This series of patches implements central card-detection within the MMC framework. Before this patch series, many boards actually did implement the board_mmc_getcd() function, but it wasn't used except by one driver (fsl_esdhc). Unfortunately, implementations interpreted the meaning of the cd parameter differently, some taking it to signal card absence and others using it to detect card presence. Furthermore, the signature of the board_mmc_getcd() function was not at all consistent with other MMC related functions.
The first patch in this series therefore changes the board_mmc_getcd() function signature and consolidates all current implementations. The second patch adds a central card-detection implementation within the MMC framework by using the new board_mmc_getcd() function and adds a hook that can be provided by drivers to serve as a default card-detect mechanism if no board-specific implementation is provided. The third and fourth patches implement this driver hook for the fsl_esdhc and the tegra2 MMC drivers.
For reference, the following email thread contains the discussion that led to this patch series:
http://lists.denx.de/pipermail/u-boot/2011-November/110180.html
Changes in v2: - add a better rationale for the series and a reference to the email thread that started it - add an explanation to patch 3 why the call to board_mmc_getcd() is removed from the fsl_esdhc driver - add a cover letter which explains the series' goal
Thierry Reding (4): mmc: Change board_mmc_getcd() signature. mmc: Implement card detection. mmc: fsl_esdhc: Implement card-detect hook. mmc: tegra2: Implement card-detect hook.
board/efikamx/efikamx.c | 8 +++----- board/emk/top9000/top9000.c | 12 ++---------- board/freescale/mx51evk/mx51evk.c | 8 +++----- board/freescale/mx53ard/mx53ard.c | 8 +++----- board/freescale/mx53evk/mx53evk.c | 8 +++----- board/freescale/mx53loco/mx53loco.c | 8 +++----- board/freescale/mx53smd/mx53smd.c | 6 ++---- doc/README.atmel_mci | 12 ++---------- drivers/mmc/arm_pl180_mmci.c | 1 + drivers/mmc/bfin_sdh.c | 1 + drivers/mmc/davinci_mmc.c | 1 + drivers/mmc/fsl_esdhc.c | 27 ++++++++++++--------------- drivers/mmc/ftsdc010_esdhc.c | 1 + drivers/mmc/gen_atmel_mci.c | 1 + drivers/mmc/mmc.c | 22 ++++++++++++++++++++-- drivers/mmc/mmc_spi.c | 1 + drivers/mmc/mxcmmc.c | 1 + drivers/mmc/mxsmmc.c | 1 + drivers/mmc/omap_hsmmc.c | 1 + drivers/mmc/pxa_mmc_gen.c | 1 + drivers/mmc/s5p_mmc.c | 1 + drivers/mmc/sdhci.c | 1 + drivers/mmc/sh_mmcif.c | 1 + drivers/mmc/tegra2_mmc.c | 28 +++++++++++++--------------- include/mmc.h | 4 +++- 25 files changed, 82 insertions(+), 82 deletions(-)