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display: ili9340: Make reset gpio definition optional.

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ILI9340 may not need a reset signal pin for certain LCD shields.

Signed-off-by: Bernard Lee <bernard.lee@nordicsemi.no>
This commit is contained in:
Bernard Lee 2019-03-06 13:14:52 +08:00 • committed by Anas Nashif
commit 7ab3bc57b5
1 changed files with 6 additions and 0 deletions
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6
drivers/display/display_ili9340.c
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@ -17,7 +17,9 @@ LOG_MODULE_REGISTER(display_ili9340);
#include <string.h> #include <string.h>
struct ili9340_data { struct ili9340_data {
#ifdef DT_ILITEK_ILI9340_0_RESET_GPIOS_CONTROLLER
struct device *reset_gpio; struct device *reset_gpio;
#endif
struct device *command_data_gpio; struct device *command_data_gpio;
struct device *spi_dev; struct device *spi_dev;
struct spi_config spi_config; struct spi_config spi_config;
@ -61,6 +63,7 @@ static int ili9340_init(struct device *dev)
data->spi_config.cs = NULL; data->spi_config.cs = NULL;
#endif #endif
#ifdef DT_ILITEK_ILI9340_0_RESET_GPIOS_CONTROLLER
data->reset_gpio = data->reset_gpio =
device_get_binding(DT_ILITEK_ILI9340_0_RESET_GPIOS_CONTROLLER); device_get_binding(DT_ILITEK_ILI9340_0_RESET_GPIOS_CONTROLLER);
if (data->reset_gpio == NULL) { if (data->reset_gpio == NULL) {
@ -70,6 +73,7 @@ static int ili9340_init(struct device *dev)
gpio_pin_configure(data->reset_gpio, DT_ILITEK_ILI9340_0_RESET_GPIOS_PIN, gpio_pin_configure(data->reset_gpio, DT_ILITEK_ILI9340_0_RESET_GPIOS_PIN,
GPIO_DIR_OUT); GPIO_DIR_OUT);
#endif
data->command_data_gpio = data->command_data_gpio =
device_get_binding(DT_ILITEK_ILI9340_0_CMD_DATA_GPIOS_CONTROLLER); device_get_binding(DT_ILITEK_ILI9340_0_CMD_DATA_GPIOS_CONTROLLER);
@ -81,6 +85,7 @@ static int ili9340_init(struct device *dev)
gpio_pin_configure(data->command_data_gpio, DT_ILITEK_ILI9340_0_CMD_DATA_GPIOS_PIN, gpio_pin_configure(data->command_data_gpio, DT_ILITEK_ILI9340_0_CMD_DATA_GPIOS_PIN,
GPIO_DIR_OUT); GPIO_DIR_OUT);
#ifdef DT_ILITEK_ILI9340_0_RESET_GPIOS_CONTROLLER
LOG_DBG("Resetting display driver"); LOG_DBG("Resetting display driver");
gpio_pin_write(data->reset_gpio, DT_ILITEK_ILI9340_0_RESET_GPIOS_PIN, 1); gpio_pin_write(data->reset_gpio, DT_ILITEK_ILI9340_0_RESET_GPIOS_PIN, 1);
k_sleep(1); k_sleep(1);
@ -88,6 +93,7 @@ static int ili9340_init(struct device *dev)
k_sleep(1); k_sleep(1);
gpio_pin_write(data->reset_gpio, DT_ILITEK_ILI9340_0_RESET_GPIOS_PIN, 1); gpio_pin_write(data->reset_gpio, DT_ILITEK_ILI9340_0_RESET_GPIOS_PIN, 1);
k_sleep(5); k_sleep(5);
#endif
LOG_DBG("Initializing LCD"); LOG_DBG("Initializing LCD");
ili9340_lcd_init(data); ili9340_lcd_init(data);