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dm: mmc: Add a library function to parse generic dt binding

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Add a new function to parse host controller dt node and
set mmc_config. This function can be used by mmc controller
drivers to set the generic mmc_config.
This function can be extended to set other UHS mode caps
once UHS mode support is added.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
This commit is contained in:
Kishon Vijay Abraham I 2017-09-21 16:30:13 +02:00 committed by Jaehoon Chung
parent 9815e3ba80
commit 9215ef5ed5
2 changed files with 47 additions and 0 deletions
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46
drivers/mmc/mmc-uclass.c
View file

@ -120,6 +120,52 @@ int mmc_execute_tuning(struct mmc *mmc, uint opcode)
return dm_mmc_execute_tuning(mmc->dev, opcode);
}
int mmc_of_parse(const void *fdt, int node, struct mmc_config *cfg)
{
int val;
val = fdtdec_get_int(fdt, node, "bus-width", 1);
switch (val) {
case 0x8:
cfg->host_caps |= MMC_MODE_8BIT;
/* fall through */
case 0x4:
cfg->host_caps |= MMC_MODE_4BIT;
/* fall through */
case 0x1:
cfg->host_caps |= MMC_MODE_1BIT;
break;
default:
printf("error: %s invalid bus-width property %d\n",
fdt_get_name(fdt, node, NULL), val);
return -ENOENT;
}
cfg->f_max = fdtdec_get_int(fdt, node, "max-frequency", 52000000);
if (fdtdec_get_bool(fdt, node, "cap-sd-highspeed"))
cfg->host_caps |= MMC_CAP(SD_HS);
if (fdtdec_get_bool(fdt, node, "cap-mmc-highspeed"))
cfg->host_caps |= MMC_CAP(MMC_HS);
if (fdtdec_get_bool(fdt, node, "sd-uhs-sdr12"))
cfg->host_caps |= MMC_CAP(UHS_SDR12);
if (fdtdec_get_bool(fdt, node, "sd-uhs-sdr25"))
cfg->host_caps |= MMC_CAP(UHS_SDR25);
if (fdtdec_get_bool(fdt, node, "sd-uhs-sdr50"))
cfg->host_caps |= MMC_CAP(UHS_SDR50);
if (fdtdec_get_bool(fdt, node, "sd-uhs-sdr104"))
cfg->host_caps |= MMC_CAP(UHS_SDR104);
if (fdtdec_get_bool(fdt, node, "sd-uhs-ddr50"))
cfg->host_caps |= MMC_CAP(UHS_DDR50);
if (fdtdec_get_bool(fdt, node, "mmc-ddr-1_8v"))
cfg->host_caps |= MMC_CAP(MMC_DDR_52);
if (fdtdec_get_bool(fdt, node, "mmc-hs200-1_8v"))
cfg->host_caps |= MMC_CAP(MMC_HS_200);
return 0;
}
struct mmc *mmc_get_mmc_dev(struct udevice *dev)
{
struct mmc_uclass_priv *upriv;

1
include/mmc.h
View file

@ -651,6 +651,7 @@ int mmc_unbind(struct udevice *dev);
int mmc_initialize(bd_t *bis);
int mmc_init(struct mmc *mmc);
int mmc_send_tuning(struct mmc *mmc, u32 opcode, int *cmd_error);
int mmc_of_parse(const void *fdt, int node, struct mmc_config *cfg);
int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size);
/**