From 3833c9be6bd68b2053c40eecf42dadc5afd001d8 Mon Sep 17 00:00:00 2001
From: drath <drath@drath.cc>
Date: Sun, 10 May 2026 00:48:17 +0200
Subject: [PATCH] cpu ready?

---
 include/cpu.h |  3 +++
 src/cpu.c     | 73 ++++++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 73 insertions(+), 3 deletions(-)

diff --git a/include/cpu.h b/include/cpu.h
index f7ad5b6..1247bdb 100644
--- a/include/cpu.h
+++ b/include/cpu.h
@@ -24,4 +24,7 @@ struct cpu_sensors_t {
 	char hwmon[128];
 };
 
+void cpu_detect(struct cpu_sensors_t* t, const char* pci_dev);
+void cpu_update(struct cpu_sensors_t *c);
+
 #endif
diff --git a/src/cpu.c b/src/cpu.c
index 087385a..67e56bf 100644
--- a/src/cpu.c
+++ b/src/cpu.c
@@ -1,8 +1,75 @@
 #include "cpu.h"
+#include "utils.h"
+#include "log.h"
 
 #include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+
+void cpu_detect(struct cpu_sensors_t *t, const char *pci_dev) {
+	t->module = unknown;
+	t->num_cores = sysconf(_SC_NPROCESSORS_ONLN);
+
+	snprintf(t->hwmon, sizeof(t->hwmon), "/sys/bus/pci/devices/%s/hwmon", pci_dev);
+	const int ret = get_hwmon_dir(t->hwmon);
+	if (ret != 0) {
+		memset(t->hwmon, '\0', sizeof(t->hwmon));
+		applog(LOG_WRN, "Detected %d cores, module enum #%d. Can't get hwmon path, skipping", t->num_cores, t->module);
+		return;
+	}
+
+	char buf[128];
+	char *nt = stpncpy(buf, t->hwmon, sizeof(buf)); // nt is a pointer to the null terminator of the copied string
+	stpcpy(nt, "/in1_input"); // write at the null terminator address
+	t->module = file_exists(buf) ? zenpower : k10temp; // idk if this is reliable, we're trying to avoid just reading the name
+	applog(LOG_INF, "Detected %d cores, module enum #%d in path %s", t->num_cores, t->module, t->hwmon);
+}
+
+void cpu_update(struct cpu_sensors_t *c) {
+	static char buf[32];
+	struct energy_t {
+		struct timespec ts;
+		uint64_t energy;
+	};
+
+	static struct energy_t prev;
+	struct energy_t curr = {};
+
+	// read power from intel-rapl? works on amd too, btop uses this trick, seems accurate
+	// it tracks with "socket power" in hwinfo on windows, its actually the same thing i had in lcdsmartie
+	clock_gettime(CLOCK_MONOTONIC, &curr.ts);
+	fast_read_num_u64("/sys/class/powercap/intel-rapl:0", "energy_uj", buf, &curr.energy, 1);
+
+	c->ptotal = (float)(curr.energy - prev.energy) / (float)((curr.ts.tv_nsec - prev.ts.tv_nsec) / 1000);
+	prev = curr;
+
+	// lots of reads but still faster than reading /proc/cpuinfo
+	c->avg_freq = 0;
+	char p[128];
+	for (uint8_t i = 0; i < c->num_cores; i++) {
+		uint64_t t = 0;
+		sprintf(p, "/sys/devices/system/cpu/cpu%d/cpufreq", i);
+		fast_read_num_u64(p, "cpuinfo_avg_freq", buf, &t, 1000);
+		c->avg_freq += t;
+	}
+	c->avg_freq /= (c->num_cores > 1) ? c->num_cores : 1;
+
+	if (c->module == unknown)
+		return;
+
+	// commented out unused values so its faster
+	if (c->module == zenpower) {
+		fast_read_num_i16(c->hwmon, "/temp1_input", buf, &c->tdie, 1000);
+		fast_read_num_i16(c->hwmon, "/temp2_input", buf, &c->tctl, 1000);
+		fast_read_num_i16(c->hwmon, "/temp3_input", buf, &c->tccd1, 1000);
+		// utils::fastReadNum<1000>(c->hwmon + "/in1_input", buf, c->vcore);
+		// utils::fastReadNum<1000>(c->hwmon + "/in2_input", buf, c->vsoc);
+	}
+
+	if (c->module == k10temp) {
+		fast_read_num_i16(c->hwmon, "/temp1_input", buf, &c->tctl, 1000);
+		fast_read_num_i16(c->hwmon, "/temp3_input", buf, &c->tccd1, 1000);
+	}
 
-void cpu_detect(struct cpu_sensors_t* t, const char* pci_dev) {
-	char path[128];
-	snprintf(path, sizeof(path), "/sys/bus/pci/devices/%s/hwmon", pci_dev);
 }
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