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mmc: consider cd-gpios in Synopsys DesignWare driver

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The JH7110 SoC uses a GPIO for card detect.

* In the of_to_plat function check if a cd-gpios definition exists and
  request the GPIO.
* In the getcd function return the GPIO value in this case.

Reported-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt 2024-07-21 08:59:07 +02:00 • committed by Tom Rini
parent e24c8cc658
commit cbaf53fdf1
1 changed files with 9 additions and 0 deletions
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9
drivers/mmc/snps_dw_mmc.c
View file

@ -12,6 +12,7 @@
#include <dwmmc.h>
#include <errno.h>
#include <fdtdec.h>
#include <asm/gpio.h>
#include <dm/device_compat.h>
#include <linux/libfdt.h>
#include <linux/err.h>
@ -29,6 +30,7 @@ struct snps_dwmci_plat {
struct snps_dwmci_priv_data {
struct dwmci_host host;
u32 f_max;
struct gpio_desc cd_gpio;
};
static int snps_dwmmc_clk_setup(struct udevice *dev)
@ -104,6 +106,10 @@ static int snps_dwmmc_of_to_plat(struct udevice *dev)
if (!ret && priv->f_max < CLOCK_MIN)
return -EINVAL;
if (CONFIG_IS_ENABLED(DM_GPIO))
gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio,
GPIOD_IS_IN);
host->fifo_mode = dev_read_bool(dev, "fifo-mode");
host->name = dev->name;
host->dev_index = 0;
@ -117,6 +123,9 @@ int snps_dwmmc_getcd(struct udevice *dev)
struct snps_dwmci_priv_data *priv = dev_get_priv(dev);
struct dwmci_host *host = &priv->host;
if (CONFIG_IS_ENABLED(DM_GPIO) && dm_gpio_is_valid(&priv->cd_gpio))
return dm_gpio_get_value(&priv->cd_gpio);
return !(dwmci_readl(host, DWMCI_CDETECT) & 1);
}