linux-kernel - [PATCH 02/15] phy: qcom-qmp-ufs: Add support for configuring PHY in HS Series B mode

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Date:   Sat, 29 Oct 2022 19:46:20 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     martin.petersen@...cle.com, jejb@...ux.ibm.com,
        andersson@...nel.org, vkoul@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     konrad.dybcio@...ainline.org, robh+dt@...nel.org,
        quic_cang@...cinc.com, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-phy@...ts.infradead.org, linux-scsi@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH 02/15] 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.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
index cdfda4e6d575..4c6a2b5afc9a 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
@@ -20,6 +20,8 @@
 #include <linux/reset.h>
 #include <linux/slab.h>
 
+#include <ufs/unipro.h>
+
 #include <dt-bindings/phy/phy.h>
 
 #include "phy-qcom-qmp.h"
@@ -549,6 +551,8 @@ struct qmp_phy_cfg {
 
 	/* Main init sequence for PHY blocks - serdes, tx, rx, pcs */
 	const struct qmp_phy_cfg_tables tables;
+	/* Additional sequence for HS Series B */
+	const struct qmp_phy_cfg_tables tables_hs_b;
 
 	/* clock ids to be requested */
 	const char * const *clk_list;
@@ -582,6 +586,7 @@ struct qmp_phy_cfg {
  * @rx2: iomapped memory space for second lane's rx (in dual lane PHYs)
  * @pcs_misc: iomapped memory space for lane's pcs_misc
  * @qmp: QMP phy to which this lane belongs
+ * @mode: PHY mode configured by the UFS driver
  */
 struct qmp_phy {
 	struct phy *phy;
@@ -594,6 +599,7 @@ struct qmp_phy {
 	void __iomem *rx2;
 	void __iomem *pcs_misc;
 	struct qcom_qmp *qmp;
+	u32 mode;
 };
 
 /**
@@ -983,6 +989,8 @@ static int qmp_ufs_power_on(struct phy *phy)
 	int ret;
 
 	qmp_ufs_serdes_init(qphy, &cfg->tables);
+	if (qphy->mode == PHY_MODE_UFS_HS_B)
+		qmp_ufs_serdes_init(qphy, &cfg->tables_hs_b);
 
 	qmp_ufs_lanes_init(qphy, &cfg->tables);
 
@@ -1070,6 +1078,15 @@ 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_phy *qphy = phy_get_drvdata(phy);
+
+	qphy->mode = mode;
+
+	return 0;
+}
+
 static int qmp_ufs_vreg_init(struct device *dev, const struct qmp_phy_cfg *cfg)
 {
 	struct qcom_qmp *qmp = dev_get_drvdata(dev);
@@ -1105,6 +1122,7 @@ static int qmp_ufs_clk_init(struct device *dev, const struct qmp_phy_cfg *cfg)
 static const struct phy_ops qcom_qmp_ufs_ops = {
 	.power_on	= qmp_ufs_enable,
 	.power_off	= qmp_ufs_disable,
+	.set_mode	= qmp_ufs_set_mode,
 	.owner		= THIS_MODULE,
 };
 
-- 
2.25.1