diff options
| author | Richard Fitzgerald <rf@opensource.cirrus.com> | 2024-08-05 15:08:39 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-08-05 18:26:29 +0100 |
| commit | e42066df07c0fcedebb32ed56f8bc39b4bf86337 (patch) | |
| tree | 0849bf328a69b36aa2f2d7c209ae89ad27a49ac2 /include | |
| parent | 9a1af1e218779724ff29ca75f2b9397dc3ed11e7 (diff) | |
ASoC: cs35l56: Handle OTP read latency over SoundWire
Use the late-read buffer in the CS35L56 SoundWire interface to
read OTP memory.
The OTP memory has a longer access latency than chip registers
and cannot guarantee to return the data value in the SoundWire
control response if the bus clock is >4.8 MHz. The Cirrus
SoundWire peripheral IP exposes the bridge-to-bus read buffer
and status bits. For a read from OTP the bridge status bits are
polled to wait for the OTP data to be loaded into the read buffer
and the data is then read from there.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Fixes: e1830f66f6c6 ("ASoC: cs35l56: Add helper functions for amp calibration")
Link: https://patch.msgid.link/20240805140839.26042-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sound/cs35l56.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/sound/cs35l56.h b/include/sound/cs35l56.h index a6aa112e5741..a51acefa785f 100644 --- a/include/sound/cs35l56.h +++ b/include/sound/cs35l56.h @@ -277,6 +277,11 @@ static inline int cs35l56_force_sync_asp1_registers_from_cache(struct cs35l56_ba return 0; } +static inline bool cs35l56_is_otp_register(unsigned int reg) +{ + return (reg >> 16) == 3; +} + extern struct regmap_config cs35l56_regmap_i2c; extern struct regmap_config cs35l56_regmap_spi; extern struct regmap_config cs35l56_regmap_sdw; |