Unverified Commit 2364a64d authored by Rickard x Andersson's avatar Rickard x Andersson Committed by Mark Brown
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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: default avatarRickard x Andersson <rickaran@axis.com>
Link: https://lore.kernel.org/r/20220429072211.24957-4-rickaran@axis.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent bd2f5e71

drivers/regulator/pca9450-regulator.c

+7 −1
Original line number Diff line number Diff line
@@ -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;