From 9215ef5ed508b5de8b0c021a87b76f74561d1bad Mon Sep 17 00:00:00 2001 From: Kishon Vijay Abraham I Date: Thu, 21 Sep 2017 16:30:13 +0200 Subject: [PATCH] dm: mmc: Add a library function to parse generic dt binding 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 Signed-off-by: Jean-Jacques Hiblot --- 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); /** -- 2.7.4