diff options
| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/fsl,imx-pinctrl.txt | 95 | ||||
| -rw-r--r-- | drivers/pinctrl/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/pinctrl/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pinctrl/pinctrl-imx.c | 627 | ||||
| -rw-r--r-- | drivers/pinctrl/pinctrl-imx.h | 106 |
5 files changed, 834 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/fsl,imx-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/fsl,imx-pinctrl.txt new file mode 100644 index 0000000..ab19e6b --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/fsl,imx-pinctrl.txt @@ -0,0 +1,95 @@ +* 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. diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index f73a5ea..aad2882 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -26,6 +26,11 @@ config DEBUG_PINCTRL help Say Y here to add some extra checks and diagnostics to PINCTRL calls. +config PINCTRL_IMX + bool + select PINMUX + select PINCONF + config PINCTRL_PXA3xx bool select PINMUX diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 8e3c95a..a01a97c 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -9,6 +9,7 @@ ifeq ($(CONFIG_OF),y) obj-$(CONFIG_PINCTRL) += devicetree.o endif obj-$(CONFIG_GENERIC_PINCONF) += pinconf-generic.o +obj-$(CONFIG_PINCTRL_IMX) += pinctrl-imx.o obj-$(CONFIG_PINCTRL_PXA3xx) += pinctrl-pxa3xx.o obj-$(CONFIG_PINCTRL_MMP2) += pinctrl-mmp2.o obj-$(CONFIG_PINCTRL_PXA168) += pinctrl-pxa168.o diff --git a/drivers/pinctrl/pinctrl-imx.c b/drivers/pinctrl/pinctrl-imx.c new file mode 100644 index 0000000..8faf613 --- /dev/null +++ b/drivers/pinctrl/pinctrl-imx.c @@ -0,0 +1,627 @@ +/* + * 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; +} diff --git a/drivers/pinctrl/pinctrl-imx.h b/drivers/pinctrl/pinctrl-imx.h new file mode 100644 index 0000000..9b65e78 --- /dev/null +++ b/drivers/pinctrl/pinctrl-imx.h @@ -0,0 +1,106 @@ +/* + * IMX pinmux core definitions + * + * 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. + */ + +#ifndef __DRIVERS_PINCTRL_IMX_H +#define __DRIVERS_PINCTRL_IMX_H + +struct platform_device; + +/** + * struct imx_pin_group - describes an IMX pin group + * @name: the name of this specific pin group + * @pins: an array of discrete physical pins used in this group, taken + * from the driver-local pin enumeration space + * @npins: the number of pins in this group array, i.e. the number of + * elements in .pins so we can iterate over that array + * @mux_mode: the mux mode for each pin in this group. The size of this + * array is the same as pins. + * @configs: the config for each pin in this group. The size of this + * array is the same as pins. + */ +struct imx_pin_group { + const char *name; + unsigned int *pins; + unsigned npins; + unsigned int *mux_mode; + unsigned long *configs; +}; + +/** + * struct imx_pmx_func - describes IMX pinmux functions + * @name: the name of this specific function + * @groups: corresponding pin groups + * @num_groups: the number of groups + */ +struct imx_pmx_func { + const char *name; + const char **groups; + unsigned num_groups; +}; + +/** + * struct imx_pin_reg - describe a pin reg map + * The last 3 members are used for select input setting + * @pid: pin id + * @mux_reg: mux register offset + * @conf_reg: config register offset + * @mux_mode: mux mode + * @input_reg: select input register offset for this mux if any + * 0 if no select input setting needed. + * @input_val: the value set to select input register + */ +struct imx_pin_reg { + u16 pid; + u16 mux_reg; + u16 conf_reg; + u8 mux_mode; + u16 input_reg; + u8 input_val; +}; + +struct imx_pinctrl_soc_info { + struct device *dev; + const struct pinctrl_pin_desc *pins; + unsigned int npins; + const struct imx_pin_reg *pin_regs; + unsigned int npin_regs; + struct imx_pin_group *groups; + unsigned int ngroups; + struct imx_pmx_func *functions; + unsigned int nfunctions; +}; + +#define NO_MUX 0x0 +#define NO_PAD 0x0 + +#define IMX_PIN_REG(id, conf, mux, mode, input, val) \ + { \ + .pid = id, \ + .conf_reg = conf, \ + .mux_reg = mux, \ + .mux_mode = mode, \ + .input_reg = input, \ + .input_val = val, \ + } + +#define IMX_PINCTRL_PIN(pin) PINCTRL_PIN(pin, #pin) + +#define PAD_CTL_MASK(len) ((1 << len) - 1) +#define IMX_MUX_MASK 0x7 +#define IOMUXC_CONFIG_SION (0x1 << 4) + +int imx_pinctrl_probe(struct platform_device *pdev, + struct imx_pinctrl_soc_info *info); +int imx_pinctrl_remove(struct platform_device *pdev); +#endif /* __DRIVERS_PINCTRL_IMX_H */ |