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mmc: core: Add HS400 tuning in HS400es initialization

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commit 77e01b49e35f24ebd1659096d5fc5c3b75975545 upstream.

During the initialization to HS400es stage, add a HS400 tuning flow as an
optional process. For Mediatek IP, the HS400es mode requires a specific
tuning to ensure the correct HS400 timing setting.

Signed-off-by: Mengqi Zhang <mengqi.zhang@mediatek.com>
Link: https://lore.kernel.org/r/20231225093839.22931-2-mengqi.zhang@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Cc: "Lin Gui (桂林)" <Lin.Gui@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mengqi Zhang 2023-12-25 17:38:40 +08:00 committed by Greg Kroah-Hartman
parent e62835264d
commit 7b4bd57cf0
1 changed files with 7 additions and 2 deletions
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9
drivers/mmc/core/mmc.c
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@ -1819,8 +1819,13 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
if (err)
goto free_card;
} else if (!mmc_card_hs400es(card)) {
} else if (mmc_card_hs400es(card)) {
if (host->ops->execute_hs400_tuning) {
err = host->ops->execute_hs400_tuning(host, card);
if (err)
goto free_card;
}
} else {
/* Select the desired bus width optionally */
err = mmc_select_bus_width(card);
if (err > 0 && mmc_card_hs(card)) {