Add Faraday Technology's FTGPIO010 controller driver.

Signed-off-by: Sergei Antonov saproj@gmail.com --- v1 -> v2: Replace setbits_le32() with a simpler function out_le32(). Replace readl() with in_le32() to respect endianness.

drivers/gpio/Kconfig | 6 +++ drivers/gpio/Makefile | 1 + drivers/gpio/ftgpio010.c | 100 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 107 insertions(+) create mode 100644 drivers/gpio/ftgpio010.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index c949f9d2f7cc..2a60478b476a 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -605,4 +605,10 @@ config TURRIS_OMNIA_MCU help Support for GPIOs on MCU connected to Turris Omnia via i2c.

+config FTGPIO010 + bool "Faraday Technology FTGPIO010 driver" + depends on DM_GPIO + help + Support for GPIOs on Faraday Technology's FTGPIO010 controller. + endif diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 9d718a554e59..eee7908871d8 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -75,3 +75,4 @@ obj-$(CONFIG_SL28CPLD_GPIO) += sl28cpld-gpio.o obj-$(CONFIG_ZYNQMP_GPIO_MODEPIN) += zynqmp_gpio_modepin.o obj-$(CONFIG_SLG7XL45106_I2C_GPO) += gpio_slg7xl45106.o obj-$(CONFIG_$(SPL_TPL_)TURRIS_OMNIA_MCU) += turris_omnia_mcu.o +obj-$(CONFIG_FTGPIO010) += ftgpio010.o diff --git a/drivers/gpio/ftgpio010.c b/drivers/gpio/ftgpio010.c new file mode 100644 index 000000000000..fa6b180963d3 --- /dev/null +++ b/drivers/gpio/ftgpio010.c @@ -0,0 +1,100 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Faraday Technology's FTGPIO010 controller. + */ + +#include <common.h> +#include <dm.h> +#include <asm/io.h> +#include <asm/gpio.h> + +struct ftgpio010_regs { + u32 out; + u32 in; + u32 direction; + u32 reserved; + u32 set; + u32 clear; +}; + +struct ftgpio010_plat { + struct ftgpio010_regs __iomem *regs; +}; + +static int ftgpio010_direction_input(struct udevice *dev, unsigned int pin) +{ + struct ftgpio010_plat *plat = dev_get_plat(dev); + struct ftgpio010_regs *const regs = plat->regs; + + clrbits_le32(&regs->direction, 1 << pin); + return 0; +} + +static int ftgpio010_direction_output(struct udevice *dev, unsigned int pin, + int val) +{ + struct ftgpio010_plat *plat = dev_get_plat(dev); + struct ftgpio010_regs *const regs = plat->regs; + + /* change the data first, then the direction. to avoid glitch */ + out_le32(val ? &regs->set : &regs->clear, 1 << pin); + setbits_le32(&regs->direction, 1 << pin); + + return 0; +} + +static int ftgpio010_get_value(struct udevice *dev, unsigned int pin) +{ + struct ftgpio010_plat *plat = dev_get_plat(dev); + struct ftgpio010_regs *const regs = plat->regs; + + return in_le32(&regs->in) >> pin & 1; +} + +static int ftgpio010_set_value(struct udevice *dev, unsigned int pin, int val) +{ + struct ftgpio010_plat *plat = dev_get_plat(dev); + struct ftgpio010_regs *const regs = plat->regs; + + out_le32(val ? &regs->set : &regs->clear, 1 << pin); + return 0; +} + +static int ftgpio010_probe(struct udevice *dev) +{ + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + + uc_priv->gpio_count = ofnode_read_u32_default(dev_ofnode(dev), + "nr-gpios", 32); + return 0; +} + +static int ftgpio010_of_to_plat(struct udevice *dev) +{ + struct ftgpio010_plat *plat = dev_get_plat(dev); + + plat->regs = dev_read_addr_ptr(dev); + return 0; +} + +static const struct dm_gpio_ops ftgpio010_ops = { + .direction_input = ftgpio010_direction_input, + .direction_output = ftgpio010_direction_output, + .get_value = ftgpio010_get_value, + .set_value = ftgpio010_set_value, +}; + +static const struct udevice_id ftgpio010_ids[] = { + { .compatible = "faraday,ftgpio010" }, + { } +}; + +U_BOOT_DRIVER(ftgpio010) = { + .name = "ftgpio010", + .id = UCLASS_GPIO, + .of_match = ftgpio010_ids, + .ops = &ftgpio010_ops, + .of_to_plat = ftgpio010_of_to_plat, + .plat_auto = sizeof(struct ftgpio010_plat), + .probe = ftgpio010_probe, +};