linux-kernel - Re: [PATCH 1/3] dt-bindings: iio: stm32-adc: add support for STM32MP1.

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Message-ID: <ee92eb8d-9675-3c94-1c0d-f6e8f091d878@st.com>
Date:   Wed, 25 Apr 2018 09:22:02 +0200
From:   Fabrice Gasnier <fabrice.gasnier@...com>
To:     Rob Herring <robh@...nel.org>
CC:     <jic23@...nel.org>, <alexandre.torgue@...com>,
        <mark.rutland@....com>, <mcoquelin.stm32@...il.com>,
        <lars@...afoo.de>, <knaack.h@....de>, <pmeerw@...erw.net>,
        <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <benjamin.gaignard@...aro.org>
Subject: Re: [PATCH 1/3] dt-bindings: iio: stm32-adc: add support for
 STM32MP1.

On 04/24/2018 06:27 PM, Rob Herring wrote:
> On Wed, Apr 18, 2018 at 05:37:52PM +0200, Fabrice Gasnier wrote:
>> Document support for STM32MP1 ADC. It's quite similar to STM32H7 ADC.
>> Introduce "st,stm32mp1-adc" compatible to handle variants of this
>> hardware such as vregready flag, interrupts, clock rate.
>>
>> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@...com>
>> ---
>>  Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt | 6 +++++-
>>  1 file changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
>> index e8bb824..9994384 100644
>> --- a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
>> +++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
>> @@ -24,8 +24,11 @@ Required properties:
>>  - compatible: Should be one of:
>>    "st,stm32f4-adc-core"
>>    "st,stm32h7-adc-core"
>> +  "st,stm32mp1-adc-core"
>>  - reg: Offset and length of the ADC block register set.
>> -- interrupts: Must contain the interrupt for ADC block.
>> +- interrupts: One or more interrupts for ADC block. Some parts like stm32f4
>> +  and stm32h7 share a common ADC interrupt line. stm32mp1 has separate
>> +  lines for each ADC within ADC block.
> 
> How many interrupt lines is that?

Hi Rob, Jonathan,

I should have mentioned this: stm32mp1 has two separate interrupt lines
for each ADC within ADC block.

Do you wish I send a V2 for this ? Or a patch to fix this ?

Please let me know,
BR,
Fabrice

> 
>>  - clocks: Core can use up to two clocks, depending on part used:
>>    - "adc" clock: for the analog circuitry, common to all ADCs.
>>      It's required on stm32f4.
>> @@ -53,6 +56,7 @@ Required properties:
>>  - compatible: Should be one of:
>>    "st,stm32f4-adc"
>>    "st,stm32h7-adc"
>> +  "st,stm32mp1-adc"
>>  - reg: Offset of ADC instance in ADC block (e.g. may be 0x0, 0x100, 0x200).
>>  - clocks: Input clock private to this ADC instance. It's required only on
>>    stm32f4, that has per instance clock input for registers access.
>> -- 
>> 1.9.1
>>