forked from luck/tmp_suning_uos_patched
07b75260eb
Pull MIPS updates from Ralf Baechle: "This is the main pull request for MIPS for 4.7. Here's the summary of the changes: - ATH79: Support for DTB passuing using the UHI boot protocol - ATH79: Remove support for builtin DTB. - ATH79: Add zboot debug serial support. - ATH79: Add initial support for Dragino MS14 (Dragine 2), Onion Omega and DPT-Module. - ATH79: Update devicetree clock support for AR9132 and AR9331. - ATH79: Cleanup the DT code. - ATH79: Support newer SOCs in ath79_ddr_ctrl_init. - ATH79: Fix regression in PCI window initialization. - BCM47xx: Move SPROM driver to drivers/firmware/ - BCM63xx: Enable partition parser in defconfig. - BMIPS: BMIPS5000 has I cache filing from D cache - BMIPS: BMIPS: Add cpu-feature-overrides.h - BMIPS: Add Whirlwind support - BMIPS: Adjust mips-hpt-frequency for BCM7435 - BMIPS: Remove maxcpus from BCM97435SVMB DTS - BMIPS: Add missing 7038 L1 register cells to BCM7435 - BMIPS: Various tweaks to initialization code. - BMIPS: Enable partition parser in defconfig. - BMIPS: Cache tweaks. - BMIPS: Add UART, I2C and SATA devices to DT. - BMIPS: Add BCM6358 and BCM63268support - BMIPS: Add device tree example for BCM6358. - BMIPS: Improve Improve BCM6328 and BCM6368 device trees - Lantiq: Add support for device tree file from boot loader - Lantiq: Allow build with no built-in DT. - Loongson 3: Reserve 32MB for RS780E integrated GPU. - Loongson 3: Fix build error after ld-version.sh modification - Loongson 3: Move chipset ACPI code from drivers to arch. - Loongson 3: Speedup irq processing. - Loongson 3: Add basic Loongson 3A support. - Loongson 3: Set cache flush handlers to nop. - Loongson 3: Invalidate special TLBs when needed. - Loongson 3: Fast TLB refill handler. - MT7620: Fallback strategy for invalid syscfg0. - Netlogic: Fix CP0_EBASE redefinition warnings - Octeon: Initialization fixes - Octeon: Add DTS files for the D-Link DSR-1000N and EdgeRouter Lite - Octeon: Enable add Octeon-drivers in cavium_octeon_defconfig - Octeon: Correctly handle endian-swapped initramfs images. - Octeon: Support CN73xx, CN75xx and CN78xx. - Octeon: Remove dead code from cvmx-sysinfo. - Octeon: Extend number of supported CPUs past 32. - Octeon: Remove some code limiting NR_IRQS to 255. - Octeon: Simplify octeon_irq_ciu_gpio_set_type. - Octeon: Mark some functions __init in smp.c - Octeon: Octeon: Add Octeon III CN7xxx interface detection - PIC32: Add serial driver and bindings for it. - PIC32: Add PIC32 deadman timer driver and bindings. - PIC32: Add PIC32 clock timer driver and bindings. - Pistachio: Determine SoC revision during boot - Sibyte: Fix Kconfig dependencies of SIBYTE_BUS_WATCHER. - Sibyte: Strip redundant comments from bcm1480_regs.h. - Panic immediately if panic_on_oops is set. - module: fix incorrect IS_ERR_VALUE macro usage. - module: Make consistent use of pr_* - Remove no longer needed work_on_cpu() call. - Remove CONFIG_IPV6_PRIVACY from defconfigs. - Fix registers of non-crashing CPUs in dumps. - Handle MIPSisms in new vmcore_elf32_check_arch. - Select CONFIG_HANDLE_DOMAIN_IRQ and make it work. - Allow RIXI to be used on non-R2 or R6 cores. - Reserve nosave data for hibernation - Fix siginfo.h to use strict POSIX types. - Don't unwind user mode with EVA. - Fix watchpoint restoration - Ptrace watchpoints for R6. - Sync icache when it fills from dcache - I6400 I-cache fills from dcache. - Various MSA fixes. - Cleanup MIPS_CPU_* definitions. - Signal: Move generic copy_siginfo to signal.h - Signal: Fix uapi include in exported asm/siginfo.h - Timer fixes for sake of KVM. - XPA TLB refill fixes. - Treat perf counter feature - Update John Crispin's email address - Add PIC32 watchdog and bindings. - Handle R10000 LL/SC bug in set_pte() - cpufreq: Various fixes for Longson1. - R6: Fix R2 emulation. - mathemu: Cosmetic fix to ADDIUPC emulation, plenty of other small fixes - ELF: ABI and FP fixes. - Allow for relocatable kernel and use that to support KASLR. - Fix CPC_BASE_ADDR mask - Plenty fo smp-cps, CM, R6 and M6250 fixes. - Make reset_control_ops const. - Fix kernel command line handling of leading whitespace. - Cleanups to cache handling. - Add brcm, bcm6345-l1-intc device tree bindings. - Use generic clkdev.h header - Remove CLK_IS_ROOT usage. - Misc small cleanups. - CM: Fix compilation error when !MIPS_CM - oprofile: Fix a preemption issue - Detect DSP ASE v3 support:1" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (275 commits) MIPS: pic32mzda: fix getting timer clock rate. MIPS: ath79: fix regression in PCI window initialization MIPS: ath79: make ath79_ddr_ctrl_init() compatible for newer SoCs MIPS: Fix VZ probe gas errors with binutils <2.24 MIPS: perf: Fix I6400 event numbers MIPS: DEC: Export `ioasic_ssr_lock' to modules MIPS: MSA: Fix a link error on `_init_msa_upper' with older GCC MIPS: CM: Fix compilation error when !MIPS_CM MIPS: Fix genvdso error on rebuild USB: ohci-jz4740: Remove obsolete driver MIPS: JZ4740: Probe OHCI platform device via DT MIPS: JZ4740: Qi LB60: Remove support for AVT2 variant MIPS: pistachio: Determine SoC revision during boot MIPS: BMIPS: Adjust mips-hpt-frequency for BCM7435 mips: mt7620: fallback to SDRAM when syscfg0 does not have a valid value for the memory type MIPS: Prevent "restoration" of MSA context in non-MSA kernels MIPS: cevt-r4k: Dynamically calculate min_delta_ns MIPS: malta-time: Take seconds into account MIPS: malta-time: Start GIC count before syncing to RTC MIPS: Force CPUs to lose FP context during mode switches ...
208 lines
5.3 KiB
C
208 lines
5.3 KiB
C
#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/reboot.h>
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#include <linux/jiffies.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <loongson.h>
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#include <boot_param.h>
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#include <loongson_hwmon.h>
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/*
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* Loongson-3 series cpu has two sensors inside,
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* each of them from 0 to 255,
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* if more than 127, that is dangerous.
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* here only provide sensor1 data, because it always hot than sensor0
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*/
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int loongson3_cpu_temp(int cpu)
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{
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u32 reg;
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reg = LOONGSON_CHIPTEMP(cpu);
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if ((read_c0_prid() & PRID_REV_MASK) == PRID_REV_LOONGSON3A_R1)
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reg = (reg >> 8) & 0xff;
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else
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reg = ((reg >> 8) & 0xff) - 100;
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return (int)reg * 1000;
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}
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static struct device *cpu_hwmon_dev;
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static ssize_t get_hwmon_name(struct device *dev,
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struct device_attribute *attr, char *buf);
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static SENSOR_DEVICE_ATTR(name, S_IRUGO, get_hwmon_name, NULL, 0);
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static struct attribute *cpu_hwmon_attributes[] = {
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&sensor_dev_attr_name.dev_attr.attr,
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NULL
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};
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/* Hwmon device attribute group */
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static struct attribute_group cpu_hwmon_attribute_group = {
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.attrs = cpu_hwmon_attributes,
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};
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/* Hwmon device get name */
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static ssize_t get_hwmon_name(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "cpu-hwmon\n");
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}
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static ssize_t get_cpu0_temp(struct device *dev,
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struct device_attribute *attr, char *buf);
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static ssize_t get_cpu1_temp(struct device *dev,
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struct device_attribute *attr, char *buf);
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static ssize_t cpu0_temp_label(struct device *dev,
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struct device_attribute *attr, char *buf);
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static ssize_t cpu1_temp_label(struct device *dev,
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struct device_attribute *attr, char *buf);
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static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_cpu0_temp, NULL, 1);
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static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, cpu0_temp_label, NULL, 1);
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static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_cpu1_temp, NULL, 2);
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static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, cpu1_temp_label, NULL, 2);
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static const struct attribute *hwmon_cputemp1[] = {
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&sensor_dev_attr_temp1_input.dev_attr.attr,
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&sensor_dev_attr_temp1_label.dev_attr.attr,
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NULL
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};
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static const struct attribute *hwmon_cputemp2[] = {
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&sensor_dev_attr_temp2_input.dev_attr.attr,
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&sensor_dev_attr_temp2_label.dev_attr.attr,
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NULL
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};
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static ssize_t cpu0_temp_label(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "CPU 0 Temperature\n");
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}
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static ssize_t cpu1_temp_label(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "CPU 1 Temperature\n");
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}
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static ssize_t get_cpu0_temp(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int value = loongson3_cpu_temp(0);
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return sprintf(buf, "%d\n", value);
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}
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static ssize_t get_cpu1_temp(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int value = loongson3_cpu_temp(1);
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return sprintf(buf, "%d\n", value);
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}
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static int create_sysfs_cputemp_files(struct kobject *kobj)
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{
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int ret;
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ret = sysfs_create_files(kobj, hwmon_cputemp1);
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if (ret)
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goto sysfs_create_temp1_fail;
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if (loongson_sysconf.nr_cpus <= loongson_sysconf.cores_per_package)
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return 0;
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ret = sysfs_create_files(kobj, hwmon_cputemp2);
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if (ret)
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goto sysfs_create_temp2_fail;
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return 0;
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sysfs_create_temp2_fail:
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sysfs_remove_files(kobj, hwmon_cputemp1);
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sysfs_create_temp1_fail:
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return -1;
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}
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static void remove_sysfs_cputemp_files(struct kobject *kobj)
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{
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sysfs_remove_files(&cpu_hwmon_dev->kobj, hwmon_cputemp1);
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if (loongson_sysconf.nr_cpus > loongson_sysconf.cores_per_package)
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sysfs_remove_files(&cpu_hwmon_dev->kobj, hwmon_cputemp2);
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}
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#define CPU_THERMAL_THRESHOLD 90000
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static struct delayed_work thermal_work;
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static void do_thermal_timer(struct work_struct *work)
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{
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int value = loongson3_cpu_temp(0);
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if (value <= CPU_THERMAL_THRESHOLD)
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schedule_delayed_work(&thermal_work, msecs_to_jiffies(5000));
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else
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orderly_poweroff(true);
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}
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static int __init loongson_hwmon_init(void)
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{
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int ret;
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pr_info("Loongson Hwmon Enter...\n");
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cpu_hwmon_dev = hwmon_device_register(NULL);
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if (IS_ERR(cpu_hwmon_dev)) {
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ret = -ENOMEM;
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pr_err("hwmon_device_register fail!\n");
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goto fail_hwmon_device_register;
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}
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ret = sysfs_create_group(&cpu_hwmon_dev->kobj,
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&cpu_hwmon_attribute_group);
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if (ret) {
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pr_err("fail to create loongson hwmon!\n");
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goto fail_sysfs_create_group_hwmon;
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}
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ret = create_sysfs_cputemp_files(&cpu_hwmon_dev->kobj);
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if (ret) {
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pr_err("fail to create cpu temperature interface!\n");
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goto fail_create_sysfs_cputemp_files;
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}
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INIT_DEFERRABLE_WORK(&thermal_work, do_thermal_timer);
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schedule_delayed_work(&thermal_work, msecs_to_jiffies(20000));
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return ret;
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fail_create_sysfs_cputemp_files:
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sysfs_remove_group(&cpu_hwmon_dev->kobj,
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&cpu_hwmon_attribute_group);
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fail_sysfs_create_group_hwmon:
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hwmon_device_unregister(cpu_hwmon_dev);
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fail_hwmon_device_register:
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return ret;
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}
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static void __exit loongson_hwmon_exit(void)
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{
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cancel_delayed_work_sync(&thermal_work);
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remove_sysfs_cputemp_files(&cpu_hwmon_dev->kobj);
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sysfs_remove_group(&cpu_hwmon_dev->kobj,
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&cpu_hwmon_attribute_group);
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hwmon_device_unregister(cpu_hwmon_dev);
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}
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module_init(loongson_hwmon_init);
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module_exit(loongson_hwmon_exit);
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MODULE_AUTHOR("Yu Xiang <xiangy@lemote.com>");
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MODULE_AUTHOR("Huacai Chen <chenhc@lemote.com>");
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MODULE_DESCRIPTION("Loongson CPU Hwmon driver");
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MODULE_LICENSE("GPL");
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