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mmc: uniphier-sd: Add vqmmc regulator support

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Add initial support for setting the vqmmc regulator. Since we do not
support 1V8 modes, set the regulator to 3V3 and enable it.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Marek Vasut 2017-09-15 21:10:54 +02:00 • committed by Jaehoon Chung
parent d6c40031d5
commit 9f13021f81
1 changed files with 13 additions and 0 deletions
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13
drivers/mmc/uniphier-sd.c
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@ -14,6 +14,7 @@
#include <linux/dma-direction.h>
#include <linux/io.h>
#include <linux/sizes.h>
#include <power/regulator.h>
#include <asm/unaligned.h>
DECLARE_GLOBAL_DATA_PTR;
@ -756,6 +757,9 @@ static int uniphier_sd_probe(struct udevice *dev)
fdt_addr_t base;
struct clk clk;
int ret;
#ifdef CONFIG_DM_REGULATOR
struct udevice *vqmmc_dev;
#endif
base = devfdt_get_addr(dev);
if (base == FDT_ADDR_T_NONE)
@ -765,6 +769,15 @@ static int uniphier_sd_probe(struct udevice *dev)
if (!priv->regbase)
return -ENOMEM;
#ifdef CONFIG_DM_REGULATOR
ret = device_get_supply_regulator(dev, "vqmmc-supply", &vqmmc_dev);
if (!ret) {
/* Set the regulator to 3.3V until we support 1.8V modes */
regulator_set_value(vqmmc_dev, 3300000);
regulator_set_enable(vqmmc_dev, true);
}
#endif
ret = clk_get_by_index(dev, 0, &clk);
if (ret < 0) {
dev_err(dev, "failed to get host clock\n");