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Date:	Wed, 6 Nov 2013 18:47:56 +0530
From:	Naveen Krishna Ch <naveenkrishna.ch@...il.com>
To:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:	Naveen Krishna Chatradhi <ch.naveen@...sung.com>,
	linux-pm@...r.kernel.org, rui.zhang@...el.com,
	eduardo.valentin@...com,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>, linux-kernel@...r.kernel.org,
	amit.daniel@...sung.com, Kukjin Kim <kgene.kim@...sung.com>,
	devicetree@...r.kernel.org, cpgs@...sung.com
Subject: Re: [PATCH 1/3 v6] thermal: samsung: add intclr_fall_shift bit in exynos_tmu_register

Hello Bartlomiej,

My reply is very long delayed sorry.

On 17 October 2013 15:33, Bartlomiej Zolnierkiewicz
<b.zolnierkie@...sung.com> wrote:
>
> Hi Naveen,
>
> On Thursday, October 17, 2013 08:41:13 AM Naveen Krishna Chatradhi wrote:
>> On Exynos5250, the FALL interrupt related en, status and clear bits are
>> available at an offset of
>> 16 in INTEN, INTSTAT registers and at an offset of
>> 12 in INTCLEAR register.
>>
>> On Exynos5420, the FALL interrupt related en, status and clear bits are
>> available at an offset of
>> 16 in INTEN, INTSTAT and INTCLEAR registers.
>>
>> On Exynos5440,
>> the FALL_IRQEN bits are at an offset of 4
>> and the RISE_IRQEN bits are at an offset of 0
>>
>> This patch introduces a new bit field intclr_fall_shift to handle the
>> offset for exyns5250 and exynos5440
>>
>> Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@...sung.com>
>> ---
>> Changes since v1:
>> Changes since v2:
>> Changes since v3:
>>   None
>> Changes since v4:
>>  Correct the CLEAR_FALL_INT_SHIFT for Exynos5250/Exynos5440
>> Changes since v5:
>>  Modify the commit message
>
> Thank you but v5 had more issues which are not fixed yet. Please see below.
>
>>  drivers/thermal/samsung/exynos_tmu.c      |    2 +-
>>  drivers/thermal/samsung/exynos_tmu.h      |    2 ++
>>  drivers/thermal/samsung/exynos_tmu_data.c |    2 ++
>>  drivers/thermal/samsung/exynos_tmu_data.h |    4 +++-
>>  4 files changed, 8 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
>> index 32f38b9..b2202fa 100644
>> --- a/drivers/thermal/samsung/exynos_tmu.c
>> +++ b/drivers/thermal/samsung/exynos_tmu.c
>> @@ -265,7 +265,7 @@ skip_calib_data:
>>                               data->base + reg->threshold_th1);
>>
>>               writel((reg->inten_rise_mask << reg->inten_rise_shift) |
>> -                     (reg->inten_fall_mask << reg->inten_fall_shift),
>> +                     (reg->inten_fall_mask << reg->intclr_fall_shift),
>>                               data->base + reg->tmu_intclear);
>>
>>               /* if last threshold limit is also present */
>> diff --git a/drivers/thermal/samsung/exynos_tmu.h b/drivers/thermal/samsung/exynos_tmu.h
>> index 3fb6554..5f4fe6c 100644
>> --- a/drivers/thermal/samsung/exynos_tmu.h
>> +++ b/drivers/thermal/samsung/exynos_tmu.h
>> @@ -136,6 +136,7 @@ enum soc_type {
>>   * @inten_fall3_shift: shift bits of falling 3 interrupt bits.
>>   * @tmu_intstat: Register containing the interrupt status values.
>>   * @tmu_intclear: Register for clearing the raised interrupt status.
>> + * @intclr_fall_shift: shift bits for interrupt clear fall 0
>>   * @emul_con: TMU emulation controller register.
>>   * @emul_temp_shift: shift bits of emulation temperature.
>>   * @emul_time_shift: shift bits of emulation time.
>> @@ -207,6 +208,7 @@ struct exynos_tmu_registers {
>>       u32     tmu_intstat;
>>
>>       u32     tmu_intclear;
>> +     u32     intclr_fall_shift;
>>
>>       u32     emul_con;
>>       u32     emul_temp_shift;
>> diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
>> index 073c292..09a8a27 100644
>> --- a/drivers/thermal/samsung/exynos_tmu_data.c
>> +++ b/drivers/thermal/samsung/exynos_tmu_data.c
>> @@ -123,6 +123,7 @@ static const struct exynos_tmu_registers exynos4412_tmu_registers = {
>>       .inten_fall0_shift = EXYNOS_TMU_INTEN_FALL0_SHIFT,
>>       .tmu_intstat = EXYNOS_TMU_REG_INTSTAT,
>>       .tmu_intclear = EXYNOS_TMU_REG_INTCLEAR,
>> +     .intclr_fall_shift = EXYNOS5250_TMU_CLEAR_FALL_INT_SHIFT,
>>       .emul_con = EXYNOS_EMUL_CON,
>>       .emul_temp_shift = EXYNOS_EMUL_DATA_SHIFT,
>>       .emul_time_shift = EXYNOS_EMUL_TIME_SHIFT,
>> @@ -228,6 +229,7 @@ static const struct exynos_tmu_registers exynos5440_tmu_registers = {
>>       .inten_fall0_shift = EXYNOS5440_TMU_INTEN_FALL0_SHIFT,
>>       .tmu_intstat = EXYNOS5440_TMU_S0_7_IRQ,
>>       .tmu_intclear = EXYNOS5440_TMU_S0_7_IRQ,
>> +     .intclr_fall_shift = EXYNOS5440_TMU_CLEAR_FALL_INT_SHIFT,
>>       .tmu_irqstatus = EXYNOS5440_TMU_IRQ_STATUS,
>>       .emul_con = EXYNOS5440_TMU_S0_7_DEBUG,
>>       .emul_temp_shift = EXYNOS_EMUL_DATA_SHIFT,
>> diff --git a/drivers/thermal/samsung/exynos_tmu_data.h b/drivers/thermal/samsung/exynos_tmu_data.h
>> index a1ea19d..9c1e2c8 100644
>> --- a/drivers/thermal/samsung/exynos_tmu_data.h
>> +++ b/drivers/thermal/samsung/exynos_tmu_data.h
>> @@ -69,9 +69,11 @@
>>  #define EXYNOS_TMU_RISE_INT_MASK     0x111
>>  #define EXYNOS_TMU_RISE_INT_SHIFT    0
>>  #define EXYNOS_TMU_FALL_INT_MASK     0x111
>> -#define EXYNOS_TMU_FALL_INT_SHIFT    12
>> +#define EXYNOS_TMU_FALL_INT_SHIFT    16
>>  #define EXYNOS_TMU_CLEAR_RISE_INT    0x111
>>  #define EXYNOS_TMU_CLEAR_FALL_INT    (0x111 << 12)
>> +#define EXYNOS5250_TMU_CLEAR_FALL_INT_SHIFT  12
>
> The better name would be EXYNOS_TMU_CLEAR_FALL_INT_SHIFT because it is
> also used on EXYNOS4412.
Okey will do that,
>
> Also in patch #3 you should define EXYNOS5420_TMU_CLEAR_FALL_INT_SHIFT
> instead of re-using EXYNOS_TMU_FALL_INT_SHIFT.
Exynos5440 has so will make for exynos5420 aswell
>
> Finally please remove no longer used inten_fall_shift field and related
inten_fall_shift is not used will remove
> defines (EXYNOS_TMU_FALL_INT_MASK and EXYNOS5440_TMU_FALL_INT_MASK).
These macros are used for inten_fall_shift which is used at
drivers/thermal/samsung/exynos_tmu.c:273:
(reg->inten_fall_mask << reg->intclr_fall_shift),

>
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
>
>> +#define EXYNOS5440_TMU_CLEAR_FALL_INT_SHIFT  4
>>  #define EXYNOS_TMU_TRIP_MODE_SHIFT   13
>>  #define EXYNOS_TMU_TRIP_MODE_MASK    0x7
>>  #define EXYNOS_TMU_THERM_TRIP_EN_SHIFT       12
>
Will repost soon.



-- 
Shine bright,
(: Nav :)
--
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