Add ops get_dir_flags() to read status from GPIO registers.
Signed-off-by: Zixun LI admin@hifiphile.com --- drivers/gpio/at91_gpio.c | 45 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+)
diff --git a/drivers/gpio/at91_gpio.c b/drivers/gpio/at91_gpio.c index 7828f9b447..c986007716 100644 --- a/drivers/gpio/at91_gpio.c +++ b/drivers/gpio/at91_gpio.c @@ -240,6 +240,24 @@ 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, @@ -608,6 +626,32 @@ 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) { @@ -637,6 +681,7 @@ 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)