diff options
author | Mark Brown <broonie@sirena.org.uk> | 2013-06-14 17:42:49 +0100 |
---|---|---|
committer | Mark Brown <broonie@sirena.org.uk> | 2013-06-14 17:42:49 +0100 |
commit | c4d0a06860b8ade51836f07ae050245f9059c6d6 (patch) | |
tree | 88931d8ccb3cc94bb2a895149ff18dfc448e3324 /drivers/mmc/core/sdio_io.c | |
parent | ebb7c3b1a10a2cd3986f2db60612d2c6fbb915ab (diff) | |
parent | 1f76bce8544acd38f7bb1e822540f8ca521e1b7f (diff) |
Merge remote-tracking branch 'jstultz-android/linaro-fixes/experimental/android-3.9' into merge-androidlsk-android-2013.06
Conflicts:
arch/arm/common/Makefile
arch/arm/include/asm/irq.h
arch/arm/include/asm/smp.h
arch/arm/kernel/smp.c
Diffstat (limited to 'drivers/mmc/core/sdio_io.c')
-rwxr-xr-x[-rw-r--r--] | drivers/mmc/core/sdio_io.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c index 78cb4d5d9d5..8fdeb07723a 100644..100755 --- a/drivers/mmc/core/sdio_io.c +++ b/drivers/mmc/core/sdio_io.c @@ -384,6 +384,39 @@ u8 sdio_readb(struct sdio_func *func, unsigned int addr, int *err_ret) EXPORT_SYMBOL_GPL(sdio_readb); /** + * sdio_readb_ext - read a single byte from a SDIO function + * @func: SDIO function to access + * @addr: address to read + * @err_ret: optional status value from transfer + * @in: value to add to argument + * + * Reads a single byte from the address space of a given SDIO + * function. If there is a problem reading the address, 0xff + * is returned and @err_ret will contain the error code. + */ +unsigned char sdio_readb_ext(struct sdio_func *func, unsigned int addr, + int *err_ret, unsigned in) +{ + int ret; + unsigned char val; + + BUG_ON(!func); + + if (err_ret) + *err_ret = 0; + + ret = mmc_io_rw_direct(func->card, 0, func->num, addr, (u8)in, &val); + if (ret) { + if (err_ret) + *err_ret = ret; + return 0xFF; + } + + return val; +} +EXPORT_SYMBOL_GPL(sdio_readb_ext); + +/** * sdio_writeb - write a single byte to a SDIO function * @func: SDIO function to access * @b: byte to write |