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Revert "mmc: sdhci-xenon: fix annoying 1.8V regulator warning"
author
Pali Rohár
<pali@kernel.org>
Fri, 18 Mar 2022 14:14:41 +0000
(15:14 +0100)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Wed, 20 Apr 2022 07:08:29 +0000
(09:08 +0200)
commit
7e2646ed47542123168d43916b84b954532e5386
upstream.
This reverts commit
bb32e1987bc55ce1db400faf47d85891da3c9b9f
.
Commit
1a3ed0dc3594
("mmc: sdhci-xenon: fix 1.8v regulator stabilization")
contains proper fix for the issue described in commit
bb32e1987bc5
("mmc:
sdhci-xenon: fix annoying 1.8V regulator warning").
Fixes:
8d876bf472db
("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>
drivers/mmc/host/sdhci-xenon.c
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diff --git
a/drivers/mmc/host/sdhci-xenon.c
b/drivers/mmc/host/sdhci-xenon.c
index ca34fa424634fce86fe1b53d046bd5d161d06a51..bd7d159368367480a523703d113f4a55b9abba4c 100644
(file)
--- a/
drivers/mmc/host/sdhci-xenon.c
+++ b/
drivers/mmc/host/sdhci-xenon.c
@@
-243,16
+243,6
@@
static void xenon_voltage_switch(struct sdhci_host *host)
{
/* Wait for 5ms after set 1.8V signal enable bit */
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 = {