Commit 4708ee37 authored by Li Jun's avatar Li Jun Committed by Vinod Koul
Browse files

phy: freescale: imx8mq-usb: add support for imx8mp usb phy 



Add initial support for imx8mp usb phy support, imx8mp usb has
a silimar phy as imx8mq, which has some different customizations
on clock and low power design when SoC integration.

Signed-off-by: default avatarLi Jun <jun.li@nxp.com>
Link: https://lore.kernel.org/r/1598276014-2377-2-git-send-email-jun.li@nxp.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent e8bd1cd9

drivers/phy/freescale/phy-fsl-imx8mq-usb.c

+70 −7
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0+

/* Copyright (c) 2017 NXP. */



#include <linux/bitfield.h>

#include <linux/clk.h>

#include <linux/delay.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/of_platform.h>

#include <linux/phy/phy.h>

#include <linux/platform_device.h>

#include <linux/regulator/consumer.h>



#define PHY_CTRL0			0x0

#define PHY_CTRL0_REF_SSP_EN		BIT(2)

#define PHY_CTRL0_FSEL_MASK		GENMASK(10, 5)

#define PHY_CTRL0_FSEL_24M		0x2a



#define PHY_CTRL1			0x4

#define PHY_CTRL1_RESET			BIT(0)
@@ -20,6 +25,11 @@ 


#define PHY_CTRL2			0x8

#define PHY_CTRL2_TXENABLEN0		BIT(8)

#define PHY_CTRL2_OTG_DISABLE		BIT(9)



#define PHY_CTRL6			0x18

#define PHY_CTRL6_ALT_CLK_EN		BIT(1)

#define PHY_CTRL6_ALT_CLK_SEL		BIT(0)



struct imx8mq_usb_phy {

	struct phy *phy;
@@ -54,6 +64,44 @@ static int imx8mq_usb_phy_init(struct phy *phy) 
	return 0;

}



static int imx8mp_usb_phy_init(struct phy *phy)

{

	struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy);

	u32 value;



	/* USB3.0 PHY signal fsel for 24M ref */

	value = readl(imx_phy->base + PHY_CTRL0);

	value &= ~PHY_CTRL0_FSEL_MASK;

	value |= FIELD_PREP(PHY_CTRL0_FSEL_MASK, PHY_CTRL0_FSEL_24M);

	writel(value, imx_phy->base + PHY_CTRL0);



	/* Disable alt_clk_en and use internal MPLL clocks */

	value = readl(imx_phy->base + PHY_CTRL6);

	value &= ~(PHY_CTRL6_ALT_CLK_SEL | PHY_CTRL6_ALT_CLK_EN);

	writel(value, imx_phy->base + PHY_CTRL6);



	value = readl(imx_phy->base + PHY_CTRL1);

	value &= ~(PHY_CTRL1_VDATSRCENB0 | PHY_CTRL1_VDATDETENB0);

	value |= PHY_CTRL1_RESET | PHY_CTRL1_ATERESET;

	writel(value, imx_phy->base + PHY_CTRL1);



	value = readl(imx_phy->base + PHY_CTRL0);

	value |= PHY_CTRL0_REF_SSP_EN;

	writel(value, imx_phy->base + PHY_CTRL0);



	value = readl(imx_phy->base + PHY_CTRL2);

	value |= PHY_CTRL2_TXENABLEN0 | PHY_CTRL2_OTG_DISABLE;

	writel(value, imx_phy->base + PHY_CTRL2);



	udelay(10);



	value = readl(imx_phy->base + PHY_CTRL1);

	value &= ~(PHY_CTRL1_RESET | PHY_CTRL1_ATERESET);

	writel(value, imx_phy->base + PHY_CTRL1);



	return 0;

}



static int imx8mq_phy_power_on(struct phy *phy)

{

	struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy);
@@ -83,12 +131,29 @@ static struct phy_ops imx8mq_usb_phy_ops = { 
	.owner		= THIS_MODULE,

};



static struct phy_ops imx8mp_usb_phy_ops = {

	.init		= imx8mp_usb_phy_init,

	.power_on	= imx8mq_phy_power_on,

	.power_off	= imx8mq_phy_power_off,

	.owner		= THIS_MODULE,

};



static const struct of_device_id imx8mq_usb_phy_of_match[] = {

	{.compatible = "fsl,imx8mq-usb-phy",

	 .data = &imx8mq_usb_phy_ops,},

	{.compatible = "fsl,imx8mp-usb-phy",

	 .data = &imx8mp_usb_phy_ops,},

	{ }

};

MODULE_DEVICE_TABLE(of, imx8mq_usb_phy_of_match);



static int imx8mq_usb_phy_probe(struct platform_device *pdev)

{

	struct phy_provider *phy_provider;

	struct device *dev = &pdev->dev;

	struct imx8mq_usb_phy *imx_phy;

	struct resource *res;

	const struct phy_ops *phy_ops;



	imx_phy = devm_kzalloc(dev, sizeof(*imx_phy), GFP_KERNEL);

	if (!imx_phy)
@@ -105,7 +170,11 @@ static int imx8mq_usb_phy_probe(struct platform_device *pdev) 
	if (IS_ERR(imx_phy->base))

		return PTR_ERR(imx_phy->base);



	imx_phy->phy = devm_phy_create(dev, NULL, &imx8mq_usb_phy_ops);

	phy_ops = of_device_get_match_data(dev);

	if (!phy_ops)

		return -EINVAL;



	imx_phy->phy = devm_phy_create(dev, NULL, phy_ops);

	if (IS_ERR(imx_phy->phy))

		return PTR_ERR(imx_phy->phy);
@@ -120,12 +189,6 @@ static int imx8mq_usb_phy_probe(struct platform_device *pdev) 
	return PTR_ERR_OR_ZERO(phy_provider);

}



static const struct of_device_id imx8mq_usb_phy_of_match[] = {

	{.compatible = "fsl,imx8mq-usb-phy",},

	{ },

};

MODULE_DEVICE_TABLE(of, imx8mq_usb_phy_of_match);



static struct platform_driver imx8mq_usb_phy_driver = {

	.probe	= imx8mq_usb_phy_probe,

	.driver = {