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@xxxxxxxxxxxxxxxxxx>
---
Changes in v2:
- use mmc_regulator_get_supply instead of devm_regulator_get
Changes in v3:
- en/disable the regulator in .set_ios using mmc_regulator_set_ocr
drivers/mmc/host/atmel-mci.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 69e438e..a9e1ba6 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -1385,8 +1385,14 @@ 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:
/*
@@ -2196,6 +2202,7 @@ 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)) {
--
1.8.1.2
--
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