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| author | Kishon Vijay Abraham I <kishon@ti.com> | 2017-09-21 16:30:03 +0200 |
|---|---|---|
| committer | Jaehoon Chung <jh80.chung@samsung.com> | 2018-01-12 18:11:04 +0900 |
| commit | 35f6782055c99410fbeae33ab28ea68de154360c (patch) | |
| tree | a9687137937bbd349e0d72e6e73de756e809d0c7 /include/mmc.h | |
| parent | fb7c3beb5178e5c81a00642e71a4b73427b52429 (diff) | |
| download | u-boot-35f6782055c99410fbeae33ab28ea68de154360c.zip u-boot-35f6782055c99410fbeae33ab28ea68de154360c.tar.gz u-boot-35f6782055c99410fbeae33ab28ea68de154360c.tar.bz2 | |
mmc: add a new mmc parameter to disable mmc clock
mmc clock has to be disabled in certain cases like during
the voltage switch sequence. Modify mmc_set_clock function
to take disable as an argument that signifies if the
clock has to be enabled or disabled.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Diffstat (limited to 'include/mmc.h')
| -rw-r--r-- | include/mmc.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/include/mmc.h b/include/mmc.h index bd096ae..8d6e0f8 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -472,6 +472,7 @@ struct mmc { void *priv; uint has_init; int high_capacity; + bool clk_disable; /* true if the clock can be turned off */ uint bus_width; uint clock; enum mmc_voltage signal_voltage; @@ -567,7 +568,16 @@ int mmc_unbind(struct udevice *dev); int mmc_initialize(bd_t *bis); int mmc_init(struct mmc *mmc); int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size); -int mmc_set_clock(struct mmc *mmc, uint clock); + +/** + * mmc_set_clock() - change the bus clock + * @mmc: MMC struct + * @clock: bus frequency in Hz + * @disable: flag indicating if the clock must on or off + * @return 0 if OK, -ve on error + */ +int mmc_set_clock(struct mmc *mmc, uint clock, bool disable); + struct mmc *find_mmc_device(int dev_num); int mmc_set_dev(int dev_num); void print_mmc_devices(char separator); |