Hi,
I need two GPIO's on IMX6 SLEVK board. I have Identified one GPIO (LCD_DAT0) (GPIO_2_20). But When I am trying to toggle this GPIO I didn't observe any change in the output on Analyser. I have written the following code for toggling GPIO. Could some help me in toggling GPIO.
| #define MX6_PAD_EIM_ADDR18_GPIO_2_20 | IOMUX_PAD(0x04B8, 0x01B0,5, 0x0000, 0, NO_PAD_CTRL) |
|
| #define MX6SL_PAD_I2C1_SCL_GPIO_3_12 | IOMUX_PAD(0x044C, 0x015C,5, 0x0000, 0, NO_PAD_CTRL) |
#define GPIO2_20 (unsigned int)((1*32)+20)
#define GPIO3_12 (unsigned int)((2*32)+12)
int setup_imx_gpio(void);
int setup_imx_gpio()
{
// uint32 pad_gpio;
iomux_v3_cfg_t pad_gpio;
signed int res = 1;
// gpio code for I2C1_SCL U1 IC AC13
gpio_free(GPIO3_12);
res = gpio_request(GPIO3_12, "GPIO3_12");
if (res)
{
printk("Failed in Setup the GPIO3_12, error=%d\n", res);
return res;
}
pad_gpio = (iomux_v3_cfg_t) MX6SL_PAD_I2C1_SCL_GPIO_3_12;
mxc_iomux_v3_setup_pad(pad_gpio);
res = gpio_direction_output(GPIO3_12, 0);
// res = gpio_direction_input(GPIO3_12);
if (res)
{
printk("Failed in Setup Direction for the GPIO3_12, error=%d\n", res);
return res;
}
// gpio code for LCD_DAT0 J13-62
gpio_free(GPIO2_20);
res = gpio_request(GPIO2_20, "GPIO2_20");
if (res)
{
printk("Failed in Setup the GPIO2_20, error=%d\n", res);
return res;
}
pad_gpio = (iomux_v3_cfg_t) MX6_PAD_EIM_ADDR18_GPIO_2_20;
mxc_iomux_v3_setup_pad(pad_gpio);
// res = gpio_direction_input(GPIO2_20);
res = gpio_direction_output(GPIO2_20, 1); /* I need to Make this GPIO High by default*/
if (res)
{
printk("Failed in Setup Direction for the GPIO2_20, error=%d\n", res);
return res;
}
return 0;
}
#endif
