diff options
| author | Peng Fan <peng.fan@nxp.com> | 2017-06-12 17:50:54 +0800 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2017-07-12 09:44:22 +0200 |
| commit | 4483b7eb8874cb78a1ebddfcd599bec00c87ab71 (patch) | |
| tree | 1552b4c3583aca6aa15d5fd9e4ae95e8ae08184e /drivers/mmc/fsl_esdhc.c | |
| parent | 32a9179f3adf6b36d85601ff6eba251dc6d207f9 (diff) | |
dm: mmc: fsl_esdhc: handle vqmmc supply
Handle vqmmc supply. Some boards have a fixed I/O voltage
at 1.8V for emmc, so the usdhc also needs to be configured
as 1.8V by setting VSELECT bit. The vs18_enable is the one
that used to checking whether setting VSELECT or not in
the driver. So if vqmmc supply is 1.8V, set vs18_enable,
the driver will set VSELECT.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: York Sun <york.sun@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Diffstat (limited to 'drivers/mmc/fsl_esdhc.c')
| -rw-r--r-- | drivers/mmc/fsl_esdhc.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index 74a0017842..50ed80a4d8 100644 --- a/drivers/mmc/fsl_esdhc.c +++ b/drivers/mmc/fsl_esdhc.c @@ -16,6 +16,7 @@ #include <hwconfig.h> #include <mmc.h> #include <part.h> +#include <power/regulator.h> #include <malloc.h> #include <fsl_esdhc.h> #include <fdt_support.h> @@ -971,6 +972,7 @@ static int fsl_esdhc_probe(struct udevice *dev) struct fsl_esdhc_priv *priv = dev_get_priv(dev); const void *fdt = gd->fdt_blob; int node = dev_of_offset(dev); + struct udevice *vqmmc_dev; fdt_addr_t addr; unsigned int val; int ret; @@ -1008,6 +1010,29 @@ static int fsl_esdhc_probe(struct udevice *dev) if (ret) priv->wp_enable = 0; #endif + + priv->vs18_enable = 0; + +#ifdef CONFIG_DM_REGULATOR + /* + * If emmc I/O has a fixed voltage at 1.8V, this must be provided, + * otherwise, emmc will work abnormally. + */ + ret = device_get_supply_regulator(dev, "vqmmc-supply", &vqmmc_dev); + if (ret) { + dev_dbg(dev, "no vqmmc-supply\n"); + } else { + ret = regulator_set_enable(vqmmc_dev, true); + if (ret) { + dev_err(dev, "fail to enable vqmmc-supply\n"); + return ret; + } + + if (regulator_get_value(vqmmc_dev) == 1800000) + priv->vs18_enable = 1; + } +#endif + /* * TODO: * Because lack of clk driver, if SDHC clk is not enabled, |