phy: qcom-qmp-combo: clean up power-down handling

Always define the POWER_DOWN_CONTROL register instead of falling back to
the v2 (and v3) offset during power on and power off.
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20221017065013.19647-8-johan+linaro@kernel.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/qualcomm/phy-qcom-qmp-combo.c

@@ -121,6 +121,7 @@ static const unsigned int qmp_v3_usb3phy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	[QPHY_SW_RESET]			= 0x00,
 	[QPHY_START_CTRL]		= 0x08,
 	[QPHY_PCS_STATUS]		= 0x174,
+	[QPHY_PCS_POWER_DOWN_CONTROL]	= 0x04,
 	[QPHY_PCS_AUTONOMOUS_MODE_CTRL]	= 0x0d8,
 	[QPHY_PCS_LFPS_RXTERM_IRQ_CLEAR]  = 0x0dc,
 	[QPHY_PCS_LFPS_RXTERM_IRQ_STATUS] = 0x170,
@@ -1991,13 +1992,8 @@ static int qmp_combo_com_init(struct qmp_phy *qphy)
 	qphy_clrbits(dp_com, QPHY_V3_DP_COM_SWI_CTRL, 0x03);
 	qphy_clrbits(dp_com, QPHY_V3_DP_COM_SW_RESET, SW_RESET);
 
-	if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL])
-		qphy_setbits(pcs,
-				cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-				cfg->pwrdn_ctrl);
-	else
-		qphy_setbits(pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
-				cfg->pwrdn_ctrl);
+	qphy_setbits(pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
+			cfg->pwrdn_ctrl);
 
 	mutex_unlock(&qmp->phy_mutex);
 
@@ -2144,13 +2140,8 @@ static int qmp_combo_power_off(struct phy *phy)
 		qphy_clrbits(qphy->pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
 
 		/* Put PHY into POWER DOWN state: active low */
-		if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL]) {
-			qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-				     cfg->pwrdn_ctrl);
-		} else {
-			qphy_clrbits(qphy->pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
-					cfg->pwrdn_ctrl);
-		}
+		qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
+				cfg->pwrdn_ctrl);
 	}
 
 	return 0;