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| author | Kishon Vijay Abraham I <kishon@ti.com> | 2018-04-27 17:17:14 +0530 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2018-05-03 09:36:19 +0200 |
| commit | c16bc9a7678a27ece028dcbfea8df2049a65dbec (patch) | |
| tree | a10e422764f1fce70cca5902848bba6cf8695e57 /include/linux/mmc | |
| parent | 1d3a2220c2a1ab864caf4a64dee745d287089238 (diff) | |
| download | lwn-c16bc9a7678a27ece028dcbfea8df2049a65dbec.tar.gz lwn-c16bc9a7678a27ece028dcbfea8df2049a65dbec.zip | |
mmc: sdhci: Disable 1.8v modes (HS200/HS400/UHS) if controller can't support 1.8v
The SDHCI controller in a SoC might support HS200/HS400 (indicated
using mmc-hs200-1_8v/mmc-hs400-1_8v dt property), but if the board is
modeled such that the IO lines are not connected to 1.8v then
HS200/HS400 cannot be supported. Disable HS200/HS400 if the board
does not have 1.8v connected to the IO lines. Also Disable DDR/UHS in 1.8v
if the IO lines are not connected to 1.8v.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'include/linux/mmc')
| -rw-r--r-- | include/linux/mmc/host.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 85146235231e..4e80c199c9c2 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -320,6 +320,9 @@ struct mmc_host { #define MMC_CAP_UHS_SDR50 (1 << 18) /* Host supports UHS SDR50 mode */ #define MMC_CAP_UHS_SDR104 (1 << 19) /* Host supports UHS SDR104 mode */ #define MMC_CAP_UHS_DDR50 (1 << 20) /* Host supports UHS DDR50 mode */ +#define MMC_CAP_UHS (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | \ + MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | \ + MMC_CAP_UHS_DDR50) /* (1 << 21) is free for reuse */ #define MMC_CAP_DRIVER_TYPE_A (1 << 23) /* Host supports Driver Type A */ #define MMC_CAP_DRIVER_TYPE_C (1 << 24) /* Host supports Driver Type C */ @@ -345,6 +348,7 @@ struct mmc_host { #define MMC_CAP2_HS400_1_2V (1 << 16) /* Can support HS400 1.2V */ #define MMC_CAP2_HS400 (MMC_CAP2_HS400_1_8V | \ MMC_CAP2_HS400_1_2V) +#define MMC_CAP2_HSX00_1_8V (MMC_CAP2_HS200_1_8V_SDR | MMC_CAP2_HS400_1_8V) #define MMC_CAP2_HSX00_1_2V (MMC_CAP2_HS200_1_2V_SDR | MMC_CAP2_HS400_1_2V) #define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17) #define MMC_CAP2_NO_WRITE_PROTECT (1 << 18) /* No physical write protect pin, assume that card is always read-write */ |