gpio: support gpio set/get pull status
On some platform gpio can set/get pull status when input, add these
function so we can set/get gpio pull status when need it. And they are
optional function.
diff --git a/drivers/gpio/gpio.c b/drivers/gpio/gpio.c
index c06172f..ef6bb9c 100644
--- a/drivers/gpio/gpio.c
+++ b/drivers/gpio/gpio.c
@@ -80,6 +80,26 @@
ops->set_value(gpio, value);
}
+void gpio_set_pull(int gpio, int pull)
+{
+ assert(ops);
+ assert(ops->set_pull != 0);
+ assert((pull == GPIO_PULL_NONE) || (pull == GPIO_PULL_UP) ||
+ (pull == GPIO_PULL_DOWN));
+ assert(gpio >= 0);
+
+ ops->set_pull(gpio, pull);
+}
+
+int gpio_get_pull(int gpio)
+{
+ assert(ops);
+ assert(ops->get_pull != 0);
+ assert(gpio >= 0);
+
+ return ops->get_pull(gpio);
+}
+
/*
* Initialize the gpio. The fields in the provided gpio
* ops pointer must be valid.