scsi: ufs: qcom: Use ufshcd_rmwl() where applicable

Instead of using both ufshcd_readl() and ufshcd_writel() to read/modify/
write a register, let's make use of the existing helper.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20231208065902.11006-17-manivannan.sadhasivam@linaro.org
Tested-by: Andrew Halaney <ahalaney@redhat.com> # sa8775p-ride
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: Mani-Sadhasivam

drivers/ufs/host/ufs-qcom.c

@@ -387,9 +387,8 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
  */
 static void ufs_qcom_enable_hw_clk_gating(struct ufs_hba *hba)
 {
-	ufshcd_writel(hba,
-		ufshcd_readl(hba, REG_UFS_CFG2) | REG_UFS_CFG2_CGC_EN_ALL,
-		REG_UFS_CFG2);
+	ufshcd_rmwl(hba, REG_UFS_CFG2_CGC_EN_ALL, REG_UFS_CFG2_CGC_EN_ALL,
+		    REG_UFS_CFG2);
 
 	/* Ensure that HW clock gating is enabled before next operations */
 	mb();
@@ -1689,11 +1688,8 @@ static int ufs_qcom_config_esi(struct ufs_hba *hba)
 		platform_msi_domain_free_irqs(hba->dev);
 	} else {
 		if (host->hw_ver.major == 6 && host->hw_ver.minor == 0 &&
-		    host->hw_ver.step == 0) {
-			ufshcd_writel(hba,
-				      ufshcd_readl(hba, REG_UFS_CFG3) | 0x1F000,
-				      REG_UFS_CFG3);
-		}
+		    host->hw_ver.step == 0)
+			ufshcd_rmwl(hba, ESI_VEC_MASK, 0x1f00, REG_UFS_CFG3);
 		ufshcd_mcq_enable_esi(hba);
 	}
 

drivers/ufs/host/ufs-qcom.h

@@ -102,6 +102,9 @@ enum {
 #define TMRLUT_HW_CGC_EN	BIT(6)
 #define OCSC_HW_CGC_EN		BIT(7)
 
+/* bit definitions for REG_UFS_CFG3 register */
+#define ESI_VEC_MASK		GENMASK(22, 12)
+
 /* bit definitions for REG_UFS_PARAM0 */
 #define MAX_HS_GEAR_MASK	GENMASK(6, 4)
 #define UFS_QCOM_MAX_GEAR(x)	FIELD_GET(MAX_HS_GEAR_MASK, (x))