Quoting Sebastian Hesselbarth (2015-01-10 05:08:22)
> On 09.01.2015 13:13, Jisheng Zhang wrote:
> > On Wed, 7 Jan 2015 06:30:55 -0800
> > Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx> wrote:
> >> On 07.01.2015 15:22, Jisheng Zhang wrote:
> >>> On Wed, 7 Jan 2015 06:11:58 -0800
> >>> Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx> wrote:
> >>>> On 31.12.2014 09:57, Jisheng Zhang wrote:
> >>>>> The "smemc" clock is removed on BG2Q SoCs. In fact, bit19 of clkenable
> >>>>> register is for nfc. Current code use bit19 for non-exist "smemc"
> >>>>> incorrectly, this prevents eMMC from working due to the sdhci's
> >>>>> "core" clk is still gated.
> >>>>>
> >>>>> Signed-off-by: Jisheng Zhang <jszhang@xxxxxxxxxxx>
> >>>>> Cc: stable@xxxxxxxxxxxxxxx # 3.16+
> >>>>> ---
> >>>>> drivers/clk/berlin/bg2q.c | 1 -
> >>>>> 1 file changed, 1 deletion(-)
> >>>>>
> >>>>> diff --git a/drivers/clk/berlin/bg2q.c b/drivers/clk/berlin/bg2q.c
> >>>>> index 21784e4..440ef81 100644
> >>>>> --- a/drivers/clk/berlin/bg2q.c
> >>>>> +++ b/drivers/clk/berlin/bg2q.c
> >>>>> @@ -285,7 +285,6 @@ static const struct berlin2_gate_data bg2q_gates[]
> >>>>> __initconst = { { "pbridge", "perif", 15,
> >>>>> CLK_IGNORE_UNUSED }, { "sdio", "perif", 16,
> >>>>> CLK_IGNORE_UNUSED }, { "nfc", "perif", 18 },
> >>>
> >>> The nfc here is really confusing, we call it as nfccore internally. Is it
> >>> better to rename it as nfccore?
> >>
> >> I guess it comes from some early Marvell BSP code, if there is no
> >> issues with the name, e.g. something already depends on "nfc", feel
> >> free to rename it to something more meaningful.
> >
> > In BG2, mrvl call the clock as nfccore. The code use "nfc" for it.
> > The situation is similar for usbcore, satacore etc. So keep the name here,
> > what do you think?
>
> Yes, I am fine with keeping the name as is.
>
> >>>>> - { "smemc", "perif", 19 },
> >>>>
> >>>> if bit 19 is for nfc, how does that work out with bit 18 which is
> >>>> still assigned to nfc? Can you re-evaluate clkenable registers for
> >>>
> >>> bit 19 is for nfcEcc, the "io" clock; bit 18 is for nfcCore, the "core"
> >>> clock.
> >>
> >> Ok, then both bits should be dealt with accordingly, i.e. rename
> >> "smemc" to "nfcecc" and use it in the corresponding dts node.
> >>
> >> If this clk_gate just disables a clock that is fed into another
> >> gateable clock module, I can live with removing it - although I
> >> still think it is best to leave the clk_gate in place and pick
> >> another name that does not collide with any other clock name.
> >
> > The nfcecc is already defined in the bg2q_divs, the gate bit is correct there.
>
> Ok, I had a look in the actual code and agree that the same bit 19
> is used twice. The patch is fine and we can take it as is.
>
> This is clk subsystem, so either Mike takes it through his fixes branch
> including my
>
> Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx>
>
> or decides to agree that I take it instead with his Ack. I am fine
> with both.
Acked-by: Michael Turquette <mturquette@xxxxxxxxxx>
Now the three fixes can stay together and live happily ever after.
Regards,
Mike
>
> Sebastian
>
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