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-rw-r--r--target/linux/ramips/patches-4.4/0025-pinctrl-ralink-add-pinctrl-driver.patch524
1 files changed, 524 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-4.4/0025-pinctrl-ralink-add-pinctrl-driver.patch b/target/linux/ramips/patches-4.4/0025-pinctrl-ralink-add-pinctrl-driver.patch
new file mode 100644
index 0000000000..315d9563bc
--- /dev/null
+++ b/target/linux/ramips/patches-4.4/0025-pinctrl-ralink-add-pinctrl-driver.patch
@@ -0,0 +1,524 @@
+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
+@@ -585,6 +585,8 @@ 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
+@@ -114,6 +114,11 @@ 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
+@@ -20,6 +20,7 @@ obj-$(CONFIG_PINCTRL_MESON) += meson/
+ obj-$(CONFIG_PINCTRL_PALMAS) += pinctrl-palmas.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_SINGLE) += pinctrl-single.o
+ obj-$(CONFIG_PINCTRL_SIRF) += sirf/
+ obj-$(CONFIG_PINCTRL_TEGRA) += pinctrl-tegra.o
+--- /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, "ralink,function", &function);
++ int grps = of_property_count_strings(np, "ralink,group");
++ int i;
++
++ if (func || !grps)
++ return;
++
++ for (i = 0; i < grps; i++) {
++ const char *group;
++
++ of_property_read_string_index(np, "ralink,group", 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, "ralink,group");
++
++ if (ret >= 0)
++ max_maps += ret;
++ }
++
++ if (!max_maps)
++ return max_maps;
++
++ *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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