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| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2020-04-08 12:46:38 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2020-05-28 12:20:57 +0300 |
| commit | 5fb6bf51f6d153c188087c7fef21f6a8cd481951 (patch) | |
| tree | a80a8421d923ffa1471127e1c89cfd8379cc9312 /drivers/mmc/host/renesas_sdhi.h | |
| parent | ec4fc1acf363985882c37278bfe8881c4e0ec121 (diff) | |
| download | linux-5fb6bf51f6d153c188087c7fef21f6a8cd481951.tar.xz | |
mmc: renesas_sdhi: improve TAP selection if all TAPs are good
When tuning HS400, if all TAPS are good, we can utilize the SMPCMP
register to select the optimal TAP. For that, we populate a second
bitmap with SMPCMP results and query it in case the regular bitmap is
full (= all good).
Signed-off-by: Masaharu Hayakawa <masaharu.hayakawa.ry@renesas.com>
Signed-off-by: Takeshi Saito <takeshi.saito.xv@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20200408094638.10375-4-wsa+renesas@sang-engineering.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/renesas_sdhi.h')
| -rw-r--r-- | drivers/mmc/host/renesas_sdhi.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h index 2a4c83a5f32e..12d8016672b0 100644 --- a/drivers/mmc/host/renesas_sdhi.h +++ b/drivers/mmc/host/renesas_sdhi.h @@ -61,6 +61,8 @@ struct renesas_sdhi { /* Tuning values: 1 for success, 0 for failure */ DECLARE_BITMAP(taps, BITS_PER_LONG); + /* Sampling data comparison: 1 for match, 0 for mismatch */ + DECLARE_BITMAP(smpcmp, BITS_PER_LONG); unsigned int tap_num; unsigned long tap_set; }; |