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gpio: at91: Implement ops set_flags

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Support GPIO configuration with following flags:
- in, out, out_active
- open_drain, pull_up

Signed-off-by: Zixun LI <admin@hifiphile.com>
This commit is contained in:
Zixun LI
2024-11-13 11:10:54 +01:00
committed by Eugen Hristev
parent e4980192b6
commit 4c178d4061
1 changed files with 39 additions and 0 deletions
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39
drivers/gpio/at91_gpio.c
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@@ -228,6 +228,17 @@ static bool at91_is_port_gpio(struct at91_port *at91_port, int offset)
val = readl(&at91_port->psr);
return !!(val & mask);
}
static void at91_set_port_multi_drive(struct at91_port *at91_port, int offset, int is_on)
{
u32 mask;
mask = 1 << offset;
if (is_on)
writel(mask, &at91_port->mder);
else
writel(mask, &at91_port->mddr);
}
#endif
static void at91_set_port_input(struct at91_port *at91_port, int offset,
@@ -567,6 +578,33 @@ static int at91_gpio_get_function(struct udevice *dev, unsigned offset)
return GPIOF_INPUT;
}
static int at91_gpio_set_flags(struct udevice *dev, unsigned int offset,
ulong flags)
{
struct at91_port_priv *port = dev_get_priv(dev);
ulong supported_mask;
supported_mask = GPIOD_OPEN_DRAIN | GPIOD_MASK_DIR | GPIOD_PULL_UP;
if (flags & ~supported_mask)
return -ENOTSUPP;
if (flags & GPIOD_IS_OUT) {
if (flags & GPIOD_OPEN_DRAIN)
at91_set_port_multi_drive(port->regs, offset, true);
else
at91_set_port_multi_drive(port->regs, offset, false);
at91_set_port_output(port->regs, offset, flags & GPIOD_IS_OUT_ACTIVE);
} else if (flags & GPIOD_IS_IN) {
at91_set_port_input(port->regs, offset, false);
}
if (flags & GPIOD_PULL_UP)
at91_set_port_pullup(port->regs, offset, true);
return 0;
}
static const char *at91_get_bank_name(uint32_t base_addr)
{
switch (base_addr) {
@@ -595,6 +633,7 @@ static const struct dm_gpio_ops gpio_at91_ops = {
.get_value = at91_gpio_get_value,
.set_value = at91_gpio_set_value,
.get_function = at91_gpio_get_function,
.set_flags = at91_gpio_set_flags,
};
static int at91_gpio_probe(struct udevice *dev)