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SubjectRe: [RFC] [PATCH] phy: Add new Exynos USB PHY driver
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On Fri, Sep 20, 2013 at 5:11 PM, Vivek Gautam <gautamvivek1987@gmail.com> wrote:
> On Wed, Sep 11, 2013 at 4:57 PM, Kamil Debski <k.debski@samsung.com> wrote:
>> Add a new driver for the Exynos USB PHY. The new driver uses the generic
>> PHY framework.
>>
>> Signed-off-by: Kamil Debski <k.debski@samsung.com>
>> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
>> Cc: Kishon Vijay Abraham I <kishon@ti.com>
>> Cc: Tomasz Figa <t.figa@samsung.com>
>> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
>> Cc: Marek Szyprowski <m.szyprowski@samsung.com>
>> ---
>>
>> Hi,
>>
>> This patch adds a new drive for USB PHYs for Samsung SoCs. The driver is using
>> the Generic PHY Framework created by Kishon Vijay Abrahan I. It can be found
>> here https://lkml.org/lkml/2013/8/21/29.
>> This patch adds support to Exynos4 family of SoCs. Support for Exynos3 and
>> Exynos5 is planned to be added in the near future.
>>
>> I welcome your comments.
>
> How do you plan to put support for exynos5 series. I can see you have
> made separate files for exynos4210 and 4212.
> Now for exynos5250 and above, we should be able to re-use some of the
> functions like "4212_rate_to_clk()" and "4212_iso()".
>
> Let me know if i can help with something for exynos5 stuff.
>

Also please add linux-usb and linux-samsung mailing list too.

> [...]
>
>>
>> Best wishes,
>> Kamil Debski
>>
>> ---
>> .../devicetree/bindings/phy/samsung-usbphy.txt | 48 +++
>> drivers/phy/Kconfig | 23 ++
>> drivers/phy/Makefile | 3 +
>> drivers/phy/phy-exynos-usb.c | 245 ++++++++++++++
>> drivers/phy/phy-exynos-usb.h | 95 ++++++
>> drivers/phy/phy-exynos4210-usb.c | 315 ++++++++++++++++++
>> drivers/phy/phy-exynos4212-usb.c | 349 ++++++++++++++++++++
>> 7 files changed, 1078 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/phy/samsung-usbphy.txt
>> create mode 100644 drivers/phy/phy-exynos-usb.c
>> create mode 100644 drivers/phy/phy-exynos-usb.h
>> create mode 100644 drivers/phy/phy-exynos4210-usb.c
>> create mode 100644 drivers/phy/phy-exynos4212-usb.c
>>
>> diff --git a/Documentation/devicetree/bindings/phy/samsung-usbphy.txt b/Documentation/devicetree/bindings/phy/samsung-usbphy.txt
>> new file mode 100644
>> index 0000000..f618e8d
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/phy/samsung-usbphy.txt
>> @@ -0,0 +1,48 @@
>> +Samsung S5P/EXYNOS SoC series USB PHY
>> +-------------------------------------------------
>> +
>> +Required properties:
>> +- compatible : should be one of the listed compatibles:
>> + - "samsung,exynos4210-usbphy"
>> + - "samsung,exynos4212-usbphy"
>> +- reg : a list of registers used by phy driver
>> + - first and obligatory is the location of phy modules registers
>> + - second and also required is the location of isolation registers
>> + (isolation registers control the physical connection between the in
>> + SoC modules and outside of the SoC, this also can be called enable
>> + control in the documentation of the SoC)
>> + - third is the location of the mode switch register, this only applies
>> + to SoCs that have such a feature; mode switching enables to have
>> + both host and device used the same SoC pins and is commonly used
>> + when OTG is supported
>> +- #phy-cells : from the generic phy bindings, must be 1;
>> +
>> +The second cell in the PHY specifier identifies the PHY its meaning is SoC
>> +dependent. For the currently supported SoCs (Exynos 4210 and Exynos 4212) it
>> +is as follows:
>> + 0 - USB device,
>> + 1 - USB host,
>> + 2 - HSIC0,
>> + 3 - HSIC1,
>> +
>> +Example:
>> +
>> +For Exynos 4412 (compatible with Exynos 4212):
>> +
>> +exynos_usbphy: exynos-usbphy@125B0000 {
>> + compatible = "samsung,exynos4212-usbphy";
>> + reg = <0x125B0000 0x100>, <0x10020704 0x0c>, <0x1001021c 0x4>;
>> + clocks = <&clock 305>, <&clock 2>, <&clock 2>, <&clock 2>,
>> + <&clock 2>;
>> + clock-names = "phy", "device", "host", "hsic0", "hsic1";
>> + status = "okay";
>> + #phy-cells = <1>;
>> +};
>> +
>> +Then the PHY can be used in other nodes such as:
>> +
>> +ehci@12580000 {
>> + status = "okay";
>> + phys = <&exynos_usbphy 2>;
>> + phy-names = "hsic0";
>> +};
>> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
>> index 108c5f6..af3c422 100644
>> --- a/drivers/phy/Kconfig
>> +++ b/drivers/phy/Kconfig
>> @@ -21,4 +21,27 @@ config PHY_EXYNOS_MIPI_VIDEO
>> Support for MIPI CSI-2 and MIPI DSI DPHY found on Samsung
>> S5P and EXYNOS SoCs.
>>
>> +config PHY_EXYNOS_USB
>> + tristate "Samsung USB PHY driver (using the Generic PHY Framework)"
>> + help
>> + Samsung USB PHY driver
>> +
>> + Enable this to support Samsung USB phy helper driver for Samsung SoCs.
>> + This driver provides common interface to interact, for Samsung
>> + USB 2.0 PHY driver.
>> +
>> +config PHY_EXYNOS4210_USB
>> + bool "Support for Exynos 4210"
>> + depends on PHY_EXYNOS_USB
>> + depends on CPU_EXYNOS4210
>> + help
>> + Enable USB PHY support for Exynos 4210
>> +
>> +config PHY_EXYNOS4212_USB
>> + bool "Support for Exynos 4212"
>> + depends on PHY_EXYNOS_USB
>> + depends on (SOC_EXYNOS4212 || SOC_EXYNOS4412)
>> + help
>> + Enable USB PHY support for Exynos 4212
>> +
>> endmenu
>> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
>> index 71d8841..d75f932 100644
>> --- a/drivers/phy/Makefile
>> +++ b/drivers/phy/Makefile
>> @@ -4,3 +4,6 @@
>>
>> obj-$(CONFIG_GENERIC_PHY) += phy-core.o
>> obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o
>> +obj-$(CONFIG_PHY_EXYNOS_USB) += phy-exynos-usb.o
>> +obj-$(CONFIG_PHY_EXYNOS4210_USB) += phy-exynos4210-usb.o
>> +obj-$(CONFIG_PHY_EXYNOS4212_USB) += phy-exynos4212-usb.o
>> diff --git a/drivers/phy/phy-exynos-usb.c b/drivers/phy/phy-exynos-usb.c
>> new file mode 100644
>> index 0000000..b15a19f
>> --- /dev/null
>> +++ b/drivers/phy/phy-exynos-usb.c
>> @@ -0,0 +1,245 @@
>> +/*
>> + * Samsung S5P/EXYNOS SoC series USB PHY driver
>> + *
>> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
>> + * Author: Kamil Debski <k.debski@samsung.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/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/io.h>
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_address.h>
>> +#include <linux/phy/phy.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/spinlock.h>
>> +#include "phy-exynos-usb.h"
>> +
>> +static int exynos_uphy_power_on(struct phy *phy)
>> +{
>> + struct uphy_instance *inst = phy_get_drvdata(phy);
>> + struct uphy_driver *drv = inst->drv;
>> + int ret;
>> +
>> + dev_info(drv->dev, "Request to power_on \"%s\" usb phy\n",
>> + inst->cfg->label);
>> + ret = clk_prepare_enable(drv->clk);
>> + if (ret)
>> + return ret;
>> + if (inst->cfg->power_on) {
>> + spin_lock(&drv->lock);
>> + ret = inst->cfg->power_on(inst);
>> + spin_unlock(&drv->lock);
>> + }
>> + clk_disable_unprepare(drv->clk);
>> + return ret;
>> +}
>> +
>> +static int exynos_uphy_power_off(struct phy *phy)
>> +{
>> + struct uphy_instance *inst = phy_get_drvdata(phy);
>> + struct uphy_driver *drv = inst->drv;
>> + int ret;
>> +
>> + dev_info(drv->dev, "Request to power_off \"%s\" usb phy\n",
>> + inst->cfg->label);
>> + ret = clk_prepare_enable(drv->clk);
>> + if (ret)
>> + return ret;
>> + if (inst->cfg->power_off) {
>> + spin_lock(&drv->lock);
>> + ret = inst->cfg->power_off(inst);
>> + spin_unlock(&drv->lock);
>> + }
>> + clk_disable_unprepare(drv->clk);
>> + return ret;
>> +}
>> +
>> +static struct phy_ops exynos_uphy_ops = {
>> + .power_on = exynos_uphy_power_on,
>> + .power_off = exynos_uphy_power_off,
>> + .owner = THIS_MODULE,
>> +};
>> +
>> +static struct phy *exynos_uphy_xlate(struct device *dev,
>> + struct of_phandle_args *args)
>> +{
>> + struct uphy_driver *drv;
>> +
>> + drv = dev_get_drvdata(dev);
>> + if (!drv)
>> + return ERR_PTR(-EINVAL);
>> +
>> + if (WARN_ON(args->args[0] >= drv->cfg->num_phys))
>> + return ERR_PTR(-ENODEV);
>> +
>> + return drv->uphy_instances[args->args[0]].phy;
>> +}
>> +
>> +static const struct of_device_id exynos_uphy_of_match[];
>> +
>> +static int exynos_uphy_probe(struct platform_device *pdev)
>> +{
>> + struct uphy_driver *drv;
>> + struct device *dev = &pdev->dev;
>> + struct resource *mem;
>> + struct phy_provider *phy_provider;
>> +
>> + const struct of_device_id *match;
>> + const struct uphy_config *cfg;
>> + struct clk *clk;
>> +
>> + int i;
>> +
>> + match = of_match_node(exynos_uphy_of_match, pdev->dev.of_node);
>> + if (!match) {
>> + dev_err(dev, "of_match_node() failed\n");
>> + return -EINVAL;
>> + }
>> + cfg = match->data;
>> + if (!cfg) {
>> + dev_err(dev, "Failed to get configuration\n");
>> + return -EINVAL;
>> + }
>> +
>> + drv = devm_kzalloc(dev, sizeof(struct uphy_driver) +
>> + cfg->num_phys * sizeof(struct uphy_instance), GFP_KERNEL);
>> +
>> + if (!drv) {
>> + dev_err(dev, "Failed to allocate memory\n");
>> + return -ENOMEM;
>> + }
>> +
>> + dev_set_drvdata(dev, drv);
>> + spin_lock_init(&drv->lock);
>> +
>> + drv->cfg = cfg;
>> + drv->dev = dev;
>> +
>> + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> +
>> + drv->reg_phy = devm_ioremap_resource(dev, mem);
>> + if (IS_ERR(drv->reg_phy)) {
>> + dev_err(dev, "Failed to map register memory (phy)\n");
>> + return PTR_ERR(drv->reg_phy);
>> + }
>> +
>> + mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
>> + drv->reg_isol = devm_ioremap_resource(dev, mem);
>> + if (IS_ERR(drv->reg_isol)) {
>> + dev_err(dev, "Failed to map register memory (isolation)\n");
>> + return PTR_ERR(drv->reg_isol);
>> + }
>> +
>> + switch (drv->cfg->cpu) {
>> + case TYPE_EXYNOS4210:
>> + case TYPE_EXYNOS4212:
>> + mem = platform_get_resource(pdev, IORESOURCE_MEM, 2);
>> + drv->reg_mode = devm_ioremap_resource(dev, mem);
>> + if (IS_ERR(drv->reg_mode)) {
>> + dev_err(dev, "Failed to map register memory (mode switch)\n");
>> + return PTR_ERR(drv->reg_mode);
>> + }
>> + break;
>> + default:
>> + break;
>> + }
>> +
>> + phy_provider = devm_of_phy_provider_register(dev,
>> + exynos_uphy_xlate);
>> + if (IS_ERR(phy_provider)) {
>> + dev_err(drv->dev, "Failed to register phy provider\n");
>> + return PTR_ERR(phy_provider);
>> + }
>> +
>> + drv->clk = devm_clk_get(dev, "phy");
>> + if (IS_ERR(drv->clk)) {
>> + dev_err(dev, "Failed to get clock of phy controller\n");
>> + return PTR_ERR(drv->clk);
>> + }
>> +
>> + for (i = 0; i < drv->cfg->num_phys; i++) {
>> + char *label = drv->cfg->phys[i].label;
>> + struct uphy_instance *p = &drv->uphy_instances[i];
>> +
>> + dev_info(dev, "Creating phy \"%s\"\n", label);
>> + p->phy = devm_phy_create(dev, &exynos_uphy_ops, NULL);
>> + if (IS_ERR(p->phy)) {
>> + dev_err(drv->dev, "Failed to create uphy \"%s\"\n",
>> + label);
>> + return PTR_ERR(p->phy);
>> + }
>> +
>> + p->cfg = &drv->cfg->phys[i];
>> + p->drv = drv;
>> + phy_set_drvdata(p->phy, p);
>> +
>> + clk = clk_get(dev, p->cfg->label);
>> + if (IS_ERR(clk)) {
>> + dev_err(dev, "Failed to get clock of \"%s\" phy\n",
>> + p->cfg->label);
>> + return PTR_ERR(drv->clk);
>> + }
>> +
>> + p->rate = clk_get_rate(clk);
>> +
>> + if (p->cfg->rate_to_clk) {
>> + p->clk = p->cfg->rate_to_clk(p->rate);
>> + if (p->clk == CLKSEL_ERROR) {
>> + dev_err(dev, "Clock rate (%ld) not supported\n",
>> + p->rate);
>> + clk_put(clk);
>> + return -EINVAL;
>> + }
>> + }
>> + clk_put(clk);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +#ifdef CONFIG_PHY_EXYNOS4210_USB
>> +extern const struct uphy_config exynos4210_uphy_config;
>> +#endif
>> +
>> +#ifdef CONFIG_PHY_EXYNOS4212_USB
>> +extern const struct uphy_config exynos4212_uphy_config;
>> +#endif
>> +
>> +static const struct of_device_id exynos_uphy_of_match[] = {
>> +#ifdef CONFIG_PHY_EXYNOS4210_USB
>> + {
>> + .compatible = "samsung,exynos4210-usbphy",
>> + .data = &exynos4210_uphy_config,
>> + },
>> +#endif
>> +#ifdef CONFIG_PHY_EXYNOS4212_USB
>> + {
>> + .compatible = "samsung,exynos4212-usbphy",
>> + .data = &exynos4212_uphy_config,
>> + },
>> +#endif
>> + { },
>> +};
>> +
>> +static struct platform_driver exynos_uphy_driver = {
>> + .probe = exynos_uphy_probe,
>> + .driver = {
>> + .of_match_table = exynos_uphy_of_match,
>> + .name = "exynos-usbphy-new",
>> + .owner = THIS_MODULE,
>> + }
>> +};
>> +
>> +module_platform_driver(exynos_uphy_driver);
>> +MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC USB PHY driver");
>> +MODULE_AUTHOR("Kamil Debski <k.debski@samsung.com>");
>> +MODULE_LICENSE("GPL v2");
>> +MODULE_ALIAS("platform:exynos-uphy-new");
>> +
>> diff --git a/drivers/phy/phy-exynos-usb.h b/drivers/phy/phy-exynos-usb.h
>> new file mode 100644
>> index 0000000..597a02e
>> --- /dev/null
>> +++ b/drivers/phy/phy-exynos-usb.h
>> @@ -0,0 +1,95 @@
>> +/*
>> + * Samsung S5P/EXYNOS SoC series USB PHY driver
>> + *
>> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
>> + * Author: Kamil Debski <k.debski@samsung.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.
>> + */
>> +
>> +#ifndef _PHY_SAMSUNG_NEW_H
>> +#define _PHY_SAMSUNG_NEW_H
>> +
>> +#include <linux/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/io.h>
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_address.h>
>> +#include <linux/phy/phy.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/spinlock.h>
>> +
>> +#define CLKSEL_ERROR -1
>> +
>> +#ifndef KHZ
>> +#define KHZ 1000
>> +#endif
>> +
>> +#ifndef MHZ
>> +#define MHZ (KHZ * KHZ)
>> +#endif
>> +
>> +enum phy_type {
>> + PHY_DEVICE,
>> + PHY_HOST,
>> +};
>> +
>> +enum samsung_cpu_type {
>> + TYPE_S3C64XX,
>> + TYPE_EXYNOS4210,
>> + TYPE_EXYNOS4212,
>> + TYPE_EXYNOS5250,
>> +};
>> +
>> +enum uphy_state {
>> + STATE_OFF,
>> + STATE_ON,
>> +};
>> +
>> +struct uphy_driver;
>> +struct uphy_instance;
>> +struct uphy_config;
>> +
>> +struct uphy_instance {
>> + struct uphy_driver *drv;
>> + struct phy *phy;
>> + const struct common_phy *cfg;
>> + enum uphy_state state;
>> + int ref_cnt;
>> + u32 clk;
>> + unsigned long rate;
>> +};
>> +
>> +struct uphy_driver {
>> + struct device *dev;
>> + spinlock_t lock;
>> + void __iomem *reg_phy;
>> + void __iomem *reg_isol;
>> + void __iomem *reg_mode;
>> + const struct uphy_config *cfg;
>> + struct clk *clk;
>> + struct uphy_instance uphy_instances[0];
>> +};
>> +
>> +struct common_phy {
>> + char *label;
>> + enum phy_type type;
>> + unsigned int id;
>> + u32 (*rate_to_clk)(unsigned long);
>> + int (*power_on)(struct uphy_instance *);
>> + int (*power_off)(struct uphy_instance *);
>> +};
>> +
>> +
>> +struct uphy_config {
>> + enum samsung_cpu_type cpu;
>> + int num_phys;
>> + const struct common_phy *phys;
>> +};
>> +
>> +#endif
>> +
>> diff --git a/drivers/phy/phy-exynos4210-usb.c b/drivers/phy/phy-exynos4210-usb.c
>> new file mode 100644
>> index 0000000..4b849e7
>> --- /dev/null
>> +++ b/drivers/phy/phy-exynos4210-usb.c
>> @@ -0,0 +1,315 @@
>> +/*
>> + * Samsung S5P/EXYNOS SoC series USB PHY driver
>> + *
>> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
>> + * Author: Kamil Debski <k.debski@samsung.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/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/io.h>
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_address.h>
>> +#include <linux/phy/phy.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/spinlock.h>
>> +#include "phy-exynos-usb.h"
>> +
>> +/* Exynos USB PHY registers */
>> +
>> +/* PHY power control */
>> +#define EXYNOS_4210_UPHYPWR 0x0
>> +
>> +#define EXYNOS_4210_UPHYPWR_PHY0_SUSPEND (1 << 0)
>> +#define EXYNOS_4210_UPHYPWR_PHY0_PWR (1 << 3)
>> +#define EXYNOS_4210_UPHYPWR_PHY0_OTG_PWR (1 << 4)
>> +#define EXYNOS_4210_UPHYPWR_PHY0_SLEEP (1 << 5)
>> +#define EXYNOS_4210_UPHYPWR_PHY0 ( \
>> + EXYNOS_4210_UPHYPWR_PHY0_SUSPEND | \
>> + EXYNOS_4210_UPHYPWR_PHY0_PWR | \
>> + EXYNOS_4210_UPHYPWR_PHY0_OTG_PWR | \
>> + EXYNOS_4210_UPHYPWR_PHY0_SLEEP)
>> +
>> +#define EXYNOS_4210_UPHYPWR_PHY1_SUSPEND (1 << 6)
>> +#define EXYNOS_4210_UPHYPWR_PHY1_PWR (1 << 7)
>> +#define EXYNOS_4210_UPHYPWR_PHY1_SLEEP (1 << 8)
>> +#define EXYNOS_4210_UPHYPWR_PHY1 ( \
>> + EXYNOS_4210_UPHYPWR_PHY1_SUSPEND | \
>> + EXYNOS_4210_UPHYPWR_PHY1_PWR | \
>> + EXYNOS_4210_UPHYPWR_PHY1_SLEEP)
>> +
>> +#define EXYNOS_4210_UPHYPWR_HSCI0_SUSPEND (1 << 9)
>> +#define EXYNOS_4210_UPHYPWR_HSCI0_SLEEP (1 << 10)
>> +#define EXYNOS_4210_UPHYPWR_HSCI0 ( \
>> + EXYNOS_4210_UPHYPWR_HSCI0_SUSPEND | \
>> + EXYNOS_4210_UPHYPWR_HSCI0_SLEEP)
>> +
>> +#define EXYNOS_4210_UPHYPWR_HSCI1_SUSPEND (1 << 11)
>> +#define EXYNOS_4210_UPHYPWR_HSCI1_SLEEP (1 << 12)
>> +#define EXYNOS_4210_UPHYPWR_HSCI1 ( \
>> + EXYNOS_4210_UPHYPWR_HSCI1_SUSPEND | \
>> + EXYNOS_4210_UPHYPWR_HSCI1_SLEEP)
>> +
>> +/* PHY clock control */
>> +#define EXYNOS_4210_UPHYCLK 0x4
>> +
>> +#define EXYNOS_4210_UPHYCLK_PHYFSEL_MASK (0x3 << 0)
>> +#define EXYNOS_4210_UPHYCLK_PHYFSEL_48MHZ (0x0 << 0)
>> +#define EXYNOS_4210_UPHYCLK_PHYFSEL_24MHZ (0x3 << 0)
>> +#define EXYNOS_4210_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0)
>> +
>> +#define EXYNOS_4210_UPHYCLK_PHY0_ID_PULLUP (0x1 << 2)
>> +#define EXYNOS_4210_UPHYCLK_PHY0_COMMON_ON (0x1 << 4)
>> +#define EXYNOS_4210_UPHYCLK_PHY1_COMMON_ON (0x1 << 7)
>> +
>> +/* PHY reset control */
>> +#define EXYNOS_4210_UPHYRST 0x8
>> +
>> +#define EXYNOS_4210_URSTCON_PHY0 (1 << 0)
>> +#define EXYNOS_4210_URSTCON_OTG_HLINK (1 << 1)
>> +#define EXYNOS_4210_URSTCON_OTG_PHYLINK (1 << 2)
>> +#define EXYNOS_4210_URSTCON_PHY1_ALL (1 << 3)
>> +#define EXYNOS_4210_URSTCON_PHY1_P0 (1 << 4)
>> +#define EXYNOS_4210_URSTCON_PHY1_P1P2 (1 << 5)
>> +#define EXYNOS_4210_URSTCON_HOST_LINK_ALL (1 << 6)
>> +#define EXYNOS_4210_URSTCON_HOST_LINK_P0 (1 << 7)
>> +#define EXYNOS_4210_URSTCON_HOST_LINK_P1 (1 << 8)
>> +#define EXYNOS_4210_URSTCON_HOST_LINK_P2 (1 << 9)
>> +
>> +/* Isolation, configured in the power management unit */
>> +#define EXYNOS_4210_USB_ISOL_DEVICE_OFFSET 0x0
>> +#define EXYNOS_4210_USB_ISOL_DEVICE (1 << 0)
>> +#define EXYNOS_4210_USB_ISOL_HOST_OFFSET 0x4
>> +#define EXYNOS_4210_USB_ISOL_HOST (1 << 0)
>> +
>> +/* USBYPHY1 Floating prevention */
>> +#define EXYNOS_4210_UPHY1CON 0x34
>> +#define EXYNOS_4210_UPHY1CON_FLOAT_PREVENTION 0x1
>> +
>> +enum exynos4210_phy_id {
>> + EXYNOS4210_DEVICE,
>> + EXYNOS4210_HOST,
>> + EXYNOS4210_HSIC0,
>> + EXYNOS4210_HSIC1,
>> + EXYNOS4210_NUM_PHYS,
>> +};
>> +
>> +/* exynos4210_rate_to_clk() converts the supplied clock rate to the value that
>> + * can be written to the phy register. */
>> +static u32 exynos4210_rate_to_clk(unsigned long rate)
>> +{
>> + unsigned int clksel;
>> +
>> + switch (rate) {
>> + case 12 * MHZ:
>> + clksel = EXYNOS_4210_UPHYCLK_PHYFSEL_12MHZ;
>> + break;
>> + case 24 * MHZ:
>> + clksel = EXYNOS_4210_UPHYCLK_PHYFSEL_24MHZ;
>> + break;
>> + case 48 * MHZ:
>> + clksel = EXYNOS_4210_UPHYCLK_PHYFSEL_48MHZ;
>> + break;
>> + default:
>> + clksel = CLKSEL_ERROR;
>> + }
>> +
>> + return clksel;
>> +}
>> +
>> +static void exynos4210_isol(struct uphy_instance *inst, bool on)
>> +{
>> + struct uphy_driver *drv = inst->drv;
>> + u32 offset;
>> + u32 mask;
>> + u32 tmp;
>> +
>> + if (!drv->reg_isol)
>> + return;
>> +
>> + switch (inst->cfg->id) {
>> + case EXYNOS4210_DEVICE:
>> + offset = EXYNOS_4210_USB_ISOL_DEVICE_OFFSET;
>> + mask = EXYNOS_4210_USB_ISOL_DEVICE;
>> + break;
>> + case EXYNOS4210_HOST:
>> + offset = EXYNOS_4210_USB_ISOL_HOST_OFFSET;
>> + mask = EXYNOS_4210_USB_ISOL_HOST;
>> + break;
>> + default:
>> + return;
>> + };
>> +
>> + tmp = readl(drv->reg_isol + offset);
>> + if (on)
>> + tmp &= ~mask;
>> + else
>> + tmp |= mask;
>> + writel(tmp, drv->reg_isol + offset);
>> +}
>> +
>> +static void exynos4210_phy_pwr(struct uphy_instance *inst, bool on)
>> +{
>> + struct uphy_driver *drv = inst->drv;
>> + u32 rstbits = 0;
>> + u32 phypwr = 0;
>> + u32 rst;
>> + u32 pwr;
>> +
>> + switch (inst->cfg->id) {
>> + case EXYNOS4210_DEVICE:
>> + phypwr = EXYNOS_4210_UPHYPWR_PHY0;
>> + rstbits = EXYNOS_4210_URSTCON_PHY0;
>> + break;
>> + case EXYNOS4210_HOST:
>> + phypwr = EXYNOS_4210_UPHYPWR_PHY1;
>> + rstbits = EXYNOS_4210_URSTCON_PHY1_ALL |
>> + EXYNOS_4210_URSTCON_PHY1_P0 |
>> + EXYNOS_4210_URSTCON_PHY1_P1P2 |
>> + EXYNOS_4210_URSTCON_HOST_LINK_ALL |
>> + EXYNOS_4210_URSTCON_HOST_LINK_P0;
>> + writel(on, drv->reg_phy + EXYNOS_4210_UPHY1CON);
>> + break;
>> + case EXYNOS4210_HSIC0:
>> + phypwr = EXYNOS_4210_UPHYPWR_HSCI0;
>> + rstbits = EXYNOS_4210_URSTCON_PHY1_P1P2 |
>> + EXYNOS_4210_URSTCON_HOST_LINK_P1;
>> + break;
>> + case EXYNOS4210_HSIC1:
>> + phypwr = EXYNOS_4210_UPHYPWR_HSCI1;
>> + rstbits = EXYNOS_4210_URSTCON_PHY1_P1P2 |
>> + EXYNOS_4210_URSTCON_HOST_LINK_P2;
>> + break;
>> + };
>> +
>> + if (on) {
>> + writel(inst->clk, drv->reg_phy + EXYNOS_4210_UPHYCLK);
>> +
>> + pwr = readl(drv->reg_phy + EXYNOS_4210_UPHYPWR);
>> + pwr &= ~phypwr;
>> + writel(pwr, drv->reg_phy + EXYNOS_4210_UPHYPWR);
>> +
>> + rst = readl(drv->reg_phy + EXYNOS_4210_UPHYRST);
>> + rst |= rstbits;
>> + writel(rst, drv->reg_phy + EXYNOS_4210_UPHYRST);
>> + udelay(10);
>> + rst &= ~rstbits;
>> + writel(rst, drv->reg_phy + EXYNOS_4210_UPHYRST);
>> + } else {
>> + pwr = readl(drv->reg_phy + EXYNOS_4210_UPHYPWR);
>> + pwr |= phypwr;
>> + writel(pwr, drv->reg_phy + EXYNOS_4210_UPHYPWR);
>> + }
>> +}
>> +
>> +static int exynos4210_power_on(struct uphy_instance *inst)
>> +{
>> + struct uphy_driver *drv = inst->drv;
>> +
>> + if (inst->state == STATE_ON) {
>> + dev_err(drv->dev, "usb phy \"%s\" already on",
>> + inst->cfg->label);
>> + return -ENODEV;
>> + }
>> + inst->state = STATE_ON;
>> + inst->ref_cnt++;
>> + if (inst->ref_cnt > 1)
>> + return 0;
>> +
>> + exynos4210_isol(inst, 0);
>> + exynos4210_phy_pwr(inst, 1);
>> +
>> + /* Power on the device, as it is necessary for HSIC to work */
>> + if (inst->cfg->id == EXYNOS4210_HOST) {
>> + struct uphy_instance *device =
>> + &drv->uphy_instances[EXYNOS4210_DEVICE];
>> + device->ref_cnt++;
>> + if (device->ref_cnt > 1)
>> + return 0;
>> + exynos4210_phy_pwr(device, 1);
>> + exynos4210_isol(device, 0);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int exynos4210_power_off(struct uphy_instance *inst)
>> +{
>> + struct uphy_driver *drv = inst->drv;
>> +
>> + if (inst->state == STATE_OFF) {
>> + dev_err(drv->dev, "usb phy \"%s\" already off",
>> + inst->cfg->label);
>> + return -EINVAL;
>> + }
>> +
>> + inst->state = STATE_OFF;
>> + inst->ref_cnt++;
>> + if (inst->ref_cnt > 0)
>> + return 0;
>> +
>> + exynos4210_phy_pwr(inst, 0);
>> + exynos4210_isol(inst, 1);
>> +
>> + if (inst->cfg->id == EXYNOS4210_HOST) {
>> + struct uphy_instance *device =
>> + &drv->uphy_instances[EXYNOS4210_DEVICE];
>> + device->ref_cnt--;
>> + if (device->ref_cnt > 0)
>> + return 0;
>> + exynos4210_phy_pwr(device, 0);
>> + exynos4210_isol(device, 1);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +
>> +static const struct common_phy exynos4210_phys[] = {
>> + {
>> + .label = "device",
>> + .type = PHY_DEVICE,
>> + .id = EXYNOS4210_DEVICE,
>> + .rate_to_clk = exynos4210_rate_to_clk,
>> + .power_on = exynos4210_power_on,
>> + .power_off = exynos4210_power_off,
>> + },
>> + {
>> + .label = "host",
>> + .type = PHY_HOST,
>> + .id = EXYNOS4210_HOST,
>> + .rate_to_clk = exynos4210_rate_to_clk,
>> + .power_on = exynos4210_power_on,
>> + .power_off = exynos4210_power_off,
>> + },
>> + {
>> + .label = "hsic0",
>> + .type = PHY_HOST,
>> + .id = EXYNOS4210_HSIC0,
>> + .rate_to_clk = exynos4210_rate_to_clk,
>> + .power_on = exynos4210_power_on,
>> + .power_off = exynos4210_power_off,
>> + },
>> + {
>> + .label = "hsic1",
>> + .type = PHY_HOST,
>> + .id = EXYNOS4210_HSIC1,
>> + .rate_to_clk = exynos4210_rate_to_clk,
>> + .power_on = exynos4210_power_on,
>> + .power_off = exynos4210_power_off,
>> + },
>> + {},
>> +};
>> +
>> +const struct uphy_config exynos4210_uphy_config = {
>> + .cpu = TYPE_EXYNOS4210,
>> + .num_phys = EXYNOS4210_NUM_PHYS,
>> + .phys = exynos4210_phys,
>> +};
>> +
>> diff --git a/drivers/phy/phy-exynos4212-usb.c b/drivers/phy/phy-exynos4212-usb.c
>> new file mode 100644
>> index 0000000..80480a4
>> --- /dev/null
>> +++ b/drivers/phy/phy-exynos4212-usb.c
>> @@ -0,0 +1,349 @@
>> +/*
>> + * Samsung S5P/EXYNOS SoC series USB PHY driver
>> + *
>> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
>> + * Author: Kamil Debski <k.debski@samsung.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/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/io.h>
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_address.h>
>> +#include <linux/phy/phy.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/spinlock.h>
>> +#include "phy-exynos-usb.h"
>> +
>> +/* Exynos USB PHY registers */
>> +
>> +/* PHY power control */
>> +#define EXYNOS_4212_UPHYPWR 0x0
>> +
>> +#define EXYNOS_4212_UPHYPWR_DEV_SUSPEND (1 << 0)
>> +#define EXYNOS_4212_UPHYPWR_DEV_PWR (1 << 3)
>> +#define EXYNOS_4212_UPHYPWR_DEV_OTG_PWR (1 << 4)
>> +#define EXYNOS_4212_UPHYPWR_DEV_SLEEP (1 << 5)
>> +#define EXYNOS_4212_UPHYPWR_DEV ( \
>> + EXYNOS_4212_UPHYPWR_DEV_SUSPEND | \
>> + EXYNOS_4212_UPHYPWR_DEV_PWR | \
>> + EXYNOS_4212_UPHYPWR_DEV_OTG_PWR | \
>> + EXYNOS_4212_UPHYPWR_DEV_SLEEP)
>> +
>> +#define EXYNOS_4212_UPHYPWR_HOST_SUSPEND (1 << 6)
>> +#define EXYNOS_4212_UPHYPWR_HOST_PWR (1 << 7)
>> +#define EXYNOS_4212_UPHYPWR_HOST_SLEEP (1 << 8)
>> +#define EXYNOS_4212_UPHYPWR_HOST ( \
>> + EXYNOS_4212_UPHYPWR_HOST_SUSPEND | \
>> + EXYNOS_4212_UPHYPWR_HOST_PWR | \
>> + EXYNOS_4212_UPHYPWR_HOST_SLEEP)
>> +
>> +#define EXYNOS_4212_UPHYPWR_HSCI0_SUSPEND (1 << 9)
>> +#define EXYNOS_4212_UPHYPWR_HSCI0_PWR (1 << 10)
>> +#define EXYNOS_4212_UPHYPWR_HSCI0_SLEEP (1 << 11)
>> +#define EXYNOS_4212_UPHYPWR_HSCI0 ( \
>> + EXYNOS_4212_UPHYPWR_HSCI0_SUSPEND | \
>> + EXYNOS_4212_UPHYPWR_HSCI0_PWR | \
>> + EXYNOS_4212_UPHYPWR_HSCI0_SLEEP)
>> +
>> +#define EXYNOS_4212_UPHYPWR_HSCI1_SUSPEND (1 << 12)
>> +#define EXYNOS_4212_UPHYPWR_HSCI1_PWR (1 << 13)
>> +#define EXYNOS_4212_UPHYPWR_HSCI1_SLEEP (1 << 14)
>> +#define EXYNOS_4212_UPHYPWR_HSCI1 ( \
>> + EXYNOS_4212_UPHYPWR_HSCI1_SUSPEND | \
>> + EXYNOS_4212_UPHYPWR_HSCI1_PWR | \
>> + EXYNOS_4212_UPHYPWR_HSCI1_SLEEP)
>> +
>> +/* PHY clock control */
>> +#define EXYNOS_4212_UPHYCLK 0x4
>> +
>> +#define EXYNOS_4212_UPHYCLK_PHYFSEL_MASK (0x7 << 0)
>> +#define EXYNOS_4212_UPHYCLK_PHYFSEL_9MHZ6 (0x0 << 0)
>> +#define EXYNOS_4212_UPHYCLK_PHYFSEL_10MHZ (0x1 << 0)
>> +#define EXYNOS_4212_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0)
>> +#define EXYNOS_4212_UPHYCLK_PHYFSEL_19MHZ2 (0x3 << 0)
>> +#define EXYNOS_4212_UPHYCLK_PHYFSEL_20MHZ (0x4 << 0)
>> +#define EXYNOS_4212_UPHYCLK_PHYFSEL_24MHZ (0x5 << 0)
>> +#define EXYNOS_4212_UPHYCLK_PHYFSEL_50MHZ (0x7 << 0)
>> +
>> +#define EXYNOS_4212_UPHYCLK_PHY0_ID_PULLUP (0x1 << 3)
>> +#define EXYNOS_4212_UPHYCLK_PHY0_COMMON_ON (0x1 << 4)
>> +#define EXYNOS_4212_UPHYCLK_PHY1_COMMON_ON (0x1 << 7)
>> +
>> +#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_MASK (0x7f << 10)
>> +#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_12MHZ (0x24 << 10)
>> +#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_15MHZ (0x1c << 10)
>> +#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_16MHZ (0x1a << 10)
>> +#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_19MHZ2 (0x15 << 10)
>> +#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_20MHZ (0x14 << 10)
>> +
>> +/* PHY reset control */
>> +#define EXYNOS_4212_UPHYRST 0x8
>> +
>> +#define EXYNOS_4212_URSTCON_DEVICE (1 << 0)
>> +#define EXYNOS_4212_URSTCON_OTG_HLINK (1 << 1)
>> +#define EXYNOS_4212_URSTCON_OTG_PHYLINK (1 << 2)
>> +#define EXYNOS_4212_URSTCON_HOST_PHY (1 << 3)
>> +#define EXYNOS_4212_URSTCON_PHY1 (1 << 4)
>> +#define EXYNOS_4212_URSTCON_HSIC0 (1 << 5)
>> +#define EXYNOS_4212_URSTCON_HSIC1 (1 << 6)
>> +#define EXYNOS_4212_URSTCON_HOST_LINK_ALL (1 << 7)
>> +#define EXYNOS_4212_URSTCON_HOST_LINK_P0 (1 << 8)
>> +#define EXYNOS_4212_URSTCON_HOST_LINK_P1 (1 << 9)
>> +#define EXYNOS_4212_URSTCON_HOST_LINK_P2 (1 << 10)
>> +
>> +/* Isolation, configured in the power management unit */
>> +#define EXYNOS_4212_USB_ISOL_OFFSET 0x0
>> +#define EXYNOS_4212_USB_ISOL_OTG (1 << 0)
>> +#define EXYNOS_4212_USB_ISOL_HSIC0_OFFSET 0x4
>> +#define EXYNOS_4212_USB_ISOL_HSIC0 (1 << 0)
>> +#define EXYNOS_4212_USB_ISOL_HSIC1_OFFSET 0x8
>> +#define EXYNOS_4212_USB_ISOL_HSIC1 (1 << 0)
>> +
>> +enum exynos4x12_phy_id {
>> + EXYNOS4212_DEVICE,
>> + EXYNOS4212_HOST,
>> + EXYNOS4212_HSIC0,
>> + EXYNOS4212_HSIC1,
>> + EXYNOS4212_NUM_PHYS,
>> +};
>> +
>> +/* exynos4212_rate_to_clk() converts the supplied clock rate to the value that
>> + * can be written to the phy register. */
>> +static u32 exynos4212_rate_to_clk(unsigned long rate)
>> +{
>> + unsigned int clksel;
>> +
>> + /* EXYNOS_4212_UPHYCLK_PHYFSEL_MASK */
>> +
>> + switch (rate) {
>> + case 9600 * KHZ:
>> + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_9MHZ6;
>> + break;
>> + case 10 * MHZ:
>> + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_10MHZ;
>> + break;
>> + case 12 * MHZ:
>> + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_12MHZ;
>> + break;
>> + case 19200 * KHZ:
>> + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_19MHZ2;
>> + break;
>> + case 20 * MHZ:
>> + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_20MHZ;
>> + break;
>> + case 24 * MHZ:
>> + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_24MHZ;
>> + break;
>> + case 50 * MHZ:
>> + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_50MHZ;
>> + break;
>> + default:
>> + clksel = CLKSEL_ERROR;
>> + }
>> +
>> + return clksel;
>> +}
>> +
>> +static void exynos4212_isol(struct uphy_instance *inst, bool on)
>> +{
>> + struct uphy_driver *drv = inst->drv;
>> + u32 offset;
>> + u32 mask;
>> + u32 tmp;
>> +
>> + if (!drv->reg_isol)
>> + return;
>> +
>> + switch (inst->cfg->id) {
>> + case EXYNOS4212_DEVICE:
>> + offset = EXYNOS_4212_USB_ISOL_OFFSET;
>> + mask = EXYNOS_4212_USB_ISOL_OTG;
>> + break;
>> + case EXYNOS4212_HOST:
>> + offset = EXYNOS_4212_USB_ISOL_OFFSET;
>> + mask = EXYNOS_4212_USB_ISOL_OTG;
>> + break;
>> + case EXYNOS4212_HSIC0:
>> + offset = EXYNOS_4212_USB_ISOL_HSIC0_OFFSET;
>> + mask = EXYNOS_4212_USB_ISOL_HSIC0;
>> + break;
>> + case EXYNOS4212_HSIC1:
>> + offset = EXYNOS_4212_USB_ISOL_HSIC1_OFFSET;
>> + mask = EXYNOS_4212_USB_ISOL_HSIC1;
>> + break;
>> + default:
>> + return;
>> + };
>> +
>> + tmp = readl(drv->reg_isol + offset);
>> + if (on)
>> + tmp &= ~mask;
>> + else
>> + tmp |= mask;
>> + writel(tmp, drv->reg_isol + offset);
>> +}
>> +
>> +static void exynos4212_phy_pwr(struct uphy_instance *inst, bool on)
>> +{
>> + struct uphy_driver *drv = inst->drv;
>> + u32 rstbits = 0;
>> + u32 phypwr = 0;
>> + u32 rst;
>> + u32 pwr;
>> +
>> + switch (inst->cfg->id) {
>> + case EXYNOS4212_DEVICE:
>> + phypwr = EXYNOS_4212_UPHYPWR_DEV;
>> + rstbits = EXYNOS_4212_URSTCON_DEVICE;
>> + break;
>> + case EXYNOS4212_HOST:
>> + phypwr = EXYNOS_4212_UPHYPWR_HOST;
>> + rstbits = EXYNOS_4212_URSTCON_HOST_PHY;
>> + break;
>> + case EXYNOS4212_HSIC0:
>> + phypwr = EXYNOS_4212_UPHYPWR_HSCI0;
>> + rstbits = EXYNOS_4212_URSTCON_HSIC1 |
>> + EXYNOS_4212_URSTCON_HOST_LINK_P0 |
>> + EXYNOS_4212_URSTCON_HOST_PHY;
>> + break;
>> + case EXYNOS4212_HSIC1:
>> + phypwr = EXYNOS_4212_UPHYPWR_HSCI1;
>> + rstbits = EXYNOS_4212_URSTCON_HSIC1 |
>> + EXYNOS_4212_URSTCON_HOST_LINK_P1;
>> + break;
>> + };
>> +
>> + if (on) {
>> + writel(inst->clk, drv->reg_phy + EXYNOS_4212_UPHYCLK);
>> +
>> + pwr = readl(drv->reg_phy + EXYNOS_4212_UPHYPWR);
>> + pwr &= ~phypwr;
>> + writel(pwr, drv->reg_phy + EXYNOS_4212_UPHYPWR);
>> +
>> + rst = readl(drv->reg_phy + EXYNOS_4212_UPHYRST);
>> + rst |= rstbits;
>> + writel(rst, drv->reg_phy + EXYNOS_4212_UPHYRST);
>> + udelay(10);
>> + rst &= ~rstbits;
>> + writel(rst, drv->reg_phy + EXYNOS_4212_UPHYRST);
>> + } else {
>> + pwr = readl(drv->reg_phy + EXYNOS_4212_UPHYPWR);
>> + pwr |= phypwr;
>> + writel(pwr, drv->reg_phy + EXYNOS_4212_UPHYPWR);
>> + }
>> +}
>> +
>> +static int exynos4212_power_on(struct uphy_instance *inst)
>> +{
>> + struct uphy_driver *drv = inst->drv;
>> +
>> + if (inst->state == STATE_ON) {
>> + dev_err(drv->dev, "usb phy \"%s\" already on",
>> + inst->cfg->label);
>> + return -ENODEV;
>> + }
>> +
>> + inst->state = STATE_ON;
>> + inst->ref_cnt++;
>> + if (inst->ref_cnt > 1)
>> + return 0;
>> +
>> + exynos4212_isol(inst, 0);
>> + exynos4212_phy_pwr(inst, 1);
>> +
>> + /* Power on the device, as it is necessary for HSIC to work */
>> + if (inst->cfg->id == EXYNOS4212_HSIC0) {
>> + struct uphy_instance *device =
>> + &drv->uphy_instances[EXYNOS4212_DEVICE];
>> + device->ref_cnt++;
>> + if (device->ref_cnt > 1)
>> + return 0;
>> + exynos4212_phy_pwr(device, 1);
>> + exynos4212_isol(device, 0);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int exynos4212_power_off(struct uphy_instance *inst)
>> +{
>> + struct uphy_driver *drv = inst->drv;
>> +
>> + if (inst->state == STATE_OFF) {
>> + dev_err(drv->dev, "usb phy \"%s\" already off",
>> + inst->cfg->label);
>> + return -EINVAL;
>> + }
>> +
>> + inst->state = STATE_OFF;
>> + inst->ref_cnt--;
>> +
>> + if (inst->ref_cnt > 0)
>> + return 0;
>> +
>> + exynos4212_phy_pwr(inst, 0);
>> + exynos4212_isol(inst, 1);
>> +
>> + if (inst->cfg->id == EXYNOS4212_HSIC0) {
>> + struct uphy_instance *device =
>> + &drv->uphy_instances[EXYNOS4212_DEVICE];
>> + device->ref_cnt--;
>> + if (device->ref_cnt > 0)
>> + return 0;
>> + exynos4212_phy_pwr(device, 0);
>> + exynos4212_isol(device, 1);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +
>> +static const struct common_phy exynos4212_phys[] = {
>> + {
>> + .label = "device",
>> + .type = PHY_DEVICE,
>> + .id = EXYNOS4212_DEVICE,
>> + .rate_to_clk = exynos4212_rate_to_clk,
>> + .power_on = exynos4212_power_on,
>> + .power_off = exynos4212_power_off,
>> + },
>> + {
>> + .label = "host",
>> + .type = PHY_HOST,
>> + .id = EXYNOS4212_HOST,
>> + .rate_to_clk = exynos4212_rate_to_clk,
>> + .power_on = exynos4212_power_on,
>> + .power_off = exynos4212_power_off,
>> + },
>> + {
>> + .label = "hsic0",
>> + .type = PHY_HOST,
>> + .id = EXYNOS4212_HSIC0,
>> + .rate_to_clk = exynos4212_rate_to_clk,
>> + .power_on = exynos4212_power_on,
>> + .power_off = exynos4212_power_off,
>> + },
>> + {
>> + .label = "hsic1",
>> + .type = PHY_HOST,
>> + .id = EXYNOS4212_HSIC1,
>> + .rate_to_clk = exynos4212_rate_to_clk,
>> + .power_on = exynos4212_power_on,
>> + .power_off = exynos4212_power_off,
>> + },
>> + {},
>> +};
>> +
>> +const struct uphy_config exynos4212_uphy_config = {
>> + .cpu = TYPE_EXYNOS4212,
>> + .num_phys = EXYNOS4212_NUM_PHYS,
>> + .phys = exynos4212_phys,
>> +};
>> +
>> --
>> 1.7.9.5
>>
>> --
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>
>
>
> --
> Best Regards
> Vivek



--
Best Regards
Vivek


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