diff options
| author | Simon Trimmer <simont@opensource.cirrus.com> | 2023-08-29 19:04:33 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-08-29 22:12:38 +0300 |
| commit | 06afec5c988acb2c4f566eac2f6ec53d30d3a1b5 (patch) | |
| tree | 33bc812ee65c2f4beff4375deeb973d8c7619021 /sound | |
| parent | b5f3cec3159dd28563e5a88096769f7b77272790 (diff) | |
| download | linux-06afec5c988acb2c4f566eac2f6ec53d30d3a1b5.tar.xz | |
ASoC: cs35l56: Waiting for firmware to boot must be tolerant of I/O errors
Ignore failure to read from the cs35l56 when polling as the device will
NAK i2c accesses until it has booted and this would terminate the poll
of regmap_read_poll_timeout().
Fixes: 8a731fd37f8b ("ASoC: cs35l56: Move utility functions to shared file")
Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com
Link: https://lore.kernel.org/r/20230829160433.2647889-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/cs35l56-shared.c | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-shared.c index ae373f335ea8..98b1e63360ae 100644 --- a/sound/soc/codecs/cs35l56-shared.c +++ b/sound/soc/codecs/cs35l56-shared.c @@ -243,26 +243,27 @@ int cs35l56_wait_for_firmware_boot(struct cs35l56_base *cs35l56_base) { unsigned int reg; unsigned int val; - int ret; + int read_ret, poll_ret; if (cs35l56_base->rev < CS35L56_REVID_B0) reg = CS35L56_DSP1_HALO_STATE_A1; else reg = CS35L56_DSP1_HALO_STATE; - ret = regmap_read_poll_timeout(cs35l56_base->regmap, reg, - val, - (val < 0xFFFF) && (val >= CS35L56_HALO_STATE_BOOT_DONE), - CS35L56_HALO_STATE_POLL_US, - CS35L56_HALO_STATE_TIMEOUT_US); - - if ((ret < 0) && (ret != -ETIMEDOUT)) { - dev_err(cs35l56_base->dev, "Failed to read HALO_STATE: %d\n", ret); - return ret; - } - - if ((ret == -ETIMEDOUT) || (val != CS35L56_HALO_STATE_BOOT_DONE)) { - dev_err(cs35l56_base->dev, "Firmware boot fail: HALO_STATE=%#x\n", val); + /* + * This can't be a regmap_read_poll_timeout() because cs35l56 will NAK + * I2C until it has booted which would terminate the poll + */ + poll_ret = read_poll_timeout(regmap_read, read_ret, + (val < 0xFFFF) && (val >= CS35L56_HALO_STATE_BOOT_DONE), + CS35L56_HALO_STATE_POLL_US, + CS35L56_HALO_STATE_TIMEOUT_US, + false, + cs35l56_base->regmap, reg, &val); + + if (poll_ret) { + dev_err(cs35l56_base->dev, "Firmware boot timed out(%d): HALO_STATE=%#x\n", + read_ret, val); return -EIO; } |