drivers/pinctrl/bcm/pinctrl-bcm4908.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2021 Rafał Miłecki <rafal@milecki.pl> */

#include <linux/err.h>
#include <linux/io.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/string_helpers.h>

#include "../core.h"
#include "../pinmux.h"

#define BCM4908_NUM_PINS			86

#define BCM4908_TEST_PORT_BLOCK_EN_LSB			0x00
#define BCM4908_TEST_PORT_BLOCK_DATA_MSB		0x04
#define BCM4908_TEST_PORT_BLOCK_DATA_LSB		0x08
#define  BCM4908_TEST_PORT_LSB_PINMUX_DATA_SHIFT	12
#define BCM4908_TEST_PORT_COMMAND			0x0c
#define  BCM4908_TEST_PORT_CMD_LOAD_MUX_REG		0x00000021

struct bcm4908_pinctrl {
	struct device *dev;
	void __iomem *base;
	struct mutex mutex;
	struct pinctrl_dev *pctldev;
	struct pinctrl_desc pctldesc;
};

/*
 * Groups
 */

struct bcm4908_pinctrl_pin_setup {
	unsigned int number;
	unsigned int function;
};

static const struct bcm4908_pinctrl_pin_setup led_0_pins_a[] = {
	{ 0, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_1_pins_a[] = {
	{ 1, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_2_pins_a[] = {
	{ 2, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_3_pins_a[] = {
	{ 3, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_4_pins_a[] = {
	{ 4, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_5_pins_a[] = {
	{ 5, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_6_pins_a[] = {
	{ 6, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_7_pins_a[] = {
	{ 7, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_8_pins_a[] = {
	{ 8, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_9_pins_a[] = {
	{ 9, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_10_pins_a[] = {
	{ 10, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_11_pins_a[] = {
	{ 11, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_12_pins_a[] = {
	{ 12, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_13_pins_a[] = {
	{ 13, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_14_pins_a[] = {
	{ 14, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_15_pins_a[] = {
	{ 15, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_16_pins_a[] = {
	{ 16, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_17_pins_a[] = {
	{ 17, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_18_pins_a[] = {
	{ 18, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_19_pins_a[] = {
	{ 19, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_20_pins_a[] = {
	{ 20, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_21_pins_a[] = {
	{ 21, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_22_pins_a[] = {
	{ 22, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_23_pins_a[] = {
	{ 23, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_24_pins_a[] = {
	{ 24, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_25_pins_a[] = {
	{ 25, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_26_pins_a[] = {
	{ 26, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_27_pins_a[] = {
	{ 27, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_28_pins_a[] = {
	{ 28, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_29_pins_a[] = {
	{ 29, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_30_pins_a[] = {
	{ 30, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_31_pins_a[] = {
	{ 31, 3 },
};

static const struct bcm4908_pinctrl_pin_setup led_10_pins_b[] = {
	{ 8, 2 },
};

static const struct bcm4908_pinctrl_pin_setup led_11_pins_b[] = {
	{ 9, 2 },
};

static const struct bcm4908_pinctrl_pin_setup led_12_pins_b[] = {
	{ 0, 2 },
};

static const struct bcm4908_pinctrl_pin_setup led_13_pins_b[] = {
	{ 1, 2 },
};

static const struct bcm4908_pinctrl_pin_setup led_31_pins_b[] = {
	{ 30, 2 },
};

static const struct bcm4908_pinctrl_pin_setup hs_uart_pins[] = {
	{ 10, 0 },	/* CTS */
	{ 11, 0 },	/* RTS */
	{ 12, 0 },	/* RXD */
	{ 13, 0 },	/* TXD */
};

static const struct bcm4908_pinctrl_pin_setup i2c_pins_a[] = {
	{ 18, 0 },	/* SDA */
	{ 19, 0 },	/* SCL */
};

static const struct bcm4908_pinctrl_pin_setup i2c_pins_b[] = {
	{ 22, 0 },	/* SDA */
	{ 23, 0 },	/* SCL */
};

static const struct bcm4908_pinctrl_pin_setup i2s_pins[] = {
	{ 27, 0 },	/* MCLK */
	{ 28, 0 },	/* LRCK */
	{ 29, 0 },	/* SDATA */
	{ 30, 0 },	/* SCLK */
};

static const struct bcm4908_pinctrl_pin_setup nand_ctrl_pins[] = {
	{ 32, 0 },
	{ 33, 0 },
	{ 34, 0 },
	{ 43, 0 },
	{ 44, 0 },
	{ 45, 0 },
	{ 56, 1 },
};

static const struct bcm4908_pinctrl_pin_setup nand_data_pins[] = {
	{ 35, 0 },
	{ 36, 0 },
	{ 37, 0 },
	{ 38, 0 },
	{ 39, 0 },
	{ 40, 0 },
	{ 41, 0 },
	{ 42, 0 },
};

static const struct bcm4908_pinctrl_pin_setup emmc_ctrl_pins[] = {
	{ 46, 0 },
	{ 47, 0 },
};

static const struct bcm4908_pinctrl_pin_setup usb0_pwr_pins[] = {
	{ 63, 0 },
	{ 64, 0 },
};

static const struct bcm4908_pinctrl_pin_setup usb1_pwr_pins[] = {
	{ 66, 0 },
	{ 67, 0 },
};

struct bcm4908_pinctrl_grp {
	const char *name;
	const struct bcm4908_pinctrl_pin_setup *pins;
	const unsigned int num_pins;
};

static const struct bcm4908_pinctrl_grp bcm4908_pinctrl_grps[] = {
	{ "led_0_grp_a", led_0_pins_a, ARRAY_SIZE(led_0_pins_a) },
	{ "led_1_grp_a", led_1_pins_a, ARRAY_SIZE(led_1_pins_a) },
	{ "led_2_grp_a", led_2_pins_a, ARRAY_SIZE(led_2_pins_a) },
	{ "led_3_grp_a", led_3_pins_a, ARRAY_SIZE(led_3_pins_a) },
	{ "led_4_grp_a", led_4_pins_a, ARRAY_SIZE(led_4_pins_a) },
	{ "led_5_grp_a", led_5_pins_a, ARRAY_SIZE(led_5_pins_a) },
	{ "led_6_grp_a", led_6_pins_a, ARRAY_SIZE(led_6_pins_a) },
	{ "led_7_grp_a", led_7_pins_a, ARRAY_SIZE(led_7_pins_a) },
	{ "led_8_grp_a", led_8_pins_a, ARRAY_SIZE(led_8_pins_a) },
	{ "led_9_grp_a", led_9_pins_a, ARRAY_SIZE(led_9_pins_a) },
	{ "led_10_grp_a", led_10_pins_a, ARRAY_SIZE(led_10_pins_a) },
	{ "led_11_grp_a", led_11_pins_a, ARRAY_SIZE(led_11_pins_a) },
	{ "led_12_grp_a", led_12_pins_a, ARRAY_SIZE(led_12_pins_a) },
	{ "led_13_grp_a", led_13_pins_a, ARRAY_SIZE(led_13_pins_a) },
	{ "led_14_grp_a", led_14_pins_a, ARRAY_SIZE(led_14_pins_a) },
	{ "led_15_grp_a", led_15_pins_a, ARRAY_SIZE(led_15_pins_a) },
	{ "led_16_grp_a", led_16_pins_a, ARRAY_SIZE(led_16_pins_a) },
	{ "led_17_grp_a", led_17_pins_a, ARRAY_SIZE(led_17_pins_a) },
	{ "led_18_grp_a", led_18_pins_a, ARRAY_SIZE(led_18_pins_a) },
	{ "led_19_grp_a", led_19_pins_a, ARRAY_SIZE(led_19_pins_a) },
	{ "led_20_grp_a", led_20_pins_a, ARRAY_SIZE(led_20_pins_a) },
	{ "led_21_grp_a", led_21_pins_a, ARRAY_SIZE(led_21_pins_a) },
	{ "led_22_grp_a", led_22_pins_a, ARRAY_SIZE(led_22_pins_a) },
	{ "led_23_grp_a", led_23_pins_a, ARRAY_SIZE(led_23_pins_a) },
	{ "led_24_grp_a", led_24_pins_a, ARRAY_SIZE(led_24_pins_a) },
	{ "led_25_grp_a", led_25_pins_a, ARRAY_SIZE(led_25_pins_a) },
	{ "led_26_grp_a", led_26_pins_a, ARRAY_SIZE(led_26_pins_a) },
	{ "led_27_grp_a", led_27_pins_a, ARRAY_SIZE(led_27_pins_a) },
	{ "led_28_grp_a", led_28_pins_a, ARRAY_SIZE(led_28_pins_a) },
	{ "led_29_grp_a", led_29_pins_a, ARRAY_SIZE(led_29_pins_a) },
	{ "led_30_grp_a", led_30_pins_a, ARRAY_SIZE(led_30_pins_a) },
	{ "led_31_grp_a", led_31_pins_a, ARRAY_SIZE(led_31_pins_a) },
	{ "led_10_grp_b", led_10_pins_b, ARRAY_SIZE(led_10_pins_b) },
	{ "led_11_grp_b", led_11_pins_b, ARRAY_SIZE(led_11_pins_b) },
	{ "led_12_grp_b", led_12_pins_b, ARRAY_SIZE(led_12_pins_b) },
	{ "led_13_grp_b", led_13_pins_b, ARRAY_SIZE(led_13_pins_b) },
	{ "led_31_grp_b", led_31_pins_b, ARRAY_SIZE(led_31_pins_b) },
	{ "hs_uart_grp", hs_uart_pins, ARRAY_SIZE(hs_uart_pins) },
	{ "i2c_grp_a", i2c_pins_a, ARRAY_SIZE(i2c_pins_a) },
	{ "i2c_grp_b", i2c_pins_b, ARRAY_SIZE(i2c_pins_b) },
	{ "i2s_grp", i2s_pins, ARRAY_SIZE(i2s_pins) },
	{ "nand_ctrl_grp", nand_ctrl_pins, ARRAY_SIZE(nand_ctrl_pins) },
	{ "nand_data_grp", nand_data_pins, ARRAY_SIZE(nand_data_pins) },
	{ "emmc_ctrl_grp", emmc_ctrl_pins, ARRAY_SIZE(emmc_ctrl_pins) },
	{ "usb0_pwr_grp", usb0_pwr_pins, ARRAY_SIZE(usb0_pwr_pins) },
	{ "usb1_pwr_grp", usb1_pwr_pins, ARRAY_SIZE(usb1_pwr_pins) },
};

/*
 * Functions
 */

struct bcm4908_pinctrl_function {
	const char *name;
	const char * const *groups;
	const unsigned int num_groups;
};

static const char * const led_0_groups[] = { "led_0_grp_a" };
static const char * const led_1_groups[] = { "led_1_grp_a" };
static const char * const led_2_groups[] = { "led_2_grp_a" };
static const char * const led_3_groups[] = { "led_3_grp_a" };
static const char * const led_4_groups[] = { "led_4_grp_a" };
static const char * const led_5_groups[] = { "led_5_grp_a" };
static const char * const led_6_groups[] = { "led_6_grp_a" };
static const char * const led_7_groups[] = { "led_7_grp_a" };
static const char * const led_8_groups[] = { "led_8_grp_a" };
static const char * const led_9_groups[] = { "led_9_grp_a" };
static const char * const led_10_groups[] = { "led_10_grp_a", "led_10_grp_b" };
static const char * const led_11_groups[] = { "led_11_grp_a", "led_11_grp_b" };
static const char * const led_12_groups[] = { "led_12_grp_a", "led_12_grp_b" };
static const char * const led_13_groups[] = { "led_13_grp_a", "led_13_grp_b" };
static const char * const led_14_groups[] = { "led_14_grp_a" };
static const char * const led_15_groups[] = { "led_15_grp_a" };
static const char * const led_16_groups[] = { "led_16_grp_a" };
static const char * const led_17_groups[] = { "led_17_grp_a" };
static const char * const led_18_groups[] = { "led_18_grp_a" };
static const char * const led_19_groups[] = { "led_19_grp_a" };
static const char * const led_20_groups[] = { "led_20_grp_a" };
static const char * const led_21_groups[] = { "led_21_grp_a" };
static const char * const led_22_groups[] = { "led_22_grp_a" };
static const char * const led_23_groups[] = { "led_23_grp_a" };
static const char * const led_24_groups[] = { "led_24_grp_a" };
static const char * const led_25_groups[] = { "led_25_grp_a" };
static const char * const led_26_groups[] = { "led_26_grp_a" };
static const char * const led_27_groups[] = { "led_27_grp_a" };
static const char * const led_28_groups[] = { "led_28_grp_a" };
static const char * const led_29_groups[] = { "led_29_grp_a" };
static const char * const led_30_groups[] = { "led_30_grp_a" };
static const char * const led_31_groups[] = { "led_31_grp_a", "led_31_grp_b" };
static const char * const hs_uart_groups[] = { "hs_uart_grp" };
static const char * const i2c_groups[] = { "i2c_grp_a", "i2c_grp_b" };
static const char * const i2s_groups[] = { "i2s_grp" };
static const char * const nand_ctrl_groups[] = { "nand_ctrl_grp" };
static const char * const nand_data_groups[] = { "nand_data_grp" };
static const char * const emmc_ctrl_groups[] = { "emmc_ctrl_grp" };
static const char * const usb0_pwr_groups[] = { "usb0_pwr_grp" };
static const char * const usb1_pwr_groups[] = { "usb1_pwr_grp" };

static const struct bcm4908_pinctrl_function bcm4908_pinctrl_functions[] = {
	{ "led_0", led_0_groups, ARRAY_SIZE(led_0_groups) },
	{ "led_1", led_1_groups, ARRAY_SIZE(led_1_groups) },
	{ "led_2", led_2_groups, ARRAY_SIZE(led_2_groups) },
	{ "led_3", led_3_groups, ARRAY_SIZE(led_3_groups) },
	{ "led_4", led_4_groups, ARRAY_SIZE(led_4_groups) },
	{ "led_5", led_5_groups, ARRAY_SIZE(led_5_groups) },
	{ "led_6", led_6_groups, ARRAY_SIZE(led_6_groups) },
	{ "led_7", led_7_groups, ARRAY_SIZE(led_7_groups) },
	{ "led_8", led_8_groups, ARRAY_SIZE(led_8_groups) },
	{ "led_9", led_9_groups, ARRAY_SIZE(led_9_groups) },
	{ "led_10", led_10_groups, ARRAY_SIZE(led_10_groups) },
	{ "led_11", led_11_groups, ARRAY_SIZE(led_11_groups) },
	{ "led_12", led_12_groups, ARRAY_SIZE(led_12_groups) },
	{ "led_13", led_13_groups, ARRAY_SIZE(led_13_groups) },
	{ "led_14", led_14_groups, ARRAY_SIZE(led_14_groups) },
	{ "led_15", led_15_groups, ARRAY_SIZE(led_15_groups) },
	{ "led_16", led_16_groups, ARRAY_SIZE(led_16_groups) },
	{ "led_17", led_17_groups, ARRAY_SIZE(led_17_groups) },
	{ "led_18", led_18_groups, ARRAY_SIZE(led_18_groups) },
	{ "led_19", led_19_groups, ARRAY_SIZE(led_19_groups) },
	{ "led_20", led_20_groups, ARRAY_SIZE(led_20_groups) },
	{ "led_21", led_21_groups, ARRAY_SIZE(led_21_groups) },
	{ "led_22", led_22_groups, ARRAY_SIZE(led_22_groups) },
	{ "led_23", led_23_groups, ARRAY_SIZE(led_23_groups) },
	{ "led_24", led_24_groups, ARRAY_SIZE(led_24_groups) },
	{ "led_25", led_25_groups, ARRAY_SIZE(led_25_groups) },
	{ "led_26", led_26_groups, ARRAY_SIZE(led_26_groups) },
	{ "led_27", led_27_groups, ARRAY_SIZE(led_27_groups) },
	{ "led_28", led_28_groups, ARRAY_SIZE(led_28_groups) },
	{ "led_29", led_29_groups, ARRAY_SIZE(led_29_groups) },
	{ "led_30", led_30_groups, ARRAY_SIZE(led_30_groups) },
	{ "led_31", led_31_groups, ARRAY_SIZE(led_31_groups) },
	{ "hs_uart", hs_uart_groups, ARRAY_SIZE(hs_uart_groups) },
	{ "i2c", i2c_groups, ARRAY_SIZE(i2c_groups) },
	{ "i2s", i2s_groups, ARRAY_SIZE(i2s_groups) },
	{ "nand_ctrl", nand_ctrl_groups, ARRAY_SIZE(nand_ctrl_groups) },
	{ "nand_data", nand_data_groups, ARRAY_SIZE(nand_data_groups) },
	{ "emmc_ctrl", emmc_ctrl_groups, ARRAY_SIZE(emmc_ctrl_groups) },
	{ "usb0_pwr", usb0_pwr_groups, ARRAY_SIZE(usb0_pwr_groups) },
	{ "usb1_pwr", usb1_pwr_groups, ARRAY_SIZE(usb1_pwr_groups) },
};

/*
 * Groups code
 */

static const struct pinctrl_ops bcm4908_pinctrl_ops = {
	.get_groups_count = pinctrl_generic_get_group_count,
	.get_group_name = pinctrl_generic_get_group_name,
	.get_group_pins = pinctrl_generic_get_group_pins,
	.dt_node_to_map = pinconf_generic_dt_node_to_map_group,
	.dt_free_map = pinconf_generic_dt_free_map,
};

/*
 * Functions code
 */

static int bcm4908_pinctrl_set_mux(struct pinctrl_dev *pctrl_dev,
			      unsigned int func_selector,
			      unsigned int group_selector)
{
	struct bcm4908_pinctrl *bcm4908_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
	const struct bcm4908_pinctrl_grp *group;
	struct group_desc *group_desc;
	int i;

	group_desc = pinctrl_generic_get_group(pctrl_dev, group_selector);
	if (!group_desc)
		return -EINVAL;
	group = group_desc->data;

	mutex_lock(&bcm4908_pinctrl->mutex);
	for (i = 0; i < group->num_pins; i++) {
		u32 lsb = 0;

		lsb |= group->pins[i].number;
		lsb |= group->pins[i].function << BCM4908_TEST_PORT_LSB_PINMUX_DATA_SHIFT;

		writel(0x0, bcm4908_pinctrl->base + BCM4908_TEST_PORT_BLOCK_DATA_MSB);
		writel(lsb, bcm4908_pinctrl->base + BCM4908_TEST_PORT_BLOCK_DATA_LSB);
		writel(BCM4908_TEST_PORT_CMD_LOAD_MUX_REG,
		       bcm4908_pinctrl->base + BCM4908_TEST_PORT_COMMAND);
	}
	mutex_unlock(&bcm4908_pinctrl->mutex);

	return 0;
}

static const struct pinmux_ops bcm4908_pinctrl_pmxops = {
	.get_functions_count = pinmux_generic_get_function_count,
	.get_function_name = pinmux_generic_get_function_name,
	.get_function_groups = pinmux_generic_get_function_groups,
	.set_mux = bcm4908_pinctrl_set_mux,
};

/*
 * Controller code
 */

static struct pinctrl_desc bcm4908_pinctrl_desc = {
	.name = "bcm4908-pinctrl",
	.pctlops = &bcm4908_pinctrl_ops,
	.pmxops = &bcm4908_pinctrl_pmxops,
};

static const struct of_device_id bcm4908_pinctrl_of_match_table[] = {
	{ .compatible = "brcm,bcm4908-pinctrl", },
	{ }
};

static int bcm4908_pinctrl_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct bcm4908_pinctrl *bcm4908_pinctrl;
	struct pinctrl_desc *pctldesc;
	struct pinctrl_pin_desc *pins;
	char **pin_names;
	int i;

	bcm4908_pinctrl = devm_kzalloc(dev, sizeof(*bcm4908_pinctrl), GFP_KERNEL);
	if (!bcm4908_pinctrl)
		return -ENOMEM;
	pctldesc = &bcm4908_pinctrl->pctldesc;
	platform_set_drvdata(pdev, bcm4908_pinctrl);

	/* Set basic properties */

	bcm4908_pinctrl->dev = dev;

	bcm4908_pinctrl->base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(bcm4908_pinctrl->base))
		return PTR_ERR(bcm4908_pinctrl->base);

	mutex_init(&bcm4908_pinctrl->mutex);

	memcpy(pctldesc, &bcm4908_pinctrl_desc, sizeof(*pctldesc));

	/* Set pinctrl properties */

	pin_names = devm_kasprintf_strarray(dev, "pin", BCM4908_NUM_PINS);
	if (IS_ERR(pin_names))
		return PTR_ERR(pin_names);

	pins = devm_kcalloc(dev, BCM4908_NUM_PINS, sizeof(*pins), GFP_KERNEL);
	if (!pins)
		return -ENOMEM;
	for (i = 0; i < BCM4908_NUM_PINS; i++) {
		pins[i].number = i;
		pins[i].name = pin_names[i];
	}
	pctldesc->pins = pins;
	pctldesc->npins = BCM4908_NUM_PINS;

	/* Register */

	bcm4908_pinctrl->pctldev = devm_pinctrl_register(dev, pctldesc, bcm4908_pinctrl);
	if (IS_ERR(bcm4908_pinctrl->pctldev))
		return dev_err_probe(dev, PTR_ERR(bcm4908_pinctrl->pctldev),
				     "Failed to register pinctrl\n");

	/* Groups */

	for (i = 0; i < ARRAY_SIZE(bcm4908_pinctrl_grps); i++) {
		const struct bcm4908_pinctrl_grp *group = &bcm4908_pinctrl_grps[i];
		int *pins;
		int j;

		pins = devm_kcalloc(dev, group->num_pins, sizeof(*pins), GFP_KERNEL);
		if (!pins)
			return -ENOMEM;
		for (j = 0; j < group->num_pins; j++)
			pins[j] = group->pins[j].number;

		pinctrl_generic_add_group(bcm4908_pinctrl->pctldev, group->name,
					  pins, group->num_pins, (void *)group);
	}

	/* Functions */

	for (i = 0; i < ARRAY_SIZE(bcm4908_pinctrl_functions); i++) {
		const struct bcm4908_pinctrl_function *function = &bcm4908_pinctrl_functions[i];

		pinmux_generic_add_function(bcm4908_pinctrl->pctldev,
					    function->name,
					    function->groups,
					    function->num_groups, NULL);
	}

	return 0;
}

static struct platform_driver bcm4908_pinctrl_driver = {
	.probe = bcm4908_pinctrl_probe,
	.driver = {
		.name = "bcm4908-pinctrl",
		.of_match_table = bcm4908_pinctrl_of_match_table,
	},
};

module_platform_driver(bcm4908_pinctrl_driver);

MODULE_AUTHOR("Rafał Miłecki");
MODULE_DESCRIPTION("Broadcom BCM4908 pinmux driver");
MODULE_LICENSE("GPL v2");
MODULE_DEVICE_TABLE(of, bcm4908_pinctrl_of_match_table);