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From: Krzysztof Kozlowski <krzk@kernel.org>
To: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Chanwoo Choi <cw00.choi@samsung.com>,
	linux-samsung-soc@vger.kernel.org, Marc Zyngier <maz@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Subject: Re: [PATCH v3 1/2] ARM: dts: exynos: Add support ARM architected timers on Exynos5
Date: Wed, 2 Oct 2019 17:43:53 +0200	[thread overview]
Message-ID: <20191002154353.GA3469@kozik-lap> (raw)
In-Reply-To: <20190828121005.29368-2-m.szyprowski@samsung.com>

On Wed, Aug 28, 2019 at 02:10:04PM +0200, Marek Szyprowski wrote:
> All CortexA7/A15 based Exynos5 SoCs have ARM architected timers, so enable
> support for them directly in the base dtsi. None of the known firmware
> properly configures CNTFRQ arch timer register, so force clock frequency
> to 24MHz, which is the only configuration supported by the remaining
> clock drivers so far.
> 
> Stock firmware for Peach Pit and Pi Chromebooks also doesn't reset
> properly other arch timer registers, so add respective properties
> indicating that. Other Exynos5-based boards behaves correctly in this area,
> what finally allows to enable support for KVM-based virtualization.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
>  arch/arm/boot/dts/exynos5420-peach-pit.dts | 4 ++++
>  arch/arm/boot/dts/exynos54xx.dtsi          | 9 +++++++++
>  arch/arm/boot/dts/exynos5800-peach-pi.dts  | 4 ++++

Thanks, applied.

Best regards,
Krzysztof

WARNING: multiple messages have this Message-ID (diff)
From: Krzysztof Kozlowski <krzk@kernel.org>
To: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: linux-samsung-soc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Chanwoo Choi <cw00.choi@samsung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	Marc Zyngier <maz@kernel.org>
Subject: Re: [PATCH v3 1/2] ARM: dts: exynos: Add support ARM architected timers on Exynos5
Date: Wed, 2 Oct 2019 17:43:53 +0200	[thread overview]
Message-ID: <20191002154353.GA3469@kozik-lap> (raw)
Message-ID: <20191002154353.P4wEwvSVF2r5SXSgxt0SejYiOU6XnDkHnLbgDSNOrzc@z> (raw)
In-Reply-To: <20190828121005.29368-2-m.szyprowski@samsung.com>

On Wed, Aug 28, 2019 at 02:10:04PM +0200, Marek Szyprowski wrote:
> All CortexA7/A15 based Exynos5 SoCs have ARM architected timers, so enable
> support for them directly in the base dtsi. None of the known firmware
> properly configures CNTFRQ arch timer register, so force clock frequency
> to 24MHz, which is the only configuration supported by the remaining
> clock drivers so far.
> 
> Stock firmware for Peach Pit and Pi Chromebooks also doesn't reset
> properly other arch timer registers, so add respective properties
> indicating that. Other Exynos5-based boards behaves correctly in this area,
> what finally allows to enable support for KVM-based virtualization.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
>  arch/arm/boot/dts/exynos5420-peach-pit.dts | 4 ++++
>  arch/arm/boot/dts/exynos54xx.dtsi          | 9 +++++++++
>  arch/arm/boot/dts/exynos5800-peach-pi.dts  | 4 ++++

Thanks, applied.

Best regards,
Krzysztof


WARNING: multiple messages have this Message-ID (diff)
From: Krzysztof Kozlowski <krzk@kernel.org>
To: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Chanwoo Choi <cw00.choi@samsung.com>,
	linux-samsung-soc@vger.kernel.org, Marc Zyngier <maz@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Subject: Re: [PATCH v3 1/2] ARM: dts: exynos: Add support ARM architected timers on Exynos5
Date: Wed, 2 Oct 2019 17:43:53 +0200	[thread overview]
Message-ID: <20191002154353.GA3469@kozik-lap> (raw)
In-Reply-To: <20190828121005.29368-2-m.szyprowski@samsung.com>

On Wed, Aug 28, 2019 at 02:10:04PM +0200, Marek Szyprowski wrote:
> All CortexA7/A15 based Exynos5 SoCs have ARM architected timers, so enable
> support for them directly in the base dtsi. None of the known firmware
> properly configures CNTFRQ arch timer register, so force clock frequency
> to 24MHz, which is the only configuration supported by the remaining
> clock drivers so far.
> 
> Stock firmware for Peach Pit and Pi Chromebooks also doesn't reset
> properly other arch timer registers, so add respective properties
> indicating that. Other Exynos5-based boards behaves correctly in this area,
> what finally allows to enable support for KVM-based virtualization.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
>  arch/arm/boot/dts/exynos5420-peach-pit.dts | 4 ++++
>  arch/arm/boot/dts/exynos54xx.dtsi          | 9 +++++++++
>  arch/arm/boot/dts/exynos5800-peach-pi.dts  | 4 ++++

Thanks, applied.

Best regards,
Krzysztof


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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2019-10-02 15:43 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20190828121011eucas1p1ff9b23536aaa79643e5fca10c02db9a0@eucas1p1.samsung.com>
2019-08-28 12:10 ` [PATCH v3 0/2] Exynos SoCs: enable support for ARM Architected Timers Marek Szyprowski
2019-08-28 12:10   ` Marek Szyprowski
2019-08-28 12:10   ` [PATCH v3 1/2] ARM: dts: exynos: Add support ARM architected timers on Exynos5 Marek Szyprowski
2019-08-28 12:10     ` Marek Szyprowski
2019-09-06  1:14     ` Chanwoo Choi
2019-10-02 15:43     ` Krzysztof Kozlowski [this message]
2019-10-02 15:43       ` Krzysztof Kozlowski
2019-10-02 15:43       ` Krzysztof Kozlowski
2019-08-28 12:10   ` [PATCH v3 2/2] ARM: exynos: Enable support for ARM architected timers Marek Szyprowski
2019-08-28 12:10     ` Marek Szyprowski
2019-09-06  1:10     ` Chanwoo Choi
2019-09-09 18:58     ` Krzysztof Kozlowski
2019-09-09 18:58       ` Krzysztof Kozlowski

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