123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107 |
- /*
- * intel_soc_dts_thermal.c
- * Copyright (c) 2014, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope 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.
- *
- */
- #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
- #include <linux/module.h>
- #include <linux/interrupt.h>
- #include <asm/cpu_device_id.h>
- #include "intel_soc_dts_iosf.h"
- #define CRITICAL_OFFSET_FROM_TJ_MAX 5000
- static int crit_offset = CRITICAL_OFFSET_FROM_TJ_MAX;
- module_param(crit_offset, int, 0644);
- MODULE_PARM_DESC(crit_offset,
- "Critical Temperature offset from tj max in millidegree Celsius.");
- /* IRQ 86 is a fixed APIC interrupt for BYT DTS Aux threshold notifications */
- #define BYT_SOC_DTS_APIC_IRQ 86
- static int soc_dts_thres_irq;
- static struct intel_soc_dts_sensors *soc_dts;
- static irqreturn_t soc_irq_thread_fn(int irq, void *dev_data)
- {
- pr_debug("proc_thermal_interrupt\n");
- intel_soc_dts_iosf_interrupt_handler(soc_dts);
- return IRQ_HANDLED;
- }
- static const struct x86_cpu_id soc_thermal_ids[] = {
- { X86_VENDOR_INTEL, X86_FAMILY_ANY, 0x37, 0, BYT_SOC_DTS_APIC_IRQ},
- {}
- };
- MODULE_DEVICE_TABLE(x86cpu, soc_thermal_ids);
- static int __init intel_soc_thermal_init(void)
- {
- int err = 0;
- const struct x86_cpu_id *match_cpu;
- match_cpu = x86_match_cpu(soc_thermal_ids);
- if (!match_cpu)
- return -ENODEV;
- /* Create a zone with 2 trips with marked as read only */
- soc_dts = intel_soc_dts_iosf_init(INTEL_SOC_DTS_INTERRUPT_APIC, 2, 1);
- if (IS_ERR(soc_dts)) {
- err = PTR_ERR(soc_dts);
- return err;
- }
- soc_dts_thres_irq = (int)match_cpu->driver_data;
- if (soc_dts_thres_irq) {
- err = request_threaded_irq(soc_dts_thres_irq, NULL,
- soc_irq_thread_fn,
- IRQF_TRIGGER_RISING | IRQF_ONESHOT,
- "soc_dts", soc_dts);
- if (err) {
- pr_err("request_threaded_irq ret %d\n", err);
- goto error_irq;
- }
- }
- err = intel_soc_dts_iosf_add_read_only_critical_trip(soc_dts,
- crit_offset);
- if (err)
- goto error_trips;
- return 0;
- error_trips:
- if (soc_dts_thres_irq)
- free_irq(soc_dts_thres_irq, soc_dts);
- error_irq:
- intel_soc_dts_iosf_exit(soc_dts);
- return err;
- }
- static void __exit intel_soc_thermal_exit(void)
- {
- if (soc_dts_thres_irq)
- free_irq(soc_dts_thres_irq, soc_dts);
- intel_soc_dts_iosf_exit(soc_dts);
- }
- module_init(intel_soc_thermal_init)
- module_exit(intel_soc_thermal_exit)
- MODULE_DESCRIPTION("Intel SoC DTS Thermal Driver");
- MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
- MODULE_LICENSE("GPL v2");
|