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| author | Sanyog Kale <sanyog.r.kale@intel.com> | 2017-12-14 08:49:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-19 13:27:33 +0300 |
| commit | d52d7a1be02cc6da287bfaea7eebb0de1a77fbe2 (patch) | |
| tree | a0a540a601e261253f8b90b1a5518c4623fc6abd /drivers/soundwire/bus.h | |
| parent | 9d715fa005ebccc510a430df278665793528e31f (diff) | |
| download | linux-d52d7a1be02cc6da287bfaea7eebb0de1a77fbe2.tar.xz | |
soundwire: Add Slave status handling helpers
SoundWire Slaves report status to bus. Add helpers to handle
the status changes.
Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com>
Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Acked-By: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/soundwire/bus.h')
| -rw-r--r-- | drivers/soundwire/bus.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/soundwire/bus.h b/drivers/soundwire/bus.h index 48eb7de8db7b..e8df55d761c7 100644 --- a/drivers/soundwire/bus.h +++ b/drivers/soundwire/bus.h @@ -52,4 +52,18 @@ int sdw_transfer_defer(struct sdw_bus *bus, struct sdw_msg *msg, int sdw_fill_msg(struct sdw_msg *msg, struct sdw_slave *slave, u32 addr, size_t count, u16 dev_num, u8 flags, u8 *buf); +/* Read-Modify-Write Slave register */ +static inline int +sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val) +{ + int tmp; + + tmp = sdw_read(slave, addr); + if (tmp < 0) + return tmp; + + tmp = (tmp & ~mask) | val; + return sdw_write(slave, addr, tmp); +} + #endif /* __SDW_BUS_H */ |