--- /dev/null
+/*
+ * 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>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.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 "../core.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 */
+
+/**
+ * @dev: a pointer back to containing device
+ * @base: the offset to the controller in virtual memory
+ */
+struct imx_pinctrl {
+ struct device *dev;
+ struct pinctrl_dev *pctl;
+ void __iomem *base;
+ const struct imx_pinctrl_soc_info *info;
+};
+
+static const inline struct imx_pin_group *imx_pinctrl_find_group_by_name(
+ const struct imx_pinctrl_soc_info *info,
+ const char *name)
+{
+ const struct imx_pin_group *grp = NULL;
+ int i;
+
+ for (i = 0; i < info->ngroups; i++) {
+ if (!strcmp(info->groups[i].name, name)) {
+ grp = &info->groups[i];
+ break;
+ }
+ }
+
+ return grp;
+}
+
+static int imx_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+ const struct imx_pinctrl_soc_info *info = ipctl->info;
+
+ return info->ngroups;
+}
+
+static const char *imx_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned selector)
+{
+ struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+ const struct imx_pinctrl_soc_info *info = ipctl->info;
+
+ return info->groups[selector].name;
+}
+
+static int imx_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
+ const unsigned **pins,
+ unsigned *npins)
+{
+ struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+ const struct imx_pinctrl_soc_info *info = ipctl->info;
+
+ if (selector >= info->ngroups)
+ return -EINVAL;
+
+ *pins = info->groups[selector].pin_ids;
+ *npins = info->groups[selector].npins;
+
+ return 0;
+}
+
+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 imx_pinctrl_soc_info *info = ipctl->info;
+ const struct imx_pin_group *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(info, np->name);
+ if (!grp) {
+ dev_err(info->dev, "unable to find group for node %s\n",
+ np->name);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < grp->npins; i++) {
+ if (!(grp->pins[i].config & IMX_NO_PAD_CTL))
+ map_num++;
+ }
+
+ new_map = kmalloc(sizeof(struct pinctrl_map) * map_num, 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->npins; i++) {
+ if (!(grp->pins[i].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, grp->pins[i].pin);
+ new_map[j].data.configs.configs = &grp->pins[i].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 = imx_get_groups_count,
+ .get_group_name = imx_get_group_name,
+ .get_group_pins = imx_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 imx_pin_group *grp;
+
+ /*
+ * Configure the mux mode for each pin in the group for a specific
+ * function.
+ */
+ grp = &info->groups[group];
+ npins = grp->npins;
+
+ dev_dbg(ipctl->dev, "enable function %s group %s\n",
+ info->functions[selector].name, grp->name);
+
+ for (i = 0; i < npins; i++) {
+ struct imx_pin *pin = &grp->pins[i];
+ pin_id = pin->pin;
+ pin_reg = &info->pin_regs[pin_id];
+
+ if (pin_reg->mux_reg == -1) {
+ dev_err(ipctl->dev, "Pin(%s) does not support mux function\n",
+ info->pins[pin_id].name);
+ return -EINVAL;
+ }
+
+ if (info->flags & SHARE_MUX_CONF_REG) {
+ u32 reg;
+ reg = readl(ipctl->base + pin_reg->mux_reg);
+ reg &= ~(0x7 << 20);
+ reg |= (pin->mux_mode << 20);
+ writel(reg, ipctl->base + pin_reg->mux_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.
+ */
+ 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;
+}
+
+static int imx_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
+{
+ struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+ const struct imx_pinctrl_soc_info *info = ipctl->info;
+
+ return info->nfunctions;
+}
+
+static const char *imx_pmx_get_func_name(struct pinctrl_dev *pctldev,
+ unsigned selector)
+{
+ struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+ const struct imx_pinctrl_soc_info *info = ipctl->info;
+
+ return info->functions[selector].name;
+}
+
+static int imx_pmx_get_groups(struct pinctrl_dev *pctldev, unsigned selector,
+ const char * const **groups,
+ unsigned * const num_groups)
+{
+ struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+ const struct imx_pinctrl_soc_info *info = ipctl->info;
+
+ *groups = info->functions[selector].groups;
+ *num_groups = info->functions[selector].num_groups;
+
+ return 0;
+}
+
+static int imx_pmx_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range, unsigned offset)
+{
+ 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;
+ struct imx_pin_group *grp;
+ struct imx_pin *imx_pin;
+ unsigned int pin, group;
+ u32 reg;
+
+ /* Currently implementation only for shared mux/conf register */
+ if (!(info->flags & SHARE_MUX_CONF_REG))
+ return -EINVAL;
+
+ pin_reg = &info->pin_regs[offset];
+ if (pin_reg->mux_reg == -1)
+ return -EINVAL;
+
+ /* Find the pinctrl config with GPIO mux mode for the requested pin */
+ for (group = 0; group < info->ngroups; group++) {
+ grp = &info->groups[group];
+ for (pin = 0; pin < grp->npins; pin++) {
+ imx_pin = &grp->pins[pin];
+ if (imx_pin->pin == offset && !imx_pin->mux_mode)
+ goto mux_pin;
+ }
+ }
+
+ return -EINVAL;
+
+mux_pin:
+ reg = readl(ipctl->base + pin_reg->mux_reg);
+ reg &= ~(0x7 << 20);
+ reg |= imx_pin->config;
+ writel(reg, ipctl->base + pin_reg->mux_reg);
+
+ return 0;
+}
+
+static int imx_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range, unsigned offset, bool input)
+{
+ 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;
+ u32 reg;
+
+ /*
+ * Only Vybrid has the input/output buffer enable flags (IBE/OBE)
+ * They are part of the shared mux/conf register.
+ */
+ if (!(info->flags & SHARE_MUX_CONF_REG))
+ return -EINVAL;
+
+ pin_reg = &info->pin_regs[offset];
+ if (pin_reg->mux_reg == -1)
+ return -EINVAL;
+
+ /* IBE always enabled allows us to read the value "on the wire" */
+ reg = readl(ipctl->base + pin_reg->mux_reg);
+ if (input)
+ reg &= ~0x2;
+ else
+ reg |= 0x2;
+ writel(reg, ipctl->base + pin_reg->mux_reg);
+
+ return 0;
+}
+
+static const struct pinmux_ops imx_pmx_ops = {
+ .get_functions_count = imx_pmx_get_funcs_count,
+ .get_function_name = imx_pmx_get_func_name,
+ .get_function_groups = imx_pmx_get_groups,
+ .set_mux = imx_pmx_set,
+ .gpio_request_enable = imx_pmx_gpio_request_enable,
+ .gpio_set_direction = imx_pmx_gpio_set_direction,
+};
+
+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 = &info->pin_regs[pin_id];
+
+ if (pin_reg->conf_reg == -1) {
+ dev_err(info->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 &= 0xffff;
+
+ 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 = &info->pin_regs[pin_id];
+ int i;
+
+ if (pin_reg->conf_reg == -1) {
+ dev_err(info->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 &= ~0xffff;
+ reg |= configs[i];
+ writel(reg, ipctl->base + pin_reg->conf_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_pinctrl_soc_info *info = ipctl->info;
+ const struct imx_pin_reg *pin_reg = &info->pin_regs[pin_id];
+ unsigned long config;
+
+ if (!pin_reg || pin_reg->conf_reg == -1) {
+ seq_printf(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 imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+ const struct imx_pinctrl_soc_info *info = ipctl->info;
+ struct imx_pin_group *grp;
+ unsigned long config;
+ const char *name;
+ int i, ret;
+
+ if (group > info->ngroups)
+ return;
+
+ seq_printf(s, "\n");
+ grp = &info->groups[group];
+ for (i = 0; i < grp->npins; i++) {
+ struct imx_pin *pin = &grp->pins[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", 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,
+};
+
+static struct pinctrl_desc imx_pinctrl_desc = {
+ .pctlops = &imx_pctrl_ops,
+ .pmxops = &imx_pmx_ops,
+ .confops = &imx_pinconf_ops,
+ .owner = THIS_MODULE,
+};
+
+/*
+ * Each pin represented in fsl,pins consists of 5 u32 PIN_FUNC_ID and
+ * 1 u32 CONFIG, so 24 types in total for each pin.
+ */
+#define FSL_PIN_SIZE 24
+#define SHARE_FSL_PIN_SIZE 20
+
+static int imx_pinctrl_parse_groups(struct device_node *np,
+ struct imx_pin_group *grp,
+ struct imx_pinctrl_soc_info *info,
+ u32 index)
+{
+ int size, pin_size;
+ const __be32 *list;
+ int i;
+ u32 config;
+
+ dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
+
+ if (info->flags & SHARE_MUX_CONF_REG)
+ pin_size = SHARE_FSL_PIN_SIZE;
+ else
+ pin_size = FSL_PIN_SIZE;
+ /* Initialise group */
+ grp->name = np->name;
+
+ /*
+ * the binding format is fsl,pins = <PIN_FUNC_ID CONFIG ...>,
+ * do sanity check and calculate pins number
+ */
+ list = of_get_property(np, "fsl,pins", &size);
+ if (!list) {
+ dev_err(info->dev, "no fsl,pins property in node %s\n", np->full_name);
+ return -EINVAL;
+ }
+
+ /* we do not check return since it's safe node passed down */
+ if (!size || size % pin_size) {
+ dev_err(info->dev, "Invalid fsl,pins property in node %s\n", np->full_name);
+ return -EINVAL;
+ }
+
+ grp->npins = size / pin_size;
+ grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(struct imx_pin),
+ GFP_KERNEL);
+ grp->pin_ids = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
+ GFP_KERNEL);
+ if (!grp->pins || ! grp->pin_ids)
+ return -ENOMEM;
+
+ for (i = 0; i < grp->npins; 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 = &grp->pins[i];
+
+ 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 ? mux_reg / 4 : conf_reg / 4;
+ pin_reg = &info->pin_regs[pin_id];
+ pin->pin = pin_id;
+ grp->pin_ids[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++);
+
+ /* SION bit is in mux register */
+ config = be32_to_cpu(*list++);
+ if (config & IMX_PAD_SION)
+ pin->mux_mode |= IOMUXC_CONFIG_SION;
+ pin->config = config & ~IMX_PAD_SION;
+
+ dev_dbg(info->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_soc_info *info,
+ u32 index)
+{
+ struct device_node *child;
+ struct imx_pmx_func *func;
+ struct imx_pin_group *grp;
+ static u32 grp_index;
+ u32 i = 0;
+
+ dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
+
+ func = &info->functions[index];
+
+ /* Initialise function */
+ func->name = np->name;
+ func->num_groups = of_get_child_count(np);
+ if (func->num_groups == 0) {
+ dev_err(info->dev, "no groups defined in %s\n", np->full_name);
+ return -EINVAL;
+ }
+ func->groups = devm_kzalloc(info->dev,
+ func->num_groups * sizeof(char *), GFP_KERNEL);
+
+ for_each_child_of_node(np, child) {
+ func->groups[i] = child->name;
+ grp = &info->groups[grp_index++];
+ imx_pinctrl_parse_groups(child, grp, info, i++);
+ }
+
+ return 0;
+}
+
+static int imx_pinctrl_probe_dt(struct platform_device *pdev,
+ struct imx_pinctrl_soc_info *info)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *child;
+ u32 nfuncs = 0;
+ u32 i = 0;
+
+ if (!np)
+ return -ENODEV;
+
+ nfuncs = of_get_child_count(np);
+ if (nfuncs <= 0) {
+ dev_err(&pdev->dev, "no functions defined\n");
+ return -EINVAL;
+ }
+
+ info->nfunctions = nfuncs;
+ info->functions = devm_kzalloc(&pdev->dev, nfuncs * sizeof(struct imx_pmx_func),
+ GFP_KERNEL);
+ if (!info->functions)
+ return -ENOMEM;
+
+ info->ngroups = 0;
+ for_each_child_of_node(np, child)
+ info->ngroups += of_get_child_count(child);
+ info->groups = devm_kzalloc(&pdev->dev, info->ngroups * sizeof(struct imx_pin_group),
+ GFP_KERNEL);
+ if (!info->groups)
+ return -ENOMEM;
+
+ for_each_child_of_node(np, child)
+ imx_pinctrl_parse_functions(child, info, i++);
+
+ return 0;
+}
+
+int imx_pinctrl_probe(struct platform_device *pdev,
+ struct imx_pinctrl_soc_info *info)
+{
+ struct imx_pinctrl *ipctl;
+ struct resource *res;
+ int ret, i;
+
+ if (!info || !info->pins || !info->npins) {
+ dev_err(&pdev->dev, "wrong pinctrl info\n");
+ return -EINVAL;
+ }
+ info->dev = &pdev->dev;
+
+ /* Create state holders etc for this driver */
+ ipctl = devm_kzalloc(&pdev->dev, sizeof(*ipctl), GFP_KERNEL);
+ if (!ipctl)
+ return -ENOMEM;
+
+ info->pin_regs = devm_kmalloc(&pdev->dev, sizeof(*info->pin_regs) *
+ info->npins, GFP_KERNEL);
+ if (!info->pin_regs)
+ return -ENOMEM;
+
+ for (i = 0; i < info->npins; i++) {
+ info->pin_regs[i].mux_reg = -1;
+ info->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);
+
+ imx_pinctrl_desc.name = dev_name(&pdev->dev);
+ imx_pinctrl_desc.pins = info->pins;
+ imx_pinctrl_desc.npins = info->npins;
+
+ ret = imx_pinctrl_probe_dt(pdev, info);
+ if (ret) {
+ dev_err(&pdev->dev, "fail to probe dt properties\n");
+ return ret;
+ }
+
+ ipctl->info = info;
+ ipctl->dev = info->dev;
+ platform_set_drvdata(pdev, ipctl);
+ ipctl->pctl = pinctrl_register(&imx_pinctrl_desc, &pdev->dev, ipctl);
+ if (!ipctl->pctl) {
+ dev_err(&pdev->dev, "could not register IMX pinctrl driver\n");
+ return -EINVAL;
+ }
+
+ dev_info(&pdev->dev, "initialized IMX pinctrl driver\n");
+
+ return 0;
+}
+
+int imx_pinctrl_remove(struct platform_device *pdev)
+{
+ struct imx_pinctrl *ipctl = platform_get_drvdata(pdev);
+
+ pinctrl_unregister(ipctl->pctl);
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff