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mmc: sdhci-iproc: add bcm2835 support 

Scott Branden from Broadcom said that the BCM2835 eMMC IP core is
very similar to IPROC and share most of the quirks. So use this driver
instead of separate one.

The sdhci-iproc contains a better workaround for the clock domain
crossing problem which doesn't need any delays. This results in a
better write performance.

Btw we get the rid of the SDHCI_CAPABILITIES hack in the sdhci_readl
function.

Suggested-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Eric Anholt <eric@anholt.net>
Acked-by: Scott Branden <sbranden@broadcom.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Stefan Wahren 2016-01-27 22:25:41 +00:00 committed by Ulf Hansson
parent b17b4ab8ce
commit 77cb7d3a4d
2 changed files with 18 additions and 3 deletions
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6
drivers/mmc/host/Kconfig
View File

@ -318,15 +318,15 @@ config MMC_SDHCI_F_SDH30
If unsure, say N.
config MMC_SDHCI_IPROC
tristate "SDHCI platform support for the iProc SD/MMC Controller"
depends on ARCH_BCM_IPROC || COMPILE_TEST
tristate "SDHCI support for the BCM2835 & iProc SD/MMC Controller"
depends on ARCH_BCM2835 || ARCH_BCM_IPROC || COMPILE_TEST
depends on MMC_SDHCI_PLTFM
default ARCH_BCM_IPROC
select MMC_SDHCI_IO_ACCESSORS
help
This selects the iProc SD/MMC controller.
If you have an IPROC platform with SD or MMC devices,
If you have a BCM2835 or IPROC platform with SD or MMC devices,
say Y or M here.
If unsure, say N.

15
drivers/mmc/host/sdhci-iproc.c
View File

@ -169,7 +169,22 @@ static const struct sdhci_iproc_data iproc_data = {
.mmc_caps = MMC_CAP_1_8V_DDR,
};
static const struct sdhci_pltfm_data sdhci_bcm2835_pltfm_data = {
.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
SDHCI_QUIRK_MISSING_CAPS,
.ops = &sdhci_iproc_ops,
};
static const struct sdhci_iproc_data bcm2835_data = {
.pdata = &sdhci_bcm2835_pltfm_data,
.caps = SDHCI_CAN_VDD_330,
.caps1 = 0x00000000,
.mmc_caps = 0x00000000,
};
static const struct of_device_id sdhci_iproc_of_match[] = {
{ .compatible = "brcm,bcm2835-sdhci", .data = &bcm2835_data },
{ .compatible = "brcm,sdhci-iproc-cygnus", .data = &iproc_data },
{ }
};