[PATCH 0/4] mmc: sdhci-esdhc-imx: add 1-bit bus width support

[ziniu . wang_1]

From: Luke Wang <ziniu.wang_1@xxxxxxx>

This series adds 1-bit bus width support for sdhci-esdhc-imx driver.

Currently sdhci-esdhc-imx doesn't support 1-bit width because it
doesn't call sdhci_get_property() to parse "bus-width = <1>" and
set SDHCI_QUIRK_FORCE_1_BIT_DATA quirk.

After adding sdhci_get_property(), another issue is exposed:
mmc_select_hs200() returns 0 without switching when 1-bit bus is
used, causing mmc_select_timing() to skip mmc_select_hs(). This
leaves eMMC in legacy mode (26MHz) instead of High Speed (52MHz).

Fix by dropping incompatible UHS/DDR/HS200/HS400 caps in
mmc_validate_host_caps() for 1-bit width, and clean up duplicate
code now handled by common framework.

Luke Wang (4):
  mmc: core: fix timing selection for 1-bit bus width
  mmc: sdhci-esdhc-imx: add 1-bit bus width support
  mmc: sdhci-esdhc-imx: remove duplicate HS400 bus width validation
  mmc: sdhci-pltfm: remove duplicate DTS property parsing

 drivers/mmc/core/host.c            | 19 ++++++++++++++-----
 drivers/mmc/host/sdhci-esdhc-imx.c |  6 +-----
 drivers/mmc/host/sdhci-pltfm.c     |  7 -------
 3 files changed, 15 insertions(+), 17 deletions(-)

-- 
2.34.1