linux-kernel - Re: [PATCH] ACPI: scan: Create platform device for CS35L56

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Date:   Wed, 26 Jul 2023 20:34:13 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Richard Fitzgerald <rf@...nsource.cirrus.com>, rafael@...nel.org,
        lenb@...nel.org, markgross@...nel.org, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        patches@...nsource.cirrus.com,
        Simon Trimmer <simont@...nsource.cirrus.com>
Subject: Re: [PATCH] ACPI: scan: Create platform device for CS35L56

On Wed, Jul 26, 2023 at 4:13 PM Hans de Goede <hdegoede@...hat.com> wrote:
>
> Hi Richard,
>
> On 7/26/23 13:27, Richard Fitzgerald wrote:
> > From: Simon Trimmer <simont@...nsource.cirrus.com>
> >
> > The ACPI device CSC3556 is a Cirrus Logic CS35L56 mono amplifier which
> > is used in multiples, and can be connected either to I2C or SPI.
> >
> > There will be multiple instances under the same Device() node. Add it
> > to ignore_serial_bus_ids and handle it in the serial-multi-instantiate
> > driver.
> >
> > Signed-off-by: Simon Trimmer <simont@...nsource.cirrus.com>
> > Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
>
> Thanks, patch looks good to me:
>
> Reviewed-by: Hans de Goede <hdegoede@...hat.com>
>
> I have 1 other serial-multi-instantiate.c patches in my fixes branch (see below) and since this just adds new hw-ids I think this can go upstream through my fixes branch too.
>
> Rafael, do you agree with me taking this upstream as a 6.5 fix? And if yes may I have your ack for that ?

Sure.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

> About that 1 patch, that adds a new IRQ type: IRQ_RESOURCE_AUTO and I wonder if this patch should not use that same new type right from the start:
>
> https://git.kernel.org/pub/scm/linux/kernel/agit/pdx86/platform-drivers-x86.git/commit/?h=fixes&id=676b7c5ecab36274442887ceadd6dee8248a244f
>
> This makes me realize that I should probably have pinged you and ask for feedback on that patch since it was send by a community member rather then by Cirrus. Note this is currently in Linus' master tree, so any fixes to it need to be submitted on top (not that I expect any issues since it still behaves as before on acpi_dev_gpio_irq_get() success and only adds an platform_get_irq() fallback when that fails).
>
> Regards,
>
> Hans
>
>
>
> > ---
> >  drivers/acpi/scan.c                             |  1 +
> >  drivers/platform/x86/serial-multi-instantiate.c | 12 ++++++++++++
> >  2 files changed, 13 insertions(+)
> >
> > diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> > index 5b145f1aaa1b..87e385542576 100644
> > --- a/drivers/acpi/scan.c
> > +++ b/drivers/acpi/scan.c
> > @@ -1714,6 +1714,7 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
> >               {"BSG1160", },
> >               {"BSG2150", },
> >               {"CSC3551", },
> > +             {"CSC3556", },
> >               {"INT33FE", },
> >               {"INT3515", },
> >               /* Non-conforming _HID for Cirrus Logic already released */
> > diff --git a/drivers/platform/x86/serial-multi-instantiate.c b/drivers/platform/x86/serial-multi-instantiate.c
> > index f3dcbdd72fec..dcf2914b97c9 100644
> > --- a/drivers/platform/x86/serial-multi-instantiate.c
> > +++ b/drivers/platform/x86/serial-multi-instantiate.c
> > @@ -316,6 +316,17 @@ static const struct smi_node cs35l41_hda = {
> >       .bus_type = SMI_AUTO_DETECT,
> >  };
> >
> > +static const struct smi_node cs35l56_hda = {
> > +     .instances = {
> > +             { "cs35l56-hda", IRQ_RESOURCE_GPIO, 0 },
> > +             { "cs35l56-hda", IRQ_RESOURCE_GPIO, 0 },
> > +             { "cs35l56-hda", IRQ_RESOURCE_GPIO, 0 },
> > +             { "cs35l56-hda", IRQ_RESOURCE_GPIO, 0 },
> > +             {}
> > +     },
> > +     .bus_type = SMI_AUTO_DETECT,
> > +};
> > +
> >  /*
> >   * Note new device-ids must also be added to ignore_serial_bus_ids in
> >   * drivers/acpi/scan.c: acpi_device_enumeration_by_parent().
> > @@ -324,6 +335,7 @@ static const struct acpi_device_id smi_acpi_ids[] = {
> >       { "BSG1160", (unsigned long)&bsg1160_data },
> >       { "BSG2150", (unsigned long)&bsg2150_data },
> >       { "CSC3551", (unsigned long)&cs35l41_hda },
> > +     { "CSC3556", (unsigned long)&cs35l56_hda },
> >       { "INT3515", (unsigned long)&int3515_data },
> >       /* Non-conforming _HID for Cirrus Logic already released */
> >       { "CLSA0100", (unsigned long)&cs35l41_hda },
>