linux-kernel - [PATCH 3/3] hwmon: (peci/cputemp) add Intel Emerald Rapids support

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Message-ID: <20251006215321.5036-4-fr0st61te@gmail.com>
Date: Tue,  7 Oct 2025 00:53:21 +0300
From: Ivan Mikhaylov <fr0st61te@...il.com>
To: Iwona Winiarska <iwona.winiarska@...el.com>,
	Guenter Roeck <linux@...ck-us.net>
Cc: linux-hwmon@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	openbmc@...ts.ozlabs.org,
	Ivan Mikhaylov <fr0st61te@...il.com>
Subject: [PATCH 3/3] hwmon: (peci/cputemp) add Intel Emerald Rapids support

Add support to read DTS for reading Intel Emerald Rapids platform.

Signed-off-by: Ivan Mikhaylov <fr0st61te@...il.com>
---
 drivers/hwmon/peci/cputemp.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/hwmon/peci/cputemp.c b/drivers/hwmon/peci/cputemp.c
index c7112dbf008b..b350c9a76894 100644
--- a/drivers/hwmon/peci/cputemp.c
+++ b/drivers/hwmon/peci/cputemp.c
@@ -364,6 +364,7 @@ static int init_core_mask(struct peci_cputemp *priv)
 	case INTEL_ICELAKE_X:
 	case INTEL_ICELAKE_D:
 	case INTEL_SAPPHIRERAPIDS_X:
+	case INTEL_EMERALDRAPIDS_X:
 		ret = peci_ep_pci_local_read(peci_dev, 0, reg->bus, reg->dev,
 					     reg->func, reg->offset + 4, &data);
 		if (ret)
@@ -539,6 +540,13 @@ static struct resolved_cores_reg resolved_cores_reg_spr = {
 	.offset = 0x80,
 };
 
+static struct resolved_cores_reg resolved_cores_reg_emr = {
+	.bus = 31,
+	.dev = 30,
+	.func = 6,
+	.offset = 0x80,
+};
+
 static const struct cpu_info cpu_hsx = {
 	.reg		= &resolved_cores_reg_hsx,
 	.min_peci_revision = 0x33,
@@ -563,6 +571,12 @@ static const struct cpu_info cpu_spr = {
 	.thermal_margin_to_millidegree = &dts_ten_dot_six_to_millidegree,
 };
 
+static const struct cpu_info cpu_emr = {
+	.reg    = &resolved_cores_reg_emr,
+	.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",
@@ -592,6 +606,10 @@ static const struct auxiliary_device_id peci_cputemp_ids[] = {
 		.name = "peci_cpu.cputemp.spr",
 		.driver_data = (kernel_ulong_t)&cpu_spr,
 	},
+	{
+		.name = "peci_cpu.cputemp.emr",
+		.driver_data = (kernel_ulong_t)&cpu_emr,
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(auxiliary, peci_cputemp_ids);
-- 
2.49.0