1 files changed, 46 insertions, 335 deletions

diff --git a/drivers/pinctrl/ralink/pinctrl-rt2880.c b/drivers/pinctrl/ralink/pinctrl-rt2880.c
index 96fc06d1b8b9..811e12df1133 100644
--- a/drivers/pinctrl/ralink/pinctrl-rt2880.c
+++ b/drivers/pinctrl/ralink/pinctrl-rt2880.c
@@ -1,349 +1,60 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  Copyright (C) 2013 John Crispin <blogic@openwrt.org>
- */
+// SPDX-License-Identifier: GPL-2.0-only
 
+#include <linux/bitops.h>
 #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/pinconf-generic.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/mt7620.h>
-
-#include "pinmux.h"
-#include "../core.h"
-#include "../pinctrl-utils.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;
-
-	u8 *gpio;
-	int max_pins;
+#include "pinctrl-ralink.h"
+
+#define RT2880_GPIO_MODE_I2C		BIT(0)
+#define RT2880_GPIO_MODE_UART0		BIT(1)
+#define RT2880_GPIO_MODE_SPI		BIT(2)
+#define RT2880_GPIO_MODE_UART1		BIT(3)
+#define RT2880_GPIO_MODE_JTAG		BIT(4)
+#define RT2880_GPIO_MODE_MDIO		BIT(5)
+#define RT2880_GPIO_MODE_SDRAM		BIT(6)
+#define RT2880_GPIO_MODE_PCI		BIT(7)
+
+static struct ralink_pmx_func i2c_func[] = { FUNC("i2c", 0, 1, 2) };
+static struct ralink_pmx_func spi_func[] = { FUNC("spi", 0, 3, 4) };
+static struct ralink_pmx_func uartlite_func[] = { FUNC("uartlite", 0, 7, 8) };
+static struct ralink_pmx_func jtag_func[] = { FUNC("jtag", 0, 17, 5) };
+static struct ralink_pmx_func mdio_func[] = { FUNC("mdio", 0, 22, 2) };
+static struct ralink_pmx_func sdram_func[] = { FUNC("sdram", 0, 24, 16) };
+static struct ralink_pmx_func pci_func[] = { FUNC("pci", 0, 40, 32) };
+
+static struct ralink_pmx_group rt2880_pinmux_data_act[] = {
+	GRP("i2c", i2c_func, 1, RT2880_GPIO_MODE_I2C),
+	GRP("spi", spi_func, 1, RT2880_GPIO_MODE_SPI),
+	GRP("uartlite", uartlite_func, 1, RT2880_GPIO_MODE_UART0),
+	GRP("jtag", jtag_func, 1, RT2880_GPIO_MODE_JTAG),
+	GRP("mdio", mdio_func, 1, RT2880_GPIO_MODE_MDIO),
+	GRP("sdram", sdram_func, 1, RT2880_GPIO_MODE_SDRAM),
+	GRP("pci", pci_func, 1, RT2880_GPIO_MODE_PCI),
+	{ 0 }
 };
 
-static int rt2880_get_group_count(struct pinctrl_dev *pctrldev)
+static int rt2880_pinctrl_probe(struct platform_device *pdev)
 {
-	struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
-
-	return p->group_count;
+	return ralink_pinctrl_init(pdev, rt2880_pinmux_data_act);
 }
 
-static const char *rt2880_get_group_name(struct pinctrl_dev *pctrldev,
-					 unsigned int group)
-{
-	struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
-
-	return (group >= p->group_count) ? NULL : p->group_names[group];
-}
-
-static int rt2880_get_group_pins(struct pinctrl_dev *pctrldev,
-				 unsigned int group,
-				 const unsigned int **pins,
-				 unsigned int *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 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,
-	.dt_node_to_map		= pinconf_generic_dt_node_to_map_all,
-	.dt_free_map		= pinconf_generic_dt_free_map,
+static const struct of_device_id rt2880_pinctrl_match[] = {
+	{ .compatible = "ralink,rt2880-pinctrl" },
+	{}
 };
-
-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 int 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 int func,
-				       const char * const **groups,
-				       unsigned int * 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 int func, unsigned int 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 0;
-	}
-
-	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 int 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,
+MODULE_DEVICE_TABLE(of, rt2880_pinctrl_match);
+
+static struct platform_driver rt2880_pinctrl_driver = {
+	.probe = rt2880_pinctrl_probe,
+	.driver = {
+		.name = "rt2880-pinctrl",
+		.of_match_table = rt2880_pinctrl_match,
+	},
 };
 
-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_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_kcalloc(p->dev, p->group_count,
-				      sizeof(char *), GFP_KERNEL);
-	if (!p->group_names)
-		return -ENOMEM;
-
-	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 */
-	p->func = devm_kcalloc(p->dev, p->func_count,
-			       sizeof(*p->func), GFP_KERNEL);
-	gpio_func.groups = devm_kcalloc(p->dev, p->group_count, sizeof(int),
-					GFP_KERNEL);
-	if (!p->func || !gpio_func.groups)
-		return -ENOMEM;
-
-	/* 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;
-
-	p->func[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++) {
-			p->func[c] = &p->groups[i].func[j];
-			p->func[c]->groups = devm_kzalloc(p->dev, sizeof(int),
-						    GFP_KERNEL);
-			if (!p->func[c]->groups)
-				return -ENOMEM;
-			p->func[c]->groups[0] = i;
-			p->func[c]->group_count = 1;
-			c++;
-		}
-	}
-	return 0;
-}
-
-static int rt2880_pinmux_pins(struct rt2880_priv *p)
+static int __init rt2880_pinctrl_init(void)
 {
-	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_kcalloc(p->dev,
-						p->func[i]->pin_count,
-						sizeof(int),
-						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_kcalloc(p->dev, p->max_pins, sizeof(u8), GFP_KERNEL);
-	/* the pads needed to tell pinctrl about our pins */
-	p->pads = devm_kcalloc(p->dev, p->max_pins,
-			       sizeof(struct pinctrl_pin_desc), GFP_KERNEL);
-	if (!p->pads || !p->gpio)
-		return -ENOMEM;
-
-	memset(p->gpio, 1, sizeof(u8) * 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)
-			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;
-}
-
-int rt2880_pinmux_init(struct platform_device *pdev,
-		       struct rt2880_pmx_group *data)
-{
-	struct rt2880_priv *p;
-	struct pinctrl_dev *dev;
-	int err;
-
-	if (!data)
-		return -ENOTSUPP;
-
-	/* 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 = data;
-	platform_set_drvdata(pdev, p);
-
-	/* init the device */
-	err = rt2880_pinmux_index(p);
-	if (err) {
-		dev_err(&pdev->dev, "failed to load index\n");
-		return err;
-	}
-
-	err = rt2880_pinmux_pins(p);
-	if (err) {
-		dev_err(&pdev->dev, "failed to load pins\n");
-		return err;
-	}
-	dev = pinctrl_register(p->desc, &pdev->dev, p);
-
-	return PTR_ERR_OR_ZERO(dev);
+	return platform_driver_register(&rt2880_pinctrl_driver);
 }
+core_initcall_sync(rt2880_pinctrl_init);