linux-kernel - Re: [PATCH v1] ACPI: APD: Add AMDI0015 as platform device

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Message-ID: <7c550151-39a8-4155-ae9e-4796d9463cd4@amd.com>
Date: Fri, 9 Aug 2024 21:08:22 +0530
From: Shyam Sundar S K <Shyam-sundar.S-k@....com>
To: rafael@...nel.org, lenb@...nel.org,
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
 Sanket Goswami <Sanket.Goswami@....com>
Subject: Re: [PATCH v1] ACPI: APD: Add AMDI0015 as platform device

+Andy

On 7/18/2024 20:53, Shyam Sundar S K wrote:
> Add AMDI0015 to the ACPI APD support list to ensure correct clock settings
> for the I3C device on the latest AMD platforms.
> 
> Signed-off-by: Sanket Goswami <Sanket.Goswami@....com>
> Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@....com>
> ---
>  drivers/acpi/acpi_apd.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
> index 80f945cbec8a..6c502268879e 100644
> --- a/drivers/acpi/acpi_apd.c
> +++ b/drivers/acpi/acpi_apd.c
> @@ -118,6 +118,11 @@ static const struct apd_device_desc wt_i2c_desc = {
>  	.fixed_clk_rate = 150000000,
>  };
>  
> +static const struct apd_device_desc wt_i3c_desc = {
> +	.setup = acpi_apd_setup,
> +	.fixed_clk_rate = 125000000,
> +};
> +
>  static struct property_entry uart_properties[] = {
>  	PROPERTY_ENTRY_U32("reg-io-width", 4),
>  	PROPERTY_ENTRY_U32("reg-shift", 2),
> @@ -232,6 +237,7 @@ static const struct acpi_device_id acpi_apd_device_ids[] = {
>  	{ "AMD0040", APD_ADDR(fch_misc_desc)},
>  	{ "AMDI0010", APD_ADDR(wt_i2c_desc) },
>  	{ "AMDI0019", APD_ADDR(wt_i2c_desc) },
> +	{ "AMDI0015", APD_ADDR(wt_i3c_desc) },

FYI..

AMDI0015 is for MIPI I3C (we call it I3C legacy) version of the
implementation.

and.. MIPI0100 is for HCI based implementation of the MIPI I3C
Specification.

Thanks,
Shyam

>  	{ "AMDI0020", APD_ADDR(cz_uart_desc) },
>  	{ "AMDI0022", APD_ADDR(cz_uart_desc) },
>  	{ "HYGO0010", APD_ADDR(wt_i2c_desc) },