[PATCH v2] hwmon: (k10temp) Add per-CCD temperature monitoring for Zen5 Turin

[PATCH v2] hwmon: (k10temp) Add per-CCD temperature monitoring for Zen5 Turin

[Gabriel Ford]

Add support for per-CCD temperature monitoring on Zen 5 Turin (EPYC 9005)
CPUs, as they fall into a separate model range with a different offset
and a higher maximum CCD count than their desktop counterparts. As such,
this patch also updates the driver to support CPUs with up to 16 CCDs.
Tested and working on an EPYC 9555P.

Signed-off-by: Gabriel Ford <gabriel@gford.dev>
---
 drivers/hwmon/k10temp.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/hwmon/k10temp.c b/drivers/hwmon/k10temp.c
index de0760dc597d..43cade8c3631 100644
--- a/drivers/hwmon/k10temp.c
+++ b/drivers/hwmon/k10temp.c
@@ -207,6 +207,10 @@ static const char *k10temp_temp_label[] = {
 	"Tccd10",
 	"Tccd11",
 	"Tccd12",
+	"Tccd13",
+	"Tccd14",
+	"Tccd15",
+	"Tccd16",
 };
 
 static int k10temp_read_labels(struct device *dev,
@@ -243,7 +247,7 @@ static int k10temp_read_temp(struct device *dev, u32 attr, int channel,
 			if (*val < 0 && !data->disp_negative)
 				*val = 0;
 			break;
-		case 2 ... 13:		/* Tccd{1-12} */
+		case 2 ... 17:		/* Tccd{1-16} */
 			ret = read_ccd_temp_reg(data, channel - 2, &regval);
 
 			if (ret)
@@ -384,7 +388,11 @@ static const struct hwmon_channel_info * const k10temp_info[] = {
 			   HWMON_T_INPUT | HWMON_T_LABEL,
 			   HWMON_T_INPUT | HWMON_T_LABEL,
 			   HWMON_T_INPUT | HWMON_T_LABEL,
-			   HWMON_T_INPUT | HWMON_T_LABEL),
+			   HWMON_T_INPUT | HWMON_T_LABEL,
+			   HWMON_T_INPUT | HWMON_T_LABEL,
+			   HWMON_T_INPUT | HWMON_T_LABEL,
+			   HWMON_T_INPUT | HWMON_T_LABEL,
+			   HWMON_T_INPUT | HWMON_T_LABEL),
 	NULL
 };
 
@@ -515,6 +523,10 @@ static int k10temp_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		}
 	} else if (boot_cpu_data.x86 == 0x1a) {
 		switch (boot_cpu_data.x86_model) {
+		case 0x00 ... 0x2f:	/* Zen5 Turin */
+			data->ccd_offset = 0x1F0;
+			k10temp_get_ccd_support(data, 16);
+			break;
 		case 0x40 ... 0x4f:	/* Zen5 Ryzen Desktop */
 			data->ccd_offset = 0x308;
 			k10temp_get_ccd_support(data, 8);
-- 
2.43.0

Re: [PATCH v2] hwmon: (k10temp) Add per-CCD temperature monitoring for Zen5 Turin

[sashiko-bot]

> Add support for per-CCD temperature monitoring on Zen 5 Turin (EPYC 9005)
> CPUs, as they fall into a separate model range with a different offset
> and a higher maximum CCD count than their desktop counterparts. As such,
> this patch also updates the driver to support CPUs with up to 16 CCDs.
> Tested and working on an EPYC 9555P.
> 
> Signed-off-by: Gabriel Ford <gabriel@gford.dev>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260813170232.3841-1-gabriel@gford.dev?part=1

Re: [PATCH v2] hwmon: (k10temp) Add per-CCD temperature monitoring for Zen5 Turin

[Guenter Roeck]

On Thu, Aug 13, 2026 at 05:02:08PM +0000, Gabriel Ford wrote:
> Add support for per-CCD temperature monitoring on Zen 5 Turin (EPYC 9005)
> CPUs, as they fall into a separate model range with a different offset
> and a higher maximum CCD count than their desktop counterparts. As such,
> this patch also updates the driver to support CPUs with up to 16 CCDs.
> Tested and working on an EPYC 9555P.
> 
> Signed-off-by: Gabriel Ford <gabriel@gford.dev>

Seems safe enough. Applied.

> ---
For next time: change log goes here.

Thanks,
Guenter

>  drivers/hwmon/k10temp.c | 16 ++++++++++++++--
>  1 file changed, 14 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/hwmon/k10temp.c b/drivers/hwmon/k10temp.c
> index de0760dc597d..43cade8c3631 100644
> --- a/drivers/hwmon/k10temp.c
> +++ b/drivers/hwmon/k10temp.c
> @@ -207,6 +207,10 @@ static const char *k10temp_temp_label[] = {
>  	"Tccd10",
>  	"Tccd11",
>  	"Tccd12",
> +	"Tccd13",
> +	"Tccd14",
> +	"Tccd15",
> +	"Tccd16",
>  };
>  
>  static int k10temp_read_labels(struct device *dev,
> @@ -243,7 +247,7 @@ static int k10temp_read_temp(struct device *dev, u32 attr, int channel,
>  			if (*val < 0 && !data->disp_negative)
>  				*val = 0;
>  			break;
> -		case 2 ... 13:		/* Tccd{1-12} */
> +		case 2 ... 17:		/* Tccd{1-16} */
>  			ret = read_ccd_temp_reg(data, channel - 2, &regval);
>  
>  			if (ret)
> @@ -384,7 +388,11 @@ static const struct hwmon_channel_info * const k10temp_info[] = {
>  			   HWMON_T_INPUT | HWMON_T_LABEL,
>  			   HWMON_T_INPUT | HWMON_T_LABEL,
>  			   HWMON_T_INPUT | HWMON_T_LABEL,
> -			   HWMON_T_INPUT | HWMON_T_LABEL),
> +			   HWMON_T_INPUT | HWMON_T_LABEL,
> +			   HWMON_T_INPUT | HWMON_T_LABEL,
> +			   HWMON_T_INPUT | HWMON_T_LABEL,
> +			   HWMON_T_INPUT | HWMON_T_LABEL,
> +			   HWMON_T_INPUT | HWMON_T_LABEL),
>  	NULL
>  };
>  
> @@ -515,6 +523,10 @@ static int k10temp_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>  		}
>  	} else if (boot_cpu_data.x86 == 0x1a) {
>  		switch (boot_cpu_data.x86_model) {
> +		case 0x00 ... 0x2f:	/* Zen5 Turin */
> +			data->ccd_offset = 0x1F0;
> +			k10temp_get_ccd_support(data, 16);
> +			break;
>  		case 0x40 ... 0x4f:	/* Zen5 Ryzen Desktop */
>  			data->ccd_offset = 0x308;
>  			k10temp_get_ccd_support(data, 8);