Messages in this thread Patch in this message | | | From | Rickard Andersson <> | Subject | [PATCH v2 4/5] regulator: pca9450: Make warm reset on WDOG_B assertion | Date | Fri, 29 Apr 2022 09:22:10 +0200 |
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From: Rickard x Andersson <rickaran@axis.com>
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> --- drivers/regulator/pca9450-regulator.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
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; -- 2.20.1
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