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mmc: meson-gx: fix rx phase reset

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Resetting the phase when POWER_ON is set the set_ios() call means that the
phase is reset almost every time the set_ios() is called, while the
expected behavior was to reset the phase on a power cycle.

This had gone unnoticed until now because in all mode (except hs400) the
tuning is done after the last to set_ios(). In such case, the tuning
result is used anyway.  In HS400, there are a few calls to set_ios() after
the tuning is done, overwriting the tuning result.

Resetting the phase on POWER_UP instead of POWER_ON solve the problem.

Fixes: d341ca88eead ("mmc: meson-gx: rework tuning function")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Jerome Brunet 2017-10-02 14:27:42 +02:00 committed by Ulf Hansson
parent ca3dcd3ff5
commit 3e2b0af411
1 changed files with 4 additions and 2 deletions
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6
drivers/mmc/host/meson-gx-mmc.c
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@ -745,6 +745,10 @@ static void meson_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
case MMC_POWER_UP:
if (!IS_ERR(mmc->supply.vmmc))
mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd);
/* Reset rx phase */
clk_set_phase(host->rx_clk, 0);
break;
case MMC_POWER_ON:
@ -758,8 +762,6 @@ static void meson_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
host->vqmmc_enabled = true;
}
/* Reset rx phase */
clk_set_phase(host->rx_clk, 0);
break;
}