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

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Date:   Wed, 26 Jul 2023 16:13:28 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Richard Fitzgerald <rf@...nsource.cirrus.com>, rafael@...nel.org,
        lenb@...nel.org, markgross@...nel.org
Cc:     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

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 ?

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 },