Hi Lukasz, On Tue, Dec 17, 2013 at 1:30 PM, Lukasz Majewski <l.majewski@xxxxxxxxxxx> wrote: > Hi Viresh, > >> On 6 December 2013 15:18, Arun Kumar K <arun.kk@xxxxxxxxxxx> wrote: >> > From: "Arjun.K.V" <arjun.kv@xxxxxxxxxxx> >> > >> > The patch adds cpufreq driver for exynos5420. >> > >> > Signed-off-by: Arjun.K.V <arjun.kv@xxxxxxxxxxx> >> > Signed-off-by: Andrew Bresticker <abrestic@xxxxxxxxxxxx> >> > Signed-off-by: Arun Kumar K <arun.kk@xxxxxxxxxxx> >> > --- >> > drivers/cpufreq/Kconfig.arm | 11 ++ >> > drivers/cpufreq/Makefile | 1 + >> > drivers/cpufreq/exynos-cpufreq.c | 2 + >> > drivers/cpufreq/exynos-cpufreq.h | 8 + >> > drivers/cpufreq/exynos5420-cpufreq.c | 346 >> > ++++++++++++++++++++++++++++++++++ 5 files changed, 368 >> > insertions(+) create mode 100644 >> > drivers/cpufreq/exynos5420-cpufreq.c >> >> Hmm.. That's the second big LITTLE SoC after TC2.. >> And we already have a generic enough driver for all big LITTLE >> platforms: arm_big_little.c >> >> Please use that with a glue clk and regulator driver if required. We >> don't want to get any new driver for big LITTLE unless there is a >> real limitation. >> >> Also, the generic big LITTLE driver supports IKS (In Kernel Switcher) >> which may or maynot be used by Exynos. >> >> @Lukasz: We can't use cpu0 driver here as we have multiple clusters >> here A7 and A15, and so there are two clock domains instead of one. >> That's why we have written big LITTLE driver. > > When I first looked into the patch - it was almost identical to the > exynos4210-cpufreq.c or exynos4x12-cpufreq.c files. > > Also I didn't spot the code characteristic to IKS. It seems like the > code in this file is not aware if it runs on A7 or A15. > This initial version was only for A15s and I was planning for an incremental patch for A7s along with common code for the same. Now that is not needed with the generic implementation in place. Regards Arun -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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