diff options
| author | Marek Vasut <[email protected]> | 2022-12-09 20:35:46 +0100 |
|---|---|---|
| committer | Stefano Babic <[email protected]> | 2023-01-30 23:23:01 +0100 |
| commit | 910c7a881f5b64dc92d3ba9232ce59ae54fd6486 (patch) | |
| tree | dbca00482ee4ff762328d6249d2e1c3bc1ee982c /drivers | |
| parent | f75e92f7f7bffe724dccd6769b37f95e0aa7842c (diff) | |
pmic: 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.
The implementation is taken almost verbatim from Linux commit
2364a64d0673f ("regulator: pca9450: Make warm reset on WDOG_B assertion")
Signed-off-by: Marek Vasut <[email protected]>
Reviewed-by: Fabio Estevam <[email protected]>
Reviewed-by: Peng Fan <[email protected]>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/pmic/pca9450.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/power/pmic/pca9450.c b/drivers/power/pmic/pca9450.c index a186edc08da..2427abfb7a5 100644 --- a/drivers/power/pmic/pca9450.c +++ b/drivers/power/pmic/pca9450.c @@ -86,6 +86,7 @@ static int pca9450_bind(struct udevice *dev) static int pca9450_probe(struct udevice *dev) { struct pca9450_priv *priv = dev_get_priv(dev); + unsigned int reset_ctrl; int ret = 0; if (CONFIG_IS_ENABLED(DM_GPIO) && CONFIG_IS_ENABLED(DM_REGULATOR_PCA9450)) { @@ -95,10 +96,18 @@ static int pca9450_probe(struct udevice *dev) if (IS_ERR(priv->sd_vsel_gpio)) { ret = PTR_ERR(priv->sd_vsel_gpio); dev_err(dev, "Failed to request SD_VSEL GPIO: %d\n", ret); + if (ret) + return ret; } } - return ret; + if (ofnode_read_bool(dev_ofnode(dev), "nxp,wdog_b-warm-reset")) + reset_ctrl = PCA9450_PMIC_RESET_WDOG_B_CFG_WARM; + else + reset_ctrl = PCA9450_PMIC_RESET_WDOG_B_CFG_COLD_LDO12; + + return pmic_clrsetbits(dev, PCA9450_RESET_CTRL, + PCA9450_PMIC_RESET_WDOG_B_CFG_MASK, reset_ctrl); } static struct dm_pmic_ops pca9450_ops = { |