[U-Boot] [PATCH v2 26/26] dm: mmc: Add a library function to parse generic dt binding
Jean-Jacques Hiblot
jjhiblot at ti.com
Thu Sep 21 14:30:13 UTC 2017
From: Kishon Vijay Abraham I <kishon at ti.com>
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 at ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot at ti.com>
---
drivers/mmc/mmc-uclass.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
include/mmc.h | 1 +
2 files changed, 47 insertions(+)
diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
index 7856e0a..e30cde7 100644
--- a/drivers/mmc/mmc-uclass.c
+++ b/drivers/mmc/mmc-uclass.c
@@ -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;
diff --git a/include/mmc.h b/include/mmc.h
index 79be6b4..6230a32 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -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);
/**
--
1.9.1
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