Marek Behún a923cdf088 mmc: sdhci-xenon: fix annoying 1.8V regulator warning ... commit bb32e1987b upstream. For some reason the Host Control2 register of the Xenon SDHCI controller sometimes reports the bit representing 1.8V signaling as 0 when read after it was written as 1. Subsequent read reports 1. This causes the sdhci_start_signal_voltage_switch function to report 1.8V regulator output did not become stable When CONFIG_PM is enabled, the host is suspended and resumend many times, and in each resume the switch to 1.8V is called, and so the kernel log reports this message annoyingly often. Do an empty read of the Host Control2 register in Xenon's .voltage_switch method to circumvent this. This patch fixes this particular problem on Turris MOX. Signed-off-by: Marek Behún <marek.behun@nic.cz> Fixes: 8d876bf472 ("mmc: sdhci-xenon: wait 5ms after set 1.8V...") Cc: stable@vger.kernel.org # v4.16+ Link: https://lore.kernel.org/r/20200420080444.25242-1-marek.behun@nic.cz Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-05-05 19:15:49 +02:00
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core	mmc: core: fix wl1251 sdio quirks	2020-01-27 14:46:52 +01:00
host	mmc: sdhci-xenon: fix annoying 1.8V regulator warning	2020-05-05 19:15:49 +02:00
Kconfig	mmc: Kconfig: downgrade CONFIG_MMC_DEBUG for host drivers only	2017-08-30 14:01:34 +02:00
Makefile	mmc: Kconfig: downgrade CONFIG_MMC_DEBUG for host drivers only	2017-08-30 14:01:34 +02:00