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driver: input: gt911: Support case that no dedicated reset pin

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On some boards, there is not dedicated reset pin for GT911, it might
be the same pin with display IC, or might be tighted to a high level
voltage.
This patch makes the rst_gpio can be empty.

Signed-off-by: Jason Yu <zejiang.yu@nxp.com>
This commit is contained in:
Jason Yu 2024-03-11 13:08:54 +09:00 committed by Fabio Baltieri
parent 643c033a7f
commit d5b1a7d929
1 changed files with 20 additions and 16 deletions
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36
drivers/input/input_gt911.c
View file

@ -225,15 +225,17 @@ static int gt911_init(const struct device *dev)
return -ENODEV;
}
if (!gpio_is_ready_dt(&config->rst_gpio)) {
LOG_ERR("Reset GPIO controller device not ready");
return -ENODEV;
}
if (config->rst_gpio.port != NULL) {
if (!gpio_is_ready_dt(&config->rst_gpio)) {
LOG_ERR("Reset GPIO controller device not ready");
return -ENODEV;
}
r = gpio_pin_configure_dt(&config->rst_gpio, GPIO_OUTPUT_ACTIVE);
if (r < 0) {
LOG_ERR("Could not configure reset GPIO pin");
return r;
r = gpio_pin_configure_dt(&config->rst_gpio, GPIO_OUTPUT_ACTIVE);
if (r < 0) {
LOG_ERR("Could not configure reset GPIO pin");
return r;
}
}
if (config->alt_addr == 0x0) {
@ -252,13 +254,15 @@ static int gt911_init(const struct device *dev)
}
/* 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, 1);
/* hold down at least 1us, 1ms here */
k_sleep(K_MSEC(1));
gpio_pin_set_dt(&config->rst_gpio, 0);
/* hold down at least 5ms. This is the point the INT pin must be low. */
k_sleep(K_MSEC(5));
if (config->rst_gpio.port != NULL) {
/* reset the device and confgiure the addr mode0 */
gpio_pin_set_dt(&config->rst_gpio, 1);
/* hold down at least 1us, 1ms here */
k_sleep(K_MSEC(1));
gpio_pin_set_dt(&config->rst_gpio, 0);
/* hold down at least 5ms. This is the point the INT pin must be low. */
k_sleep(K_MSEC(5));
}
/* hold down 50ms to make sure the address available */
k_sleep(K_MSEC(50));
@ -359,7 +363,7 @@ static int gt911_init(const struct device *dev)
#define GT911_INIT(index) \
static const struct gt911_config gt911_config_##index = { \
.bus = I2C_DT_SPEC_INST_GET(index), \
.rst_gpio = GPIO_DT_SPEC_INST_GET(index, reset_gpios), \
.rst_gpio = GPIO_DT_SPEC_INST_GET_OR(index, reset_gpios, {0}), \
.int_gpio = GPIO_DT_SPEC_INST_GET(index, irq_gpios), \
.alt_addr = DT_INST_PROP_OR(index, alt_addr, 0), \
}; \