mmc: renesas_sdhi: improve TAP selection if all TAPs are good

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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>

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Wolfram Sang 2020-04-08 11:46:38 +02:00 • committed by Ulf Hansson

parent ec4fc1acf3

commit 5fb6bf51f6

2 changed files with 25 additions and 3 deletions

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2

drivers/mmc/host/renesas_sdhi.h

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26

drivers/mmc/host/renesas_sdhi_core.c

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