AM6548: Control GPIO in uboot

Hi TI,

Sorry to post again.

From former post below, I thought I have no question. But I was wrong!

https://e2e.ti.com/support/processors/f/processors-forum/983550/am6548-read-write-gpio-in-uboot/3635938?tisearch=e2e-sitesearch&keymatch=%25252520user%2525253A445865#3635938

I did the gpio test to flash the LED again.

1. In k3-am654-base-board.dts, I add the test gpio.

gpio_test: gpio_test {
compatible = "gpio-test";
pintest-gpio = <&wkup_gpio0 25 GPIO_ACTIVE_HIGH>;
u-boot,dm-spl;
};

&cbass_wakeup {
wkup_pmx0: pinmux@4301c000 {
compatible = "pinctrl-single";
reg = <0x4301c000 0x118>;
#pinctrl-cells = <1>;
pinctrl-single,register-width = <32>;
pinctrl-single,function-mask = <0xffffffff>;
};

wkup_gpio0: wkup_gpio0@42110000 {
compatible = "ti,am654-gpio", "ti,keystone-gpio";
reg = <0x42110000 0x100>;
gpio-controller;
#gpio-cells = <2>;
ti,ngpio = <56>;
ti,davinci-gpio-unbanked = <0>;
clocks = <&k3_clks 59 0>;
clock-names = "gpio";
u-boot,dm-spl;
};
};

&wkup_pmx0 {
pinctrl-names = "default";
pinctrl-0 = <&gpio_identify_pins>;

gpio_identify_pins: gpio_identify_pins {

pinctrl-single,pins = <
AM65X_WKUP_IOPAD(0x0034, PIN_OUTPUT, 7) /* (T1) MCU_OSPI1_CLK.WKUP_GPIO0_25 LED-ERR*/
>;
u-boot,dm-spl;
};
};

And I add my test function in board_late_init().

int gpio_control_test(void)
{
struct gpio_desc pin_gpio;
int node, pin0Val, ret;

node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "gpio-test");

ret = gpio_request_by_name_nodev(offset_to_ofnode(node), "pintest-gpio", 0, &pin_gpio, GPIOD_IS_OUT);

if (dm_gpio_is_valid(&pin_gpio))
{
pin0Val = dm_gpio_get_value(&pin_gpio);
printf("Eric: gpio_control_test dm_gpio_get_value value=%d [1]\r\n", pin0Val);

dm_gpio_set_dir_flags(&pin_gpio, GPIOD_IS_OUT);
dm_gpio_set_value(&pin_gpio, 1);
mdelay(1000);
pin0Val = dm_gpio_get_value(&pin_gpio);
printf("Eric: gpio_control_test dm_gpio_get_value value=%d [2]\r\n", pin0Val);

dm_gpio_set_value(&pin_gpio, 0);
mdelay(1000);
pin0Val = dm_gpio_get_value(&pin_gpio);
printf("Eric: gpio_control_test dm_gpio_get_value value=%d [3]\r\n", pin0Val);

dm_gpio_set_value(&pin_gpio, 1);
mdelay(1000);
pin0Val = dm_gpio_get_value(&pin_gpio);
printf("Eric: gpio_control_test dm_gpio_get_value value=%d [4] \r\n", pin0Val ? LEDST_ON : LEDST_OFF);
}
else
printf("Eric: gpio_control_test dm_gpio_is_valid error!! \r\n");

return 1;

}

In my program, I want to flash the LED as on, off and on again. And it did work as I want.

However, when I look into my log, I always get the value as 0 from dm_gpio_get_value.

Is there anything I missed?

Thanks.

Eric