[PATCH v2 1/1] mmc: consider cd-gpios in Synopsys DesignWare driver
Heinrich Schuchardt
heinrich.schuchardt at canonical.com
Sun Jul 21 08:59:07 CEST 2024
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 at microchip.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
---
v2:
Check that DM_GPIO is enabled to avoid build failure
on ARC platforms
---
drivers/mmc/snps_dw_mmc.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/mmc/snps_dw_mmc.c b/drivers/mmc/snps_dw_mmc.c
index 9bdbe5070b1..aef05cb932f 100644
--- a/drivers/mmc/snps_dw_mmc.c
+++ b/drivers/mmc/snps_dw_mmc.c
@@ -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)
@@ -106,6 +108,10 @@ 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;
@@ -119,6 +125,9 @@ 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);
}
--
2.45.2
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