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-rw-r--r--src/superio/ite/common/env_ctrl.c7
-rw-r--r--src/superio/ite/common/env_ctrl_chip.h5
2 files changed, 12 insertions, 0 deletions
diff --git a/src/superio/ite/common/env_ctrl.c b/src/superio/ite/common/env_ctrl.c
index fbf74468b0..8668110713 100644
--- a/src/superio/ite/common/env_ctrl.c
+++ b/src/superio/ite/common/env_ctrl.c
@@ -264,6 +264,13 @@ void ite_ec_init(const u16 base, const struct ite_ec_config *const conf)
ITE_EC_INTERFACE_SMB_ENABLE);
}
+ /* Set SST/PECI Host Controller Clock to either 24 MHz or internal 32 MHz */
+ if (conf->smbus_24mhz) {
+ pnp_write_hwm5_index(base, ITE_EC_INTERFACE_SELECT,
+ pnp_read_hwm5_index(base, ITE_EC_INTERFACE_SELECT) |
+ ITE_EC_INTERFACE_CLOCK_24MHZ);
+ }
+
/* Enable reading of voltage pins */
pnp_write_hwm5_index(base, ITE_EC_ADC_VOLTAGE_CHANNEL_ENABLE, conf->vin_mask);
diff --git a/src/superio/ite/common/env_ctrl_chip.h b/src/superio/ite/common/env_ctrl_chip.h
index 09577a4d84..fa896e4074 100644
--- a/src/superio/ite/common/env_ctrl_chip.h
+++ b/src/superio/ite/common/env_ctrl_chip.h
@@ -91,6 +91,11 @@ struct ite_ec_config {
* Enable SMBus for external thermal sensor.
*/
bool smbus_en;
+ /*
+ * Select 24 MHz clock for external host instead of an
+ * internally generated 32 MHz clock.
+ */
+ bool smbus_24mhz;
};
/* Some shorthands for device trees */