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[PATCHi v2] ARM: dts: Fix bootup issue on smdk5250

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  [PATCHi v2] ARM: dts: Fix bootup issue on smdk5250 Pankaj Dubey <pankaj.dubey@samsung.com> - 2015-08-18 08:30 +0200
    Re: [PATCHi v2] ARM: dts: Fix bootup issue on smdk5250 Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2015-08-18 09:10 +0200

#1209067 — [PATCHi v2] ARM: dts: Fix bootup issue on smdk5250

From: Yadwinder Singh Brar <yadi.brar01@gmail.com>

With default config on smdk5250 latest tree throws below message :

[    2.226049] thermal thermal_zone0: critical temperature reached(224 C),shutting down
[    2.227840] reboot: Failed to start orderly shutdown: forcing the issue

and hangs randomly because it reads wrong temperature value.

I can't figure out any direct relation between LDO10 and TMU from board
schematics which I have. So making LDO10 always-on to fix issue for now.

Signed-off-by: Yadwinder Singh Brar <yadi.brar01@gmail.com>
[pankaj.dubey: resubmitted after rebasing to latest kgene tree]
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Tested-by: Pankaj Dubey <pankaj.dubey@samsung.com>
---
Resending this patch after rebasing. Previous discussion can be found here [1]


[1]: http://www.spinics.net/lists/linux-samsung-soc/msg39100.html

Changes since v1:
 - Rebased on latest kgene tree, test booting and s2r on SMDK5250 board.
 - Removed Yadwinder Singh's Samsung's email id as it's no more valid.
 - Added my Signed-off-by for touching this file and patch.

 arch/arm/boot/dts/exynos5250-smdk5250.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/exynos5250-smdk5250.dts b/arch/arm/boot/dts/exynos5250-smdk5250.dts
index 15aea76..c625e71 100644
--- a/arch/arm/boot/dts/exynos5250-smdk5250.dts
+++ b/arch/arm/boot/dts/exynos5250-smdk5250.dts
@@ -197,6 +197,7 @@
 				regulator-name = "P1.8V_LDO_OUT10";
 				regulator-min-microvolt = <1800000>;
 				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
 			};
 
 			ldo11_reg: LDO11 {
-- 
2.4.5

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#1209083

On 18.08.2015 15:29, Pankaj Dubey wrote:
> From: Yadwinder Singh Brar <yadi.brar01@gmail.com>
> 
> With default config on smdk5250 latest tree throws below message :
> 
> [    2.226049] thermal thermal_zone0: critical temperature reached(224 C),shutting down
> [    2.227840] reboot: Failed to start orderly shutdown: forcing the issue
> 
> and hangs randomly because it reads wrong temperature value.
> 
> I can't figure out any direct relation between LDO10 and TMU from board
> schematics which I have. So making LDO10 always-on to fix issue for now.
> 
> Signed-off-by: Yadwinder Singh Brar <yadi.brar01@gmail.com>
> [pankaj.dubey: resubmitted after rebasing to latest kgene tree]
> Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
> Tested-by: Pankaj Dubey <pankaj.dubey@samsung.com>
> ---
> Resending this patch after rebasing. Previous discussion can be found here [1]
> 
> 
> [1]: http://www.spinics.net/lists/linux-samsung-soc/msg39100.html
> 
> Changes since v1:
>  - Rebased on latest kgene tree, test booting and s2r on SMDK5250 board.
>  - Removed Yadwinder Singh's Samsung's email id as it's no more valid.
>  - Added my Signed-off-by for touching this file and patch.
> 
>  arch/arm/boot/dts/exynos5250-smdk5250.dts | 1 +
>  1 file changed, 1 insertion(+)

Since previous discussion ([1] above) there have not been any updates on
cause of this issue so I think this should go in:

Acked-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

Best regards,
Krzysztof

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