Add optional device-post-power-on parameters to disable post_power_on
function from being called since this breaks some device.
Cc: Tony Lindgren <tony@xxxxxxxxxxx>
Cc: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Matt Ranostay <matt@ranostay.consulting>
---
Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.txt | 2 ++
drivers/mmc/core/pwrseq_simple.c | 7 +++++++
2 files changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.txt b/Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.txt
index bea306d772d1..09fa153f743e 100644
--- a/Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.txt
@@ -24,6 +24,8 @@ Optional properties:
de-asserting the reset-gpios (if any)
- invert-off-state: Invert the power down state for the reset-gpios (if any)
and pwrdn-gpios (if any)
+- disable-post-power-on : Avoid post_power_on function from being called since
+ this breaks some devices
Example:
diff --git a/drivers/mmc/core/pwrseq_simple.c b/drivers/mmc/core/pwrseq_simple.c
index 857dde3e0456..d34084c51f9c 100644
--- a/drivers/mmc/core/pwrseq_simple.c
+++ b/drivers/mmc/core/pwrseq_simple.c
@@ -26,6 +26,7 @@
struct mmc_pwrseq_simple {
struct mmc_pwrseq pwrseq;
bool clk_enabled;
+ bool disable_post_power_on;
bool invert_off_state;
u32 pre_power_on_delay_ms;
u32 post_power_on_delay_ms;
@@ -72,6 +73,9 @@ static void mmc_pwrseq_simple_post_power_on(struct mmc_host *host)
{
struct mmc_pwrseq_simple *pwrseq = to_pwrseq_simple(host->pwrseq);
+ if (pwrseq->disable_post_power_on)
+ return;
+
mmc_pwrseq_simple_set_gpios_value(pwrseq, pwrseq->reset_gpios, 0);
if (pwrseq->post_power_on_delay_ms)
@@ -139,6 +143,9 @@ static int mmc_pwrseq_simple_probe(struct platform_device *pdev)
device_property_read_u32(dev, "post-power-on-delay-ms",
&pwrseq->post_power_on_delay_ms);
+ if (device_property_read_bool(dev, "disable-post-power-on"))
+ pwrseq->disable_post_power_on = true;
+
pwrseq->pwrseq.dev = dev;
pwrseq->pwrseq.ops = &mmc_pwrseq_simple_ops;
pwrseq->pwrseq.owner = THIS_MODULE;
--
2.7.4
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