diff options
| author | Thierry Reding <thierry.reding@avionic-design.de> | 2012-01-02 01:15:36 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2012-01-08 21:28:27 -0600 |
| commit | 314284b1567f1ce29c19060641e7f213146f7ab8 (patch) | |
| tree | 116155fe43126dbd7a94cff179e16b084c9f1e04 /include | |
| parent | bfe6f6235fdfa130ad8c5a8898ef4d3a37bcad8c (diff) | |
mmc: Change board_mmc_getcd() function prototype.
The new API no longer uses the extra cd parameter that was used to store
the card presence state. Instead, this information is returned via the
function's return value. board_mmc_getcd() returns -1 to indicate that
no card-detection mechanism is implemented; 0 indicates that no card is
present and 1 is returned if it was detected that a card is present.
The rationale for this change can be found in the following email
thread:
http://lists.denx.de/pipermail/u-boot/2011-November/110180.html
In summary, the old API was not consistent with the rest of the MMC API
which always passes a struct mmc as the first parameter. Furthermore the
cd parameter was used to mean "card absence" in some implementations and
"card presence" in others.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Jason Liu <jason.hui@linaro.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/mmc.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/mmc.h b/include/mmc.h index 015a7f36ae9..a850174ab86 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -314,7 +314,7 @@ struct mmc *find_mmc_device(int dev_num); int mmc_set_dev(int dev_num); void print_mmc_devices(char separator); int get_mmc_num(void); -int board_mmc_getcd(u8 *cd, struct mmc *mmc); +int board_mmc_getcd(struct mmc *mmc); int mmc_switch_part(int dev_num, unsigned int part_num); #ifdef CONFIG_GENERIC_MMC |