linux-kernel - Re: [PATCH 1/2] thermal: exynos: Fix wrong control of power down detection mode for Exynos7

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Message-id: <20150225132508.5143c9cf@amdc2363>
Date:	Wed, 25 Feb 2015 13:25:08 +0100
From:	Lukasz Majewski <l.majewski@...sung.com>
To:	Eduardo Valentin <edubezval@...il.com>
Cc:	l.majewski@...ess.pl,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] thermal: exynos: Fix wrong control of power down
 detection mode for Exynos7

Hi Eduardo,

> Hi Lukasz,
> 
> On Wed, Feb 25, 2015 at 2:33 PM, Lukasz Majewski
> <l.majewski@...sung.com> wrote:
> > Hi Abhilash,
> >
> >> This patch fixes the wrong control of PD_DET_EN (power down
> >> detection mode) for Exynos7 because exynos7_tmu_control() always
> >> enables the power down detection mode regardless 'on' parameter.
> >>
> >> Cc: Zhang Rui <rui.zhang@...el.com>
> >> Cc: Eduardo Valentin <edubezval@...il.com>
> >> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
> >> ---
> >>  drivers/thermal/samsung/exynos_tmu.c | 3 ++-
> >>  1 file changed, 2 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/thermal/samsung/exynos_tmu.c
> >> b/drivers/thermal/samsung/exynos_tmu.c index 933cd80..a60f527
> >> 100644 --- a/drivers/thermal/samsung/exynos_tmu.c
> >> +++ b/drivers/thermal/samsung/exynos_tmu.c
> >> @@ -682,6 +682,7 @@ static void exynos7_tmu_control(struct
> >> platform_device *pdev, bool on)
> >>       if (on) {
> >>               con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
> >> +             con |= (1 << EXYNOS7_PD_DET_EN_SHIFT);
> >>               interrupt_en =
> >>                       (of_thermal_is_trip_valid(tz, 7)
> >>                       << EXYNOS7_TMU_INTEN_RISE7_SHIFT) |
> >> @@ -704,9 +705,9 @@ static void exynos7_tmu_control(struct
> >> platform_device *pdev, bool on) interrupt_en <<
> >> EXYNOS_TMU_INTEN_FALL0_SHIFT; } else {
> >>               con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
> >> +             con &= ~(1 << EXYNOS7_PD_DET_EN_SHIFT);
> >>               interrupt_en = 0; /* Disable all interrupts */
> >>       }
> >> -     con |= 1 << EXYNOS7_PD_DET_EN_SHIFT;
> >>
> >>       writel(interrupt_en, data->base + EXYNOS7_TMU_REG_INTEN);
> >>       writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
> >
> > Could you test this patch if it isn't introducing any regression on
> > your HW?
> 
> The patch does not cause any regression on exynos7 and seems
> logically correct.
> 
> Tested-by: Abhilash Kesavan <a.kesavan@...sung.com>
> 

Eduardo, it is up to you if you prefer to take this fix directly or via
the new thermal-samsung tree ?

>From when shall I regard myself as a maintainer? :-)


> 
> Regards,
> Abhilash
> >
> > --
> > Best regards,
> >
> > Lukasz Majewski
> >
> > Samsung R&D Institute Poland (SRPOL) | Linux Platform Group


-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group
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