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drivers: display: st7735r: add hold-CS transmit()

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ST7735S support (separate commits) needs this.

Signed-off-by: David Lamparter <equinox@diac24.net>
This commit is contained in:
David Lamparter 2023-09-10 16:00:57 +02:00 • committed by Carles Cufí
commit 64c46ae56a
1 changed files with 15 additions and 3 deletions
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18
drivers/display/display_st7735r.c
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@ -75,8 +75,8 @@ static void st7735r_set_cmd(const struct device *dev, int is_cmd)
gpio_pin_set_dt(&config->cmd_data, is_cmd);
}
static int st7735r_transmit(const struct device *dev, uint8_t cmd,
const uint8_t *tx_data, size_t tx_count)
static int st7735r_transmit_hold(const struct device *dev, uint8_t cmd,
const uint8_t *tx_data, size_t tx_count)
{
const struct st7735r_config *config = dev->config;
struct spi_buf tx_buf = { .buf = &cmd, .len = 1 };
@ -102,6 +102,17 @@ static int st7735r_transmit(const struct device *dev, uint8_t cmd,
return 0;
}
static int st7735r_transmit(const struct device *dev, uint8_t cmd,
const uint8_t *tx_data, size_t tx_count)
{
const struct st7735r_config *config = dev->config;
int ret;
ret = st7735r_transmit_hold(dev, cmd, tx_data, tx_count);
spi_release_dt(&config->bus);
return ret;
}
static int st7735r_exit_sleep(const struct device *dev)
{
int ret;
@ -539,7 +550,8 @@ static const struct display_driver_api st7735r_api = {
#define ST7735R_INIT(inst) \
const static struct st7735r_config st7735r_config_ ## inst = { \
.bus = SPI_DT_SPEC_INST_GET( \
inst, SPI_OP_MODE_MASTER | SPI_WORD_SET(8), 0), \
inst, SPI_OP_MODE_MASTER | SPI_WORD_SET(8) | \
SPI_HOLD_ON_CS | SPI_LOCK_ON, 0), \
.cmd_data = GPIO_DT_SPEC_INST_GET(inst, cmd_data_gpios), \
.reset = GPIO_DT_SPEC_INST_GET_OR(inst, reset_gpios, {}), \
.width = DT_INST_PROP(inst, width), \