diff --git a/drivers/gpu/drm/radeon/evergreen_reg.h b/drivers/gpu/drm/radeon/evergreen_reg.h
index 50948ac..76630c6b 100644
--- a/drivers/gpu/drm/radeon/evergreen_reg.h
+++ b/drivers/gpu/drm/radeon/evergreen_reg.h
@@ -44,6 +44,9 @@
 #define EVERGREEN_AUDIO_PLL1_DIV			0x5b4
 #define EVERGREEN_AUDIO_PLL1_UNK			0x5bc
 
+#define EVERGREEN_CG_IND_ADDR                           0x8f8
+#define EVERGREEN_CG_IND_DATA                           0x8fc
+
 #define EVERGREEN_AUDIO_ENABLE				0x5e78
 #define EVERGREEN_AUDIO_VENDOR_ID			0x5ec0
 
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 5bc10af..32f7640 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1852,6 +1852,8 @@
 #define WREG32_SMC(reg, v) tn_smc_wreg(rdev, (reg), (v))
 #define RREG32_RCU(reg) r600_rcu_rreg(rdev, (reg))
 #define WREG32_RCU(reg, v) r600_rcu_wreg(rdev, (reg), (v))
+#define RREG32_CG(reg) eg_cg_rreg(rdev, (reg))
+#define WREG32_CG(reg, v) eg_cg_wreg(rdev, (reg), (v))
 #define WREG32_P(reg, val, mask)				\
 	do {							\
 		uint32_t tmp_ = RREG32(reg);			\
@@ -1923,6 +1925,21 @@
 	WREG32(R600_RCU_DATA, (v));
 }
 
+static inline u32 eg_cg_rreg(struct radeon_device *rdev, u32 reg)
+{
+	u32 r;
+
+	WREG32(EVERGREEN_CG_IND_ADDR, ((reg) & 0xffff));
+	r = RREG32(EVERGREEN_CG_IND_DATA);
+	return r;
+}
+
+static inline void eg_cg_wreg(struct radeon_device *rdev, u32 reg, u32 v)
+{
+	WREG32(EVERGREEN_CG_IND_ADDR, ((reg) & 0xffff));
+	WREG32(EVERGREEN_CG_IND_DATA, (v));
+}
+
 void r100_pll_errata_after_index(struct radeon_device *rdev);