Signed-off-by: Tomeu Vizoso <tomeu.viz...@collabora.com>
---
Documentation/devicetree/bindings/mmc/mmc,pwrseq-simple.txt | 2 ++
drivers/mmc/core/pwrseq_simple.c | 8 ++++++++
2 files changed, 10 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/mmc,pwrseq-simple.txt
b/Documentation/devicetree/bindings/mmc/mmc,pwrseq-simple.txt
index 6fe0cd6..b353381 100644
--- a/Documentation/devicetree/bindings/mmc/mmc,pwrseq-simple.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc,pwrseq-simple.txt
@@ -14,10 +14,12 @@ Required properties:
Optional properties:
- reset-gpios : contains a list of GPIO specifiers, though currently only one
specifier is supported.
+- delay : delay to wait after driving the reset gpio active [ms].
Example:
sdhci0_pwrseq {
compatible = "mmc,pwrseq-simple";
reset-gpios = <&gpio1 12 0>;
+ delay = <20>;
}
diff --git a/drivers/mmc/core/pwrseq_simple.c b/drivers/mmc/core/pwrseq_simple.c
index 42d9836..3e521cc 100644
--- a/drivers/mmc/core/pwrseq_simple.c
+++ b/drivers/mmc/core/pwrseq_simple.c
@@ -12,14 +12,17 @@
#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
+#include <linux/of_platform.h>
#include <linux/mmc/host.h>
+#include "core.h"
#include "pwrseq.h"
struct mmc_pwrseq_simple {
struct mmc_pwrseq pwrseq;
struct gpio_desc *reset_gpio;
+ unsigned int delay_ms;
};
static void mmc_pwrseq_simple_pre_power_on(struct mmc_host *host)
@@ -29,6 +32,9 @@ static void mmc_pwrseq_simple_pre_power_on(struct mmc_host
*host)
if (!IS_ERR(pwrseq->reset_gpio))
gpiod_set_value_cansleep(pwrseq->reset_gpio, 1);
+
+ if (pwrseq->delay_ms)
+ mmc_delay(pwrseq->delay_ms);
}
static void mmc_pwrseq_simple_post_power_on(struct mmc_host *host)
@@ -76,6 +82,8 @@ int mmc_pwrseq_simple_alloc(struct mmc_host *host, struct
device *dev)
goto free;
}
+ of_property_read_u32(dev->of_node, "delay", &pwrseq->delay_ms);
+
pwrseq->pwrseq.ops = &mmc_pwrseq_simple_ops;
host->pwrseq = &pwrseq->pwrseq;
--
1.9.3
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