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mmc: atmel-mci: add vmmc-supply support 

Other MMC hosts handle a regulator named vmmc-supply that allows to power
the MMC card or SDIO device before communicating on the bus.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Chris Ball <chris@printf.net>
hifive-unleashed-5.1
Alexandre Belloni 2013-10-17 12:46:48 +02:00 committed by Chris Ball
parent 390145f9ad
commit 9e7861f500
1 changed files with 7 additions and 0 deletions
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7
drivers/mmc/host/atmel-mci.c
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@ -1402,8 +1402,14 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
clk_unprepare(host->mck);
switch (ios->power_mode) {
case MMC_POWER_OFF:
if (!IS_ERR(mmc->supply.vmmc))
mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
break;
case MMC_POWER_UP:
set_bit(ATMCI_CARD_NEED_INIT, &slot->flags);
if (!IS_ERR(mmc->supply.vmmc))
mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd);
break;
default:
/*
@ -2215,6 +2221,7 @@ static int __init atmci_init_slot(struct atmel_mci *host,
}
host->slot[id] = slot;
mmc_regulator_get_supply(mmc);
mmc_add_host(mmc);
if (gpio_is_valid(slot->detect_pin)) {