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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>
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1 changed files with 7 additions and 0 deletions
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@ -1402,8 +1402,14 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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clk_unprepare(host->mck);
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switch (ios->power_mode) {
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case MMC_POWER_OFF:
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if (!IS_ERR(mmc->supply.vmmc))
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mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
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break;
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case MMC_POWER_UP:
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set_bit(ATMCI_CARD_NEED_INIT, &slot->flags);
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if (!IS_ERR(mmc->supply.vmmc))
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mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd);
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break;
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default:
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/*
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@ -2215,6 +2221,7 @@ static int __init atmci_init_slot(struct atmel_mci *host,
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}
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host->slot[id] = slot;
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mmc_regulator_get_supply(mmc);
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mmc_add_host(mmc);
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if (gpio_is_valid(slot->detect_pin)) {
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