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Date: Thu, 30 Jan 2014 13:03:11 +0530
From: Vivek Gautam <gautamvivek1987@...il.com>
To: Kishon Vijay Abraham I <kishon@...com>
Cc: Vivek Gautam <gautam.vivek@...sung.com>,
Linux USB Mailing List <linux-usb@...r.kernel.org>,
"linux-samsung-soc@...r.kernel.org"
<linux-samsung-soc@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
linux-doc@...r.kernel.org, Greg KH <gregkh@...uxfoundation.org>,
Kukjin Kim <kgene.kim@...sung.com>,
Felipe Balbi <balbi@...com>, Tomasz Figa <t.figa@...sung.com>,
Kamil Debski <k.debski@...sung.com>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Julius Werner <jwerner@...omium.org>,
Jingoo Han <jg1.han@...sung.com>
Subject: Re: [PATCH v3] phy: Add new Exynos5 USB 3.0 PHY driver
Hi,
On Thu, Jan 30, 2014 at 11:48 AM, Kishon Vijay Abraham I <kishon@...com> wrote:
> Hi,
>
> On Thursday 30 January 2014 09:49 AM, Vivek Gautam wrote:
>> Hi Kishon,
>>
>>
>> On Mon, Jan 27, 2014 at 2:27 PM, Kishon Vijay Abraham I <kishon@...com> wrote:
>>> Hi,
>>
>> Thanks for review. Please find my answers inline below.
>>
>>>
>>> On Monday 20 January 2014 07:12 PM, Vivek Gautam wrote:
>>>> Add a new driver for the USB 3.0 PHY on Exynos5 series of SoCs.
>>>> The new driver uses the generic PHY framework and will interact
>>>> with DWC3 controller present on Exynos5 series of SoCs.
>>>> Thereby, removing old phy-samsung-usb3 driver and related code
>>>> used untill now which was based on usb/phy framework.
>>>>
>>>> Signed-off-by: Vivek Gautam <gautam.vivek@...sung.com>
>>>> ---
>>>>
>>>> Changes from v2:
>>>> 1) Added support for multiple PHYs (UTMI+ and PIPE3) and
>>>> related changes in the driver structuring.
>>>> 2) Added a xlate function to get the required phy out of
>>>> number of PHYs in mutiple PHY scenerio.
>>>> 3) Changed the names of few structures and variables to
>>>> have a clearer meaning.
>>>> 4) Added 'usb3phy_config' structure to take care of mutiple
>>>> phys for a SoC having 'exynos5_usb3phy_drv_data' driver data.
>>>> 5) Not deleting support for old driver 'phy-samsung-usb3' until
>>>> required support for generic phy is added to DWC3.
>>>>
>>>> .../devicetree/bindings/phy/samsung-phy.txt | 49 ++
>>>> drivers/phy/Kconfig | 8 +
>>>> drivers/phy/Makefile | 1 +
>>>> drivers/phy/phy-exynos5-usb3.c | 621 ++++++++++++++++++++
>>>> 4 files changed, 679 insertions(+)
>>>> create mode 100644 drivers/phy/phy-exynos5-usb3.c
>> [snip]
>>
>>>> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
>>>> index 330ef2d..32f9f38 100644
>>>> --- a/drivers/phy/Kconfig
>>>> +++ b/drivers/phy/Kconfig
>>>> @@ -51,4 +51,12 @@ config PHY_EXYNOS_DP_VIDEO
>>>> help
>>>> Support for Display Port PHY found on Samsung EXYNOS SoCs.
>>>>
>>>> +config PHY_EXYNOS5_USB3
>
> This shouldn't be USB3 since this driver has support for both USB2 and USB3.
> maybe just PHY_EXYNOS5_USB?
Ok, will change this.
>>>> + tristate "Exynos5 SoC series USB 3.0 PHY driver"
>>>> + depends on ARCH_EXYNOS5
>>>> + select GENERIC_PHY
>>>> + select MFD_SYSCON
>>>
>>> add depends on 'HAS_IOMEM'. Someone reported getting
>>> undefined reference to `devm_ioremap_resource' with it.
>>
>> Ok will add it.
>>
>>>> + help
>>>> + Enable USB 3.0 PHY support for Exynos 5 SoC series
>>>> +
>>>> endmenu
>> [snip]
>>
>>>> diff --git a/drivers/phy/phy-exynos5-usb3.c b/drivers/phy/phy-exynos5-usb3.c
>>>> new file mode 100644
>>>> index 0000000..24efed0
>>>> --- /dev/null
>>>> +++ b/drivers/phy/phy-exynos5-usb3.c
>>>> @@ -0,0 +1,621 @@
>>>> +/*
>>>> + * Samsung EXYNOS5 SoC series USB 3.0 PHY driver
>>>> + *
>>>> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
>>>> + * Author: Vivek Gautam <gautam.vivek@...sung.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/mutex.h>
>>>> +#include <linux/mfd/syscon.h>
>>>> +#include <linux/regmap.h>
>>>> +
>>>> +/* Exynos USB PHY registers */
>>>> +#define EXYNOS5_FSEL_9MHZ6 0x0
>>>> +#define EXYNOS5_FSEL_10MHZ 0x1
>>>> +#define EXYNOS5_FSEL_12MHZ 0x2
>>>> +#define EXYNOS5_FSEL_19MHZ2 0x3
>>>> +#define EXYNOS5_FSEL_20MHZ 0x4
>>>> +#define EXYNOS5_FSEL_24MHZ 0x5
>>>> +#define EXYNOS5_FSEL_50MHZ 0x7
>>>> +
>>>> +/* EXYNOS5: USB 3.0 DRD PHY registers */
>>>> +#define EXYNOS5_DRD_LINKSYSTEM (0x04)
>>>> +
>>>> +#define LINKSYSTEM_FLADJ_MASK (0x3f << 1)
>>>> +#define LINKSYSTEM_FLADJ(_x) ((_x) << 1)
>>>> +#define LINKSYSTEM_XHCI_VERSION_CONTROL (0x1 << 27)
>>>> +
>>>> +#define EXYNOS5_DRD_PHYUTMI (0x08)
>>>> +
>>>> +#define PHYUTMI_OTGDISABLE (0x1 << 6)
>>>> +#define PHYUTMI_FORCESUSPEND (0x1 << 1)
>>>> +#define PHYUTMI_FORCESLEEP (0x1 << 0)
>>>
>>> use BIT macro here and below?
>>
>> Ok.
>>
>>>> +
>>>> +#define EXYNOS5_DRD_PHYPIPE (0x0c)
>>>> +
>>>> +#define EXYNOS5_DRD_PHYCLKRST (0x10)
>>>> +
>>>> +#define PHYCLKRST_EN_UTMISUSPEND (0x1 << 31)
>>>> +
>>>> +#define PHYCLKRST_SSC_REFCLKSEL_MASK (0xff << 23)
>>>> +#define PHYCLKRST_SSC_REFCLKSEL(_x) ((_x) << 23)
>>>> +
>>>> +#define PHYCLKRST_SSC_RANGE_MASK (0x03 << 21)
>>>> +#define PHYCLKRST_SSC_RANGE(_x) ((_x) << 21)
>>>> +
>>>> +#define PHYCLKRST_SSC_EN (0x1 << 20)
>>>> +#define PHYCLKRST_REF_SSP_EN (0x1 << 19)
>>>> +#define PHYCLKRST_REF_CLKDIV2 (0x1 << 18)
>>>> +
>>>> +#define PHYCLKRST_MPLL_MULTIPLIER_MASK (0x7f << 11)
>>>> +#define PHYCLKRST_MPLL_MULTIPLIER_100MHZ_REF (0x19 << 11)
>>>> +#define PHYCLKRST_MPLL_MULTIPLIER_50M_REF (0x32 << 11)
>>>> +#define PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF (0x68 << 11)
>>>> +#define PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF (0x7d << 11)
>>>> +#define PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF (0x02 << 11)
>>>> +
>>>> +#define PHYCLKRST_FSEL_MASK (0x3f << 5)
>>>> +#define PHYCLKRST_FSEL(_x) ((_x) << 5)
>>>> +#define PHYCLKRST_FSEL_PAD_100MHZ (0x27 << 5)
>>>> +#define PHYCLKRST_FSEL_PAD_24MHZ (0x2a << 5)
>>>> +#define PHYCLKRST_FSEL_PAD_20MHZ (0x31 << 5)
>>>> +#define PHYCLKRST_FSEL_PAD_19_2MHZ (0x38 << 5)
>>>> +
>>>> +#define PHYCLKRST_RETENABLEN (0x1 << 4)
>>>> +
>>>> +#define PHYCLKRST_REFCLKSEL_MASK (0x03 << 2)
>>>> +#define PHYCLKRST_REFCLKSEL_PAD_REFCLK (0x2 << 2)
>>>> +#define PHYCLKRST_REFCLKSEL_EXT_REFCLK (0x3 << 2)
>>>> +
>>>> +#define PHYCLKRST_PORTRESET (0x1 << 1)
>>>> +#define PHYCLKRST_COMMONONN (0x1 << 0)
>>>> +
>>>> +#define EXYNOS5_DRD_PHYREG0 (0x14)
>>>> +#define EXYNOS5_DRD_PHYREG1 (0x18)
>>>> +
>>>> +#define EXYNOS5_DRD_PHYPARAM0 (0x1c)
>>>> +
>>>> +#define PHYPARAM0_REF_USE_PAD (0x1 << 31)
>>>> +#define PHYPARAM0_REF_LOSLEVEL_MASK (0x1f << 26)
>>>> +#define PHYPARAM0_REF_LOSLEVEL (0x9 << 26)
>>>> +
>>>> +#define EXYNOS5_DRD_PHYPARAM1 (0x20)
>>>> +
>>>> +#define PHYPARAM1_PCS_TXDEEMPH_MASK (0x1f << 0)
>>>> +#define PHYPARAM1_PCS_TXDEEMPH (0x1c)
>>>> +
>>>> +#define EXYNOS5_DRD_PHYTERM (0x24)
>>>> +
>>>> +#define EXYNOS5_DRD_PHYTEST (0x28)
>>>> +
>>>> +#define PHYTEST_POWERDOWN_SSP (0x1 << 3)
>>>> +#define PHYTEST_POWERDOWN_HSP (0x1 << 2)
>>>> +
>>>> +#define EXYNOS5_DRD_PHYADP (0x2c)
>>>> +
>>>> +#define EXYNOS5_DRD_PHYBATCHG (0x30)
>>>> +
>>>> +#define PHYBATCHG_UTMI_CLKSEL (0x1 << 2)
>>>> +
>>>> +#define EXYNOS5_DRD_PHYRESUME (0x34)
>>>> +#define EXYNOS5_DRD_LINKPORT (0x44)
>>>> +
>>>> +/* Power isolation defined in power management unit */
>>>> +#define EXYNOS5_USB3DRD_PHY_PMU_REG_OFFSET (0x704)
>>>> +#define EXYNOS5_USB3DRD_PMU_ISOL (1 << 0)
>>>> +
>>>> +#define KHZ 1000
>>>> +#define MHZ (KHZ * KHZ)
>>>> +
>>>> +enum exynos5_usb3phy_id {
>>>> + EXYNOS5_USB3PHY_UTMI,
>>>> + EXYNOS5_USB3PHY_PIPE3,
>>>> + EXYNOS5_USB3PHYS_NUM,
>>>> +};
>
> here and all the structure names below shouldn't have usb3 in their names since
> this is not just a 'usb3' phy driver..
right, will change the nomenclature driver-wide (including function names too).
>>>> +
>>>> +struct usb3phy_config {
>>>> + u32 id;
>>>> + u32 reg_pmu_offset;
>>>> + void (*phy_isol)(struct phy *phy, u32 on);
>>>> +};
>>>> +
>>>> +struct exynos5_usb3phy_drv_data {
>>>> + bool has_usb30_sclk;
>>>> + bool has_multi_controller;
>>>> + const struct usb3phy_config *phy_cfg;
>>>> +};
>>>> +
>>>> +/**
>>>> + * struct exynos5_usb3phy_driver - driver data for USB 3.0 PHY
>>>
>>> Is this really a driver data? I think it should be just exynos5_usb3phy.
>> Yes, not a driver data, rather just 'exynos_usb3phy' structure. will
>> modify the name
>>
>>>> + * @dev: pointer to device instance of this platform device
>>>> + * @reg_phy: usb phy controller register memory base
>>>> + * @clk: phy clock for register access
>>>> + * @usb30_sclk: additional special clock for phy operations
>>>> + * @drv_data: pointer to SoC level driver data structure
>>>> + * @phys[]: array for 'EXYNOS5_USB3PHYS_NUM' number of PHY
>>>> + * instances each with its 'phy' and 'phy_cfg'.
>>>> + * @extrefclk: frequency select settings when using 'separate
>>>> + * reference clocks' for SS and HS operations
>>>> + * @rate: rate of reference clock to PHY block
>>>> + * @channel: number of PHY channels present in SoC
>>>> + */
>>>> +struct exynos5_usb3phy_driver {
>>>> + struct device *dev;
>>>> + void __iomem *reg_phy;
>>>> + struct clk *clk;
>>>> + struct clk *usb30_sclk;
>>>> + const struct exynos5_usb3phy_drv_data *drv_data;
>>>> + struct phy_usb_instance {
>>>> + struct phy *phy;
>>>> + u32 index;
>>>> + struct regmap *reg_isol;
>>>> + const struct usb3phy_config *phy_cfg;
>>>> + } phys[EXYNOS5_USB3PHYS_NUM];
>>>> + u32 extrefclk;
>>>> + unsigned long rate;
>>>> + u32 channel;
>>>> +};
>>>> +
>>>> +#define to_usb3phy_driver(inst) \
>>>> + container_of((inst), struct exynos5_usb3phy_driver, \
>>>> + phys[(inst)->index]);
>>>> +
>>>> +/*
>>>> + * exynos5_rate_to_clk() converts the supplied clock rate to the value that
>>>> + * can be written to the phy register.
>>>> + */
>>>> +static u32 exynos5_rate_to_clk(unsigned long rate)
>>>> +{
>>>> + unsigned int clksel;
>>>> +
>>>> + /* EXYNOS5_FSEL_MASK */
>>>> +
>>>> + switch (rate) {
>>>> + case 9600 * KHZ:
>>>> + clksel = EXYNOS5_FSEL_9MHZ6;
>>>> + break;
>>>> + case 10 * MHZ:
>>>> + clksel = EXYNOS5_FSEL_10MHZ;
>>>> + break;
>>>> + case 12 * MHZ:
>>>> + clksel = EXYNOS5_FSEL_12MHZ;
>>>> + break;
>>>> + case 19200 * KHZ:
>>>> + clksel = EXYNOS5_FSEL_19MHZ2;
>>>> + break;
>>>> + case 20 * MHZ:
>>>> + clksel = EXYNOS5_FSEL_20MHZ;
>>>> + break;
>>>> + case 24 * MHZ:
>>>> + clksel = EXYNOS5_FSEL_24MHZ;
>>>> + break;
>>>> + case 50 * MHZ:
>>>> + clksel = EXYNOS5_FSEL_50MHZ;
>>>> + break;
>>>> + default:
>>>> + clksel = -EINVAL;
>>>> + }
>>>> +
>>>> + return clksel;
>>>> +}
>>>> +
>>>> +static void exynos5_usb3phy_isol(struct phy *phy, unsigned int on)
>>>> +{
>>>> + u32 pmu_offset;
>>>> + struct phy_usb_instance *inst = phy_get_drvdata(phy);
>>>> + struct exynos5_usb3phy_driver *drv = to_usb3phy_driver(inst);
>>>> +
>>>> + pmu_offset = inst->phy_cfg->reg_pmu_offset;
>>>> + if (!inst->reg_isol)
>>>> + return;
>>>> +
>>>> + switch (drv->channel) {
>>>> + case 1:
>>>> + /* Channel 1 is at 0x708 offset */
>>>> + pmu_offset += sizeof(&pmu_offset);
>>>> + break;
>>>> + case 0:
>>>> + default:
>>>> + /* Channel 0 is at 0x704 offset */
>>>> + break;
>>>> + }
>>>
>>> This can be in a simple 'if' stmt no?
>> What if there are systems with more channels? In that case also we
>> will have to fall back to a switch-case statement ?
>
> right.
>>
>>>> +
>>>> + regmap_update_bits(inst->reg_isol, pmu_offset,
>>>> + EXYNOS5_USB3DRD_PMU_ISOL, ~on);
>>>> +}
>>>> +
>>>> +/*
>>>> + * Sets the phy clk as EXTREFCLK (XXTI) which is internal clock from clock core.
>>>> + */
>>>> +static u32 exynos5_usb3phy_set_refclk(struct exynos5_usb3phy_driver *drv)
>>>> +{
>>>> + u32 reg;
>>>> +
>>>> + reg = PHYCLKRST_REFCLKSEL_EXT_REFCLK |
>>>> + PHYCLKRST_FSEL(drv->extrefclk);
>>>> +
>>>> + switch (drv->extrefclk) {
>>>> + case EXYNOS5_FSEL_50MHZ:
>>>> + reg |= (PHYCLKRST_MPLL_MULTIPLIER_50M_REF |
>>>> + PHYCLKRST_SSC_REFCLKSEL(0x00));
>>>> + break;
>>>> + case EXYNOS5_FSEL_24MHZ:
>>>> + reg |= (PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF |
>>>> + PHYCLKRST_SSC_REFCLKSEL(0x88));
>>>> + break;
>>>> + case EXYNOS5_FSEL_20MHZ:
>>>> + reg |= (PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF |
>>>> + PHYCLKRST_SSC_REFCLKSEL(0x00));
>>>> + break;
>>>> + case EXYNOS5_FSEL_19MHZ2:
>>>> + reg |= (PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF |
>>>> + PHYCLKRST_SSC_REFCLKSEL(0x88));
>>>> + break;
>>>> + default:
>>>> + dev_dbg(drv->dev, "unsupported ref clk\n");
>>>> + break;
>>>> + }
>>>> +
>>>> + return reg;
>>>> +}
>>>> +
>>>> +static int exynos5_usb3phy_init(struct phy *phy)
>>>> +{
>>>> + int ret;
>>>> + u32 phyparam0;
>>>> + u32 phyparam1;
>>>> + u32 linksystem;
>>>> + u32 phybatchg;
>>>> + u32 phytest;
>>>> + u32 phyclkrst;
>>>
>>> instead you can define a single variable 'u32 reg' for register read and writes.
>>
>> Right.
>>
>>>> + struct phy_usb_instance *inst = phy_get_drvdata(phy);
>>>> + struct exynos5_usb3phy_driver *drv = to_usb3phy_driver(inst);
>>>> +
>>>> + ret = clk_prepare_enable(drv->clk);
>>>> + if (ret)
>>>> + return ret;
>>>> +
>>>> + drv->extrefclk = exynos5_rate_to_clk(drv->rate);
>>>> + if (drv->extrefclk == -EINVAL) {
>>>> + dev_err(drv->dev, "Clock rate (%ld) not supported\n",
>>>> + drv->rate);
>>>> + return -EINVAL;
>>>> + }
>>>> +
>>>> + /* Reset USB 3.0 PHY */
>>>> + writel(0x0, drv->reg_phy + EXYNOS5_DRD_PHYREG0);
>>>> +
>>>> + phyparam0 = readl(drv->reg_phy + EXYNOS5_DRD_PHYPARAM0);
>>>> + /* Select PHY CLK source */
>>>> + phyparam0 &= ~PHYPARAM0_REF_USE_PAD;
>>>> + /* Set Loss-of-Signal Detector sensitivity */
>>>> + phyparam0 &= ~PHYPARAM0_REF_LOSLEVEL_MASK;
>>>> + phyparam0 |= PHYPARAM0_REF_LOSLEVEL;
>>>> + writel(phyparam0, drv->reg_phy + EXYNOS5_DRD_PHYPARAM0);
>>>> +
>>>> + writel(0x0, drv->reg_phy + EXYNOS5_DRD_PHYRESUME);
>>>> +
>>>> + /*
>>>> + * Setting the Frame length Adj value[6:1] to default 0x20
>>>> + * See xHCI 1.0 spec, 5.2.4
>>>> + */
>>>> + linksystem = LINKSYSTEM_XHCI_VERSION_CONTROL |
>>>> + LINKSYSTEM_FLADJ(0x20);
>>>> + writel(linksystem, drv->reg_phy + EXYNOS5_DRD_LINKSYSTEM);
>>>> +
>>>> + phyparam1 = readl(drv->reg_phy + EXYNOS5_DRD_PHYPARAM1);
>>>> + /* Set Tx De-Emphasis level */
>>>> + phyparam1 &= ~PHYPARAM1_PCS_TXDEEMPH_MASK;
>>>> + phyparam1 |= PHYPARAM1_PCS_TXDEEMPH;
>>>> + writel(phyparam1, drv->reg_phy + EXYNOS5_DRD_PHYPARAM1);
>>>> +
>>>> + phybatchg = readl(drv->reg_phy + EXYNOS5_DRD_PHYBATCHG);
>>>> + phybatchg |= PHYBATCHG_UTMI_CLKSEL;
>>>> + writel(phybatchg, drv->reg_phy + EXYNOS5_DRD_PHYBATCHG);
>>>> +
>>>> + /* PHYTEST POWERDOWN Control */
>>>> + phytest = readl(drv->reg_phy + EXYNOS5_DRD_PHYTEST);
>>>> + phytest &= ~(PHYTEST_POWERDOWN_SSP |
>>>> + PHYTEST_POWERDOWN_HSP);
>>>> + writel(phytest, drv->reg_phy + EXYNOS5_DRD_PHYTEST);
>>>> +
>>>> + /* UTMI Power Control */
>>>> + writel(PHYUTMI_OTGDISABLE, drv->reg_phy + EXYNOS5_DRD_PHYUTMI);
>>>
>>> All these UTMI configuration should be done in usb2 init.
>> Ok, will move this to separate function.
>>
>>>> +
>>>> + phyclkrst = exynos5_usb3phy_set_refclk(drv);
>>>> +
>>>> + phyclkrst |= PHYCLKRST_PORTRESET |
>>>> + /* Digital power supply in normal operating mode */
>>>> + PHYCLKRST_RETENABLEN |
>>>> + /* Enable ref clock for SS function */
>>>> + PHYCLKRST_REF_SSP_EN |
>>>> + /* Enable spread spectrum */
>>>> + PHYCLKRST_SSC_EN |
>>>> + /* Power down HS Bias and PLL blocks in suspend mode */
>>>> + PHYCLKRST_COMMONONN;
>>>> +
>>>> + writel(phyclkrst, drv->reg_phy + EXYNOS5_DRD_PHYCLKRST);
>>>> +
>>>> + udelay(10);
>>>> +
>>>> + phyclkrst &= ~PHYCLKRST_PORTRESET;
>>>> + writel(phyclkrst, drv->reg_phy + EXYNOS5_DRD_PHYCLKRST);
>>>> +
>>>> + clk_disable_unprepare(drv->clk);
>>>> +
>>>> + return 0;
>>>> +}
>>>> +
>>>> +static int exynos5_usb3phy_exit(struct phy *phy)
>>>> +{
>>>> + int ret;
>>>> + u32 phyutmi;
>>>> + u32 phyclkrst;
>>>> + u32 phytest;
>>>
>>> same here..
>> right, will do it.
>>
>>>> + struct phy_usb_instance *inst = phy_get_drvdata(phy);
>>>> + struct exynos5_usb3phy_driver *drv = to_usb3phy_driver(inst);
>>>> +
>>>> + ret = clk_prepare_enable(drv->clk);
>>>> + if (ret)
>>>> + return ret;
>>>> +
>>>> + phyutmi = PHYUTMI_OTGDISABLE |
>>>> + PHYUTMI_FORCESUSPEND |
>>>> + PHYUTMI_FORCESLEEP;
>>>> + writel(phyutmi, drv->reg_phy + EXYNOS5_DRD_PHYUTMI);
>>>
>>> here too.. UTMI configuration should be part of USB2.
>> ok.
>>
>>>> +
>> [snip]
>>
>>>> +
>>>> +static struct phy_ops exynos5_usb3phy_ops = {
>>>> + .init = exynos5_usb3phy_init,
>>>> + .exit = exynos5_usb3phy_exit,
>>>> + .power_on = exynos5_usb3phy_power_on,
>>>> + .power_off = exynos5_usb3phy_power_off,
>>>> + .owner = THIS_MODULE,
>>>> +};
>>>> +
>>>> +const struct usb3phy_config exynos5_usb3phy_cfg[] = {
>>>> + {
>>>> + .id = EXYNOS5_USB3PHY_UTMI,
>>>
>>> This should be USB2 no?
>> Actually the thought was to have similar naming for enums.
>> EXYNOS5_USB3PHY_UTMI
>> EXYNOS5_USB3PHY_PIPE3
>>
>> Since the entire driver was going that way.
>> But will change these to a more common name
>> EXYNOS5_DRDPHY_UTMI
>> EXYNOS5_DRDPHY_PIPE3,
>> in the same fashion the register names are defined.
>> Will that be fine ?
>
> Yeah.
>
> Thanks
> Kishon
--
Best Regards
Vivek Gautam
Samsung R&D Institute, Bangalore
India
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