diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/gpio/gpio-gpio-mm.c | 154 |
2 files changed, 31 insertions, 124 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 63acb9cb4c58..525b911b4ac7 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -898,6 +898,7 @@ config GPIO_GPIO_MM tristate "Diamond Systems GPIO-MM GPIO support" depends on PC104 select ISA_BUS_API + select REGMAP_MMIO select GPIO_I8255 help Enables GPIO support for the Diamond Systems GPIO-MM and GPIO-MM-12. diff --git a/drivers/gpio/gpio-gpio-mm.c b/drivers/gpio/gpio-gpio-mm.c index 2689671b6b01..43d823a56e59 100644 --- a/drivers/gpio/gpio-gpio-mm.c +++ b/drivers/gpio/gpio-gpio-mm.c @@ -8,13 +8,13 @@ */ #include <linux/device.h> #include <linux/errno.h> -#include <linux/gpio/driver.h> -#include <linux/io.h> #include <linux/ioport.h> #include <linux/isa.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/moduleparam.h> +#include <linux/regmap.h> +#include <linux/types.h> #include "gpio-i8255.h" @@ -30,83 +30,22 @@ MODULE_PARM_DESC(base, "Diamond Systems GPIO-MM base addresses"); #define GPIOMM_NUM_PPI 2 -/** - * struct gpiomm_gpio - GPIO device private data structure - * @chip: instance of the gpio_chip - * @ppi_state: Programmable Peripheral Interface group states - * @ppi: Programmable Peripheral Interface groups - */ -struct gpiomm_gpio { - struct gpio_chip chip; - struct i8255_state ppi_state[GPIOMM_NUM_PPI]; - struct i8255 __iomem *ppi; +static const struct regmap_range gpiomm_volatile_ranges[] = { + i8255_volatile_regmap_range(0x0), i8255_volatile_regmap_range(0x4), +}; +static const struct regmap_access_table gpiomm_volatile_table = { + .yes_ranges = gpiomm_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(gpiomm_volatile_ranges), +}; +static const struct regmap_config gpiomm_regmap_config = { + .reg_bits = 8, + .reg_stride = 1, + .val_bits = 8, + .io_port = true, + .max_register = 0x7, + .volatile_table = &gpiomm_volatile_table, + .cache_type = REGCACHE_FLAT, }; - -static int gpiomm_gpio_get_direction(struct gpio_chip *chip, - unsigned int offset) -{ - struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip); - - if (i8255_get_direction(gpiommgpio->ppi_state, offset)) - return GPIO_LINE_DIRECTION_IN; - - return GPIO_LINE_DIRECTION_OUT; -} - -static int gpiomm_gpio_direction_input(struct gpio_chip *chip, - unsigned int offset) -{ - struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip); - - i8255_direction_input(gpiommgpio->ppi, gpiommgpio->ppi_state, offset); - - return 0; -} - -static int gpiomm_gpio_direction_output(struct gpio_chip *chip, - unsigned int offset, int value) -{ - struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip); - - i8255_direction_output(gpiommgpio->ppi, gpiommgpio->ppi_state, offset, - value); - - return 0; -} - -static int gpiomm_gpio_get(struct gpio_chip *chip, unsigned int offset) -{ - struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip); - - return i8255_get(gpiommgpio->ppi, offset); -} - -static int gpiomm_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, - unsigned long *bits) -{ - struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip); - - i8255_get_multiple(gpiommgpio->ppi, mask, bits, chip->ngpio); - - return 0; -} - -static void gpiomm_gpio_set(struct gpio_chip *chip, unsigned int offset, - int value) -{ - struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip); - - i8255_set(gpiommgpio->ppi, gpiommgpio->ppi_state, offset, value); -} - -static void gpiomm_gpio_set_multiple(struct gpio_chip *chip, - unsigned long *mask, unsigned long *bits) -{ - struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip); - - i8255_set_multiple(gpiommgpio->ppi, gpiommgpio->ppi_state, mask, bits, - chip->ngpio); -} #define GPIOMM_NGPIO 48 static const char *gpiomm_names[GPIOMM_NGPIO] = { @@ -120,30 +59,11 @@ static const char *gpiomm_names[GPIOMM_NGPIO] = { "Port 2C2", "Port 2C3", "Port 2C4", "Port 2C5", "Port 2C6", "Port 2C7", }; -static void gpiomm_init_dio(struct i8255 __iomem *const ppi, - struct i8255_state *const ppi_state) -{ - const unsigned long ngpio = 24; - const unsigned long mask = GENMASK(ngpio - 1, 0); - const unsigned long bits = 0; - unsigned long i; - - /* Initialize all GPIO to output 0 */ - for (i = 0; i < GPIOMM_NUM_PPI; i++) { - i8255_mode0_output(&ppi[i]); - i8255_set_multiple(&ppi[i], &ppi_state[i], &mask, &bits, ngpio); - } -} - static int gpiomm_probe(struct device *dev, unsigned int id) { - struct gpiomm_gpio *gpiommgpio; const char *const name = dev_name(dev); - int err; - - gpiommgpio = devm_kzalloc(dev, sizeof(*gpiommgpio), GFP_KERNEL); - if (!gpiommgpio) - return -ENOMEM; + struct i8255_regmap_config config = {}; + void __iomem *regs; if (!devm_request_region(dev, base[id], GPIOMM_EXTENT, name)) { dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n", @@ -151,34 +71,20 @@ static int gpiomm_probe(struct device *dev, unsigned int id) return -EBUSY; } - gpiommgpio->ppi = devm_ioport_map(dev, base[id], GPIOMM_EXTENT); - if (!gpiommgpio->ppi) + regs = devm_ioport_map(dev, base[id], GPIOMM_EXTENT); + if (!regs) return -ENOMEM; - gpiommgpio->chip.label = name; - gpiommgpio->chip.parent = dev; - gpiommgpio->chip.owner = THIS_MODULE; - gpiommgpio->chip.base = -1; - gpiommgpio->chip.ngpio = GPIOMM_NGPIO; - gpiommgpio->chip.names = gpiomm_names; - gpiommgpio->chip.get_direction = gpiomm_gpio_get_direction; - gpiommgpio->chip.direction_input = gpiomm_gpio_direction_input; - gpiommgpio->chip.direction_output = gpiomm_gpio_direction_output; - gpiommgpio->chip.get = gpiomm_gpio_get; - gpiommgpio->chip.get_multiple = gpiomm_gpio_get_multiple; - gpiommgpio->chip.set = gpiomm_gpio_set; - gpiommgpio->chip.set_multiple = gpiomm_gpio_set_multiple; - - i8255_state_init(gpiommgpio->ppi_state, GPIOMM_NUM_PPI); - gpiomm_init_dio(gpiommgpio->ppi, gpiommgpio->ppi_state); - - err = devm_gpiochip_add_data(dev, &gpiommgpio->chip, gpiommgpio); - if (err) { - dev_err(dev, "GPIO registering failed (%d)\n", err); - return err; - } + config.map = devm_regmap_init_mmio(dev, regs, &gpiomm_regmap_config); + if (IS_ERR(config.map)) + return dev_err_probe(dev, PTR_ERR(config.map), + "Unable to initialize register map\n"); + + config.parent = dev; + config.num_ppi = GPIOMM_NUM_PPI; + config.names = gpiomm_names; - return 0; + return devm_i8255_regmap_register(dev, &config); } static struct isa_driver gpiomm_driver = { |