v4.19.13 snapshot.
diff --git a/drivers/macintosh/apm_emu.c b/drivers/macintosh/apm_emu.c
new file mode 100644
index 0000000..9821e63
--- /dev/null
+++ b/drivers/macintosh/apm_emu.c
@@ -0,0 +1,119 @@
+/*
+ * APM emulation for PMU-based machines
+ *
+ * Copyright 2001 Benjamin Herrenschmidt (benh@kernel.crashing.org)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/apm-emulation.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+
+#define APM_CRITICAL 10
+#define APM_LOW 30
+
+static void pmu_apm_get_power_status(struct apm_power_info *info)
+{
+ int percentage = -1;
+ int batteries = 0;
+ int time_units = -1;
+ int real_count = 0;
+ int i;
+ char charging = 0;
+ long charge = -1;
+ long amperage = 0;
+ unsigned long btype = 0;
+
+ info->battery_status = APM_BATTERY_STATUS_UNKNOWN;
+ info->battery_flag = APM_BATTERY_FLAG_UNKNOWN;
+ info->units = APM_UNITS_MINS;
+
+ if (pmu_power_flags & PMU_PWR_AC_PRESENT)
+ info->ac_line_status = APM_AC_ONLINE;
+ else
+ info->ac_line_status = APM_AC_OFFLINE;
+
+ for (i=0; i<pmu_battery_count; i++) {
+ if (pmu_batteries[i].flags & PMU_BATT_PRESENT) {
+ batteries++;
+ if (percentage < 0)
+ percentage = 0;
+ if (charge < 0)
+ charge = 0;
+ percentage += (pmu_batteries[i].charge * 100) /
+ pmu_batteries[i].max_charge;
+ charge += pmu_batteries[i].charge;
+ amperage += pmu_batteries[i].amperage;
+ if (btype == 0)
+ btype = (pmu_batteries[i].flags & PMU_BATT_TYPE_MASK);
+ real_count++;
+ if ((pmu_batteries[i].flags & PMU_BATT_CHARGING))
+ charging++;
+ }
+ }
+ if (batteries == 0)
+ info->ac_line_status = APM_AC_ONLINE;
+
+ if (real_count) {
+ if (amperage < 0) {
+ if (btype == PMU_BATT_TYPE_SMART)
+ time_units = (charge * 59) / (amperage * -1);
+ else
+ time_units = (charge * 16440) / (amperage * -60);
+ }
+ percentage /= real_count;
+ if (charging > 0) {
+ info->battery_status = APM_BATTERY_STATUS_CHARGING;
+ info->battery_flag = APM_BATTERY_FLAG_CHARGING;
+ } else if (percentage <= APM_CRITICAL) {
+ info->battery_status = APM_BATTERY_STATUS_CRITICAL;
+ info->battery_flag = APM_BATTERY_FLAG_CRITICAL;
+ } else if (percentage <= APM_LOW) {
+ info->battery_status = APM_BATTERY_STATUS_LOW;
+ info->battery_flag = APM_BATTERY_FLAG_LOW;
+ } else {
+ info->battery_status = APM_BATTERY_STATUS_HIGH;
+ info->battery_flag = APM_BATTERY_FLAG_HIGH;
+ }
+ }
+
+ info->battery_life = percentage;
+ info->time = time_units;
+}
+
+static int __init apm_emu_init(void)
+{
+ apm_get_power_status = pmu_apm_get_power_status;
+
+ printk(KERN_INFO "apm_emu: PMU APM Emulation initialized.\n");
+
+ return 0;
+}
+
+static void __exit apm_emu_exit(void)
+{
+ if (apm_get_power_status == pmu_apm_get_power_status)
+ apm_get_power_status = NULL;
+
+ printk(KERN_INFO "apm_emu: PMU APM Emulation removed.\n");
+}
+
+module_init(apm_emu_init);
+module_exit(apm_emu_exit);
+
+MODULE_AUTHOR("Benjamin Herrenschmidt");
+MODULE_DESCRIPTION("APM emulation for PowerMac");
+MODULE_LICENSE("GPL");