pinctrl: stm32: fix compile error and modernize

 * Heavily based on Mediatek's pinctrl driver

 */

#include <linux/clk.h>

#include <linux/gpio.h>

#include <linux/gpio/driver.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/of.h>

#define gpio_range_to_bank(chip) \

		container_of(chip, struct stm32_gpio_bank, range)

#define gpio_chip_to_bank(chip) \

		container_of(chip, struct stm32_gpio_bank, gpio_chip)

static const char * const stm32_gpio_functions[] = {

	"gpio", "af0", "af1",

	"af2", "af3", "af4",

static int stm32_gpio_get(struct gpio_chip *chip, unsigned offset)

{

	struct stm32_gpio_bank *bank = gpio_chip_to_bank(chip);

	struct stm32_gpio_bank *bank = gpiochip_get_data(chip);

	int ret;

	clk_enable(bank->clk);

static void stm32_gpio_set(struct gpio_chip *chip, unsigned offset, int value)

{

	struct stm32_gpio_bank *bank = gpio_chip_to_bank(chip);

	struct stm32_gpio_bank *bank = gpiochip_get_data(chip);

	__stm32_gpio_set(bank, offset, value);

}

static int stm32_gpio_direction_output(struct gpio_chip *chip,

	unsigned offset, int value)

{

	struct stm32_gpio_bank *bank = gpio_chip_to_bank(chip);

	struct stm32_gpio_bank *bank = gpiochip_get_data(chip);

	__stm32_gpio_set(bank, offset, value);

	pinctrl_gpio_direction_output(chip->base + offset);

	bank->gpio_chip.base = bank_nr * STM32_GPIO_PINS_PER_BANK;

	bank->gpio_chip.ngpio = npins;

	bank->gpio_chip.of_node = np;

	bank->gpio_chip.dev = dev;

	bank->gpio_chip.parent = dev;

	spin_lock_init(&bank->lock);

	of_property_read_string(np, "st,bank-name", &range->name);

	range->pin_base = range->base = range->id * STM32_GPIO_PINS_PER_BANK;

	range->npins = bank->gpio_chip.ngpio;

	range->gc = &bank->gpio_chip;

	err  = gpiochip_add(&bank->gpio_chip);

	err = gpiochip_add_data(&bank->gpio_chip, bank);

	if (err) {

		dev_err(dev, "Failed to add gpiochip(%d)!\n", bank_nr);

		return err;