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-rw-r--r--src/mainboard/google/drallion/variants/drallion/gpio.c7
-rw-r--r--src/mainboard/google/drallion/variants/drallion/include/variant/gpio.h4
2 files changed, 11 insertions, 0 deletions
diff --git a/src/mainboard/google/drallion/variants/drallion/gpio.c b/src/mainboard/google/drallion/variants/drallion/gpio.c
index 154fc5a7f2..f0fc55e8d4 100644
--- a/src/mainboard/google/drallion/variants/drallion/gpio.c
+++ b/src/mainboard/google/drallion/variants/drallion/gpio.c
@@ -286,4 +286,11 @@ void variant_mainboard_post_init_params(FSPM_UPD *mupd)
FSP_M_CONFIG *fsp_m_cfg = &mupd->FspmConfig;
if (fsp_m_cfg->PchIshEnable)
fsp_m_cfg->PchIshEnable = is_ish_device_enabled();
+
+ /*
+ * Disable memory channel by HW strap pin, HW default is enable
+ * 0: Enable both DIMMs, 3: Disable both DIMMs
+ */
+ mupd->FspmConfig.DisableDimmChannel0 = gpio_get(DDR_CH0_EN) ? 0 : 3;
+ mupd->FspmConfig.DisableDimmChannel1 = gpio_get(DDR_CH1_EN) ? 0 : 3;
}
diff --git a/src/mainboard/google/drallion/variants/drallion/include/variant/gpio.h b/src/mainboard/google/drallion/variants/drallion/include/variant/gpio.h
index 251b40e0d0..219e0c4b37 100644
--- a/src/mainboard/google/drallion/variants/drallion/include/variant/gpio.h
+++ b/src/mainboard/google/drallion/variants/drallion/include/variant/gpio.h
@@ -28,6 +28,10 @@
/* Sensor detection pin */
#define SENSOR_DET_360 GPP_H5
+/* DDR channel enable pin */
+#define DDR_CH0_EN GPP_F1
+#define DDR_CH1_EN GPP_F2
+
/* Memory configuration board straps */
#define GPIO_MEM_CONFIG_0 GPP_F12
#define GPIO_MEM_CONFIG_1 GPP_F13