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drivers: kscan: fix GT911 support when not using interrupt

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Fix support for GT911 touchscreen driver when not using interrupt.
The controller still requires that the INT pin be set to input in
order to correctly respond to I2C queries.

Also, the GT911 requires that the INT pin is not configured until the
RESET pin has been low at least 10 ms after reset, so add an additional
delay during initialization to account for this.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
This commit is contained in:
Daniel DeGrasse 2023-03-01 14:48:36 -06:00 committed by Carles Cufí
parent d8b8566daf
commit 7daba22c41
1 changed files with 3 additions and 3 deletions
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6
drivers/kscan/kscan_gt911.c
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@ -242,7 +242,8 @@ static int gt911_init(const struct device *dev)
LOG_ERR("Could not configure int GPIO pin");
return r;
}
/* Delay at least 10 ms after power on before we configure gt911 */
k_sleep(K_MSEC(20));
/* reset the device and confgiure the addr mode0 */
gpio_pin_set_dt(&config->rst_gpio, 0);
/* hold down at least 1us, 1ms here */
@ -253,8 +254,6 @@ static int gt911_init(const struct device *dev)
gpio_pin_set_dt(&config->int_gpio, 0);
/* hold down 50ms to make sure the address available */
k_sleep(K_MSEC(50));
#ifdef CONFIG_KSCAN_GT911_INTERRUPT
if (!device_is_ready(config->int_gpio.port)) {
LOG_ERR("Interrupt GPIO controller device not ready");
return -ENODEV;
@ -266,6 +265,7 @@ static int gt911_init(const struct device *dev)
return r;
}
#ifdef CONFIG_KSCAN_GT911_INTERRUPT
r = gpio_pin_interrupt_configure_dt(&config->int_gpio,
GPIO_INT_EDGE_TO_ACTIVE);
if (r < 0) {