linux-kernel - Re: [PATCHv3] thermal: exynos: Add support for TRIM

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Date:	Fri, 22 Aug 2014 01:24:10 +0900
From:	Chanwoo Choi <cwchoi00@...il.com>
To:	Andreas Färber <afaerber@...e.de>
Cc:	Chanwoo Choi <cw00.choi@...sung.com>,
	"edubezval@...il.com" <edubezval@...il.com>,
	Zhang Rui <rui.zhang@...el.com>,
	"Valentin, Eduardo" <eduardo.valentin@...com>,
	Amit Kachhap <amit.daniel@...sung.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Tomasz Figa <t.figa@...sung.com>, l.majewski@...sung.com,
	naveen krishna <ch.naveen@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCHv3] thermal: exynos: Add support for TRIM_RELOAD feature at Exynos3250

Dear Andreas,

On Thu, Aug 21, 2014 at 7:32 PM, Andreas Färber <afaerber@...e.de> wrote:
> Hello,
>
> Am 21.08.2014 03:38, schrieb Chanwoo Choi:
>> On 08/20/2014 10:38 PM, edubezval@...il.com wrote:
>>> On Tue, Aug 19, 2014 at 7:52 PM, Chanwoo Choi <cw00.choi@...sung.com> wrote:
>>>> diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
>>>> index aa8e0de..8cd609c 100644
>>>> --- a/drivers/thermal/samsung/exynos_tmu_data.c
>>>> +++ b/drivers/thermal/samsung/exynos_tmu_data.c
>>>> @@ -95,6 +95,8 @@ static const struct exynos_tmu_registers exynos3250_tmu_registers = {
>>>>         .triminfo_data = EXYNOS_TMU_REG_TRIMINFO,
>>>>         .triminfo_25_shift = EXYNOS_TRIMINFO_25_SHIFT,
>>>>         .triminfo_85_shift = EXYNOS_TRIMINFO_85_SHIFT,
>>>> +       .triminfo_ctrl[0] = EXYNOS_TMU_TRIMINFO_CON1,
>>>> +       .triminfo_ctrl[1] = EXYNOS_TMU_TRIMINFO_CON2,
>>>>         .tmu_ctrl = EXYNOS_TMU_REG_CONTROL,
>>>>         .test_mux_addr_shift = EXYNOS4412_MUX_ADDR_SHIFT,
>>>>         .buf_vref_sel_shift = EXYNOS_TMU_REF_VOLTAGE_SHIFT,
>>>> @@ -160,8 +162,11 @@ static const struct exynos_tmu_registers exynos3250_tmu_registers = {
>>>>                 .temp_level = 95, \
>>>>         }, \
>>>>         .freq_tab_count = 2, \
>>>> +       .triminfo_reload[0] = 0x1, \
>>>> +       .triminfo_reload[1] = 0x11, \
>>>
>>> What does 0x1 mean? How about 0x11?
>>
>> The bit of 'RELOAD' field in TRIMINFO_CONTROL register is [0].
>> and The bit of 'AC Time' field in TRIMINFO_CONTROL register is [5:4].
>>
>> 0x1 means that set RELOAD field.
>> 0x11 means that set RELOAD field and ACTIME field.
>
> Might be a good idea to use #defines for 0x1 and 0x10 then?

I agree. I'm implementing it to use 'define' keyword.

Thanks,
Chanwoo Choi
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