From bcd5120ad454c7c5824de1869dc76d62abe8dd0c Mon Sep 17 00:00:00 2001 From: Laveesh Bansal Date: Tue, 6 Jan 2026 15:54:26 +0000 Subject: [PATCH] hwmon: (coretemp) Add TjMax for Silvermont through Tremont Atoms Add fallback TjMax values for Intel Atom processors based on Silvermont, Airmont, Goldmont, and Tremont microarchitectures. These processors support MSR_IA32_TEMPERATURE_TARGET for reading TjMax directly, so these table entries serve as fallback values only when the MSR read fails (e.g., in some virtualization scenarios). Added processors and TjMax values: - INTEL_ATOM_SILVERMONT (0x37, Bay Trail): - Stepping 9 (E38xx embedded): 110C - Other steppings (Z37xx tablet): 90C Stepping identified from Intel E3800 Specification Update. - INTEL_ATOM_SILVERMONT_MID (0x4a, Merrifield): 90C - INTEL_ATOM_SILVERMONT_MID2 (0x5a, Moorefield): 90C - INTEL_ATOM_AIRMONT (0x4c, Cherry Trail): 90C - INTEL_ATOM_GOLDMONT (0x5c, Apollo Lake): 105C - INTEL_ATOM_GOLDMONT_PLUS (0x7a, Gemini Lake): 105C - INTEL_ATOM_TREMONT (0x96, Elkhart Lake): 105C - INTEL_ATOM_TREMONT_L (0x9c, Jasper Lake): 105C Not included (MSR reads work reliably, server/specialized chips): - INTEL_ATOM_SILVERMONT_D (Avoton): Server, Tcase 97C - INTEL_ATOM_GOLDMONT_D (Denverton): Server, Tcase 82C - INTEL_ATOM_AIRMONT_NP (Lightning Mountain): Network processor - INTEL_ATOM_TREMONT_D (Jacobsville): Server - INTEL_ATOM_GRACEMONT (Alder Lake-N): Very new, MSR works Reference: Intel datasheets and ARK processor specifications - Z3600/Z3700 datasheet: https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/atom-z36xxx-z37xxx-datasheet-vol-1.pdf - E3845 ARK: https://www.intel.com/content/www/us/en/products/sku/78475/intel-atom-processor-e3845-2m-cache-1-91-ghz/specifications.html - E3800 Spec Update: https://community.intel.com/cipcp26785/attachments/cipcp26785/embedded-atom-processors/4708/1/600834-329901-intel-atom-processor-e3800-product-family-su-rev015.pdf Signed-off-by: Laveesh Bansal Link: https://lore.kernel.org/r/20260106155426.547872-3-laveeshb@laveeshbansal.com Signed-off-by: Guenter Roeck --- drivers/hwmon/coretemp.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index ad79db5a183e0..d2dfa4e304074 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -145,6 +145,15 @@ static const struct tjmax_model tjmax_model_table[] = { * Also matches S12x0 (stepping 9), covered by * PCI table */ + { INTEL_ATOM_SILVERMONT, 9, 110000 }, /* Atom Bay Trail E38xx (embedded) */ + { INTEL_ATOM_SILVERMONT, ANY, 90000 }, /* Atom Bay Trail Z37xx (tablet) */ + { INTEL_ATOM_SILVERMONT_MID, ANY, 90000 }, /* Atom Merrifield (Z34xx) */ + { INTEL_ATOM_SILVERMONT_MID2, ANY, 90000 }, /* Atom Moorefield (Z35xx) */ + { INTEL_ATOM_AIRMONT, ANY, 90000 }, /* Atom Cherry Trail (Z8xxx) */ + { INTEL_ATOM_GOLDMONT, ANY, 105000 }, /* Atom Apollo Lake (J3xxx, N3xxx, E39xx) */ + { INTEL_ATOM_GOLDMONT_PLUS, ANY, 105000 }, /* Atom Gemini Lake (J4xxx, N4xxx, N5xxx) */ + { INTEL_ATOM_TREMONT, ANY, 105000 }, /* Atom Elkhart Lake */ + { INTEL_ATOM_TREMONT_L, ANY, 105000 }, /* Atom Jasper Lake */ }; static bool is_pkg_temp_data(struct temp_data *tdata) -- 2.47.3