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| author | Frieder Schrempf <frieder.schrempf@kontron.de> | 2021-02-11 11:55:30 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-02-11 14:11:35 +0100 |
| commit | f7684f5a048febd2a7bc98ee81d6dce52f7268b8 (patch) | |
| tree | baf354b70f52108193ddb902f21375e2c246f823 /drivers/regulator | |
| parent | regulator: pca9450: Add SD_VSEL GPIO for LDO5 (diff) | |
| download | linux-f7684f5a048febd2a7bc98ee81d6dce52f7268b8.tar.xz linux-f7684f5a048febd2a7bc98ee81d6dce52f7268b8.zip | |
regulator: pca9450: Enable system reset on WDOG_B assertion
By default the PCA9450 doesn't handle the assertion of the WDOG_B
signal, but this is required to guarantee that things like software
resets triggered by the watchdog work reliably.
As we don't want to rely on the bootloader to enable this, we tell
the PMIC to issue a cold reset in case the WDOG_B signal is
asserted (WDOG_B_CFG = 10), just as the NXP U-Boot code does.
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Link: https://lore.kernel.org/r/20210211105534.38972-3-frieder.schrempf@kontron.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/pca9450-regulator.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/regulator/pca9450-regulator.c b/drivers/regulator/pca9450-regulator.c index 1bba8fdcb7b7..833d398c6aa2 100644 --- a/drivers/regulator/pca9450-regulator.c +++ b/drivers/regulator/pca9450-regulator.c @@ -797,6 +797,14 @@ static int pca9450_i2c_probe(struct i2c_client *i2c, return ret; } + /* 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); + if (ret) { + dev_err(&i2c->dev, "Failed to set WDOG_B reset behavior\n"); + return ret; + } + /* * The driver uses the LDO5CTRL_H register to control the LDO5 regulator. * This is only valid if the SD_VSEL input of the PMIC is high. Let's |