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drivers: sdhc: enable pwr-gpios property within SPI SDHC driver

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Enable SPI SDHC driver to manage card power via pwr-gpios property.
Control for this property was previously partially implemented. When
this property is present, the SPI SDHC driver will use it to control
power to the SD card.

Power is toggled during SD init, so this power control can make SD init
more reliable as the power toggle will insure the SD card state is reset.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
This commit is contained in:
Daniel DeGrasse 2023-07-20 10:11:54 -05:00 committed by Fabio Baltieri
parent 3a0615d048
commit f9daa0397c
2 changed files with 19 additions and 1 deletions
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13
drivers/sdhc/sdhc_spi.c
View file

@ -738,14 +738,25 @@ static int sdhc_spi_init(const struct device *dev)
{
const struct sdhc_spi_config *cfg = dev->config;
struct sdhc_spi_data *data = dev->data;
int ret = 0;
if (!device_is_ready(cfg->spi_dev)) {
return -ENODEV;
}
if (cfg->pwr_gpio.port) {
if (!gpio_is_ready_dt(&cfg->pwr_gpio)) {
return -ENODEV;
}
ret = gpio_pin_configure_dt(&cfg->pwr_gpio, GPIO_OUTPUT_INACTIVE);
if (ret != 0) {
LOG_ERR("Could not configure power gpio (%d)", ret);
return ret;
}
}
data->power_mode = SDHC_POWER_OFF;
data->spi_cfg = &data->cfg_a;
data->spi_cfg->frequency = 0;
return 0;
return ret;
}
static struct sdhc_driver_api sdhc_spi_api = {

7
dts/bindings/sdhc/zephyr,sdhc-spi-slot.yaml
View file

@ -27,4 +27,11 @@ properties:
capture will occur on low to high transition and high to low if
this option is not set (default).
pwr-gpios:
type: phandle-array
description: |
Power pin
This pin defaults to active high when consumed by the SPI SDHC driver.
It can be used to toggle card power via an external control circuit
bus: sd