[PATCH] ARM: EXYNOS5: Add bus clock and set parent clock for FIMD

[Leela Krishna Amudala]

Hi Jingoo han,

On Wed, Sep 12, 2012 at 7:28 AM, Jingoo Han <jg1.han at samsung.com> wrote:
> On Tuesday, September 11, 2012 6:20 PM Leela Krishna Amudala wrote
>>
>> Hello Jingoo Han,
>>
>> On Tue, Sep 11, 2012 at 5:52 AM, Jingoo Han <jg1.han at samsung.com> wrote:
>> > On Tuesday, September 11, 2012 5:11 AM Leela Krishna Amudala wrote
>> >>
>> >> This patch adds the bus clock for FIMD and changes the device name for lcd clock
>> >> also sets mout_mpll_user as parent clock to fimd
>> >>
>> >> Signed-off-by: Leela Krishna Amudala <l.krishna at samsung.com>
>> >> ---
>> >>  arch/arm/mach-exynos/clock-exynos5.c       |   34 +++++++++++++++++++--------
>> >>  arch/arm/plat-samsung/include/plat/clock.h |    2 +
>> >>  2 files changed, 26 insertions(+), 10 deletions(-)
>> >>
>> >> diff --git a/arch/arm/mach-exynos/clock-exynos5.c b/arch/arm/mach-exynos/clock-exynos5.c
>> >> index 774533c..f1281cf 100644
>> >> --- a/arch/arm/mach-exynos/clock-exynos5.c
>> >> +++ b/arch/arm/mach-exynos/clock-exynos5.c
>> >> @@ -891,6 +891,13 @@ static struct clk exynos5_clk_mdma1 = {
>> >>       .ctrlbit        = (1 << 4),
>> >>  };
>> >>
>> >> +static struct clk exynos5_clk_fimd = {
>> >> +     .name           = "fimd",
>> >> +     .devname        = "exynos5-fb",
>> >
>> >
>> > Replace 'exynos5-fb' with 'exynos5-fb.1', as exynos4 fimd uses exynos4-fb.0
>> > as devname. Exynos5 can use fimd0 or fimd1. Also, Exynos5250 uses fimd1.
>> >
>> >
>> Currently s3c-fb driver using "exynos5-fb" as device name, hence used
>> the same name in the clock.
>> This code is tested with both drm-fimd and s3c-fb fimd and it is
>> working fine showing the display on LCD.
>> If I change the device name in clock file then I have to change it in
>> s3c-fb driver also.
>> So I feel it is better to keep the name as "exynos5-fb" in clock file
>> instead of changing in the driver.
>
> No, there is no need to change the device name in s3c-fb driver.
> Please refer to the patch that I sent 3 months ago.
>         http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg11002.html
>
> Now, Exynos5250 has only 1 FIMD IP; however, other Exynos5 SoCs
> have 2 FIMD IPs. These SoCs have two different clock paths for
> 2 FIMD IPs. Therefore, we need to consider it.
>
>

Okay agreed, will change the devname  to "exynos5-fb.1" in clock file.
Tested with adding DT changes to s3c-fb and with devname
"exynos5-fb.1" in clock file.
works fine for both drm-fimd and s3c-fb fimd. will post the next
version patch soon.

>>
>> Thanks,
>> Leela Krishna Amudala.
>>
>> >> +     .enable         = exynos5_clk_ip_disp1_ctrl,
>> >> +     .ctrlbit        = (1 << 0),
>> >> +};
>> >> +
>> >
>> >
>> > --
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