[PATCH v2 0/4] Extend sdhci-esdhc-imx card_detect and write_protect support for mx5

Shawn Guo shawn.guo at linaro.org
Wed Jun 15 07:15:18 EDT 2011

The card-present polling for sdhci based driver is very expensive
in terms of the impact to system performance.  We observe a few
system performance issues from Freescale and Linaro on mx5 platforms,
which have been proved card polling related.

The patch set extends the current sdhci-esdhc-imx card_detect and
write_protect support to cover mx5 platforms, and solves above
performance issues.

Changes since v1:
 * Rebase on today's linux-next
 * Take the suggestion from Arnaud Patard to add default pdata in
   imx_add_sdhci_esdhc_imx(), to avoid touching every single board
   file for the platform_data changes
 * Add comment for sdhci.c change
   descriptive name
 * Add missing NONE case handling in esdhc_pltfm_get_ro
 * Improve a couple comment wording per suggestion from Wolfram Sang

Shawn Guo (4):
      mmc: sdhci: fix interrupt storm from card detection
      mmc: sdhci-esdhc-imx: SDHCI_CARD_PRESENT does not get cleared
      mmc: sdhci-esdhc-imx: remove "WP" from flag ESDHC_FLAG_GPIO_FOR_CD_WP
      mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

 arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c     |    3 +-
 arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c     |    3 +-
 arch/arm/mach-imx/mach-mx25_3ds.c                  |    2 +
 arch/arm/mach-imx/mach-pcm043.c                    |    2 +
 arch/arm/mach-mx5/board-mx51_babbage.c             |   14 ++-
 arch/arm/mach-mx5/board-mx53_loco.c                |    4 +
 .../plat-mxc/devices/platform-sdhci-esdhc-imx.c    |   12 ++
 arch/arm/plat-mxc/include/mach/esdhc.h             |   25 ++++-
 drivers/mmc/host/sdhci-esdhc-imx.c                 |  123 ++++++++++++--------
 drivers/mmc/host/sdhci.c                           |   23 +++-
 10 files changed, 145 insertions(+), 66 deletions(-)

More information about the linux-arm-kernel mailing list