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

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Date:	Wed, 25 Feb 2015 15:01:38 -0400
From:	Eduardo Valentin <edubezval@...il.com>
To:	Lukasz Majewski <l.majewski@...sung.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

On Wed, Feb 25, 2015 at 01:25:08PM +0100, Lukasz Majewski wrote:
> 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? :-)
> 

Yeah. Go ahead and collect it.

> 
> > 
> > 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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