pinctrl: bcm2835: Add support for output-low output-high properties

Properties to set initial value of pin output buffer.
This can be useful for configure hardware in overlay files, and in early
boot for checking it states in QA sanity tests.

Signed-off-by: Matheus Castello <matheus@castello.eng.br>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
index a0b1f5f9b8aa97f86725e7de86d4ae87400c5989..136ccaf53df8d88cc5cc409f01cea24b40c50edd 100644 (file)
--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -965,6 +965,11 @@ static int bcm2835_pinconf_set(struct pinctrl_dev *pctldev,
                        bcm2835_pull_config_set(pc, pin, BCM2835_PUD_UP);
                        break;
 
+               /* Set output-high or output-low */
+               case PIN_CONFIG_OUTPUT:
+                       bcm2835_gpio_set_bit(pc, arg ? GPSET0 : GPCLR0, pin);
+                       break;
+
                default:
                        return -EINVAL;