Re: [PATCH 1/3] mmc: replacing hardcoded value for runtime PM suspend

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Hi

On 2016/9/1 22:24, alex lemberg wrote:
Add MMC_AUTOSUSPEND_DELAY_MS define

I'm thinking should we expose it to userspace
via sysfs, since I don't know why it should be 3ms, not 4ms, 5ms, etc.



Signed-off-by: alex lemberg <alex.lemberg@xxxxxxxxxxx>
---
 drivers/mmc/card/block.c | 3 ++-
 include/linux/mmc/host.h | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 48a5dd7..f4386ed 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -2610,7 +2610,8 @@ static int mmc_blk_probe(struct mmc_card *card)
 			goto out;
 	}

-	pm_runtime_set_autosuspend_delay(&card->dev, 3000);
+	pm_runtime_set_autosuspend_delay(&card->dev,
+		MMC_RUNTIME_SUSPEND_DELAY_MS);
 	pm_runtime_use_autosuspend(&card->dev);

 	/*
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index aa4bfbf..8cb8218 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -22,6 +22,8 @@
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/pm.h>

+#define MMC_RUNTIME_SUSPEND_DELAY_MS	3000
+
 struct mmc_ios {
 	unsigned int	clock;			/* clock rate */
 	unsigned short	vdd;



--
Best Regards
Shawn Lin

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