driver: gpio: Add pin_configure api for creg_gpio driver
Update pin_configure api for creg_gpio driver
Signed-off-by: Siyuan Cheng <siyuanc@synopsys.com>
diff --git a/drivers/gpio/gpio_creg_gpio.c b/drivers/gpio/gpio_creg_gpio.c
index 6ce4113..bd2c5f7 100644
--- a/drivers/gpio/gpio_creg_gpio.c
+++ b/drivers/gpio/gpio_creg_gpio.c
@@ -39,13 +39,6 @@
uint8_t on_val;
};
-static int pin_config(const struct device *dev,
- gpio_pin_t pin,
- gpio_flags_t flags)
-{
- return -ENOTSUP;
-}
-
static int port_get(const struct device *dev,
gpio_port_value_t *value)
{
@@ -119,6 +112,50 @@
return -ENOTSUP;
}
+static int pin_config(const struct device *dev,
+ gpio_pin_t pin,
+ gpio_flags_t flags)
+{
+ const struct creg_gpio_config *cfg = dev->config;
+ uint32_t io_flags;
+ bool pin_is_output;
+
+ /* Check for invalid pin number */
+ if (pin >= cfg->ngpios) {
+ return -EINVAL;
+ }
+
+ /* Does not support disconnected pin, and
+ * not supporting both input/output at same time.
+ */
+ io_flags = flags & (GPIO_INPUT | GPIO_OUTPUT);
+ if ((io_flags == GPIO_DISCONNECTED)
+ || (io_flags == (GPIO_INPUT | GPIO_OUTPUT))) {
+ return -ENOTSUP;
+ }
+
+ /* No open-drain support */
+ if ((flags & GPIO_SINGLE_ENDED) != 0U) {
+ return -ENOTSUP;
+ }
+
+ /* Does not support pull-up/pull-down */
+ if ((flags & (GPIO_PULL_UP | GPIO_PULL_DOWN)) != 0U) {
+ return -ENOTSUP;
+ }
+
+ pin_is_output = (flags & GPIO_OUTPUT) != 0U;
+ if (pin_is_output) {
+ if ((flags & GPIO_OUTPUT_INIT_HIGH) != 0U) {
+ return port_set_bits(dev, BIT(pin));
+ } else if ((flags & GPIO_OUTPUT_INIT_LOW) != 0U) {
+ return port_clear_bits(dev, BIT(pin));
+ }
+ }
+
+ return -ENOTSUP;
+}
+
/**
* @brief Initialization function of creg_gpio
*
