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mmc: core: add a 'doing_init_tune' flag and a 'mmc_doing_tune' helper

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Our driver needs to know when tuning is in progress. 'doing_retune' only
covers re-tuning, not the initial tuning. Add another flag to detect the
initial tuning state and add a helper which tells us if any kind of
tuning is going on. Only implemented for MMC currently because that's
where we need it. SD can be added later if it becomes necessary.

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/20200901150250.26236-3-wsa+renesas@sang-engineering.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wolfram Sang
2020-09-01 17:02:48 +02:00
committed by Ulf Hansson
parent 24fdcb3778
commit 97a7d87e96
2 changed files with 10 additions and 0 deletions
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4
drivers/mmc/core/mmc.c
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@@ -1763,6 +1763,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
goto free_card;
if (mmc_card_hs200(card)) {
host->doing_init_tune = 1;
err = mmc_hs200_tuning(card);
if (err)
goto free_card;
@@ -1770,6 +1772,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
err = mmc_select_hs400(card);
if (err)
goto free_card;
host->doing_init_tune = 0;
} else if (!mmc_card_hs400es(card)) {
/* Select the desired bus width optionally */
err = mmc_select_bus_width(card);