diff options
| author | Oded Gabbay <ogabbay@advaoptical.com> | 2013-06-27 12:00:05 -0400 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2013-07-05 12:46:30 -0400 |
| commit | 66b50a00992dca97b442e016a9b2dba892e2df61 (patch) | |
| tree | 764fbe455ac9fffafd04f0778d673601ca786d16 /drivers/mmc/host/sdhci-esdhc.h | |
| parent | 7c4f10ac5a940b3994be7f1801a606f8605e7a69 (diff) | |
| download | op-kernel-dev-66b50a00992dca97b442e016a9b2dba892e2df61.zip op-kernel-dev-66b50a00992dca97b442e016a9b2dba892e2df61.tar.gz | |
mmc: esdhc: Add support for 8-bit bus width and non-removable card
This patch adds support of connecting an MMC media using an 8-bit
bus width connection to Freescale's P2020 H/W SDHC controller. During
the probe function, the generic function mmc_of_parse is called to
detect whether the controller is configured with 8-bit bus width.
Also, the generic function detects if the non-removable property is
set in the device tree. The function esdhc_pltfm_bus_width was added
because the bus width configuration is platform specific.
Signed-off-by: Oded Gabbay <ogabbay@advaoptical.com>
Reviewed-by: Anton Vorontsov <anton@enomsg.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-esdhc.h')
| -rw-r--r-- | drivers/mmc/host/sdhci-esdhc.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h index 6f16406..a2a0642 100644 --- a/drivers/mmc/host/sdhci-esdhc.h +++ b/drivers/mmc/host/sdhci-esdhc.h @@ -36,6 +36,13 @@ /* pltfm-specific */ #define ESDHC_HOST_CONTROL_LE 0x20 +/* + * P2020 interpretation of the SDHCI_HOST_CONTROL register + */ +#define ESDHC_CTRL_4BITBUS (0x1 << 1) +#define ESDHC_CTRL_8BITBUS (0x2 << 1) +#define ESDHC_CTRL_BUSWIDTH_MASK (0x3 << 1) + /* OF-specific */ #define ESDHC_DMA_SYSCTL 0x40c #define ESDHC_DMA_SNOOP 0x00000040 |
