diff options
| author | Rickard x Andersson <rickaran@axis.com> | 2022-04-29 09:22:10 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-05-03 13:47:43 +0100 |
| commit | 2364a64d0673f5044e6a52cb17d6d60c6f1f8329 (patch) | |
| tree | fcf53adad29c544399eb407a9d0584a76a89797e /drivers/regulator/pca9450-regulator.c | |
| parent | bd2f5e71454bc84427c4fd67c5ea4881f155ac6e (diff) | |
| download | linux-2364a64d0673f5044e6a52cb17d6d60c6f1f8329.tar.gz | |
regulator: pca9450: Make warm reset on WDOG_B assertion
The default configuration of the PMIC behavior makes the PMIC power cycle most regulators on WDOG_B assertion. This power cycling causes the memory contents of OCRAM to be lost. Some systems neeeds some memory that survives reset and reboot, therefore this patch is created. Signed-off-by: Rickard x Andersson <rickaran@axis.com> Link: https://lore.kernel.org/r/20220429072211.24957-4-rickaran@axis.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator/pca9450-regulator.c')
| -rw-r--r-- | drivers/regulator/pca9450-regulator.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/regulator/pca9450-regulator.c b/drivers/regulator/pca9450-regulator.c index 87b4e6e29ba1..4a3ae73c600c 100644 --- a/drivers/regulator/pca9450-regulator.c +++ b/drivers/regulator/pca9450-regulator.c @@ -702,6 +702,7 @@ static int pca9450_i2c_probe(struct i2c_client *i2c, struct regulator_config config = { }; struct pca9450 *pca9450; unsigned int device_id, i; + unsigned int reset_ctrl; int ret; if (!i2c->irq) { @@ -802,9 +803,14 @@ static int pca9450_i2c_probe(struct i2c_client *i2c, return ret; } + if (of_property_read_bool(i2c->dev.of_node, "nxp,wdog_b-warm-reset")) + reset_ctrl = WDOG_B_CFG_WARM; + else + reset_ctrl = WDOG_B_CFG_COLD_LDO12; + /* Set reset behavior on assertion of WDOG_B signal */ ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_RESET_CTRL, - WDOG_B_CFG_MASK, WDOG_B_CFG_COLD_LDO12); + WDOG_B_CFG_MASK, reset_ctrl); if (ret) { dev_err(&i2c->dev, "Failed to set WDOG_B reset behavior\n"); return ret; |