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authorMichael Walle <michael@walle.cc>2016-11-15 11:13:16 +0100
committerUlf Hansson <ulf.hansson@linaro.org>2016-11-18 14:41:47 +0100
commitb0921d5c9ed6ffa8a4d6afc5ee5f136b87445f14 (patch)
treef9566c3945231eea57649951897b82d461c0db4d /Makefile
parenta25f0944ba9b1d8a6813fd6f1a86f1bd59ac25a6 (diff)
mmc: sdhci-of-esdhc: fixup PRESENT_STATE read
Since commit 87a18a6a5652 ("mmc: mmc: Use ->card_busy() to detect busy cards in __mmc_switch()") the ESDHC driver is broken: mmc0: Card stuck in programming state! __mmc_switch mmc0: error -110 whilst initialising MMC card Since this commit __mmc_switch() uses ->card_busy(), which is sdhci_card_busy() for the esdhc driver. sdhci_card_busy() uses the PRESENT_STATE register, specifically the DAT0 signal level bit. But the ESDHC uses a non-conformant PRESENT_STATE register, thus a read fixup is required to make the driver work again. Signed-off-by: Michael Walle <michael@walle.cc> Fixes: 87a18a6a5652 ("mmc: mmc: Use ->card_busy() to detect busy cards in __mmc_switch()") Acked-by: Yangbo Lu <yangbo.lu@nxp.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Cc: <stable@vger.kernel.org> # v4.8+ Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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