[PATCH] Ask a question about why can't use GPIOAO: GPIO_TEST_N

[Zhang Ning]

first this is not a code review, just ask a question.

I started to enable MagicBox M16S, and sent patches for review.

but leds are not enabled.

I have tried, and found gpioao: GPIO_TEST_N can control led on off.

thus I add it to dts:

        leds {
                compatible = "gpio-leds";

                led-white {
                        color = <LED_COLOR_ID_WHITE>;
                        function = LED_FUNCTION_POWER;
                        gpios = <&gpio_ao GPIO_TEST_N GPIO_ACTIVE_HIGH>;
                        default-state = "keep";
                };
        };

but failed with error -22.

and simply change GPIO_TEST_N to GPIOAO_2, no error.

thus find pinctrl driver doesn't allow to use this gpio.

why?

Signed-off-by: Zhang Ning <zhangn1985 at qq.com>
---
 drivers/pinctrl/meson/pinctrl-meson-gxl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/meson/pinctrl-meson-gxl.c b/drivers/pinctrl/meson/pinctrl-meson-gxl.c
index 51408996255b..fb5fa88b30c7 100644
--- a/drivers/pinctrl/meson/pinctrl-meson-gxl.c
+++ b/drivers/pinctrl/meson/pinctrl-meson-gxl.c
@@ -820,7 +820,7 @@ static struct meson_bank meson_gxl_periphs_banks[] = {
 
 static struct meson_bank meson_gxl_aobus_banks[] = {
 	/*   name    first      last      irq	pullen  pull    dir     out     in  */
-	BANK("AO",   GPIOAO_0,  GPIOAO_9, 0, 9, 0,  16, 0, 0,   0,  0,  0, 16,  1,  0),
+	BANK("AO",   GPIOAO_0,  GPIO_TEST_N, 0, 9, 0,  16, 0, 0,   0,  0,  0, 16,  1,  0),
 };
 
 static struct meson_pinctrl_data meson_gxl_periphs_pinctrl_data = {
-- 
2.35.1