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| author | Stefan Binding <sbinding@opensource.cirrus.com> | 2022-05-25 16:16:30 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-06-06 14:34:34 +0300 |
| commit | 94e0bc317ad241c022a6bb311b3a28b4d51ea8b6 (patch) | |
| tree | 40b72196dd4af2fca41878d4ebae2a9c300d8317 /sound/soc/codecs/cs35l41-lib.c | |
| parent | be1a63daffdd152ba4c7b71ab9fec2e39259b42b (diff) | |
| download | linux-94e0bc317ad241c022a6bb311b3a28b4d51ea8b6.tar.xz | |
ASoC: cs35l41: Move cs35l41 exit hibernate function into shared code
CS35L41 HDA Driver will support hibernation using DSP firmware,
move the exit hibernate function into shared code so this can
be reused.
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Signed-off-by: Vitaly Rodionov <vitalyr@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220525131638.5512-10-vitalyr@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/cs35l41-lib.c')
| -rw-r--r-- | sound/soc/codecs/cs35l41-lib.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/sound/soc/codecs/cs35l41-lib.c b/sound/soc/codecs/cs35l41-lib.c index 6d3070ea9e06..cc5366c8bdd6 100644 --- a/sound/soc/codecs/cs35l41-lib.c +++ b/sound/soc/codecs/cs35l41-lib.c @@ -1321,6 +1321,66 @@ int cs35l41_write_fs_errata(struct device *dev, struct regmap *regmap) } EXPORT_SYMBOL_GPL(cs35l41_write_fs_errata); +static void cs35l41_wait_for_pwrmgt_sts(struct device *dev, struct regmap *regmap) +{ + const int pwrmgt_retries = 10; + unsigned int sts; + int i, ret; + + for (i = 0; i < pwrmgt_retries; i++) { + ret = regmap_read(regmap, CS35L41_PWRMGT_STS, &sts); + if (ret) + dev_err(dev, "Failed to read PWRMGT_STS: %d\n", ret); + else if (!(sts & CS35L41_WR_PEND_STS_MASK)) + return; + + udelay(20); + } + + dev_err(dev, "Timed out reading PWRMGT_STS\n"); +} + +int cs35l41_exit_hibernate(struct device *dev, struct regmap *regmap) +{ + const int wake_retries = 20; + const int sleep_retries = 5; + int ret, i, j; + + for (i = 0; i < sleep_retries; i++) { + dev_dbg(dev, "Exit hibernate\n"); + + for (j = 0; j < wake_retries; j++) { + ret = cs35l41_set_cspl_mbox_cmd(dev, regmap, + CSPL_MBOX_CMD_OUT_OF_HIBERNATE); + if (!ret) + break; + + usleep_range(100, 200); + } + + if (j < wake_retries) { + dev_dbg(dev, "Wake success at cycle: %d\n", j); + return 0; + } + + dev_err(dev, "Wake failed, re-enter hibernate: %d\n", ret); + + cs35l41_wait_for_pwrmgt_sts(dev, regmap); + regmap_write(regmap, CS35L41_WAKESRC_CTL, 0x0088); + + cs35l41_wait_for_pwrmgt_sts(dev, regmap); + regmap_write(regmap, CS35L41_WAKESRC_CTL, 0x0188); + + cs35l41_wait_for_pwrmgt_sts(dev, regmap); + regmap_write(regmap, CS35L41_PWRMGT_CTL, 0x3); + } + + dev_err(dev, "Timed out waking device\n"); + + return -ETIMEDOUT; +} +EXPORT_SYMBOL_GPL(cs35l41_exit_hibernate); + MODULE_DESCRIPTION("CS35L41 library"); MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>"); MODULE_AUTHOR("Lucas Tanure, Cirrus Logic Inc, <tanureal@opensource.cirrus.com>"); |