mmc: mxs-mmc: Add wp-inverted property
The write-protect GPIO is inverted on some boards. Handle such case.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index 2247c50..a51f930 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -164,16 +164,23 @@
spinlock_t lock;
int sdio_irq_en;
int wp_gpio;
+ bool wp_inverted;
};
static int mxs_mmc_get_ro(struct mmc_host *mmc)
{
struct mxs_mmc_host *host = mmc_priv(mmc);
+ int ret;
if (!gpio_is_valid(host->wp_gpio))
return -EINVAL;
- return gpio_get_value(host->wp_gpio);
+ ret = gpio_get_value(host->wp_gpio);
+
+ if (host->wp_inverted)
+ ret = !ret;
+
+ return ret;
}
static int mxs_mmc_get_cd(struct mmc_host *mmc)
@@ -708,6 +715,7 @@
int ret = 0, irq_err, irq_dma;
dma_cap_mask_t mask;
struct regulator *reg_vmmc;
+ enum of_gpio_flags flags;
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
@@ -796,7 +804,10 @@
mmc->caps |= MMC_CAP_4_BIT_DATA;
else if (bus_width == 8)
mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA;
- host->wp_gpio = of_get_named_gpio(np, "wp-gpios", 0);
+ host->wp_gpio = of_get_named_gpio_flags(np, "wp-gpios", 0,
+ &flags);
+ if (flags & OF_GPIO_ACTIVE_LOW)
+ host->wp_inverted = 1;
} else {
if (pdata->flags & SLOTF_8_BIT_CAPABLE)
mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA;