Subject: [PATCH] ARM: exynos_defconfig: Disable big.LITTLE switcher

Disable big.LITTLE switcher in order to allow automatic usage of
cpufreq-dt driver on Exynos542x/Exynos5800 SoCs based boards.

This change should not cause any problems as arm_big_little[_dt]
driver (which is using big.LITTLE switcher support to do the "real"
big.LITTLE switching work) is not used on any Exynos SoC based
board currently.

Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
---
arch/arm/configs/exynos_defconfig | 2 --
1 file changed, 2 deletions(-)

diff --git a/arch/arm/configs/exynos_defconfig b/arch/arm/configs/exynos_defconfig
index a8cf295..07d4168 100644
--- a/arch/arm/configs/exynos_defconfig
+++ b/arch/arm/configs/exynos_defconfig
@@ -13,8 +13,6 @@ CONFIG_ARCH_EXYNOS3=y
CONFIG_EXYNOS5420_MCPM=y
CONFIG_SMP=y
CONFIG_BIG_LITTLE=y
-CONFIG_BL_SWITCHER=y
-CONFIG_BL_SWITCHER_DUMMY_IF=y
CONFIG_NR_CPUS=8
CONFIG_PREEMPT=y
CONFIG_AEABI=y
--
1.9.1



2016-04-28 14:55:17

by Markus Reichl

[permalink] [raw]
Subject: Re: [PATCH] ARM: exynos_defconfig: Disable big.LITTLE switcher

Hi Bartlomiej,

Tested on Odroid XU3 and XU4.

Tested-by: Markus Reichl <[email protected]>

Am 28.04.2016 um 16:44 schrieb Bartlomiej Zolnierkiewicz:
> Disable big.LITTLE switcher in order to allow automatic usage of
> cpufreq-dt driver on Exynos542x/Exynos5800 SoCs based boards.
>
> This change should not cause any problems as arm_big_little[_dt]
> driver (which is using big.LITTLE switcher support to do the "real"
> big.LITTLE switching work) is not used on any Exynos SoC based
> board currently.
>
> Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
> ---
> arch/arm/configs/exynos_defconfig | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/arch/arm/configs/exynos_defconfig b/arch/arm/configs/exynos_defconfig
> index a8cf295..07d4168 100644
> --- a/arch/arm/configs/exynos_defconfig
> +++ b/arch/arm/configs/exynos_defconfig
> @@ -13,8 +13,6 @@ CONFIG_ARCH_EXYNOS3=y
> CONFIG_EXYNOS5420_MCPM=y
> CONFIG_SMP=y
> CONFIG_BIG_LITTLE=y
> -CONFIG_BL_SWITCHER=y
> -CONFIG_BL_SWITCHER_DUMMY_IF=y
> CONFIG_NR_CPUS=8
> CONFIG_PREEMPT=y
> CONFIG_AEABI=y
>

Thanks,
--
Markus Reichl

2016-04-28 16:04:38

by Javier Martinez Canillas

[permalink] [raw]
Subject: Re: [PATCH] ARM: exynos_defconfig: Disable big.LITTLE switcher

Hello Bartlomiej,

On 04/28/2016 10:44 AM, Bartlomiej Zolnierkiewicz wrote:
> Disable big.LITTLE switcher in order to allow automatic usage of
> cpufreq-dt driver on Exynos542x/Exynos5800 SoCs based boards.
>
> This change should not cause any problems as arm_big_little[_dt]
> driver (which is using big.LITTLE switcher support to do the "real"
> big.LITTLE switching work) is not used on any Exynos SoC based
> board currently.
>
> Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
> ---

Reviewed-by: Javier Martinez Canillas <[email protected]>

On an Exynos5422 Odroid XU4 and Exynos5800 Peach Pi Chromebook:

Tested-by: Javier Martinez Canillas <[email protected]>

Best regards,
--
Javier Martinez Canillas
Open Source Group
Samsung Research America

2016-04-28 17:44:02

by Anand Moon

[permalink] [raw]
Subject: Re: [PATCH] ARM: exynos_defconfig: Disable big.LITTLE switcher

Hi Bartlomiej,

On 28 April 2016 at 20:14, Bartlomiej Zolnierkiewicz
<[email protected]> wrote:
> Disable big.LITTLE switcher in order to allow automatic usage of
> cpufreq-dt driver on Exynos542x/Exynos5800 SoCs based boards.
>
> This change should not cause any problems as arm_big_little[_dt]
> driver (which is using big.LITTLE switcher support to do the "real"
> big.LITTLE switching work) is not used on any Exynos SoC based
> board currently.
>
> Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
> ---
> arch/arm/configs/exynos_defconfig | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/arch/arm/configs/exynos_defconfig b/arch/arm/configs/exynos_defconfig
> index a8cf295..07d4168 100644
> --- a/arch/arm/configs/exynos_defconfig
> +++ b/arch/arm/configs/exynos_defconfig
> @@ -13,8 +13,6 @@ CONFIG_ARCH_EXYNOS3=y
> CONFIG_EXYNOS5420_MCPM=y
> CONFIG_SMP=y
> CONFIG_BIG_LITTLE=y
> -CONFIG_BL_SWITCHER=y
> -CONFIG_BL_SWITCHER_DUMMY_IF=y
> CONFIG_NR_CPUS=8
> CONFIG_PREEMPT=y
> CONFIG_AEABI=y
> --
> 1.9.1
>

Tested On Odroid XU4.

Reviewed-by: Anand Moon <[email protected]>
Tested-by: Anand Moon <[email protected]>

Best Regards
-Anand Moon

>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html

2016-04-29 12:08:53

by Krzysztof Kozlowski

[permalink] [raw]
Subject: Re: [PATCH] ARM: exynos_defconfig: Disable big.LITTLE switcher

On 04/28/2016 04:44 PM, Bartlomiej Zolnierkiewicz wrote:
> Disable big.LITTLE switcher in order to allow automatic usage of
> cpufreq-dt driver on Exynos542x/Exynos5800 SoCs based boards.
>
> This change should not cause any problems as arm_big_little[_dt]
> driver (which is using big.LITTLE switcher support to do the "real"
> big.LITTLE switching work) is not used on any Exynos SoC based
> board currently.
>
> Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
> ---
> arch/arm/configs/exynos_defconfig | 2 --
> 1 file changed, 2 deletions(-)

I agree. I pushed out my queue and I do not plan to push 3rd round so
this will wait till v4.8.

Anyway:
Reviewed-by: Krzysztof Kozlowski <[email protected]>

Best regards,
Krzysztof