mmc: sdhci-of-at91: Support external regulators

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The SDHCI controller in the SAMA5D2 chip requires a valid voltage set
in the power control register, otherwise commands will fail with a
timeout error.

When using the regulator framework to specify the regulator used by the
mmc device, the voltage is not configured, and it is not possible to use
the connected device.

Implement a custom 'set_power' function for this specific hardware, that
configures the voltage in the register in all cases.

Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: stable@vger.kernel.org #4.9+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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Romain Izard 2017-03-09 16:18:20 +01:00 • committed by Ulf Hansson

parent 8bcd37d8b2

commit 2ce0c7b655

1 changed files with 19 additions and 0 deletions

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drivers/mmc/host/sdhci-of-at91.c

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