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gpio: at91: Implement ops get_flags

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Add ops get_dir_flags() to read status from GPIO registers.

Signed-off-by: Zixun LI <admin@hifiphile.com>
This commit is contained in:
Zixun LI 2024-11-13 11:11:09 +01:00 • committed by Eugen Hristev
parent 4c178d4061
commit 94317f881b
1 changed files with 45 additions and 0 deletions
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45
drivers/gpio/at91_gpio.c
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@ -239,6 +239,24 @@ static void at91_set_port_multi_drive(struct at91_port *at91_port, int offset, i
else
writel(mask, &at91_port->mddr);
}
static bool at91_get_port_multi_drive(struct at91_port *at91_port, int offset)
{
u32 mask, val;
mask = 1 << offset;
val = readl(&at91_port->mdsr);
return !!(val & mask);
}
static bool at91_get_port_pullup(struct at91_port *at91_port, int offset)
{
u32 mask, val;
mask = 1 << offset;
val = readl(&at91_port->pusr);
return !(val & mask);
}
#endif
static void at91_set_port_input(struct at91_port *at91_port, int offset,
@ -605,6 +623,32 @@ static int at91_gpio_set_flags(struct udevice *dev, unsigned int offset,
return 0;
}
static int at91_gpio_get_flags(struct udevice *dev, unsigned int offset,
ulong *flagsp)
{
struct at91_port_priv *port = dev_get_priv(dev);
ulong dir_flags = 0;
if (at91_get_port_output(port->regs, offset)) {
dir_flags |= GPIOD_IS_OUT;
if (at91_get_port_multi_drive(port->regs, offset))
dir_flags |= GPIOD_OPEN_DRAIN;
if (at91_get_port_value(port->regs, offset))
dir_flags |= GPIOD_IS_OUT_ACTIVE;
} else {
dir_flags |= GPIOD_IS_IN;
}
if (at91_get_port_pullup(port->regs, offset))
dir_flags |= GPIOD_PULL_UP;
*flagsp = dir_flags;
return 0;
}
static const char *at91_get_bank_name(uint32_t base_addr)
{
switch (base_addr) {
@ -634,6 +678,7 @@ static const struct dm_gpio_ops gpio_at91_ops = {
.set_value = at91_gpio_set_value,
.get_function = at91_gpio_get_function,
.set_flags = at91_gpio_set_flags,
.get_flags = at91_gpio_get_flags,
};
static int at91_gpio_probe(struct udevice *dev)