linux-kernel - Re: [PATCH] hwmon: (peci/cputemp) Add Intel Sapphire Rapids support

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Message-ID: <1f4c500b-e706-a090-516d-992b68f44f0d@roeck-us.net>
Date:   Mon, 10 Jul 2023 10:43:01 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Naresh Solanki <naresh.solanki@...ements.com>,
        devicetree@...r.kernel.org, Jean Delvare <jdelvare@...e.com>,
        Iwona Winiarska <iwona.winiarska@...el.com>
Cc:     linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org,
        Patrick Rudolph <patrick.rudolph@...ements.com>,
        openbmc@...ts.ozlabs.org
Subject: Re: [PATCH] hwmon: (peci/cputemp) Add Intel Sapphire Rapids support

On 7/10/23 09:27, Naresh Solanki wrote:
> From: Patrick Rudolph <patrick.rudolph@...ements.com>
> 
> Add support to read DTS for reading Intel Sapphire Rapids platform.
> 
> Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>

This patch touches code outside the hwmon subsystem, so I won't be able
to apply it without Ack from a maintainer.

Guenter

> ---
>   drivers/hwmon/peci/cputemp.c | 18 ++++++++++++++++++
>   drivers/peci/cpu.c           |  5 +++++
>   2 files changed, 23 insertions(+)
> 
> diff --git a/drivers/hwmon/peci/cputemp.c b/drivers/hwmon/peci/cputemp.c
> index e5b65a382772..a812c15948d9 100644
> --- a/drivers/hwmon/peci/cputemp.c
> +++ b/drivers/hwmon/peci/cputemp.c
> @@ -363,6 +363,7 @@ static int init_core_mask(struct peci_cputemp *priv)
>   	switch (peci_dev->info.model) {
>   	case INTEL_FAM6_ICELAKE_X:
>   	case INTEL_FAM6_ICELAKE_D:
> +	case INTEL_FAM6_SAPPHIRERAPIDS_X:
>   		ret = peci_ep_pci_local_read(peci_dev, 0, reg->bus, reg->dev,
>   					     reg->func, reg->offset + 4, &data);
>   		if (ret)
> @@ -531,6 +532,13 @@ static struct resolved_cores_reg resolved_cores_reg_icx = {
>   	.offset = 0xd0,
>   };
>   
> +static struct resolved_cores_reg resolved_cores_reg_spr = {
> +	.bus = 31,
> +	.dev = 30,
> +	.func = 6,
> +	.offset = 0x80,
> +};
> +
>   static const struct cpu_info cpu_hsx = {
>   	.reg		= &resolved_cores_reg_hsx,
>   	.min_peci_revision = 0x33,
> @@ -549,6 +557,12 @@ static const struct cpu_info cpu_icx = {
>   	.thermal_margin_to_millidegree = &dts_ten_dot_six_to_millidegree,
>   };
>   
> +static const struct cpu_info cpu_spr = {
> +	.reg		= &resolved_cores_reg_spr,
> +	.min_peci_revision = 0x40,
> +	.thermal_margin_to_millidegree = &dts_ten_dot_six_to_millidegree,
> +};
> +
>   static const struct auxiliary_device_id peci_cputemp_ids[] = {
>   	{
>   		.name = "peci_cpu.cputemp.hsx",
> @@ -574,6 +588,10 @@ static const struct auxiliary_device_id peci_cputemp_ids[] = {
>   		.name = "peci_cpu.cputemp.icxd",
>   		.driver_data = (kernel_ulong_t)&cpu_icx,
>   	},
> +	{
> +		.name = "peci_cpu.cputemp.spr",
> +		.driver_data = (kernel_ulong_t)&cpu_spr,
> +	},
>   	{ }
>   };
>   MODULE_DEVICE_TABLE(auxiliary, peci_cputemp_ids);
> diff --git a/drivers/peci/cpu.c b/drivers/peci/cpu.c
> index de4a7b3e5966..3668a908d259 100644
> --- a/drivers/peci/cpu.c
> +++ b/drivers/peci/cpu.c
> @@ -318,6 +318,11 @@ static const struct peci_device_id peci_cpu_device_ids[] = {
>   		.model	= INTEL_FAM6_ICELAKE_X,
>   		.data	= "icx",
>   	},
> +	{ /* Sapphire Rapids Xeon */
> +		.family	= 6,
> +		.model	= INTEL_FAM6_SAPPHIRERAPIDS_X,
> +		.data	= "spr",
> +	},
>   	{ /* Icelake Xeon D */
>   		.family	= 6,
>   		.model	= INTEL_FAM6_ICELAKE_D,
> 
> base-commit: 4dbbaf8fbdbd13adc80731b2452257857e4c2d8b