+++ /dev/null
-From 7adbe9a88c33c6e362a10b109d963b5500a21f00 Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Sun, 27 Jul 2014 09:34:05 +0100
-Subject: [PATCH 25/53] pinctrl: ralink: add pinctrl driver
-
-Signed-off-by: John Crispin <blogic@openwrt.org>
----
- arch/mips/Kconfig | 2 +
- drivers/pinctrl/Kconfig | 5 +
- drivers/pinctrl/Makefile | 1 +
- drivers/pinctrl/pinctrl-rt2880.c | 474 ++++++++++++++++++++++++++++++++++++++
- 4 files changed, 482 insertions(+)
- create mode 100644 drivers/pinctrl/pinctrl-rt2880.c
-
---- a/arch/mips/Kconfig
-+++ b/arch/mips/Kconfig
-@@ -629,6 +629,8 @@ config RALINK
- select CLKDEV_LOOKUP
- select ARCH_HAS_RESET_CONTROLLER
- select RESET_CONTROLLER
-+ select PINCTRL
-+ select PINCTRL_RT2880
-
- config SGI_IP22
- bool "SGI IP22 (Indy/Indigo2)"
---- a/drivers/pinctrl/Kconfig
-+++ b/drivers/pinctrl/Kconfig
-@@ -143,6 +143,11 @@ config PINCTRL_LPC18XX
- help
- Pinctrl driver for NXP LPC18xx/43xx System Control Unit (SCU).
-
-+config PINCTRL_RT2880
-+ bool
-+ depends on RALINK
-+ select PINMUX
-+
- config PINCTRL_FALCON
- bool
- depends on SOC_FALCON
---- a/drivers/pinctrl/Makefile
-+++ b/drivers/pinctrl/Makefile
-@@ -28,6 +28,7 @@ obj-$(CONFIG_PINCTRL_PALMAS) += pinctrl-
- obj-$(CONFIG_PINCTRL_PIC32) += pinctrl-pic32.o
- obj-$(CONFIG_PINCTRL_PISTACHIO) += pinctrl-pistachio.o
- obj-$(CONFIG_PINCTRL_ROCKCHIP) += pinctrl-rockchip.o
-+obj-$(CONFIG_PINCTRL_RT2880) += pinctrl-rt2880.o
- obj-$(CONFIG_PINCTRL_RZA1) += pinctrl-rza1.o
- obj-$(CONFIG_PINCTRL_SINGLE) += pinctrl-single.o
- obj-$(CONFIG_PINCTRL_SIRF) += sirf/
---- /dev/null
-+++ b/drivers/pinctrl/pinctrl-rt2880.c
-@@ -0,0 +1,472 @@
-+/*
-+ * linux/drivers/pinctrl/pinctrl-rt2880.c
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * publishhed by the Free Software Foundation.
-+ *
-+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/device.h>
-+#include <linux/io.h>
-+#include <linux/platform_device.h>
-+#include <linux/slab.h>
-+#include <linux/of.h>
-+#include <linux/pinctrl/pinctrl.h>
-+#include <linux/pinctrl/pinconf.h>
-+#include <linux/pinctrl/pinmux.h>
-+#include <linux/pinctrl/consumer.h>
-+#include <linux/pinctrl/machine.h>
-+
-+#include <asm/mach-ralink/ralink_regs.h>
-+#include <asm/mach-ralink/pinmux.h>
-+#include <asm/mach-ralink/mt7620.h>
-+
-+#include "core.h"
-+
-+#define SYSC_REG_GPIO_MODE 0x60
-+#define SYSC_REG_GPIO_MODE2 0x64
-+
-+struct rt2880_priv {
-+ struct device *dev;
-+
-+ struct pinctrl_pin_desc *pads;
-+ struct pinctrl_desc *desc;
-+
-+ struct rt2880_pmx_func **func;
-+ int func_count;
-+
-+ struct rt2880_pmx_group *groups;
-+ const char **group_names;
-+ int group_count;
-+
-+ uint8_t *gpio;
-+ int max_pins;
-+};
-+
-+static int rt2880_get_group_count(struct pinctrl_dev *pctrldev)
-+{
-+ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
-+
-+ return p->group_count;
-+}
-+
-+static const char *rt2880_get_group_name(struct pinctrl_dev *pctrldev,
-+ unsigned group)
-+{
-+ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
-+
-+ if (group >= p->group_count)
-+ return NULL;
-+
-+ return p->group_names[group];
-+}
-+
-+static int rt2880_get_group_pins(struct pinctrl_dev *pctrldev,
-+ unsigned group,
-+ const unsigned **pins,
-+ unsigned *num_pins)
-+{
-+ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
-+
-+ if (group >= p->group_count)
-+ return -EINVAL;
-+
-+ *pins = p->groups[group].func[0].pins;
-+ *num_pins = p->groups[group].func[0].pin_count;
-+
-+ return 0;
-+}
-+
-+static void rt2880_pinctrl_dt_free_map(struct pinctrl_dev *pctrldev,
-+ struct pinctrl_map *map, unsigned num_maps)
-+{
-+ int i;
-+
-+ for (i = 0; i < num_maps; i++)
-+ if (map[i].type == PIN_MAP_TYPE_CONFIGS_PIN ||
-+ map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
-+ kfree(map[i].data.configs.configs);
-+ kfree(map);
-+}
-+
-+static void rt2880_pinctrl_pin_dbg_show(struct pinctrl_dev *pctrldev,
-+ struct seq_file *s,
-+ unsigned offset)
-+{
-+ seq_printf(s, "ralink pio");
-+}
-+
-+static void rt2880_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctrldev,
-+ struct device_node *np,
-+ struct pinctrl_map **map)
-+{
-+ const char *function;
-+ int func = of_property_read_string(np, "function", &function);
-+ int grps = of_property_count_strings(np, "groups");
-+ int i;
-+
-+ if (func || !grps)
-+ return;
-+
-+ for (i = 0; i < grps; i++) {
-+ const char *group;
-+
-+ of_property_read_string_index(np, "groups", i, &group);
-+
-+ (*map)->type = PIN_MAP_TYPE_MUX_GROUP;
-+ (*map)->name = function;
-+ (*map)->data.mux.group = group;
-+ (*map)->data.mux.function = function;
-+ (*map)++;
-+ }
-+}
-+
-+static int rt2880_pinctrl_dt_node_to_map(struct pinctrl_dev *pctrldev,
-+ struct device_node *np_config,
-+ struct pinctrl_map **map,
-+ unsigned *num_maps)
-+{
-+ int max_maps = 0;
-+ struct pinctrl_map *tmp;
-+ struct device_node *np;
-+
-+ for_each_child_of_node(np_config, np) {
-+ int ret = of_property_count_strings(np, "groups");
-+
-+ if (ret >= 0)
-+ max_maps += ret;
-+ }
-+
-+ if (!max_maps)
-+ return -EINVAL;
-+
-+ *map = kzalloc(max_maps * sizeof(struct pinctrl_map), GFP_KERNEL);
-+ if (!*map)
-+ return -ENOMEM;
-+
-+ tmp = *map;
-+
-+ for_each_child_of_node(np_config, np)
-+ rt2880_pinctrl_dt_subnode_to_map(pctrldev, np, &tmp);
-+ *num_maps = max_maps;
-+
-+ return 0;
-+}
-+
-+static const struct pinctrl_ops rt2880_pctrl_ops = {
-+ .get_groups_count = rt2880_get_group_count,
-+ .get_group_name = rt2880_get_group_name,
-+ .get_group_pins = rt2880_get_group_pins,
-+ .pin_dbg_show = rt2880_pinctrl_pin_dbg_show,
-+ .dt_node_to_map = rt2880_pinctrl_dt_node_to_map,
-+ .dt_free_map = rt2880_pinctrl_dt_free_map,
-+};
-+
-+static int rt2880_pmx_func_count(struct pinctrl_dev *pctrldev)
-+{
-+ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
-+
-+ return p->func_count;
-+}
-+
-+static const char *rt2880_pmx_func_name(struct pinctrl_dev *pctrldev,
-+ unsigned func)
-+{
-+ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
-+
-+ return p->func[func]->name;
-+}
-+
-+static int rt2880_pmx_group_get_groups(struct pinctrl_dev *pctrldev,
-+ unsigned func,
-+ const char * const **groups,
-+ unsigned * const num_groups)
-+{
-+ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
-+
-+ if (p->func[func]->group_count == 1)
-+ *groups = &p->group_names[p->func[func]->groups[0]];
-+ else
-+ *groups = p->group_names;
-+
-+ *num_groups = p->func[func]->group_count;
-+
-+ return 0;
-+}
-+
-+static int rt2880_pmx_group_enable(struct pinctrl_dev *pctrldev,
-+ unsigned func,
-+ unsigned group)
-+{
-+ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
-+ u32 mode = 0;
-+ u32 reg = SYSC_REG_GPIO_MODE;
-+ int i;
-+ int shift;
-+
-+ /* dont allow double use */
-+ if (p->groups[group].enabled) {
-+ dev_err(p->dev, "%s is already enabled\n", p->groups[group].name);
-+ return -EBUSY;
-+ }
-+
-+ p->groups[group].enabled = 1;
-+ p->func[func]->enabled = 1;
-+
-+ shift = p->groups[group].shift;
-+ if (shift >= 32) {
-+ shift -= 32;
-+ reg = SYSC_REG_GPIO_MODE2;
-+ }
-+ mode = rt_sysc_r32(reg);
-+ mode &= ~(p->groups[group].mask << shift);
-+
-+ /* mark the pins as gpio */
-+ for (i = 0; i < p->groups[group].func[0].pin_count; i++)
-+ p->gpio[p->groups[group].func[0].pins[i]] = 1;
-+
-+ /* function 0 is gpio and needs special handling */
-+ if (func == 0) {
-+ mode |= p->groups[group].gpio << shift;
-+ } else {
-+ for (i = 0; i < p->func[func]->pin_count; i++)
-+ p->gpio[p->func[func]->pins[i]] = 0;
-+ mode |= p->func[func]->value << shift;
-+ }
-+ rt_sysc_w32(mode, reg);
-+
-+ return 0;
-+}
-+
-+static int rt2880_pmx_group_gpio_request_enable(struct pinctrl_dev *pctrldev,
-+ struct pinctrl_gpio_range *range,
-+ unsigned pin)
-+{
-+ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
-+
-+ if (!p->gpio[pin]) {
-+ dev_err(p->dev, "pin %d is not set to gpio mux\n", pin);
-+ return -EINVAL;
-+ }
-+
-+ return 0;
-+}
-+
-+static const struct pinmux_ops rt2880_pmx_group_ops = {
-+ .get_functions_count = rt2880_pmx_func_count,
-+ .get_function_name = rt2880_pmx_func_name,
-+ .get_function_groups = rt2880_pmx_group_get_groups,
-+ .set_mux = rt2880_pmx_group_enable,
-+ .gpio_request_enable = rt2880_pmx_group_gpio_request_enable,
-+};
-+
-+static struct pinctrl_desc rt2880_pctrl_desc = {
-+ .owner = THIS_MODULE,
-+ .name = "rt2880-pinmux",
-+ .pctlops = &rt2880_pctrl_ops,
-+ .pmxops = &rt2880_pmx_group_ops,
-+};
-+
-+static struct rt2880_pmx_func gpio_func = {
-+ .name = "gpio",
-+};
-+
-+static int rt2880_pinmux_index(struct rt2880_priv *p)
-+{
-+ struct rt2880_pmx_func **f;
-+ struct rt2880_pmx_group *mux = p->groups;
-+ int i, j, c = 0;
-+
-+ /* count the mux functions */
-+ while (mux->name) {
-+ p->group_count++;
-+ mux++;
-+ }
-+
-+ /* allocate the group names array needed by the gpio function */
-+ p->group_names = devm_kzalloc(p->dev, sizeof(char *) * p->group_count, GFP_KERNEL);
-+ if (!p->group_names)
-+ return -1;
-+
-+ for (i = 0; i < p->group_count; i++) {
-+ p->group_names[i] = p->groups[i].name;
-+ p->func_count += p->groups[i].func_count;
-+ }
-+
-+ /* we have a dummy function[0] for gpio */
-+ p->func_count++;
-+
-+ /* allocate our function and group mapping index buffers */
-+ f = p->func = devm_kzalloc(p->dev, sizeof(struct rt2880_pmx_func) * p->func_count, GFP_KERNEL);
-+ gpio_func.groups = devm_kzalloc(p->dev, sizeof(int) * p->group_count, GFP_KERNEL);
-+ if (!f || !gpio_func.groups)
-+ return -1;
-+
-+ /* add a backpointer to the function so it knows its group */
-+ gpio_func.group_count = p->group_count;
-+ for (i = 0; i < gpio_func.group_count; i++)
-+ gpio_func.groups[i] = i;
-+
-+ f[c] = &gpio_func;
-+ c++;
-+
-+ /* add remaining functions */
-+ for (i = 0; i < p->group_count; i++) {
-+ for (j = 0; j < p->groups[i].func_count; j++) {
-+ f[c] = &p->groups[i].func[j];
-+ f[c]->groups = devm_kzalloc(p->dev, sizeof(int), GFP_KERNEL);
-+ f[c]->groups[0] = i;
-+ f[c]->group_count = 1;
-+ c++;
-+ }
-+ }
-+ return 0;
-+}
-+
-+static int rt2880_pinmux_pins(struct rt2880_priv *p)
-+{
-+ int i, j;
-+
-+ /* loop over the functions and initialize the pins array. also work out the highest pin used */
-+ for (i = 0; i < p->func_count; i++) {
-+ int pin;
-+
-+ if (!p->func[i]->pin_count)
-+ continue;
-+
-+ p->func[i]->pins = devm_kzalloc(p->dev, sizeof(int) * p->func[i]->pin_count, GFP_KERNEL);
-+ for (j = 0; j < p->func[i]->pin_count; j++)
-+ p->func[i]->pins[j] = p->func[i]->pin_first + j;
-+
-+ pin = p->func[i]->pin_first + p->func[i]->pin_count;
-+ if (pin > p->max_pins)
-+ p->max_pins = pin;
-+ }
-+
-+ /* the buffer that tells us which pins are gpio */
-+ p->gpio = devm_kzalloc(p->dev,sizeof(uint8_t) * p->max_pins,
-+ GFP_KERNEL);
-+ /* the pads needed to tell pinctrl about our pins */
-+ p->pads = devm_kzalloc(p->dev,
-+ sizeof(struct pinctrl_pin_desc) * p->max_pins,
-+ GFP_KERNEL);
-+ if (!p->pads || !p->gpio ) {
-+ dev_err(p->dev, "Failed to allocate gpio data\n");
-+ return -ENOMEM;
-+ }
-+
-+ memset(p->gpio, 1, sizeof(uint8_t) * p->max_pins);
-+ for (i = 0; i < p->func_count; i++) {
-+ if (!p->func[i]->pin_count)
-+ continue;
-+
-+ for (j = 0; j < p->func[i]->pin_count; j++)
-+ p->gpio[p->func[i]->pins[j]] = 0;
-+ }
-+
-+ /* pin 0 is always a gpio */
-+ p->gpio[0] = 1;
-+
-+ /* set the pads */
-+ for (i = 0; i < p->max_pins; i++) {
-+ /* strlen("ioXY") + 1 = 5 */
-+ char *name = devm_kzalloc(p->dev, 5, GFP_KERNEL);
-+
-+ if (!name) {
-+ dev_err(p->dev, "Failed to allocate pad name\n");
-+ return -ENOMEM;
-+ }
-+ snprintf(name, 5, "io%d", i);
-+ p->pads[i].number = i;
-+ p->pads[i].name = name;
-+ }
-+ p->desc->pins = p->pads;
-+ p->desc->npins = p->max_pins;
-+
-+ return 0;
-+}
-+
-+static int rt2880_pinmux_probe(struct platform_device *pdev)
-+{
-+ struct rt2880_priv *p;
-+ struct pinctrl_dev *dev;
-+ struct device_node *np;
-+
-+ if (!rt2880_pinmux_data)
-+ return -ENOSYS;
-+
-+ /* setup the private data */
-+ p = devm_kzalloc(&pdev->dev, sizeof(struct rt2880_priv), GFP_KERNEL);
-+ if (!p)
-+ return -ENOMEM;
-+
-+ p->dev = &pdev->dev;
-+ p->desc = &rt2880_pctrl_desc;
-+ p->groups = rt2880_pinmux_data;
-+ platform_set_drvdata(pdev, p);
-+
-+ /* init the device */
-+ if (rt2880_pinmux_index(p)) {
-+ dev_err(&pdev->dev, "failed to load index\n");
-+ return -EINVAL;
-+ }
-+ if (rt2880_pinmux_pins(p)) {
-+ dev_err(&pdev->dev, "failed to load pins\n");
-+ return -EINVAL;
-+ }
-+ dev = pinctrl_register(p->desc, &pdev->dev, p);
-+ if (IS_ERR(dev))
-+ return PTR_ERR(dev);
-+
-+ /* finalize by adding gpio ranges for enables gpio controllers */
-+ for_each_compatible_node(np, NULL, "ralink,rt2880-gpio") {
-+ const __be32 *ngpio, *gpiobase;
-+ struct pinctrl_gpio_range *range;
-+ char *name;
-+
-+ if (!of_device_is_available(np))
-+ continue;
-+
-+ ngpio = of_get_property(np, "ralink,num-gpios", NULL);
-+ gpiobase = of_get_property(np, "ralink,gpio-base", NULL);
-+ if (!ngpio || !gpiobase) {
-+ dev_err(&pdev->dev, "failed to load chip info\n");
-+ return -EINVAL;
-+ }
-+
-+ range = devm_kzalloc(p->dev, sizeof(struct pinctrl_gpio_range) + 4, GFP_KERNEL);
-+ range->name = name = (char *) &range[1];
-+ sprintf(name, "pio");
-+ range->npins = __be32_to_cpu(*ngpio);
-+ range->base = __be32_to_cpu(*gpiobase);
-+ range->pin_base = range->base;
-+ pinctrl_add_gpio_range(dev, range);
-+ }
-+
-+ return 0;
-+}
-+
-+static const struct of_device_id rt2880_pinmux_match[] = {
-+ { .compatible = "ralink,rt2880-pinmux" },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(of, rt2880_pinmux_match);
-+
-+static struct platform_driver rt2880_pinmux_driver = {
-+ .probe = rt2880_pinmux_probe,
-+ .driver = {
-+ .name = "rt2880-pinmux",
-+ .owner = THIS_MODULE,
-+ .of_match_table = rt2880_pinmux_match,
-+ },
-+};
-+
-+int __init rt2880_pinmux_init(void)
-+{
-+ return platform_driver_register(&rt2880_pinmux_driver);
-+}
-+
-+core_initcall_sync(rt2880_pinmux_init);
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