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gpio: at91: Implement GPIOF_FUNC in get_function()

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This patch adds support for determining whether a gpio pin is mapped as
peripheral function.

Signed-off-by: Zixun LI <admin@hifiphile.com>
(cherry picked from commit e4980192b6)
This commit is contained in:
Zixun LI
2024-11-13 11:10:22 +01:00
committed by Simon Glass
parent c472aeaf7d
commit 8ef7eba734
1 changed files with 12 additions and 1 deletions
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13
drivers/gpio/at91_gpio.c
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@@ -219,6 +219,15 @@ static bool at91_get_port_output(struct at91_port *at91_port, int offset)
val = readl(&at91_port->osr);
return val & mask;
}
static bool at91_is_port_gpio(struct at91_port *at91_port, int offset)
{
u32 mask, val;
mask = 1 << offset;
val = readl(&at91_port->psr);
return !!(val & mask);
}
#endif
static void at91_set_port_input(struct at91_port *at91_port, int offset,
@@ -549,7 +558,9 @@ static int at91_gpio_get_function(struct udevice *dev, unsigned offset)
{
struct at91_port_priv *port = dev_get_priv(dev);
/* GPIOF_FUNC is not implemented yet */
if (!at91_is_port_gpio(port->regs, offset))
return GPIOF_FUNC;
if (at91_get_port_output(port->regs, offset))
return GPIOF_OUTPUT;
else