phy: cadence: Sierra: Add support to get SSC type from device tree.

Add support to get SSC type from DT.

Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>

drivers/phy/cadence/phy-cadence-sierra.c

@@ -234,6 +234,7 @@ struct cdns_sierra_inst {
 	u32 num_lanes;
 	u32 mlane;
 	struct reset_ctl_bulk *lnk_rst;
+	enum cdns_sierra_ssc_mode ssc_mode;
 };
 
 struct cdns_reg_pairs {
@@ -318,7 +319,7 @@ static int cdns_sierra_phy_init(struct phy *gphy)
 	struct cdns_sierra_data *init_data = phy->init_data;
 	struct cdns_sierra_vals *pma_cmn_vals, *pma_ln_vals;
 	enum cdns_sierra_phy_type phy_type = ins->phy_type;
-	enum cdns_sierra_ssc_mode ssc = EXTERNAL_SSC;
+	enum cdns_sierra_ssc_mode ssc = ins->ssc_mode;
 	const struct cdns_reg_pairs *reg_pairs;
 	struct regmap *regmap = phy->regmap;
 	u32 num_regs;
@@ -546,6 +547,9 @@ static int cdns_sierra_get_optional(struct cdns_sierra_inst *inst,
 		return -EINVAL;
 	}
 
+	inst->ssc_mode = EXTERNAL_SSC;
+	ofnode_read_u32(child, "cdns,ssc-mode", &inst->ssc_mode);
+
 	return 0;
 }