--- /dev/null
+* Freescale IOMUX Controller (IOMUXC) for i.MX
+
+The IOMUX Controller (IOMUXC), together with the IOMUX, enables the IC
+to share one PAD to several functional blocks. The sharing is done by
+multiplexing the PAD input/output signals. For each PAD there are up to
+8 muxing options (called ALT modes). Since different modules require
+different PAD settings (like pull up, keeper, etc) the IOMUXC controls
+also the PAD settings parameters.
+
+Please refer to pinctrl-bindings.txt in this directory for details of the
+common pinctrl bindings used by client devices, including the meaning of the
+phrase "pin configuration node".
+
+Freescale IMX pin configuration node is a node of a group of pins which can be
+used for a specific device or function. This node represents both mux and config
+of the pins in that group. The 'mux' selects the function mode(also named mux
+mode) this pin can work on and the 'config' configures various pad settings
+such as pull-up, open drain, drive strength, etc.
+
+Required properties for iomux controller:
+- compatible: "fsl,<soc>-iomuxc"
+ Please refer to each fsl,<soc>-pinctrl.txt binding doc for supported SoCs.
+
+Required properties for pin configuration node:
+- fsl,pins: two integers array, represents a group of pins mux and config
+ setting. The format is fsl,pins = <PIN_FUNC_ID CONFIG>, PIN_FUNC_ID is a
+ pin working on a specific function, CONFIG is the pad setting value like
+ pull-up on this pin. Please refer to fsl,<soc>-pinctrl.txt for the valid
+ pins and functions of each SoC.
+
+Bits used for CONFIG:
+NO_PAD_CTL(1 << 31): indicate this pin does not need config.
+
+SION(1 << 30): Software Input On Field.
+Force the selected mux mode input path no matter of MUX_MODE functionality.
+By default the input path is determined by functionality of the selected
+mux mode (regular).
+
+Other bits are used for PAD setting.
+Please refer to each fsl,<soc>-pinctrl,txt binding doc for SoC specific part
+of bits definitions.
+
+NOTE:
+Some requirements for using fsl,imx-pinctrl binding:
+1. We have pin function node defined under iomux controller node to represent
+ what pinmux functions this SoC supports.
+2. The pin configuration node intends to work on a specific function should
+ to be defined under that specific function node.
+ The function node's name should represent well about what function
+ this group of pins in this pin configuration node are working on.
+3. The driver can use the function node's name and pin configuration node's
+ name describe the pin function and group hierarchy.
+ For example, Linux IMX pinctrl driver takes the function node's name
+ as the function name and pin configuration node's name as group name to
+ create the map table.
+4. Each pin configuration node should have a phandle, devices can set pins
+ configurations by referring to the phandle of that pin configuration node.
+
+Examples:
+usdhc@0219c000 { /* uSDHC4 */
+ fsl,card-wired;
+ vmmc-supply = <®_3p3v>;
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_usdhc4_1>;
+};
+
+iomuxc@020e0000 {
+ compatible = "fsl,imx6q-iomuxc";
+ reg = <0x020e0000 0x4000>;
+
+ /* shared pinctrl settings */
+ usdhc4 {
+ pinctrl_usdhc4_1: usdhc4grp-1 {
+ fsl,pins = <1386 0x17059 /* MX6Q_PAD_SD4_CMD__USDHC4_CMD */
+ 1392 0x10059 /* MX6Q_PAD_SD4_CLK__USDHC4_CLK */
+ 1462 0x17059 /* MX6Q_PAD_SD4_DAT0__USDHC4_DAT0 */
+ 1470 0x17059 /* MX6Q_PAD_SD4_DAT1__USDHC4_DAT1 */
+ 1478 0x17059 /* MX6Q_PAD_SD4_DAT2__USDHC4_DAT2 */
+ 1486 0x17059 /* MX6Q_PAD_SD4_DAT3__USDHC4_DAT3 */
+ 1493 0x17059 /* MX6Q_PAD_SD4_DAT4__USDHC4_DAT4 */
+ 1501 0x17059 /* MX6Q_PAD_SD4_DAT5__USDHC4_DAT5 */
+ 1509 0x17059 /* MX6Q_PAD_SD4_DAT6__USDHC4_DAT6 */
+ 1517 0x17059>; /* MX6Q_PAD_SD4_DAT7__USDHC4_DAT7 */
+ };
+ };
+ ....
+};
+Refer to the IOMUXC controller chapter in imx6q datasheet,
+0x17059 means enable hysteresis, 47KOhm Pull Up, 50Mhz speed,
+80Ohm driver strength and Fast Slew Rate.
+User should refer to each SoC spec to set the correct value.
+
+TODO: when dtc macro support is available, we can change above raw data
+to dt macro which can get better readability in dts file.
--- /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"
+
+#define IMX_PMX_DUMP(info, p, m, c, n) \
+{ \
+ int i, j; \
+ printk("Format: Pin Mux Config\n"); \
+ for (i = 0; i < n; i++) { \
+ j = p[i]; \
+ printk("%s %d 0x%lx\n", \
+ info->pins[j].name, \
+ m[i], c[i]); \
+ } \
+}
+
+/* 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 struct imx_pin_reg *imx_find_pin_reg(
+ const struct imx_pinctrl_soc_info *info,
+ unsigned pin, bool is_mux, unsigned mux)
+{
+ const struct imx_pin_reg *pin_reg = NULL;
+ int i;
+
+ for (i = 0; i < info->npin_regs; i++) {
+ pin_reg = &info->pin_regs[i];
+ if (pin_reg->pid != pin)
+ continue;
+ if (!is_mux)
+ break;
+ else if (pin_reg->mux_mode == (mux & IMX_MUX_MASK))
+ break;
+ }
+
+ if (!pin_reg) {
+ dev_err(info->dev, "Pin(%s): unable to find pin reg map\n",
+ info->pins[pin].name);
+ return NULL;
+ }
+
+ return pin_reg;
+}
+
+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].pins;
+ *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;
+
+ /*
+ * 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->configs[i] & 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)
+ 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 = 0; i < grp->npins; i++) {
+ if (!(grp->configs[i] & IMX_NO_PAD_CTL)) {
+ new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
+ new_map[i].data.configs.group_or_pin =
+ pin_get_name(pctldev, grp->pins[i]);
+ new_map[i].data.configs.configs = &grp->configs[i];
+ new_map[i].data.configs.num_configs = 1;
+ }
+ }
+
+ dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
+ new_map->data.mux.function, new_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)
+{
+ int i;
+
+ for (i = 0; i < num_maps; i++)
+ kfree(map);
+}
+
+static 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_enable(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;
+ const unsigned *pins, *mux;
+ unsigned int npins, pin_id;
+ int i;
+
+ /*
+ * Configure the mux mode for each pin in the group for a specific
+ * function.
+ */
+ pins = info->groups[group].pins;
+ npins = info->groups[group].npins;
+ mux = info->groups[group].mux_mode;
+
+ WARN_ON(!pins || !npins || !mux);
+
+ dev_dbg(ipctl->dev, "enable function %s group %s\n",
+ info->functions[selector].name, info->groups[group].name);
+
+ for (i = 0; i < npins; i++) {
+ pin_id = pins[i];
+
+ pin_reg = imx_find_pin_reg(info, pin_id, 1, mux[i]);
+ if (!pin_reg)
+ return -EINVAL;
+
+ if (!pin_reg->mux_reg) {
+ dev_err(ipctl->dev, "Pin(%s) does not support mux function\n",
+ info->pins[pin_id].name);
+ return -EINVAL;
+ }
+
+ writel(mux[i], ipctl->base + pin_reg->mux_reg);
+ dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n",
+ pin_reg->mux_reg, mux[i]);
+
+ /* some pins also need select input setting, set it if found */
+ if (pin_reg->input_reg) {
+ writel(pin_reg->input_val, ipctl->base + pin_reg->input_reg);
+ dev_dbg(ipctl->dev,
+ "==>select_input: offset 0x%x val 0x%x\n",
+ pin_reg->input_reg, pin_reg->input_val);
+ }
+ }
+
+ return 0;
+}
+
+static void imx_pmx_disable(struct pinctrl_dev *pctldev, unsigned func_selector,
+ unsigned group_selector)
+{
+ /* nothing to do here */
+}
+
+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 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,
+ .enable = imx_pmx_enable,
+ .disable = imx_pmx_disable,
+};
+
+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;
+
+ pin_reg = imx_find_pin_reg(info, pin_id, 0, 0);
+ if (!pin_reg)
+ return -EINVAL;
+
+ if (!pin_reg->conf_reg) {
+ 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);
+
+ return 0;
+}
+
+static int imx_pinconf_set(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;
+
+ pin_reg = imx_find_pin_reg(info, pin_id, 0, 0);
+ if (!pin_reg)
+ return -EINVAL;
+
+ if (!pin_reg->conf_reg) {
+ 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);
+
+ writel(config, ipctl->base + pin_reg->conf_reg);
+ dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%lx\n",
+ pin_reg->conf_reg, 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;
+ unsigned long config;
+
+ pin_reg = imx_find_pin_reg(info, pin_id, 0, 0);
+ if (!pin_reg || !pin_reg->conf_reg) {
+ 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++) {
+ name = pin_get_name(pctldev, grp->pins[i]);
+ ret = imx_pinconf_get(pctldev, grp->pins[i], &config);
+ if (ret)
+ return;
+ seq_printf(s, "%s: 0x%lx", name, config);
+ }
+}
+
+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,
+};
+
+/* decode pin id and mux from pin function id got from device tree*/
+static int imx_pinctrl_get_pin_id_and_mux(const struct imx_pinctrl_soc_info *info,
+ unsigned int pin_func_id, unsigned int *pin_id,
+ unsigned int *mux)
+{
+ if (pin_func_id > info->npin_regs)
+ return -EINVAL;
+
+ *pin_id = info->pin_regs[pin_func_id].pid;
+ *mux = info->pin_regs[pin_func_id].mux_mode;
+
+ return 0;
+}
+
+static int __devinit imx_pinctrl_parse_groups(struct device_node *np,
+ struct imx_pin_group *grp,
+ struct imx_pinctrl_soc_info *info,
+ u32 index)
+{
+ unsigned int pin_func_id;
+ int ret, size;
+ const const __be32 *list;
+ int i, j;
+ u32 config;
+
+ dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
+
+ /* 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);
+ /* we do not check return since it's safe node passed down */
+ size /= sizeof(*list);
+ if (!size || size % 2) {
+ dev_err(info->dev, "wrong pins number or pins and configs should be pairs\n");
+ return -EINVAL;
+ }
+
+ grp->npins = size / 2;
+ grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
+ GFP_KERNEL);
+ grp->mux_mode = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
+ GFP_KERNEL);
+ grp->configs = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned long),
+ GFP_KERNEL);
+ for (i = 0, j = 0; i < size; i += 2, j++) {
+ pin_func_id = be32_to_cpu(*list++);
+ ret = imx_pinctrl_get_pin_id_and_mux(info, pin_func_id,
+ &grp->pins[j], &grp->mux_mode[j]);
+ if (ret) {
+ dev_err(info->dev, "get invalid pin function id\n");
+ return -EINVAL;
+ }
+ /* SION bit is in mux register */
+ config = be32_to_cpu(*list++);
+ if (config & IMX_PAD_SION)
+ grp->mux_mode[j] |= IOMUXC_CONFIG_SION;
+ grp->configs[j] = config & ~IMX_PAD_SION;
+ }
+
+#ifdef DEBUG
+ IMX_PMX_DUMP(info, grp->pins, grp->mux_mode, grp->configs, grp->npins);
+#endif
+ return 0;
+}
+
+static int __devinit 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;
+ int ret;
+ 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\n");
+ 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++];
+ ret = imx_pinctrl_parse_groups(child, grp, info, i++);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __devinit 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;
+ int ret;
+ 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) {
+ ret = imx_pinctrl_parse_functions(child, info, i++);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to parse function\n");
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+int __devinit imx_pinctrl_probe(struct platform_device *pdev,
+ struct imx_pinctrl_soc_info *info)
+{
+ struct imx_pinctrl *ipctl;
+ struct resource *res;
+ int ret;
+
+ if (!info || !info->pins || !info->npins
+ || !info->pin_regs || !info->npin_regs) {
+ 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;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENOENT;
+
+ ipctl->base = devm_request_and_ioremap(&pdev->dev, res);
+ if (!ipctl->base)
+ return -EBUSY;
+
+ 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 __devexit imx_pinctrl_remove(struct platform_device *pdev)
+{
+ struct imx_pinctrl *ipctl = platform_get_drvdata(pdev);
+
+ pinctrl_unregister(ipctl->pctl);
+
+ return 0;
+}
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff