linux-kernel - Re: [PATCH v6 08/10] ACPI / scan: Create platform device for CLSA0100 and CSC3551 ACPI nodes

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Message-ID: <4b5506b1-20c6-3983-d541-86dc2388b2a7@redhat.com>
Date:   Fri, 17 Dec 2021 19:26:51 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Lucas Tanure <tanureal@...nsource.cirrus.com>,
        Stefan Binding <sbinding@...nsource.cirrus.com>
Cc:     Len Brown <lenb@...nel.org>, Mark Gross <markgross@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.com>,
        "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@...a-project.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        patches@...nsource.cirrus.com,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 08/10] ACPI / scan: Create platform device for CLSA0100
 and CSC3551 ACPI nodes

Hi,

On 12/17/21 18:19, Rafael J. Wysocki wrote:
> On Fri, Dec 17, 2021 at 12:57 PM Lucas Tanure
> <tanureal@...nsource.cirrus.com> wrote:
>>
>> The ACPI device with CLSA0100 or CSC3551 is a sound card
>> with multiple instances of CS35L41 connectec by I2C to
> 
> "connected" I suppose?
> 
>> the main CPU.
>>
>> We add an ID to the i2c_multi_instantiate_ids list to enumerate
>> all I2C slaves correctly.
>>
>> Signed-off-by: Lucas Tanure <tanureal@...nsource.cirrus.com>
> 
> This requires an ACK from Hans.
> 
> If you receive one, please feel free to add my ACK to it too.

One problem which I see here is that this change conflicts with
this series:

https://lore.kernel.org/all/20211210154050.3713-1-sbinding@opensource.cirrus.com/

I have reviewing that series on my todo list.

One interesting question for you (Rafael) about that series is
that i2c-multi-instantiate.c, which after the series also handles
spi devices,is being moved to drivers/acpi .

This is fine with me, but I wonder if it would not be better
to keep it under drivers/platform/x86 ? Since the new SPI
use-cases are also all on x86 laptops AFAICT.

But back to this series, as said the 2 series conflict, since
both are being submitted by @opensource.cirrus.com people,
it would be good if the Cirrus folks can decide in which
order these series should be merged.

It might be best to just move this one patch to the other series?
Thus removing the conflict between the 2 series.

Regards,

Hans



>> ---
>>  drivers/acpi/scan.c                          |  3 +++
>>  drivers/platform/x86/i2c-multi-instantiate.c | 11 +++++++++++
>>  2 files changed, 14 insertions(+)
>>
>> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
>> index b7a6b982226e..8740cfa11f59 100644
>> --- a/drivers/acpi/scan.c
>> +++ b/drivers/acpi/scan.c
>> @@ -1712,8 +1712,11 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
>>         static const struct acpi_device_id i2c_multi_instantiate_ids[] = {
>>                 {"BSG1160", },
>>                 {"BSG2150", },
>> +               {"CSC3551", },
>>                 {"INT33FE", },
>>                 {"INT3515", },
>> +               /* Non-conforming _HID for Cirrus Logic already released */
>> +               {"CLSA0100", },
>>                 {}
>>         };
>>
>> diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c
>> index 4956a1df5b90..a889789b966c 100644
>> --- a/drivers/platform/x86/i2c-multi-instantiate.c
>> +++ b/drivers/platform/x86/i2c-multi-instantiate.c
>> @@ -147,6 +147,14 @@ static const struct i2c_inst_data int3515_data[]  = {
>>         {}
>>  };
>>
>> +static const struct i2c_inst_data cs35l41_hda[] = {
>> +       { "cs35l41-hda", IRQ_RESOURCE_GPIO, 0 },
>> +       { "cs35l41-hda", IRQ_RESOURCE_GPIO, 0 },
>> +       { "cs35l41-hda", IRQ_RESOURCE_GPIO, 0 },
>> +       { "cs35l41-hda", IRQ_RESOURCE_GPIO, 0 },
>> +       {}
>> +};
>> +
>>  /*
>>   * Note new device-ids must also be added to i2c_multi_instantiate_ids in
>>   * drivers/acpi/scan.c: acpi_device_enumeration_by_parent().
>> @@ -154,7 +162,10 @@ static const struct i2c_inst_data int3515_data[]  = {
>>  static const struct acpi_device_id i2c_multi_inst_acpi_ids[] = {
>>         { "BSG1160", (unsigned long)bsg1160_data },
>>         { "BSG2150", (unsigned long)bsg2150_data },
>> +       { "CSC3551", (unsigned long)cs35l41_hda },
>>         { "INT3515", (unsigned long)int3515_data },
>> +       /* Non-conforming _HID for Cirrus Logic already released */
>> +       { "CLSA0100", (unsigned long)cs35l41_hda },
>>         { }
>>  };
>>  MODULE_DEVICE_TABLE(acpi, i2c_multi_inst_acpi_ids);
>> --
>> 2.34.1
>>
>