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Commit 84c6b597 authored by Hemant Kumar's avatar Hemant Kumar
Browse files

usb: phy-msm-ssusb-qmp: Add support to set/clear PCS clamp enable reg 



Clearing CLAMP_EN_B in USB3_UNI_PCS_CLAMP_ENABLE reg, clamps the PHY data
inputs and enables USB3 autonomous mode. CLAMP_EN_B is set power on default
which disables USB3 autonomous mode.

Change-Id: I6e9c4404a18e0ee2d10f1e58ccd1ca52de27e5bf
Signed-off-by: default avatarHemant Kumar <hemantk@codeaurora.org>
parent 700cd930

Documentation/devicetree/bindings/usb/msm-phy.txt

+2 −0
Original line number Diff line number Diff line
@@ -101,6 +101,8 @@ Optional properties: 
 - qcom,core-voltage-level: This property must be a list of three integer

   values (no, min, max) where each value represents either a voltage in

   microvolts or a value corresponding to voltage corner.

 - "pcs_clamp_enable_reg" : Clamps the phy data inputs and enables USB3

   autonomous mode.



Example:

	ssphy0: ssphy@f9b38000 {

drivers/usb/phy/phy-msm-ssusb-qmp.c

+14 −1
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2013-2017, The Linux Foundation. All rights reserved.

 * Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -112,6 +112,7 @@ struct msm_ssphy_qmp { 
	struct usb_phy		phy;

	void __iomem		*base;

	void __iomem		*vls_clamp_reg;

	void __iomem		*pcs_clamp_enable_reg;

	void __iomem		*tcsr_usb3_dp_phymode;



	struct regulator	*vdd;
@@ -187,6 +188,8 @@ static void msm_ssusb_qmp_clamp_enable(struct msm_ssphy_qmp *phy, bool val) 
	case USB_PHY_TYPE_USB3_OR_DP:

	case USB_PHY_TYPE_USB3:

		writel_relaxed(!!val, phy->vls_clamp_reg);

		if (phy->pcs_clamp_enable_reg)

			writel_relaxed(!val, phy->pcs_clamp_enable_reg);

		break;

	default:

		break;
@@ -891,6 +894,16 @@ static int msm_ssphy_qmp_probe(struct platform_device *pdev) 
		}

	}



	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,

			"pcs_clamp_enable_reg");

	if (res) {

		phy->pcs_clamp_enable_reg = devm_ioremap_resource(dev, res);

		if (IS_ERR(phy->pcs_clamp_enable_reg)) {

			dev_err(dev, "err getting pcs_clamp_enable_reg address.\n");

			return PTR_ERR(phy->pcs_clamp_enable_reg);

		}

	}



	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,

			"tcsr_usb3_dp_phymode");

	if (res) {