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gpio: ftgpio010: Add support for Faraday Technology FTGPIO010

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Add Faraday Technology's FTGPIO010 controller driver.

Signed-off-by: Sergei Antonov <saproj@gmail.com>
This commit is contained in:
Sergei Antonov 2022-09-12 13:09:15 +03:00 committed by Tom Rini
parent 2afa989fbe
commit d100d3e18e
3 changed files with 118 additions and 0 deletions
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6
drivers/gpio/Kconfig
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@ -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

1
drivers/gpio/Makefile
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@ -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

111
drivers/gpio/ftgpio010.c Normal file
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@ -0,0 +1,111 @@
// 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; // 1 - output
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_get_function(struct udevice *dev, unsigned int pin)
{
struct ftgpio010_plat *plat = dev_get_plat(dev);
struct ftgpio010_regs *const regs = plat->regs;
if (in_le32(&regs->direction) >> pin & 1)
return GPIOF_OUTPUT;
return GPIOF_INPUT;
}
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,
.get_function = ftgpio010_get_function,
};
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,
};