regulator: max77620: Use device_set_of_node_from_dev()

The MAX77620 driver fails to re-probe on deferred probe because driver
core tries to claim resources that are already claimed by the PINCTRL
device. Use device_set_of_node_from_dev() helper which marks OF node as
reused, skipping erroneous execution of pinctrl_bind_pins() for the PMIC
device on the re-probe.

Fixes: aea6cb99703e ("regulator: resolve supply after creating regulator")
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20210523224243.13219-2-digetx@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/max77620-regulator.c b/drivers/regulator/max77620-regulator.c
index 8d9731e..5c439c8 100644 (file)
--- a/drivers/regulator/max77620-regulator.c
+++ b/drivers/regulator/max77620-regulator.c
@@ -814,6 +814,13 @@ static int max77620_regulator_probe(struct platform_device *pdev)
        config.dev = dev;
        config.driver_data = pmic;
 
+       /*
+        * Set of_node_reuse flag to prevent driver core from attempting to
+        * claim any pinmux resources already claimed by the parent device.
+        * Otherwise PMIC driver will fail to re-probe.
+        */
+       device_set_of_node_from_dev(&pdev->dev, pdev->dev.parent);
+
        for (id = 0; id < MAX77620_NUM_REGS; id++) {
                struct regulator_dev *rdev;
                struct regulator_desc *rdesc;