linux-kernel - Re: [PATCH] thermal: intel_pch_thermal: Add PCI ids for Lewisburg PCH.

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Date:   Thu, 16 Jan 2020 05:53:13 -0800
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     Andres Freund <andres@...razel.de>,
        Tushar Dave <tushar.n.dave@...el.com>,
        Zhang Rui <rui.zhang@...el.com>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] thermal: intel_pch_thermal: Add PCI ids for Lewisburg
 PCH.

On Wed, 2020-01-15 at 10:44 -0800, Andres Freund wrote:
> I noticed that I couldn't read the PCH temperature on my workstation
> (C620 series chipset, w/ 2x Xeon Gold 5215 CPUs) directly, but had to
> go
> through IPMI. Looking at the data sheet, it looks to me like the
> existing intel PCH thermal driver should work without changes for
> Lewisburg.
Does the temperature reading match with what you read via IPMI?

The patch looks fine to me otherwise.

Thanks,
Srinivas

> 
> I suspect there's some other PCI id's missing. But I hope somebody at
> Intel would have an easier time figuring that out than I...
> 
> Signed-off-by: Andres Freund <andres@...razel.de>
> ---
>  drivers/thermal/intel/intel_pch_thermal.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/thermal/intel/intel_pch_thermal.c
> b/drivers/thermal/intel/intel_pch_thermal.c
> index 4f0bb8f502e1..1f3ff0d489ef 100644
> --- a/drivers/thermal/intel/intel_pch_thermal.c
> +++ b/drivers/thermal/intel/intel_pch_thermal.c
> @@ -23,6 +23,7 @@
>  #define PCH_THERMAL_DID_SKL_H	0xA131 /* Skylake PCH 100
> series */
>  #define PCH_THERMAL_DID_CNL	0x9Df9 /* CNL PCH */
>  #define PCH_THERMAL_DID_CNL_H	0xA379 /* CNL-H PCH */
> +#define PCH_THERMAL_DID_LWB	0xA1B1 /* Lewisburg PCH */
>  
>  /* Wildcat Point-LP  PCH Thermal registers */
>  #define WPT_TEMP	0x0000	/* Temperature */
> @@ -272,6 +273,7 @@ enum board_ids {
>  	board_wpt,
>  	board_skl,
>  	board_cnl,
> +	board_lwb,
>  };
>  
>  static const struct board_info {
> @@ -294,6 +296,10 @@ static const struct board_info {
>  		.name = "pch_cannonlake",
>  		.ops = &pch_dev_ops_wpt,
>  	},
> +	[board_lwb] = {
> +		.name = "pch_lewisburg",
> +		.ops = &pch_dev_ops_wpt,
> +	},
>  };
>  
>  static int intel_pch_thermal_probe(struct pci_dev *pdev,
> @@ -398,6 +404,8 @@ static const struct pci_device_id
> intel_pch_thermal_id[] = {
>  		.driver_data = board_cnl, },
>  	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL_H),
>  		.driver_data = board_cnl, },
> +	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_LWB),
> +		.driver_data = board_lwb, },
>  	{ 0, },
>  };
>  MODULE_DEVICE_TABLE(pci, intel_pch_thermal_id);