ITE: drivers/pinctrl: Add condition of support voltage selection
Since not all GPIOs support voltage selection, configure voltage
selection register only if it is present.
Signed-off-by: Tim Lin <tim2.lin@ite.corp-partner.google.com>
diff --git a/drivers/pinctrl/pinctrl_ite_it8xxx2.c b/drivers/pinctrl/pinctrl_ite_it8xxx2.c
index 25e9dd9..3c8af74 100644
--- a/drivers/pinctrl/pinctrl_ite_it8xxx2.c
+++ b/drivers/pinctrl/pinctrl_ite_it8xxx2.c
@@ -91,22 +91,28 @@
return -EINVAL;
}
- /* Setting voltage 3.3V or 1.8V. */
- switch (IT8XXX2_DT_PINCFG_VOLTAGE(pincfg)) {
- case IT8XXX2_VOLTAGE_3V3:
- /* Input voltage selection 3.3V. */
- *reg_volt_sel &= ~gpio->volt_sel_mask[pin];
- break;
- case IT8XXX2_VOLTAGE_1V8:
- __ASSERT(!(IT8XXX2_DT_PINCFG_PUPDR(pincfg)
- == IT8XXX2_PULL_UP),
- "Don't enable internal pullup if 1.8V voltage is used");
- /* Input voltage selection 1.8V. */
- *reg_volt_sel |= gpio->volt_sel_mask[pin];
- break;
- default:
- LOG_ERR("The voltage selection is not supported");
- return -EINVAL;
+ /*
+ * Since not all GPIOs support voltage selection, configure voltage
+ * selection register only if it is present.
+ */
+ if (reg_volt_sel != NULL) {
+ /* Setting voltage 3.3V or 1.8V. */
+ switch (IT8XXX2_DT_PINCFG_VOLTAGE(pincfg)) {
+ case IT8XXX2_VOLTAGE_3V3:
+ /* Input voltage selection 3.3V. */
+ *reg_volt_sel &= ~gpio->volt_sel_mask[pin];
+ break;
+ case IT8XXX2_VOLTAGE_1V8:
+ __ASSERT(!(IT8XXX2_DT_PINCFG_PUPDR(pincfg)
+ == IT8XXX2_PULL_UP),
+ "Don't enable internal pullup if 1.8V voltage is used");
+ /* Input voltage selection 1.8V. */
+ *reg_volt_sel |= gpio->volt_sel_mask[pin];
+ break;
+ default:
+ LOG_ERR("The voltage selection is not supported");
+ return -EINVAL;
+ }
}
/* Setting tri-state mode. */
