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
drivers/mmc/host/atmel-mci.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 69e438e..4ea5333 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -23,6 +23,7 @@
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
#include <linux/scatterlist.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
@@ -2198,6 +2199,14 @@ static int __init atmci_init_slot(struct atmel_mci *host,
host->slot[id] = slot;
mmc_add_host(mmc);
+ mmc_regulator_get_supply(mmc);
+ if (!IS_ERR(mmc->supply.vmmc)) {
+ int ret = regulator_enable(mmc->supply.vmmc);
+ if (ret)
+ dev_err(&mmc->class_dev,
+ "failed to enable regulator: %d\n", ret);
+ }
+
if (gpio_is_valid(slot->detect_pin)) {
int ret;
--
1.8.1.2
--
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