linux-kernel - RE: [PATCH v2 2/3] iio: adc: exynos-adc: Add support for ADC FSD-HW controller

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Message-ID: <015b01d874ca$69aa8bb0$3cffa310$@samsung.com>
Date:   Tue, 31 May 2022 14:12:46 +0530
From:   "m.shams" <m.shams@...sung.com>
To:     "'Jonathan Cameron'" <jic23@...nel.org>
Cc:     <lars@...afoo.de>, <robh+dt@...nel.org>, <krzk+dt@...nel.org>,
        <geert@...ux-m68k.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-samsung-soc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-iio@...r.kernel.org>,
        <alim.akhtar@...sung.com>, <paul@...pouillou.net>,
        <linux-fsd@...la.com>
Subject: RE: [PATCH v2 2/3] iio: adc: exynos-adc: Add support for ADC FSD-HW
 controller


Hi Jonathan,

On Fri, 20 May 2022 20:28:19 +0530
Tamseel Shams <m.shams@...sung.com> wrote:

>> From: Alim Akhtar <alim.akhtar@...sung.com>
>> 
>> Exynos's ADC-FSD-HW has some difference in registers set, number of 
>> programmable channels (16 channel) etc. This patch adds support for 
>> ADC-FSD-HW controller version.
>> 
>> Signed-off-by: Alim Akhtar <alim.akhtar@...sung.com>
>> Signed-off-by: Tamseel Shams <m.shams@...sung.com>
>
> Hi,
>
> One suggestion inline, otherwise LGTM. Plenty of time to tidy this up as
this won't make the upcoming merge window - I'll be queuing it up for 5.20
>
> Thanks,
>
> Jonathan
>

Okay, Thanks for reviewing.

>> ---
>> - Changes since v1
>> * Addressed Jonathan's comment by using already provided isr handle
>> 
>>  drivers/iio/adc/exynos_adc.c | 55 
>> ++++++++++++++++++++++++++++++++++++
>>  1 file changed, 55 insertions(+)
>> 
>> diff --git a/drivers/iio/adc/exynos_adc.c 
>> b/drivers/iio/adc/exynos_adc.c index cff1ba57fb16..183ae591327a 100644
>> --- a/drivers/iio/adc/exynos_adc.c
>> +++ b/drivers/iio/adc/exynos_adc.c
>> @@ -55,6 +55,11 @@
>>  #define ADC_V2_INT_ST(x)	((x) + 0x14)
>>  #define ADC_V2_VER(x)		((x) + 0x20)
>>  
>> +/* ADC_FSD_HW register definitions */
>> +#define ADC_FSD_DAT(x)			((x) + 0x08)
>
> I mention this below, but these different register sets should be in the
struct exynos_adc_data to avoid the need for an if "compatible" == check on
each use of > them.
>

Can you clarify on how exactly you want me to add these register sets to
struct exynos_adc_data?
Do you mean just for these registers or other registers too which are
defined in this way only?


Thanks & Regards,
Tamseel Shams