_reg->conf_reg);
+			dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
+				pin_reg->conf_reg, reg);
+		} else {
+			writel(configs[i], ipctl->base + pin_reg->conf_reg);
+			dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%lx\n",
+				pin_reg->conf_reg, configs[i]);
+		}
+	} /* for each config */
+
+	return 0;
+}
+
+static void imx_pinconf_dbg_show(struct pinctrl_dev *pctldev,
+				   struct seq_file *s, unsigned pin_id)
+{
+	struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+	const struct imx_pin_reg *pin_reg = &ipctl->pin_regs[pin_id];
+	unsigned long config;
+
+	if (!pin_reg || pin_reg->conf_reg == -1) {
+		seq_puts(s, "N/A");
+		return;
+	}
+
+	config = readl(ipctl->base + pin_reg->conf_reg);
+	seq_printf(s, "0x%lx", config);
+}
+
+static void imx_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
+					 struct seq_file *s, unsigned group)
+{
+	struct group_desc *grp;
+	unsigned long config;
+	const char *name;
+	int i, ret;
+
+	if (group >= pctldev->num_groups)
+		return;
+
+	seq_puts(s, "\n");
+	grp = pinctrl_generic_get_group(pctldev, group);
+	if (!grp)
+		return;
+
+	for (i = 0; i < grp->num_pins; i++) {
+		struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
+
+		name = pin_get_name(pctldev, pin->pin);
+		ret = imx_pinconf_get(pctldev, pin->pin, &config);
+		if (ret)
+			return;
+		seq_printf(s, "  %s: 0x%lx\n", name, config);
+	}
+}
+
+static const struct pinconf_ops imx_pinconf_ops = {
+	.pin_config_get = imx_pinconf_get,
+	.pin_config_set = imx_pinconf_set,
+	.pin_config_dbg_show = imx_pinconf_dbg_show,
+	.pin_config_group_dbg_show = imx_pinconf_group_dbg_show,
+};
+
+/*
+ * Each pin represented in fsl,pins consists of a number of u32 PIN_FUNC_ID
+ * and 1 u32 CONFIG, the total size is PIN_FUNC_ID + CONFIG for each pin.
+ * For generic_pinconf case, there's no extra u32 CONFIG.
+ *
+ * PIN_FUNC_ID format:
+ * Default:
+ *     <mux_reg conf_reg input_reg mux_mode input_val>
+ * SHARE_MUX_CONF_REG:
+ *     <mux_conf_reg input_reg mux_mode input_val>
+ */
+#define FSL_PIN_SIZE 24
+#define FSL_PIN_SHARE_SIZE 20
+
+static int imx_pinctrl_parse_groups(struct device_node *np,
+				    struct group_desc *grp,
+				    struct imx_pinctrl *ipctl,
+				    u32 index)
+{
+	const struct imx_pinctrl_soc_info *info = ipctl->info;
+	int size, pin_size;
+	const __be32 *list;
+	int i;
+	u32 config;
+
+	dev_dbg(ipctl->dev, "group(%d): %s\n", index, np->name);
+
+	if (info->flags & SHARE_MUX_CONF_REG)
+		pin_size = FSL_PIN_SHARE_SIZE;
+	else
+		pin_size = FSL_PIN_SIZE;
+
+	if (info->generic_pinconf)
+		pin_size -= 4;
+
+	/* Initialise group */
+	grp->name = np->name;
+
+	/*
+	 * the binding format is fsl,pins = <PIN_FUNC_ID CONFIG ...>,
+	 * do sanity check and calculate pins number
+	 *
+	 * First try legacy 'fsl,pins' property, then fall back to the
+	 * generic 'pinmux'.
+	 *
+	 * Note: for generic 'pinmux' case, there's no CONFIG part in
+	 * the binding format.
+	 */
+	list = of_get_property(np, "fsl,pins", &size);
+	if (!list) {
+		list = of_get_property(np, "pinmux", &size);
+		if (!list) {
+			dev_err(ipctl->dev,
+				"no fsl,pins and pins property in node %pOF\n", np);
+			return -EINVAL;
+		}
+	}
+
+	/* we do not check return since it's safe node passed down */
+	if (!size || size % pin_size) {
+		dev_err(ipctl->dev, "Invalid fsl,pins or pins property in node %pOF\n", np);
+		return -EINVAL;
+	}
+
+	/* first try to parse the generic pin config */
+	config = imx_pinconf_parse_generic_config(np, ipctl);
+
+	grp->num_pins = size / pin_size;
+	grp->data = devm_kcalloc(ipctl->dev,
+				 grp->num_pins, sizeof(struct imx_pin),
+				 GFP_KERNEL);
+	grp->pins = devm_kcalloc(ipctl->dev,
+				 grp->num_pins, sizeof(unsigned int),
+				 GFP_KERNEL);
+	if (!grp->pins || !grp->data)
+		return -ENOMEM;
+
+	for (i = 0; i < grp->num_pins; i++) {
+		u32 mux_reg = be32_to_cpu(*list++);
+		u32 conf_reg;
+		unsigned int pin_id;
+		struct imx_pin_reg *pin_reg;
+		struct imx_pin *pin = &((struct imx_pin *)(grp->data))[i];
+
+		if (!(info->flags & ZERO_OFFSET_VALID) && !mux_reg)
+			mux_reg = -1;
+
+		if (info->flags & SHARE_MUX_CONF_REG) {
+			conf_reg = mux_reg;
+		} else {
+			conf_reg = be32_to_cpu(*list++);
+			if (!conf_reg)
+				conf_reg = -1;
+		}
+
+		pin_id = (mux_reg != -1) ? mux_reg / 4 : conf_reg / 4;
+		pin_reg = &ipctl->pin_regs[pin_id];
+		pin->pin = pin_id;
+		grp->pins[i] = pin_id;
+		pin_reg->mux_reg = mux_reg;
+		pin_reg->conf_reg = conf_reg;
+		pin->input_reg = be32_to_cpu(*list++);
+		pin->mux_mode = be32_to_cpu(*list++);
+		pin->input_val = be32_to_cpu(*list++);
+
+		if (info->generic_pinconf) {
+			/* generic pin config decoded */
+			pin->config = config;
+		} else {
+			/* legacy pin config read from devicetree */
+			config = be32_to_cpu(*list++);
+
+			/* SION bit is in mux register */
+			if (config & IMX_PAD_SION)
+				pin->mux_mode |= IOMUXC_CONFIG_SION;
+			pin->config = config & ~IMX_PAD_SION;
+		}
+
+		dev_dbg(ipctl->dev, "%s: 0x%x 0x%08lx", info->pins[pin_id].name,
+				pin->mux_mode, pin->config);
+	}
+
+	return 0;
+}
+
+static int imx_pinctrl_parse_functions(struct device_node *np,
+				       struct imx_pinctrl *ipctl,
+				       u32 index)
+{
+	struct pinctrl_dev *pctl = ipctl->pctl;
+	struct device_node *child;
+	struct function_desc *func;
+	struct group_desc *grp;
+	u32 i = 0;
+
+	dev_dbg(pctl->dev, "parse function(%d): %s\n", index, np->name);
+
+	func = pinmux_generic_get_function(pctl, index);
+	if (!func)
+		return -EINVAL;
+
+	/* Initialise function */
+	func->name = np->name;
+	func->num_group_names = of_get_child_count(np);
+	if (func->num_group_names == 0) {
+		dev_err(ipctl->dev, "no groups defined in %pOF\n", np);
+		return -EINVAL;
+	}
+	func->group_names = devm_kcalloc(ipctl->dev, func->num_group_names,
+					 sizeof(char *), GFP_KERNEL);
+	if (!func->group_names)
+		return -ENOMEM;
+
+	for_each_child_of_node(np, child) {
+		func->group_names[i] = child->name;
+
+		grp = devm_kzalloc(ipctl->dev, sizeof(struct group_desc),
+				   GFP_KERNEL);
+		if (!grp)
+			return -ENOMEM;
+
+		mutex_lock(&ipctl->mutex);
+		radix_tree_insert(&pctl->pin_group_tree,
+				  ipctl->group_index++, grp);
+		mutex_unlock(&ipctl->mutex);
+
+		imx_pinctrl_parse_groups(child, grp, ipctl, i++);
+	}
+
+	return 0;
+}
+
+/*
+ * Check if the DT contains pins in the direct child nodes. This indicates the
+ * newer DT format to store pins. This function returns true if the first found
+ * fsl,pins property is in a child of np. Otherwise false is returned.
+ */
+static bool imx_pinctrl_dt_is_flat_functions(struct device_node *np)
+{
+	struct device_node *function_np;
+	struct device_node *pinctrl_np;
+
+	for_each_child_of_node(np, function_np) {
+		if (of_property_read_bool(function_np, "fsl,pins"))
+			return true;
+
+		for_each_child_of_node(function_np, pinctrl_np) {
+			if (of_property_read_bool(pinctrl_np, "fsl,pins"))
+				return false;
+		}
+	}
+
+	return true;
+}
+
+static int imx_pinctrl_probe_dt(struct platform_device *pdev,
+				struct imx_pinctrl *ipctl)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct device_node *child;
+	struct pinctrl_dev *pctl = ipctl->pctl;
+	u32 nfuncs = 0;
+	u32 i = 0;
+	bool flat_funcs;
+
+	if (!np)
+		return -ENODEV;
+
+	flat_funcs = imx_pinctrl_dt_is_flat_functions(np);
+	if (flat_funcs) {
+		nfuncs = 1;
+	} else {
+		nfuncs = of_get_child_count(np);
+		if (nfuncs == 0) {
+			dev_err(&pdev->dev, "no functions defined\n");
+			return -EINVAL;
+		}
+	}
+
+	for (i = 0; i < nfuncs; i++) {
+		struct function_desc *function;
+
+		function = devm_kzalloc(&pdev->dev, sizeof(*function),
+					GFP_KERNEL);
+		if (!function)
+			return -ENOMEM;
+
+		mutex_lock(&ipctl->mutex);
+		radix_tree_insert(&pctl->pin_function_tree, i, function);
+		mutex_unlock(&ipctl->mutex);
+	}
+	pctl->num_functions = nfuncs;
+
+	ipctl->group_index = 0;
+	if (flat_funcs) {
+		pctl->num_groups = of_get_child_count(np);
+	} else {
+		pctl->num_groups = 0;
+		for_each_child_of_node(np, child)
+			pctl->num_groups += of_get_child_count(child);
+	}
+
+	if (flat_funcs) {
+		imx_pinctrl_parse_functions(np, ipctl, 0);
+	} else {
+		i = 0;
+		for_each_child_of_node(np, child)
+			imx_pinctrl_parse_functions(child, ipctl, i++);
+	}
+
+	return 0;
+}
+
+int imx_pinctrl_probe(struct platform_device *pdev,
+		      const struct imx_pinctrl_soc_info *info)
+{
+	struct regmap_config config = { .name = "gpr" };
+	struct device_node *dev_np = pdev->dev.of_node;
+	struct pinctrl_desc *imx_pinctrl_desc;
+	struct device_node *np;
+	struct imx_pinctrl *ipctl;
+	struct resource *res;
+	struct regmap *gpr;
+	int ret, i;
+
+	if (!info || !info->pins || !info->npins) {
+		dev_err(&pdev->dev, "wrong pinctrl info\n");
+		return -EINVAL;
+	}
+
+	if (info->gpr_compatible) {
+		gpr = syscon_regmap_lookup_by_compatible(info->gpr_compatible);
+		if (!IS_ERR(gpr))
+			regmap_attach_dev(&pdev->dev, gpr, &config);
+	}
+
+	/* Create state holders etc for this driver */
+	ipctl = devm_kzalloc(&pdev->dev, sizeof(*ipctl), GFP_KERNEL);
+	if (!ipctl)
+		return -ENOMEM;
+
+	ipctl->pin_regs = devm_kmalloc_array(&pdev->dev,
+				       info->npins, sizeof(*ipctl->pin_regs),
+				       GFP_KERNEL);
+	if (!ipctl->pin_regs)
+		return -ENOMEM;
+
+	for (i = 0; i < info->npins; i++) {
+		ipctl->pin_regs[i].mux_reg = -1;
+		ipctl->pin_regs[i].conf_reg = -1;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ipctl->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(ipctl->base))
+		return PTR_ERR(ipctl->base);
+
+	if (of_property_read_bool(dev_np, "fsl,input-sel")) {
+		np = of_parse_phandle(dev_np, "fsl,input-sel", 0);
+		if (!np) {
+			dev_err(&pdev->dev, "iomuxc fsl,input-sel property not found\n");
+			return -EINVAL;
+		}
+
+		ipctl->input_sel_base = of_iomap(np, 0);
+		of_node_put(np);
+		if (!ipctl->input_sel_base) {
+			dev_err(&pdev->dev,
+				"iomuxc input select base address not found\n");
+			return -ENOMEM;
+		}
+	}
+
+	imx_pinctrl_desc = devm_kzalloc(&pdev->dev, sizeof(*imx_pinctrl_desc),
+					GFP_KERNEL);
+	if (!imx_pinctrl_desc)
+		return -ENOMEM;
+
+	imx_pinctrl_desc->name = dev_name(&pdev->dev);
+	imx_pinctrl_desc->pins = info->pins;
+	imx_pinctrl_desc->npins = info->npins;
+	imx_pinctrl_desc->pctlops = &imx_pctrl_ops;
+	imx_pinctrl_desc->pmxops = &imx_pmx_ops;
+	imx_pinctrl_desc->confops = &imx_pinconf_ops;
+	imx_pinctrl_desc->owner = THIS_MODULE;
+
+	/* for generic pinconf */
+	imx_pinctrl_desc->custom_params = info->custom_params;
+	imx_pinctrl_desc->num_custom_params = info->num_custom_params;
+
+	/* platform specific callback */
+	imx_pmx_ops.gpio_set_direction = info->gpio_set_direction;
+
+	mutex_init(&ipctl->mutex);
+
+	ipctl->info = info;
+	ipctl->dev = &pdev->dev;
+	platform_set_drvdata(pdev, ipctl);
+	ret = devm_pinctrl_register_and_init(&pdev->dev,
+					     imx_pinctrl_desc, ipctl,
+					     &ipctl->pctl);
+	if (ret) {
+		dev_err(&pdev->dev, "could not register IMX pinctrl driver\n");
+		return ret;
+	}
+
+	ret = imx_pinctrl_probe_dt(pdev, ipctl);
+	if (ret) {
+		dev_err(&pdev->dev, "fail to probe dt properties\n");
+		return ret;
+	}
+
+	dev_info(&pdev->dev, "initialized IMX pinctrl driver\n");
+
+	return pinctrl_enable(ipctl->pctl);
+}