[PATCH v8 1/2] usb: phy: samsung: Introducing usb phy driver for hsotg

[Praveen Paneri]

Hi Tomasz,

On Wed, Jan 9, 2013 at 11:28 AM, Praveen Paneri <p.paneri at samsung.com> wrote:
> Hi Tomasz,
>
> Sorry! I I missed this comment of yours. Is it okay if we keep
> pmu_isolation as it is (as it does not seem much out of the line). We
> have already gone through a lot of rework and there has been no
> fruitful result :(
> Also after Viveks work, this is only milited to non DT SoCs.
>
> Thanks,
> Praveen
>
> On Wed, Nov 28, 2012 at 6:32 PM, Tomasz Figa <t.figa at samsung.com> wrote:
>> Hi Praveen,
>>
>> On Friday 23 of November 2012 09:56:37 Praveen Paneri wrote:
>>> >> +static void samsung_usbphy_enable(struct samsung_usbphy *sphy)
>>> >> +{
>>> >> +     void __iomem *regs = sphy->regs;
>>> >> +     u32 phypwr;
>>> >> +     u32 phyclk;
>>> >> +     u32 rstcon;
>>> >> +
>>> >> +     /* set clock frequency for PLL */
>>> >> +     phyclk = sphy->ref_clk_freq;
>>> >> +     phypwr = readl(regs + SAMSUNG_PHYPWR);
>>> >> +     rstcon = readl(regs + SAMSUNG_RSTCON);
>>> >> +
>>> >> +     switch (sphy->cpu_type) {
>>> >> +     case TYPE_S3C64XX:
>>> >> +             phyclk &= ~PHYCLK_COMMON_ON_N;
>>> >> +             phypwr &= ~PHYPWR_NORMAL_MASK;
>>> >> +             rstcon |= RSTCON_SWRST;
>>> >> +             break;
>>> >> +     case TYPE_EXYNOS4210:
>>> >> +             phypwr &= ~PHYPWR_NORMAL_MASK_PHY0;
>>> >> +             rstcon |= RSTCON_SWRST;
>>> >> +     default:
>>> >> +             break;
>>> >> +     }
>>> >> +
>>> >> +     writel(phyclk, regs + SAMSUNG_PHYCLK);
>>> >> +     /* set to normal of PHY0 */
>>> >
>>> > I don't understand this comment.
>>>
>>> Will change it to " Configure PHY0 for normal operation"
>>> That should be more clear, I suppose.
>>
>> Yes, much better.
>>
>>> >> + */
>>> >> +
>>> >> +#ifndef __SAMSUNG_USBPHY_PLATFORM_H
>>> >> +#define __SAMSUNG_USBPHY_PLATFORM_H
>>> >> +
>>> >> +/**
>>> >> + * samsung_usbphy_data - Platform data for USB PHY driver.
>>> >> + * @pmu_isolation: Function to control usb phy isolation in PMU.
>>> >> + */
>>> >> +struct samsung_usbphy_data {
>>> >> +     void (*pmu_isolation)(int on);
>>> >
>>> > I believe this should be named in a generic way. This is called PMU
>>> > isolation on Exynos SoCs, but on S3C64xx it's USB PHY mask.
>>>
>>> Yes! I am aware of it. The fact that this ( MASK or ISOLATION) has
>>> always been part of the PMU, pmu_isolation seems quite generic that
>>> way. Though you can suggest a better name.
>>
>> What do you think about set_isolation(int on) or power_isolation(int on)?
Please ignore the below text. I did not plan to send this :P
It was just an old draft written in a bad mood :(

Regards,
Praveen
> Sorry! I don't understand the point here.Why to invest so much of time
> and evergy on things we want to remove soon.
> I am a bit reluctant to change this now, after sending 9 versions of
> the same code.
> Lets concentrate on more important things like AUXDATA removal or
> adding support for all DT enabled machines.
>>
>> Best regards,
>> --
>> Tomasz Figa
>> Samsung Poland R&D Center
>> SW Solution Development, Linux Platform
>>
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