I want to read gpio input value from u-boot.
--------------------------------------------------------------------------------------------------------
static iomux_cfg_t const_board_pad[] = {
MX7ULP_PAD_PTE6__PTE6 | MUX_PAD_CTRL(PAD_CTL_IBE_ENABLE),
MX7ULP_PAD_PTE7__PTE7 | MUX_PAD_CTRL(PAD_CTL_IBE_ENABLE),
MX7ULP_PAD_PTE10__PTE10 | MUX_PAD_CTRL(PAD_CTL_IBE_ENABLE),
MX7ULP_PAD_PTE11__PTE11 | MUX_PAD_CTRL(PAD_CTL_IBE_ENABLE),
};
int show_hardware_version(void);
#define HW0_GPIO IMX_GPIO_NR(5, 7)
#define HW1_GPIO IMX_GPIO_NR(5, 6)
#define HW2_GPIO IMX_GPIO_NR(5, 10)
#define HW3_GPIO IMX_GPIO_NR(5, 11)
mx7ulp_iomux_setup_multiple_pads(const_board_pad, ARRAY_SIZE(const_board_pad));
if (gpio_request(HW0_GPIO, "hw0"))
printf("request error hw0\n");
if (gpio_request(HW1_GPIO, "hw1"))
printf("request error hw1\n");
if (gpio_request(HW2_GPIO, "hw2"))
printf("request error hw2\n");
if (gpio_request(HW3_GPIO, "hw3"))
printf("request error hw3\n");
gpio_direction_input(HW0_GPIO);
gpio_direction_input(HW1_GPIO);
gpio_direction_input(HW2_GPIO);
gpio_direction_input(HW3_GPIO);
hw_pin[0] = gpio_get_value(HW0_GPIO);
hw_pin[1] = gpio_get_value(HW1_GPIO);
hw_pin[2] = gpio_get_value(HW2_GPIO);
hw_pin[3] = gpio_get_value(HW3_GPIO);
printf("####################### %d %d %d %d\n", hw_pin[0], hw_pin[1], hw_pin[2], hw_pin[3]);
-------------------------------------------------------------------
PMC_1V8 pull up is applied to MX7ULP_PAD_PTE6__PTE 6 pin.
However, all gpio values are displayed as 0 .
The scope shows 1.8v high, but the value doesn't change.
Conversely, after setting the output, it was confirmed that it is controlled.
--------------------------------------
md 40AC0118 1
40ac0118: 00010100
-------------------------------------
I checked the registry value in u boot and there was no problem.
But when I read the values below, there is no change.
--------------------------------------
md 400f0090 1
400f0090: 00000000
---------------------------------------
I tried to read the value in various ways, but it didn't solve the problem.
Can you tell me how to solve it?
