linux-kernel - Re: [PATCH v1 2/2] leds: add aw20xx driver

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Message-ID: <cb9e8610-588e-6e56-ee33-8716008e7905@sberdevices.ru>
Date:   Mon, 28 Nov 2022 17:45:22 +0000
From:   Martin Kurbanov <MMKurbanov@...rdevices.ru>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jonathan Corbet <corbet@....net>,
        "Andy Shevchenko" <andy.shevchenko@...il.com>
CC:     "linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        kernel <kernel@...rdevices.ru>
Subject: Re: [PATCH v1 2/2] leds: add aw20xx driver

On 25.11.2022 11:19, Krzysztof Kozlowski wrote:
>> +    $ ls -l /sys/bus/i2c/devices/xxxx/pattern0/
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 clear_leds
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 fall_time
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 loop_begin
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 loop_end_on
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 max_breathing_level
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 min_breathing_level
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 mode
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 off_time
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 on_time
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 ramp
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 repeat
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 rise_time
>> +    -r--r--r--    1 root     root          4096 Jan  1 00:00 running
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 select_leds
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 start
>> +    -rw-r--r--    1 root     root          4096 Jan  1 00:00 toggle
> 
> sysfs documentation goes to Documentation/ABI/

Should I add it to Documentation/ABI/testing/sysfs-class-led-driver-aw200xx?
Is my understanding correct?
Is KernelVersion parameter required?


>> +	chip = devm_kzalloc(&client->dev,
>> +			    struct_size(chip, leds, count),
> 
> sizeof(*chip)

Unfortunately, it will not work. Because I want to calculate the whole
size of chip structure, it has flexible array member inside.

-- 
Best Regards,
Kurbanov Martin