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Revert "mmc: sdhci-xenon: fix annoying 1.8V regulator warning"

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commit 7e2646ed47542123168d43916b84b954532e5386 upstream.

This reverts commit bb32e1987b.

Commit 1a3ed0dc3594 ("mmc: sdhci-xenon: fix 1.8v regulator stabilization")
contains proper fix for the issue described in commit bb32e1987b ("mmc:
sdhci-xenon: fix annoying 1.8V regulator warning").

Fixes: 8d876bf472 ("mmc: sdhci-xenon: wait 5ms after set 1.8V signal enable")
Cc: stable@vger.kernel.org # 1a3ed0dc3594 ("mmc: sdhci-xenon: fix 1.8v regulator stabilization")
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Marcin Wojtas <mw@semihalf.com>
Link: https://lore.kernel.org/r/20220318141441.32329-1-pali@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pali Rohár
2022-03-18 15:14:41 +01:00
committed by Greg Kroah-Hartman
parent 9de98470db
commit 41a519c05b
1 changed files with 0 additions and 10 deletions
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10
drivers/mmc/host/sdhci-xenon.c
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@@ -240,16 +240,6 @@ static void xenon_voltage_switch(struct sdhci_host *host)
{ {
/* Wait for 5ms after set 1.8V signal enable bit */ /* Wait for 5ms after set 1.8V signal enable bit */
usleep_range(5000, 5500); usleep_range(5000, 5500);
/*
* For some reason the controller's Host Control2 register reports
* the bit representing 1.8V signaling as 0 when read after it was
* written as 1. Subsequent read reports 1.
*
* Since this may cause some issues, do an empty read of the Host
* Control2 register here to circumvent this.
*/
sdhci_readw(host, SDHCI_HOST_CONTROL2);
} }
static const struct sdhci_ops sdhci_xenon_ops = { static const struct sdhci_ops sdhci_xenon_ops = {