This is a note to let you know that I've just added the patch titled
mmc: core: add driver strength selection when selecting hs400es
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mmc-core-add-driver-strength-selection-when-selecting-hs400es.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fb458864d9a78cc433fec7979acbe4078c82d7a8 Mon Sep 17 00:00:00 2001
From: Chanho Min <chanho.min@xxxxxxx>
Date: Tue, 26 Sep 2017 09:03:40 +0900
Subject: mmc: core: add driver strength selection when selecting hs400es
From: Chanho Min <chanho.min@xxxxxxx>
commit fb458864d9a78cc433fec7979acbe4078c82d7a8 upstream.
The driver strength selection is missed and required when selecting
hs400es. So, It is added here.
Fixes: 81ac2af65793ecf ("mmc: core: implement enhanced strobe support")
Signed-off-by: Hankyung Yu <hankyung.yu@xxxxxxx>
Signed-off-by: Chanho Min <chanho.min@xxxxxxx>
Reviewed-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Reviewed-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/core/mmc.c | 36 +++++++++++++++++++-----------------
1 file changed, 19 insertions(+), 17 deletions(-)
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1255,6 +1255,23 @@ out_err:
return err;
}
+static void mmc_select_driver_type(struct mmc_card *card)
+{
+ int card_drv_type, drive_strength, drv_type;
+
+ card_drv_type = card->ext_csd.raw_driver_strength |
+ mmc_driver_type_mask(0);
+
+ drive_strength = mmc_select_drive_strength(card,
+ card->ext_csd.hs200_max_dtr,
+ card_drv_type, &drv_type);
+
+ card->drive_strength = drive_strength;
+
+ if (drv_type)
+ mmc_set_driver_type(card->host, drv_type);
+}
+
static int mmc_select_hs400es(struct mmc_card *card)
{
struct mmc_host *host = card->host;
@@ -1303,6 +1320,8 @@ static int mmc_select_hs400es(struct mmc
goto out_err;
}
+ mmc_select_driver_type(card);
+
/* Switch card to HS400 */
val = EXT_CSD_TIMING_HS400 |
card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
@@ -1336,23 +1355,6 @@ out_err:
return err;
}
-static void mmc_select_driver_type(struct mmc_card *card)
-{
- int card_drv_type, drive_strength, drv_type;
-
- card_drv_type = card->ext_csd.raw_driver_strength |
- mmc_driver_type_mask(0);
-
- drive_strength = mmc_select_drive_strength(card,
- card->ext_csd.hs200_max_dtr,
- card_drv_type, &drv_type);
-
- card->drive_strength = drive_strength;
-
- if (drv_type)
- mmc_set_driver_type(card->host, drv_type);
-}
-
/*
* For device supporting HS200 mode, the following sequence
* should be done before executing the tuning process.
Patches currently in stable-queue which might be from chanho.min@xxxxxxx are
queue-4.9/mmc-core-add-driver-strength-selection-when-selecting-hs400es.patch