linux-kernel - [PATCH v4 04/23] phy: qcom-qmp-ufs: Add support for configuring PHY in HS Series B mode

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Date:   Thu,  1 Dec 2022 23:13:09 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     martin.petersen@...cle.com, jejb@...ux.ibm.com,
        andersson@...nel.org, vkoul@...nel.org
Cc:     quic_cang@...cinc.com, quic_asutoshd@...cinc.com,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-phy@...ts.infradead.org, linux-scsi@...r.kernel.org,
        dmitry.baryshkov@...aro.org, ahalaney@...hat.com,
        abel.vesa@...aro.org, alim.akhtar@...sung.com, avri.altman@....com,
        bvanassche@....org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH v4 04/23] phy: qcom-qmp-ufs: Add support for configuring PHY in HS Series B mode

Add separate tables_hs_b instance to allow the PHY driver to configure the
PHY in HS Series B mode. The individual SoC configs need to supply the
serdes register setting in tables_hs_b and the UFS driver can request the
Series B mode by calling phy_set_mode() with mode set to PHY_MODE_UFS_HS_B.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
index 516027e356f0..2d5dd336aeb2 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
@@ -547,6 +547,8 @@ struct qmp_phy_cfg {
 
 	/* Main init sequence for PHY blocks - serdes, tx, rx, pcs */
 	const struct qmp_phy_cfg_tbls tbls;
+	/* Additional sequence for HS Series B */
+	const struct qmp_phy_cfg_tbls tbls_hs_b;
 
 	/* clock ids to be requested */
 	const char * const *clk_list;
@@ -580,6 +582,7 @@ struct qmp_ufs {
 	struct reset_control *ufs_reset;
 
 	struct phy *phy;
+	u32 mode;
 };
 
 static inline void qphy_setbits(void __iomem *base, u32 offset, u32 val)
@@ -841,6 +844,8 @@ static void qmp_ufs_pcs_init(struct qmp_ufs *qmp, const struct qmp_phy_cfg_tbls
 static void qmp_ufs_init_registers(struct qmp_ufs *qmp, const struct qmp_phy_cfg *cfg)
 {
 	qmp_ufs_serdes_init(qmp, &cfg->tbls);
+	if (qmp->mode == PHY_MODE_UFS_HS_B)
+		qmp_ufs_serdes_init(qmp, &cfg->tbls_hs_b);
 	qmp_ufs_lanes_init(qmp, &cfg->tbls);
 	qmp_ufs_pcs_init(qmp, &cfg->tbls);
 }
@@ -1011,9 +1016,19 @@ static int qmp_ufs_disable(struct phy *phy)
 	return qmp_ufs_exit(phy);
 }
 
+static int qmp_ufs_set_mode(struct phy *phy, enum phy_mode mode, int submode)
+{
+	struct qmp_ufs *qmp = phy_get_drvdata(phy);
+
+	qmp->mode = mode;
+
+	return 0;
+}
+
 static const struct phy_ops qcom_qmp_ufs_phy_ops = {
 	.power_on	= qmp_ufs_enable,
 	.power_off	= qmp_ufs_disable,
+	.set_mode	= qmp_ufs_set_mode,
 	.owner		= THIS_MODULE,
 };
 
-- 
2.25.1