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Diffstat (limited to 'drivers/mmc/core/core.c')
| -rw-r--r-- | drivers/mmc/core/core.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 35f3df8810e0..3fe73a7c1e99 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2109,6 +2109,26 @@ void mmc_stop_host(struct mmc_host *host) mmc_power_off(host); } +int mmc_speed_class_control(struct mmc_host *host, + unsigned int speed_class_ctrl_arg) +{ + int err = -ENOSYS; + u32 status; + + err = mmc_send_speed_class_ctrl(host, speed_class_ctrl_arg); + if (err) + return err; + + /* Issue CMD13 to check for any errors during the busy period of CMD20 */ + err = mmc_send_status(host->card, &status); + if (!err) { + if (status & R1_ERROR) + err = -EINVAL; + } + return err; +} +EXPORT_SYMBOL(mmc_speed_class_control); + int mmc_power_save_host(struct mmc_host *host) { int ret = 0; |