* [PATCH] mmc: core: add driver strength selection when selecting hs400es
@ 2017-09-25 8:56 Chanho Min
2017-09-25 10:34 ` Adrian Hunter
0 siblings, 1 reply; 2+ messages in thread
From: Chanho Min @ 2017-09-25 8:56 UTC (permalink / raw)
To: Ulf Hansson, Shawn Lin, Linus Walleij, Adrian Hunter, Uri Yanai
Cc: linux-mmc, linux-kernel, Hankyung Yu, Gunho Lee, Chanho Min
From: "hankyung.yu" <hankyung.yu@lge.com>
The drive strength setting is missed and required when selecting
hs400es. So, It is added here.
Signed-off-by: Hankyung Yu <hankyung.yu@lge.com>
Signed-off-by: Chanho Min <chanho.min@lge.com>
---
drivers/mmc/core/mmc.c | 36 +++++++++++++++++++-----------------
1 file changed, 19 insertions(+), 17 deletions(-)
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 07516f3..bc7586c 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1249,6 +1249,23 @@ 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;
@@ -1300,6 +1317,8 @@ static int mmc_select_hs400es(struct mmc_card *card)
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;
@@ -1333,23 +1352,6 @@ 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.
--
2.1.4
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] mmc: core: add driver strength selection when selecting hs400es
2017-09-25 8:56 [PATCH] mmc: core: add driver strength selection when selecting hs400es Chanho Min
@ 2017-09-25 10:34 ` Adrian Hunter
0 siblings, 0 replies; 2+ messages in thread
From: Adrian Hunter @ 2017-09-25 10:34 UTC (permalink / raw)
To: Chanho Min, Ulf Hansson, Shawn Lin, Linus Walleij, Uri Yanai
Cc: linux-mmc, linux-kernel, Hankyung Yu, Gunho Lee
On 25/09/17 11:56, Chanho Min wrote:
> From: "hankyung.yu" <hankyung.yu@lge.com>
>
> The drive strength setting is missed and required when selecting
> hs400es. So, It is added here.
>
> Signed-off-by: Hankyung Yu <hankyung.yu@lge.com>
> Signed-off-by: Chanho Min <chanho.min@lge.com>
Looks right. I guess we should add:
Fixes: 81ac2af65793ecf ("mmc: core: implement enhanced strobe support")
Cc: stable@vger.kernel.org
> ---
> drivers/mmc/core/mmc.c | 36 +++++++++++++++++++-----------------
> 1 file changed, 19 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
> index 07516f3..bc7586c 100644
> --- a/drivers/mmc/core/mmc.c
> +++ b/drivers/mmc/core/mmc.c
> @@ -1249,6 +1249,23 @@ 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;
> @@ -1300,6 +1317,8 @@ static int mmc_select_hs400es(struct mmc_card *card)
> 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;
> @@ -1333,23 +1352,6 @@ 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.
>
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2017-09-25 10:41 UTC | newest]
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