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drivers: ssd16xx: propagate errors where possible

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Fix error propagation on several places.

Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
This commit is contained in:
Johann Fischer 2022-03-09 16:23:54 +01:00 • committed by Carles Cufí
commit a713315f0c
1 changed files with 44 additions and 12 deletions
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56
drivers/display/ssd16xx.c
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@ -66,11 +66,15 @@ static inline int ssd16xx_write_cmd(const struct device *dev, uint8_t cmd,
uint8_t *data, size_t len)
{
const struct ssd16xx_config *config = dev->config;
int err;
struct spi_buf buf = {.buf = &cmd, .len = sizeof(cmd)};
struct spi_buf_set buf_set = {.buffers = &buf, .count = 1};
int err;
err = gpio_pin_set_dt(&config->dc_gpio, 1);
if (err < 0) {
return err;
}
gpio_pin_set_dt(&config->dc_gpio, 1);
err = spi_write_dt(&config->bus, &buf_set);
if (err < 0) {
return err;
@ -79,7 +83,12 @@ static inline int ssd16xx_write_cmd(const struct device *dev, uint8_t cmd,
if (data != NULL) {
buf.buf = data;
buf.len = len;
gpio_pin_set_dt(&config->dc_gpio, 0);
err = gpio_pin_set_dt(&config->dc_gpio, 0);
if (err < 0) {
return err;
}
err = spi_write_dt(&config->bus, &buf_set);
if (err < 0) {
return err;
@ -550,9 +559,17 @@ static int ssd16xx_controller_init(const struct device *dev)
LOG_DBG("");
gpio_pin_set_dt(&config->reset_gpio, 1);
err = gpio_pin_set_dt(&config->reset_gpio, 1);
if (err < 0) {
return err;
}
k_msleep(SSD16XX_RESET_DELAY);
gpio_pin_set_dt(&config->reset_gpio, 0);
err = gpio_pin_set_dt(&config->reset_gpio, 0);
if (err < 0) {
return err;
}
k_msleep(SSD16XX_RESET_DELAY);
ssd16xx_busy_wait(dev);
@ -626,8 +643,9 @@ static int ssd16xx_controller_init(const struct device *dev)
SSD16XX_CTRL2_DISABLE_ANALOG |
SSD16XX_CTRL2_DISABLE_CLK);
if (ssd16xx_load_ws_initial(dev)) {
return -EIO;
err = ssd16xx_load_ws_initial(dev);
if (err < 0) {
return err;
}
err = ssd16xx_clear_cntlr_mem(dev, SSD16XX_CMD_WRITE_RAM, true);
@ -645,8 +663,9 @@ static int ssd16xx_controller_init(const struct device *dev)
ssd16xx_busy_wait(dev);
if (ssd16xx_load_ws_default(dev)) {
return -EIO;
err = ssd16xx_load_ws_default(dev);
if (err < 0) {
return err;
}
return ssd16xx_clear_cntlr_mem(dev, SSD16XX_CMD_WRITE_RAM, true);
@ -655,6 +674,7 @@ static int ssd16xx_controller_init(const struct device *dev)
static int ssd16xx_init(const struct device *dev)
{
const struct ssd16xx_config *config = dev->config;
int err;
LOG_DBG("");
@ -668,21 +688,33 @@ static int ssd16xx_init(const struct device *dev)
return -ENODEV;
}
gpio_pin_configure_dt(&config->reset_gpio, GPIO_OUTPUT_INACTIVE);
err = gpio_pin_configure_dt(&config->reset_gpio, GPIO_OUTPUT_INACTIVE);
if (err < 0) {
LOG_ERR("Failed to configure reset GPIO");
return err;
}
if (!device_is_ready(config->dc_gpio.port)) {
LOG_ERR("DC GPIO device not ready");
return -ENODEV;
}
gpio_pin_configure_dt(&config->dc_gpio, GPIO_OUTPUT_INACTIVE);
err = gpio_pin_configure_dt(&config->dc_gpio, GPIO_OUTPUT_INACTIVE);
if (err < 0) {
LOG_ERR("Failed to configure DC GPIO");
return err;
}
if (!device_is_ready(config->busy_gpio.port)) {
LOG_ERR("Busy GPIO device not ready");
return -ENODEV;
}
gpio_pin_configure_dt(&config->busy_gpio, GPIO_INPUT);
err = gpio_pin_configure_dt(&config->busy_gpio, GPIO_INPUT);
if (err < 0) {
LOG_ERR("Failed to configure busy GPIO");
return err;
}
return ssd16xx_controller_init(dev);
}