linux-kernel - [PATCH v2 3/7] phy: qcom: qmp-combo: introduce QPHY

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Message-Id: <20240527-topic-sm8x50-upstream-phy-combo-typec-mux-v2-3-a03e68d7b8fc@linaro.org>
Date: Mon, 27 May 2024 10:42:35 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH v2 3/7] phy: qcom: qmp-combo: introduce QPHY_MODE

Introduce an enum for the QMP Combo PHY modes, use it in the
QMP commmon phy init function and default to COMBO mode.

Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 41 +++++++++++++++++++++++++++----
 1 file changed, 36 insertions(+), 5 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
index 183cd9cd1884..788e4c05eaf2 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -61,6 +61,12 @@
 
 #define PHY_INIT_COMPLETE_TIMEOUT		10000
 
+enum qphy_mode {
+	QPHY_MODE_COMBO = 0,
+	QPHY_MODE_DP_ONLY,
+	QPHY_MODE_USB_ONLY,
+};
+
 /* set of registers with offsets different per-PHY */
 enum qphy_reg_layout {
 	/* PCS registers */
@@ -1503,6 +1509,7 @@ struct qmp_combo {
 
 	struct mutex phy_mutex;
 	int init_count;
+	enum qphy_mode init_mode;
 
 	struct phy *usb_phy;
 	enum phy_mode mode;
@@ -2589,12 +2596,33 @@ static int qmp_combo_com_init(struct qmp_combo *qmp, bool force)
 	if (qmp->orientation == TYPEC_ORIENTATION_REVERSE)
 		val |= SW_PORTSELECT_VAL;
 	writel(val, com + QPHY_V3_DP_COM_TYPEC_CTRL);
-	writel(USB3_MODE | DP_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
 
-	/* bring both QMP USB and QMP DP PHYs PCS block out of reset */
-	qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
-			SW_DPPHY_RESET_MUX | SW_DPPHY_RESET |
-			SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
+	switch (qmp->init_mode) {
+	case QPHY_MODE_COMBO:
+		writel(USB3_MODE | DP_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
+
+		/* bring both QMP USB and QMP DP PHYs PCS block out of reset */
+		qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
+				SW_DPPHY_RESET_MUX | SW_DPPHY_RESET |
+				SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
+		break;
+
+	case QPHY_MODE_DP_ONLY:
+		writel(DP_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
+
+		/* bring QMP DP PHY PCS block out of reset */
+		qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
+				SW_DPPHY_RESET_MUX | SW_DPPHY_RESET);
+		break;
+
+	case QPHY_MODE_USB_ONLY:
+		writel(USB3_MODE, com + QPHY_V3_DP_COM_PHY_MODE_CTRL);
+
+		/* bring QMP USB PHY PCS block out of reset */
+		qphy_clrbits(com, QPHY_V3_DP_COM_RESET_OVRD_CTRL,
+				SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
+		break;
+	}
 
 	qphy_clrbits(com, QPHY_V3_DP_COM_SWI_CTRL, 0x03);
 	qphy_clrbits(com, QPHY_V3_DP_COM_SW_RESET, SW_RESET);
@@ -3603,6 +3631,9 @@ static int qmp_combo_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_node_put;
 
+	/* Set PHY_MODE as combo by default */
+	qmp->init_mode = QPHY_MODE_COMBO;
+
 	qmp->usb_phy = devm_phy_create(dev, usb_np, &qmp_combo_usb_phy_ops);
 	if (IS_ERR(qmp->usb_phy)) {
 		ret = PTR_ERR(qmp->usb_phy);

-- 
2.34.1