linux-kernel - Re: [PATCH v3] ACPI: scan: Create platform device for CS35L56

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Date:   Mon, 31 Jul 2023 16:09:22 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Richard Fitzgerald <rf@...nsource.cirrus.com>, rafael@...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 v3] ACPI: scan: Create platform device for CS35L56

Hi,

On 7/28/23 13:13, 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.
> 
> There can be a 5th I2cSerialBusV2, but this is an alias address and doesn't
> represent a real device. Ignore this by having a dummy 5th entry in the
> serial-multi-instantiate instance list with the name of a non-existent
> driver, on the same pattern as done for bsg2150.
> 
> Signed-off-by: Simon Trimmer <simont@...nsource.cirrus.com>
> Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>

Thank you for your patch, I've applied this patch to my fixes
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=fixes

Note it will show up in my fixes branch once I've pushed my
local branch there, which might take a while.

I will include this patch in my next fixes pull-req to Linus
for the current kernel development cycle.

Regards,

Hans




> ---
>  drivers/acpi/scan.c                             |  1 +
>  drivers/platform/x86/serial-multi-instantiate.c | 14 ++++++++++++++
>  2 files changed, 15 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 2c2abf69f049..8158e3cf5d6d 100644
> --- a/drivers/platform/x86/serial-multi-instantiate.c
> +++ b/drivers/platform/x86/serial-multi-instantiate.c
> @@ -329,6 +329,19 @@ static const struct smi_node cs35l41_hda = {
>  	.bus_type = SMI_AUTO_DETECT,
>  };
>  
> +static const struct smi_node cs35l56_hda = {
> +	.instances = {
> +		{ "cs35l56-hda", IRQ_RESOURCE_AUTO, 0 },
> +		{ "cs35l56-hda", IRQ_RESOURCE_AUTO, 0 },
> +		{ "cs35l56-hda", IRQ_RESOURCE_AUTO, 0 },
> +		{ "cs35l56-hda", IRQ_RESOURCE_AUTO, 0 },
> +		/* a 5th entry is an alias address, not a real device */
> +		{ "cs35l56-hda_dummy_dev" },
> +		{}
> +	},
> +	.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().
> @@ -337,6 +350,7 @@ 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 },