Commit 64562e99 authored by Pratyush Anand's avatar Pratyush Anand Committed by Viresh Kumar
Browse files

phy: Add drivers for PCIe and SATA phy on SPEAr13xx 



ARM based ST Microelectronics's SPEAr1310/40 platforms uses ST's phy (known as
'miphy') for PCIe and SATA. This patch adds drivers for these miphys.

This also adds proper bindings for miphys.

Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarPratyush Anand <pratyush.anand@st.com>
Tested-by: default avatarMohit Kumar <mohit.kumar@st.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
[viresh: fixed logs/cclist/checkpatch warnings, broken into smaller patches]
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent 51b66a6c

Documentation/devicetree/bindings/phy/st-spear-miphy.txt

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ST SPEAr miphy DT details

=========================



ST Microelectronics SPEAr miphy is a phy controller supporting PCIe and SATA.



Required properties:

- compatible : should be "st,spear1310-miphy" or "st,spear1340-miphy"

- reg : offset and length of the PHY register set.

- misc: phandle for the syscon node to access misc registers

- #phy-cells : from the generic PHY bindings, must be 1.

	- cell[1]: 0 if phy used for SATA, 1 for PCIe.



Optional properties:

- phy-id: Instance id of the phy. Only required when there are multiple phys

  present on a implementation.

drivers/phy/Kconfig

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@@ -178,4 +178,16 @@ config PHY_XGENE 
	help

	  This option enables support for APM X-Gene SoC multi-purpose PHY.



config PHY_ST_SPEAR1310_MIPHY

	tristate "ST SPEAR1310-MIPHY driver"

	select GENERIC_PHY

	help

	  Support for ST SPEAr1310 MIPHY which can be used for PCIe and SATA.



config PHY_ST_SPEAR1340_MIPHY

	tristate "ST SPEAR1340-MIPHY driver"

	select GENERIC_PHY

	help

	  Support for ST SPEAr1340 MIPHY which can be used for PCIe and SATA.



endmenu

drivers/phy/Makefile

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@@ -20,3 +20,5 @@ phy-exynos-usb2-$(CONFIG_PHY_EXYNOS4X12_USB2) += phy-exynos4x12-usb2.o 
phy-exynos-usb2-$(CONFIG_PHY_EXYNOS5250_USB2)	+= phy-exynos5250-usb2.o

obj-$(CONFIG_PHY_EXYNOS5_USBDRD)	+= phy-exynos5-usbdrd.o

obj-$(CONFIG_PHY_XGENE)			+= phy-xgene.o

obj-$(CONFIG_PHY_ST_SPEAR1310_MIPHY)	+= phy-spear1310-miphy.o

obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY)	+= phy-spear1340-miphy.o

drivers/phy/phy-spear1310-miphy.c

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/*

 * ST SPEAr1310-miphy driver

 *

 * Copyright (C) 2014 ST Microelectronics

 * Pratyush Anand <pratyush.anand@st.com>

 * Mohit Kumar <mohit.kumar@st.com>

 *

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

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 */



#include <linux/bitops.h>

#include <linux/delay.h>

#include <linux/dma-mapping.h>

#include <linux/kernel.h>

#include <linux/mfd/syscon.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/phy/phy.h>

#include <linux/regmap.h>



/* SPEAr1310 Registers */

#define SPEAR1310_PCIE_SATA_CFG			0x3A4

	#define SPEAR1310_PCIE_SATA2_SEL_PCIE		(0 << 31)

	#define SPEAR1310_PCIE_SATA1_SEL_PCIE		(0 << 30)

	#define SPEAR1310_PCIE_SATA0_SEL_PCIE		(0 << 29)

	#define SPEAR1310_PCIE_SATA2_SEL_SATA		BIT(31)

	#define SPEAR1310_PCIE_SATA1_SEL_SATA		BIT(30)

	#define SPEAR1310_PCIE_SATA0_SEL_SATA		BIT(29)

	#define SPEAR1310_SATA2_CFG_TX_CLK_EN		BIT(27)

	#define SPEAR1310_SATA2_CFG_RX_CLK_EN		BIT(26)

	#define SPEAR1310_SATA2_CFG_POWERUP_RESET	BIT(25)

	#define SPEAR1310_SATA2_CFG_PM_CLK_EN		BIT(24)

	#define SPEAR1310_SATA1_CFG_TX_CLK_EN		BIT(23)

	#define SPEAR1310_SATA1_CFG_RX_CLK_EN		BIT(22)

	#define SPEAR1310_SATA1_CFG_POWERUP_RESET	BIT(21)

	#define SPEAR1310_SATA1_CFG_PM_CLK_EN		BIT(20)

	#define SPEAR1310_SATA0_CFG_TX_CLK_EN		BIT(19)

	#define SPEAR1310_SATA0_CFG_RX_CLK_EN		BIT(18)

	#define SPEAR1310_SATA0_CFG_POWERUP_RESET	BIT(17)

	#define SPEAR1310_SATA0_CFG_PM_CLK_EN		BIT(16)

	#define SPEAR1310_PCIE2_CFG_DEVICE_PRESENT	BIT(11)

	#define SPEAR1310_PCIE2_CFG_POWERUP_RESET	BIT(10)

	#define SPEAR1310_PCIE2_CFG_CORE_CLK_EN		BIT(9)

	#define SPEAR1310_PCIE2_CFG_AUX_CLK_EN		BIT(8)

	#define SPEAR1310_PCIE1_CFG_DEVICE_PRESENT	BIT(7)

	#define SPEAR1310_PCIE1_CFG_POWERUP_RESET	BIT(6)

	#define SPEAR1310_PCIE1_CFG_CORE_CLK_EN		BIT(5)

	#define SPEAR1310_PCIE1_CFG_AUX_CLK_EN		BIT(4)

	#define SPEAR1310_PCIE0_CFG_DEVICE_PRESENT	BIT(3)

	#define SPEAR1310_PCIE0_CFG_POWERUP_RESET	BIT(2)

	#define SPEAR1310_PCIE0_CFG_CORE_CLK_EN		BIT(1)

	#define SPEAR1310_PCIE0_CFG_AUX_CLK_EN		BIT(0)



	#define SPEAR1310_PCIE_CFG_MASK(x) ((0xF << (x * 4)) | BIT((x + 29)))

	#define SPEAR1310_SATA_CFG_MASK(x) ((0xF << (x * 4 + 16)) | \

			BIT((x + 29)))

	#define SPEAR1310_PCIE_CFG_VAL(x) \

			(SPEAR1310_PCIE_SATA##x##_SEL_PCIE | \

			SPEAR1310_PCIE##x##_CFG_AUX_CLK_EN | \

			SPEAR1310_PCIE##x##_CFG_CORE_CLK_EN | \

			SPEAR1310_PCIE##x##_CFG_POWERUP_RESET | \

			SPEAR1310_PCIE##x##_CFG_DEVICE_PRESENT)

	#define SPEAR1310_SATA_CFG_VAL(x) \

			(SPEAR1310_PCIE_SATA##x##_SEL_SATA | \

			SPEAR1310_SATA##x##_CFG_PM_CLK_EN | \

			SPEAR1310_SATA##x##_CFG_POWERUP_RESET | \

			SPEAR1310_SATA##x##_CFG_RX_CLK_EN | \

			SPEAR1310_SATA##x##_CFG_TX_CLK_EN)



#define SPEAR1310_PCIE_MIPHY_CFG_1		0x3A8

	#define SPEAR1310_MIPHY_DUAL_OSC_BYPASS_EXT	BIT(31)

	#define SPEAR1310_MIPHY_DUAL_CLK_REF_DIV2	BIT(28)

	#define SPEAR1310_MIPHY_DUAL_PLL_RATIO_TOP(x)	(x << 16)

	#define SPEAR1310_MIPHY_SINGLE_OSC_BYPASS_EXT	BIT(15)

	#define SPEAR1310_MIPHY_SINGLE_CLK_REF_DIV2	BIT(12)

	#define SPEAR1310_MIPHY_SINGLE_PLL_RATIO_TOP(x)	(x << 0)

	#define SPEAR1310_PCIE_SATA_MIPHY_CFG_SATA_MASK (0xFFFF)

	#define SPEAR1310_PCIE_SATA_MIPHY_CFG_PCIE_MASK (0xFFFF << 16)

	#define SPEAR1310_PCIE_SATA_MIPHY_CFG_SATA \

			(SPEAR1310_MIPHY_DUAL_OSC_BYPASS_EXT | \

			SPEAR1310_MIPHY_DUAL_CLK_REF_DIV2 | \

			SPEAR1310_MIPHY_DUAL_PLL_RATIO_TOP(60) | \

			SPEAR1310_MIPHY_SINGLE_OSC_BYPASS_EXT | \

			SPEAR1310_MIPHY_SINGLE_CLK_REF_DIV2 | \

			SPEAR1310_MIPHY_SINGLE_PLL_RATIO_TOP(60))

	#define SPEAR1310_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK \

			(SPEAR1310_MIPHY_SINGLE_PLL_RATIO_TOP(120))

	#define SPEAR1310_PCIE_SATA_MIPHY_CFG_PCIE \

			(SPEAR1310_MIPHY_DUAL_OSC_BYPASS_EXT | \

			SPEAR1310_MIPHY_DUAL_PLL_RATIO_TOP(25) | \

			SPEAR1310_MIPHY_SINGLE_OSC_BYPASS_EXT | \

			SPEAR1310_MIPHY_SINGLE_PLL_RATIO_TOP(25))



#define SPEAR1310_PCIE_MIPHY_CFG_2		0x3AC



enum spear1310_miphy_mode {

	SATA,

	PCIE,

};



struct spear1310_miphy_priv {

	/* instance id of this phy */

	u32				id;

	/* phy mode: 0 for SATA 1 for PCIe */

	enum spear1310_miphy_mode	mode;

	/* regmap for any soc specific misc registers */

	struct regmap			*misc;

	/* phy struct pointer */

	struct phy			*phy;

};



static int spear1310_miphy_pcie_init(struct spear1310_miphy_priv *priv)

{

	u32 val;



	regmap_update_bits(priv->misc, SPEAR1310_PCIE_MIPHY_CFG_1,

			   SPEAR1310_PCIE_SATA_MIPHY_CFG_PCIE_MASK,

			   SPEAR1310_PCIE_SATA_MIPHY_CFG_PCIE);



	switch (priv->id) {

	case 0:

		val = SPEAR1310_PCIE_CFG_VAL(0);

		break;

	case 1:

		val = SPEAR1310_PCIE_CFG_VAL(1);

		break;

	case 2:

		val = SPEAR1310_PCIE_CFG_VAL(2);

		break;

	default:

		return -EINVAL;

	}



	regmap_update_bits(priv->misc, SPEAR1310_PCIE_SATA_CFG,

			   SPEAR1310_PCIE_CFG_MASK(priv->id), val);



	return 0;

}



static int spear1310_miphy_pcie_exit(struct spear1310_miphy_priv *priv)

{

	regmap_update_bits(priv->misc, SPEAR1310_PCIE_SATA_CFG,

			   SPEAR1310_PCIE_CFG_MASK(priv->id), 0);



	regmap_update_bits(priv->misc, SPEAR1310_PCIE_MIPHY_CFG_1,

			   SPEAR1310_PCIE_SATA_MIPHY_CFG_PCIE_MASK, 0);



	return 0;

}



static int spear1310_miphy_init(struct phy *phy)

{

	struct spear1310_miphy_priv *priv = phy_get_drvdata(phy);

	int ret = 0;



	if (priv->mode == PCIE)

		ret = spear1310_miphy_pcie_init(priv);



	return ret;

}



static int spear1310_miphy_exit(struct phy *phy)

{

	struct spear1310_miphy_priv *priv = phy_get_drvdata(phy);

	int ret = 0;



	if (priv->mode == PCIE)

		ret = spear1310_miphy_pcie_exit(priv);



	return ret;

}



static const struct of_device_id spear1310_miphy_of_match[] = {

	{ .compatible = "st,spear1310-miphy" },

	{ },

};

MODULE_DEVICE_TABLE(of, spear1310_miphy_of_match);



static struct phy_ops spear1310_miphy_ops = {

	.init = spear1310_miphy_init,

	.exit = spear1310_miphy_exit,

	.owner = THIS_MODULE,

};



static struct phy *spear1310_miphy_xlate(struct device *dev,

					 struct of_phandle_args *args)

{

	struct spear1310_miphy_priv *priv = dev_get_drvdata(dev);



	if (args->args_count < 1) {

		dev_err(dev, "DT did not pass correct no of args\n");

		return NULL;

	}



	priv->mode = args->args[0];



	if (priv->mode != SATA && priv->mode != PCIE) {

		dev_err(dev, "DT did not pass correct phy mode\n");

		return NULL;

	}



	return priv->phy;

}



static int spear1310_miphy_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct spear1310_miphy_priv *priv;

	struct phy_provider *phy_provider;



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

	if (!priv) {

		dev_err(dev, "can't alloc spear1310_miphy private date memory\n");

		return -ENOMEM;

	}



	priv->misc =

		syscon_regmap_lookup_by_phandle(dev->of_node, "misc");

	if (IS_ERR(priv->misc)) {

		dev_err(dev, "failed to find misc regmap\n");

		return PTR_ERR(priv->misc);

	}



	if (of_property_read_u32(dev->of_node, "phy-id", &priv->id)) {

		dev_err(dev, "failed to find phy id\n");

		return -EINVAL;

	}



	priv->phy = devm_phy_create(dev, &spear1310_miphy_ops, NULL);

	if (IS_ERR(priv->phy)) {

		dev_err(dev, "failed to create SATA PCIe PHY\n");

		return PTR_ERR(priv->phy);

	}



	dev_set_drvdata(dev, priv);

	phy_set_drvdata(priv->phy, priv);



	phy_provider =

		devm_of_phy_provider_register(dev, spear1310_miphy_xlate);

	if (IS_ERR(phy_provider)) {

		dev_err(dev, "failed to register phy provider\n");

		return PTR_ERR(phy_provider);

	}



	return 0;

}



static struct platform_driver spear1310_miphy_driver = {

	.probe		= spear1310_miphy_probe,

	.driver = {

		.name = "spear1310-miphy",

		.owner = THIS_MODULE,

		.of_match_table = of_match_ptr(spear1310_miphy_of_match),

	},

};



static int __init spear1310_miphy_phy_init(void)

{

	return platform_driver_register(&spear1310_miphy_driver);

}

module_init(spear1310_miphy_phy_init);



static void __exit spear1310_miphy_phy_exit(void)

{

	platform_driver_unregister(&spear1310_miphy_driver);

}

module_exit(spear1310_miphy_phy_exit);



MODULE_DESCRIPTION("ST SPEAR1310-MIPHY driver");

MODULE_AUTHOR("Pratyush Anand <pratyush.anand@st.com>");

MODULE_LICENSE("GPL v2");

drivers/phy/phy-spear1340-miphy.c

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/*

 * ST spear1340-miphy driver

 *

 * Copyright (C) 2014 ST Microelectronics

 * Pratyush Anand <pratyush.anand@st.com>

 * Mohit Kumar <mohit.kumar@st.com>

 *

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

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 */



#include <linux/bitops.h>

#include <linux/delay.h>

#include <linux/dma-mapping.h>

#include <linux/kernel.h>

#include <linux/mfd/syscon.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/phy/phy.h>

#include <linux/regmap.h>



/* SPEAr1340 Registers */

/* Power Management Registers */

#define SPEAR1340_PCM_CFG			0x100

	#define SPEAR1340_PCM_CFG_SATA_POWER_EN		BIT(11)

#define SPEAR1340_PCM_WKUP_CFG			0x104

#define SPEAR1340_SWITCH_CTR			0x108



#define SPEAR1340_PERIP1_SW_RST			0x318

	#define SPEAR1340_PERIP1_SW_RSATA		BIT(12)

#define SPEAR1340_PERIP2_SW_RST			0x31C

#define SPEAR1340_PERIP3_SW_RST			0x320



/* PCIE - SATA configuration registers */

#define SPEAR1340_PCIE_SATA_CFG			0x424

	/* PCIE CFG MASks */

	#define SPEAR1340_PCIE_CFG_DEVICE_PRESENT	BIT(11)

	#define SPEAR1340_PCIE_CFG_POWERUP_RESET	BIT(10)

	#define SPEAR1340_PCIE_CFG_CORE_CLK_EN		BIT(9)

	#define SPEAR1340_PCIE_CFG_AUX_CLK_EN		BIT(8)

	#define SPEAR1340_SATA_CFG_TX_CLK_EN		BIT(4)

	#define SPEAR1340_SATA_CFG_RX_CLK_EN		BIT(3)

	#define SPEAR1340_SATA_CFG_POWERUP_RESET	BIT(2)

	#define SPEAR1340_SATA_CFG_PM_CLK_EN		BIT(1)

	#define SPEAR1340_PCIE_SATA_SEL_PCIE		(0)

	#define SPEAR1340_PCIE_SATA_SEL_SATA		(1)

	#define SPEAR1340_PCIE_SATA_CFG_MASK		0xF1F

	#define SPEAR1340_PCIE_CFG_VAL	(SPEAR1340_PCIE_SATA_SEL_PCIE | \

			SPEAR1340_PCIE_CFG_AUX_CLK_EN | \

			SPEAR1340_PCIE_CFG_CORE_CLK_EN | \

			SPEAR1340_PCIE_CFG_POWERUP_RESET | \

			SPEAR1340_PCIE_CFG_DEVICE_PRESENT)

	#define SPEAR1340_SATA_CFG_VAL	(SPEAR1340_PCIE_SATA_SEL_SATA | \

			SPEAR1340_SATA_CFG_PM_CLK_EN | \

			SPEAR1340_SATA_CFG_POWERUP_RESET | \

			SPEAR1340_SATA_CFG_RX_CLK_EN | \

			SPEAR1340_SATA_CFG_TX_CLK_EN)



#define SPEAR1340_PCIE_MIPHY_CFG		0x428

	#define SPEAR1340_MIPHY_OSC_BYPASS_EXT		BIT(31)

	#define SPEAR1340_MIPHY_CLK_REF_DIV2		BIT(27)

	#define SPEAR1340_MIPHY_CLK_REF_DIV4		(2 << 27)

	#define SPEAR1340_MIPHY_CLK_REF_DIV8		(3 << 27)

	#define SPEAR1340_MIPHY_PLL_RATIO_TOP(x)	(x << 0)

	#define SPEAR1340_PCIE_MIPHY_CFG_MASK		0xF80000FF

	#define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA \

			(SPEAR1340_MIPHY_OSC_BYPASS_EXT | \

			SPEAR1340_MIPHY_CLK_REF_DIV2 | \

			SPEAR1340_MIPHY_PLL_RATIO_TOP(60))

	#define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK \

			(SPEAR1340_MIPHY_PLL_RATIO_TOP(120))

	#define SPEAR1340_PCIE_SATA_MIPHY_CFG_PCIE \

			(SPEAR1340_MIPHY_OSC_BYPASS_EXT | \

			SPEAR1340_MIPHY_PLL_RATIO_TOP(25))



enum spear1340_miphy_mode {

	SATA,

	PCIE,

};



struct spear1340_miphy_priv {

	/* phy mode: 0 for SATA 1 for PCIe */

	enum spear1340_miphy_mode	mode;

	/* regmap for any soc specific misc registers */

	struct regmap			*misc;

	/* phy struct pointer */

	struct phy			*phy;

};



static int spear1340_miphy_sata_init(struct spear1340_miphy_priv *priv)

{

	regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,

			   SPEAR1340_PCIE_SATA_CFG_MASK,

			   SPEAR1340_SATA_CFG_VAL);

	regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,

			   SPEAR1340_PCIE_MIPHY_CFG_MASK,

			   SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK);

	/* Switch on sata power domain */

	regmap_update_bits(priv->misc, SPEAR1340_PCM_CFG,

			   SPEAR1340_PCM_CFG_SATA_POWER_EN,

			   SPEAR1340_PCM_CFG_SATA_POWER_EN);

	/* Wait for SATA power domain on */

	msleep(20);



	/* Disable PCIE SATA Controller reset */

	regmap_update_bits(priv->misc, SPEAR1340_PERIP1_SW_RST,

			   SPEAR1340_PERIP1_SW_RSATA, 0);

	/* Wait for SATA reset de-assert completion */

	msleep(20);



	return 0;

}



static int spear1340_miphy_sata_exit(struct spear1340_miphy_priv *priv)

{

	regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,

			   SPEAR1340_PCIE_SATA_CFG_MASK, 0);

	regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,

			   SPEAR1340_PCIE_MIPHY_CFG_MASK, 0);



	/* Enable PCIE SATA Controller reset */

	regmap_update_bits(priv->misc, SPEAR1340_PERIP1_SW_RST,

			   SPEAR1340_PERIP1_SW_RSATA,

			   SPEAR1340_PERIP1_SW_RSATA);

	/* Wait for SATA power domain off */

	msleep(20);

	/* Switch off sata power domain */

	regmap_update_bits(priv->misc, SPEAR1340_PCM_CFG,

			   SPEAR1340_PCM_CFG_SATA_POWER_EN, 0);

	/* Wait for SATA reset assert completion */

	msleep(20);



	return 0;

}



static int spear1340_miphy_pcie_init(struct spear1340_miphy_priv *priv)

{

	regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,

			   SPEAR1340_PCIE_MIPHY_CFG_MASK,

			   SPEAR1340_PCIE_SATA_MIPHY_CFG_PCIE);

	regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,

			   SPEAR1340_PCIE_SATA_CFG_MASK,

			   SPEAR1340_PCIE_CFG_VAL);



	return 0;

}



static int spear1340_miphy_pcie_exit(struct spear1340_miphy_priv *priv)

{

	regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,

			   SPEAR1340_PCIE_MIPHY_CFG_MASK, 0);

	regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,

			   SPEAR1340_PCIE_SATA_CFG_MASK, 0);



	return 0;

}



static int spear1340_miphy_init(struct phy *phy)

{

	struct spear1340_miphy_priv *priv = phy_get_drvdata(phy);

	int ret = 0;



	if (priv->mode == SATA)

		ret = spear1340_miphy_sata_init(priv);

	else if (priv->mode == PCIE)

		ret = spear1340_miphy_pcie_init(priv);



	return ret;

}



static int spear1340_miphy_exit(struct phy *phy)

{

	struct spear1340_miphy_priv *priv = phy_get_drvdata(phy);

	int ret = 0;



	if (priv->mode == SATA)

		ret = spear1340_miphy_sata_exit(priv);

	else if (priv->mode == PCIE)

		ret = spear1340_miphy_pcie_exit(priv);



	return ret;

}



static const struct of_device_id spear1340_miphy_of_match[] = {

	{ .compatible = "st,spear1340-miphy" },

	{ },

};

MODULE_DEVICE_TABLE(of, spear1340_miphy_of_match);



static struct phy_ops spear1340_miphy_ops = {

	.init = spear1340_miphy_init,

	.exit = spear1340_miphy_exit,

	.owner = THIS_MODULE,

};



#ifdef CONFIG_PM_SLEEP

static int spear1340_miphy_suspend(struct device *dev)

{

	struct spear1340_miphy_priv *priv = dev_get_drvdata(dev);

	int ret = 0;



	if (priv->mode == SATA)

		ret = spear1340_miphy_sata_exit(priv);



	return ret;

}



static int spear1340_miphy_resume(struct device *dev)

{

	struct spear1340_miphy_priv *priv = dev_get_drvdata(dev);

	int ret = 0;



	if (priv->mode == SATA)

		ret = spear1340_miphy_sata_init(priv);



	return ret;

}

#endif



static SIMPLE_DEV_PM_OPS(spear1340_miphy_pm_ops, spear1340_miphy_suspend,

			 spear1340_miphy_resume);



static struct phy *spear1340_miphy_xlate(struct device *dev,

					 struct of_phandle_args *args)

{

	struct spear1340_miphy_priv *priv = dev_get_drvdata(dev);



	if (args->args_count < 1) {

		dev_err(dev, "DT did not pass correct no of args\n");

		return NULL;

	}



	priv->mode = args->args[0];



	if (priv->mode != SATA && priv->mode != PCIE) {

		dev_err(dev, "DT did not pass correct phy mode\n");

		return NULL;

	}



	return priv->phy;

}



static int spear1340_miphy_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct spear1340_miphy_priv *priv;

	struct phy_provider *phy_provider;



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

	if (!priv) {

		dev_err(dev, "can't alloc spear1340_miphy private date memory\n");

		return -ENOMEM;

	}



	priv->misc =

		syscon_regmap_lookup_by_phandle(dev->of_node, "misc");

	if (IS_ERR(priv->misc)) {

		dev_err(dev, "failed to find misc regmap\n");

		return PTR_ERR(priv->misc);

	}



	priv->phy = devm_phy_create(dev, &spear1340_miphy_ops, NULL);

	if (IS_ERR(priv->phy)) {

		dev_err(dev, "failed to create SATA PCIe PHY\n");

		return PTR_ERR(priv->phy);

	}



	dev_set_drvdata(dev, priv);

	phy_set_drvdata(priv->phy, priv);



	phy_provider =

		devm_of_phy_provider_register(dev, spear1340_miphy_xlate);

	if (IS_ERR(phy_provider)) {

		dev_err(dev, "failed to register phy provider\n");

		return PTR_ERR(phy_provider);

	}



	return 0;

}



static struct platform_driver spear1340_miphy_driver = {

	.probe		= spear1340_miphy_probe,

	.driver = {

		.name = "spear1340-miphy",

		.owner = THIS_MODULE,

		.pm = &spear1340_miphy_pm_ops,

		.of_match_table = of_match_ptr(spear1340_miphy_of_match),

	},

};



static int __init spear1340_miphy_phy_init(void)

{

	return platform_driver_register(&spear1340_miphy_driver);

}

module_init(spear1340_miphy_phy_init);



static void __exit spear1340_miphy_phy_exit(void)

{

	platform_driver_unregister(&spear1340_miphy_driver);

}

module_exit(spear1340_miphy_phy_exit);



MODULE_DESCRIPTION("ST SPEAR1340-MIPHY driver");

MODULE_AUTHOR("Pratyush Anand <pratyush.anand@st.com>");

MODULE_LICENSE("GPL v2");

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