mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1341 lines
30 KiB
1341 lines
30 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* dell-smm-hwmon.c -- Linux driver for accessing the SMM BIOS on Dell laptops. |
|
* |
|
* Copyright (C) 2001 Massimo Dal Zotto <[email protected]> |
|
* |
|
* Hwmon integration: |
|
* Copyright (C) 2011 Jean Delvare <[email protected]> |
|
* Copyright (C) 2013, 2014 Guenter Roeck <[email protected]> |
|
* Copyright (C) 2014, 2015 Pali Rohár <[email protected]> |
|
*/ |
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
|
|
|
#include <linux/cpu.h> |
|
#include <linux/delay.h> |
|
#include <linux/err.h> |
|
#include <linux/module.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/types.h> |
|
#include <linux/init.h> |
|
#include <linux/proc_fs.h> |
|
#include <linux/seq_file.h> |
|
#include <linux/dmi.h> |
|
#include <linux/capability.h> |
|
#include <linux/mutex.h> |
|
#include <linux/hwmon.h> |
|
#include <linux/uaccess.h> |
|
#include <linux/io.h> |
|
#include <linux/sched.h> |
|
#include <linux/ctype.h> |
|
#include <linux/smp.h> |
|
|
|
#include <linux/i8k.h> |
|
|
|
#define I8K_SMM_FN_STATUS 0x0025 |
|
#define I8K_SMM_POWER_STATUS 0x0069 |
|
#define I8K_SMM_SET_FAN 0x01a3 |
|
#define I8K_SMM_GET_FAN 0x00a3 |
|
#define I8K_SMM_GET_SPEED 0x02a3 |
|
#define I8K_SMM_GET_FAN_TYPE 0x03a3 |
|
#define I8K_SMM_GET_NOM_SPEED 0x04a3 |
|
#define I8K_SMM_GET_TEMP 0x10a3 |
|
#define I8K_SMM_GET_TEMP_TYPE 0x11a3 |
|
#define I8K_SMM_GET_DELL_SIG1 0xfea3 |
|
#define I8K_SMM_GET_DELL_SIG2 0xffa3 |
|
|
|
#define I8K_FAN_MULT 30 |
|
#define I8K_FAN_MAX_RPM 30000 |
|
#define I8K_MAX_TEMP 127 |
|
|
|
#define I8K_FN_NONE 0x00 |
|
#define I8K_FN_UP 0x01 |
|
#define I8K_FN_DOWN 0x02 |
|
#define I8K_FN_MUTE 0x04 |
|
#define I8K_FN_MASK 0x07 |
|
#define I8K_FN_SHIFT 8 |
|
|
|
#define I8K_POWER_AC 0x05 |
|
#define I8K_POWER_BATTERY 0x01 |
|
|
|
#define DELL_SMM_NO_TEMP 10 |
|
#define DELL_SMM_NO_FANS 3 |
|
|
|
struct dell_smm_data { |
|
struct mutex i8k_mutex; /* lock for sensors writes */ |
|
char bios_version[4]; |
|
char bios_machineid[16]; |
|
uint i8k_fan_mult; |
|
uint i8k_pwm_mult; |
|
uint i8k_fan_max; |
|
bool disallow_fan_type_call; |
|
bool disallow_fan_support; |
|
unsigned int manual_fan; |
|
unsigned int auto_fan; |
|
int temp_type[DELL_SMM_NO_TEMP]; |
|
bool fan[DELL_SMM_NO_FANS]; |
|
int fan_type[DELL_SMM_NO_FANS]; |
|
}; |
|
|
|
MODULE_AUTHOR("Massimo Dal Zotto ([email protected])"); |
|
MODULE_AUTHOR("Pali Rohár <[email protected]>"); |
|
MODULE_DESCRIPTION("Dell laptop SMM BIOS hwmon driver"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_ALIAS("i8k"); |
|
|
|
static bool force; |
|
module_param(force, bool, 0); |
|
MODULE_PARM_DESC(force, "Force loading without checking for supported models"); |
|
|
|
static bool ignore_dmi; |
|
module_param(ignore_dmi, bool, 0); |
|
MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); |
|
|
|
#if IS_ENABLED(CONFIG_I8K) |
|
static bool restricted = true; |
|
module_param(restricted, bool, 0); |
|
MODULE_PARM_DESC(restricted, "Restrict fan control and serial number to CAP_SYS_ADMIN (default: 1)"); |
|
|
|
static bool power_status; |
|
module_param(power_status, bool, 0600); |
|
MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k (default: 0)"); |
|
#endif |
|
|
|
static uint fan_mult; |
|
module_param(fan_mult, uint, 0); |
|
MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with (default: autodetect)"); |
|
|
|
static uint fan_max; |
|
module_param(fan_max, uint, 0); |
|
MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed (default: autodetect)"); |
|
|
|
struct smm_regs { |
|
unsigned int eax; |
|
unsigned int ebx __packed; |
|
unsigned int ecx __packed; |
|
unsigned int edx __packed; |
|
unsigned int esi __packed; |
|
unsigned int edi __packed; |
|
}; |
|
|
|
static const char * const temp_labels[] = { |
|
"CPU", |
|
"GPU", |
|
"SODIMM", |
|
"Other", |
|
"Ambient", |
|
"Other", |
|
}; |
|
|
|
static const char * const fan_labels[] = { |
|
"Processor Fan", |
|
"Motherboard Fan", |
|
"Video Fan", |
|
"Power Supply Fan", |
|
"Chipset Fan", |
|
"Other Fan", |
|
}; |
|
|
|
static const char * const docking_labels[] = { |
|
"Docking Processor Fan", |
|
"Docking Motherboard Fan", |
|
"Docking Video Fan", |
|
"Docking Power Supply Fan", |
|
"Docking Chipset Fan", |
|
"Docking Other Fan", |
|
}; |
|
|
|
static inline const char __init *i8k_get_dmi_data(int field) |
|
{ |
|
const char *dmi_data = dmi_get_system_info(field); |
|
|
|
return dmi_data && *dmi_data ? dmi_data : "?"; |
|
} |
|
|
|
/* |
|
* Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. |
|
*/ |
|
static int i8k_smm_func(void *par) |
|
{ |
|
ktime_t calltime = ktime_get(); |
|
struct smm_regs *regs = par; |
|
int eax = regs->eax; |
|
int ebx = regs->ebx; |
|
long long duration; |
|
int rc; |
|
|
|
/* SMM requires CPU 0 */ |
|
if (smp_processor_id() != 0) |
|
return -EBUSY; |
|
|
|
#if defined(CONFIG_X86_64) |
|
asm volatile("pushq %%rax\n\t" |
|
"movl 0(%%rax),%%edx\n\t" |
|
"pushq %%rdx\n\t" |
|
"movl 4(%%rax),%%ebx\n\t" |
|
"movl 8(%%rax),%%ecx\n\t" |
|
"movl 12(%%rax),%%edx\n\t" |
|
"movl 16(%%rax),%%esi\n\t" |
|
"movl 20(%%rax),%%edi\n\t" |
|
"popq %%rax\n\t" |
|
"out %%al,$0xb2\n\t" |
|
"out %%al,$0x84\n\t" |
|
"xchgq %%rax,(%%rsp)\n\t" |
|
"movl %%ebx,4(%%rax)\n\t" |
|
"movl %%ecx,8(%%rax)\n\t" |
|
"movl %%edx,12(%%rax)\n\t" |
|
"movl %%esi,16(%%rax)\n\t" |
|
"movl %%edi,20(%%rax)\n\t" |
|
"popq %%rdx\n\t" |
|
"movl %%edx,0(%%rax)\n\t" |
|
"pushfq\n\t" |
|
"popq %%rax\n\t" |
|
"andl $1,%%eax\n" |
|
: "=a"(rc) |
|
: "a"(regs) |
|
: "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); |
|
#else |
|
asm volatile("pushl %%eax\n\t" |
|
"movl 0(%%eax),%%edx\n\t" |
|
"push %%edx\n\t" |
|
"movl 4(%%eax),%%ebx\n\t" |
|
"movl 8(%%eax),%%ecx\n\t" |
|
"movl 12(%%eax),%%edx\n\t" |
|
"movl 16(%%eax),%%esi\n\t" |
|
"movl 20(%%eax),%%edi\n\t" |
|
"popl %%eax\n\t" |
|
"out %%al,$0xb2\n\t" |
|
"out %%al,$0x84\n\t" |
|
"xchgl %%eax,(%%esp)\n\t" |
|
"movl %%ebx,4(%%eax)\n\t" |
|
"movl %%ecx,8(%%eax)\n\t" |
|
"movl %%edx,12(%%eax)\n\t" |
|
"movl %%esi,16(%%eax)\n\t" |
|
"movl %%edi,20(%%eax)\n\t" |
|
"popl %%edx\n\t" |
|
"movl %%edx,0(%%eax)\n\t" |
|
"lahf\n\t" |
|
"shrl $8,%%eax\n\t" |
|
"andl $1,%%eax\n" |
|
: "=a"(rc) |
|
: "a"(regs) |
|
: "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); |
|
#endif |
|
if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
|
rc = -EINVAL; |
|
|
|
duration = ktime_us_delta(ktime_get(), calltime); |
|
pr_debug("smm(0x%.4x 0x%.4x) = 0x%.4x (took %7lld usecs)\n", eax, ebx, |
|
(rc ? 0xffff : regs->eax & 0xffff), duration); |
|
|
|
return rc; |
|
} |
|
|
|
/* |
|
* Call the System Management Mode BIOS. |
|
*/ |
|
static int i8k_smm(struct smm_regs *regs) |
|
{ |
|
int ret; |
|
|
|
cpus_read_lock(); |
|
ret = smp_call_on_cpu(0, i8k_smm_func, regs, true); |
|
cpus_read_unlock(); |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* Read the fan status. |
|
*/ |
|
static int i8k_get_fan_status(const struct dell_smm_data *data, int fan) |
|
{ |
|
struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
|
|
|
if (data->disallow_fan_support) |
|
return -EINVAL; |
|
|
|
regs.ebx = fan & 0xff; |
|
return i8k_smm(®s) ? : regs.eax & 0xff; |
|
} |
|
|
|
/* |
|
* Read the fan speed in RPM. |
|
*/ |
|
static int i8k_get_fan_speed(const struct dell_smm_data *data, int fan) |
|
{ |
|
struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
|
|
|
if (data->disallow_fan_support) |
|
return -EINVAL; |
|
|
|
regs.ebx = fan & 0xff; |
|
return i8k_smm(®s) ? : (regs.eax & 0xffff) * data->i8k_fan_mult; |
|
} |
|
|
|
/* |
|
* Read the fan type. |
|
*/ |
|
static int _i8k_get_fan_type(const struct dell_smm_data *data, int fan) |
|
{ |
|
struct smm_regs regs = { .eax = I8K_SMM_GET_FAN_TYPE, }; |
|
|
|
if (data->disallow_fan_support || data->disallow_fan_type_call) |
|
return -EINVAL; |
|
|
|
regs.ebx = fan & 0xff; |
|
return i8k_smm(®s) ? : regs.eax & 0xff; |
|
} |
|
|
|
static int i8k_get_fan_type(struct dell_smm_data *data, int fan) |
|
{ |
|
/* I8K_SMM_GET_FAN_TYPE SMM call is expensive, so cache values */ |
|
if (data->fan_type[fan] == INT_MIN) |
|
data->fan_type[fan] = _i8k_get_fan_type(data, fan); |
|
|
|
return data->fan_type[fan]; |
|
} |
|
|
|
/* |
|
* Read the fan nominal rpm for specific fan speed. |
|
*/ |
|
static int __init i8k_get_fan_nominal_speed(const struct dell_smm_data *data, int fan, int speed) |
|
{ |
|
struct smm_regs regs = { .eax = I8K_SMM_GET_NOM_SPEED, }; |
|
|
|
if (data->disallow_fan_support) |
|
return -EINVAL; |
|
|
|
regs.ebx = (fan & 0xff) | (speed << 8); |
|
return i8k_smm(®s) ? : (regs.eax & 0xffff) * data->i8k_fan_mult; |
|
} |
|
|
|
/* |
|
* Enable or disable automatic BIOS fan control support |
|
*/ |
|
static int i8k_enable_fan_auto_mode(const struct dell_smm_data *data, bool enable) |
|
{ |
|
struct smm_regs regs = { }; |
|
|
|
if (data->disallow_fan_support) |
|
return -EINVAL; |
|
|
|
regs.eax = enable ? data->auto_fan : data->manual_fan; |
|
return i8k_smm(®s); |
|
} |
|
|
|
/* |
|
* Set the fan speed (off, low, high, ...). |
|
*/ |
|
static int i8k_set_fan(const struct dell_smm_data *data, int fan, int speed) |
|
{ |
|
struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
|
|
|
if (data->disallow_fan_support) |
|
return -EINVAL; |
|
|
|
speed = (speed < 0) ? 0 : ((speed > data->i8k_fan_max) ? data->i8k_fan_max : speed); |
|
regs.ebx = (fan & 0xff) | (speed << 8); |
|
|
|
return i8k_smm(®s); |
|
} |
|
|
|
static int __init i8k_get_temp_type(int sensor) |
|
{ |
|
struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP_TYPE, }; |
|
|
|
regs.ebx = sensor & 0xff; |
|
return i8k_smm(®s) ? : regs.eax & 0xff; |
|
} |
|
|
|
/* |
|
* Read the cpu temperature. |
|
*/ |
|
static int _i8k_get_temp(int sensor) |
|
{ |
|
struct smm_regs regs = { |
|
.eax = I8K_SMM_GET_TEMP, |
|
.ebx = sensor & 0xff, |
|
}; |
|
|
|
return i8k_smm(®s) ? : regs.eax & 0xff; |
|
} |
|
|
|
static int i8k_get_temp(int sensor) |
|
{ |
|
int temp = _i8k_get_temp(sensor); |
|
|
|
/* |
|
* Sometimes the temperature sensor returns 0x99, which is out of range. |
|
* In this case we retry (once) before returning an error. |
|
# 1003655137 00000058 00005a4b |
|
# 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees |
|
# 1003655139 00000054 00005c52 |
|
*/ |
|
if (temp == 0x99) { |
|
msleep(100); |
|
temp = _i8k_get_temp(sensor); |
|
} |
|
/* |
|
* Return -ENODATA for all invalid temperatures. |
|
* |
|
* Known instances are the 0x99 value as seen above as well as |
|
* 0xc1 (193), which may be returned when trying to read the GPU |
|
* temperature if the system supports a GPU and it is currently |
|
* turned off. |
|
*/ |
|
if (temp > I8K_MAX_TEMP) |
|
return -ENODATA; |
|
|
|
return temp; |
|
} |
|
|
|
static int __init i8k_get_dell_signature(int req_fn) |
|
{ |
|
struct smm_regs regs = { .eax = req_fn, }; |
|
int rc; |
|
|
|
rc = i8k_smm(®s); |
|
if (rc < 0) |
|
return rc; |
|
|
|
return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_I8K) |
|
|
|
/* |
|
* Read the Fn key status. |
|
*/ |
|
static int i8k_get_fn_status(void) |
|
{ |
|
struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; |
|
int rc; |
|
|
|
rc = i8k_smm(®s); |
|
if (rc < 0) |
|
return rc; |
|
|
|
switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { |
|
case I8K_FN_UP: |
|
return I8K_VOL_UP; |
|
case I8K_FN_DOWN: |
|
return I8K_VOL_DOWN; |
|
case I8K_FN_MUTE: |
|
return I8K_VOL_MUTE; |
|
default: |
|
return 0; |
|
} |
|
} |
|
|
|
/* |
|
* Read the power status. |
|
*/ |
|
static int i8k_get_power_status(void) |
|
{ |
|
struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; |
|
int rc; |
|
|
|
rc = i8k_smm(®s); |
|
if (rc < 0) |
|
return rc; |
|
|
|
return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; |
|
} |
|
|
|
/* |
|
* Procfs interface |
|
*/ |
|
|
|
static int |
|
i8k_ioctl_unlocked(struct file *fp, struct dell_smm_data *data, unsigned int cmd, unsigned long arg) |
|
{ |
|
int val = 0; |
|
int speed, err; |
|
unsigned char buff[16]; |
|
int __user *argp = (int __user *)arg; |
|
|
|
if (!argp) |
|
return -EINVAL; |
|
|
|
switch (cmd) { |
|
case I8K_BIOS_VERSION: |
|
if (!isdigit(data->bios_version[0]) || !isdigit(data->bios_version[1]) || |
|
!isdigit(data->bios_version[2])) |
|
return -EINVAL; |
|
|
|
val = (data->bios_version[0] << 16) | |
|
(data->bios_version[1] << 8) | data->bios_version[2]; |
|
break; |
|
|
|
case I8K_MACHINE_ID: |
|
if (restricted && !capable(CAP_SYS_ADMIN)) |
|
return -EPERM; |
|
|
|
memset(buff, 0, sizeof(buff)); |
|
strscpy(buff, data->bios_machineid, sizeof(buff)); |
|
break; |
|
|
|
case I8K_FN_STATUS: |
|
val = i8k_get_fn_status(); |
|
break; |
|
|
|
case I8K_POWER_STATUS: |
|
val = i8k_get_power_status(); |
|
break; |
|
|
|
case I8K_GET_TEMP: |
|
val = i8k_get_temp(0); |
|
break; |
|
|
|
case I8K_GET_SPEED: |
|
if (copy_from_user(&val, argp, sizeof(int))) |
|
return -EFAULT; |
|
|
|
val = i8k_get_fan_speed(data, val); |
|
break; |
|
|
|
case I8K_GET_FAN: |
|
if (copy_from_user(&val, argp, sizeof(int))) |
|
return -EFAULT; |
|
|
|
val = i8k_get_fan_status(data, val); |
|
break; |
|
|
|
case I8K_SET_FAN: |
|
if (restricted && !capable(CAP_SYS_ADMIN)) |
|
return -EPERM; |
|
|
|
if (copy_from_user(&val, argp, sizeof(int))) |
|
return -EFAULT; |
|
|
|
if (copy_from_user(&speed, argp + 1, sizeof(int))) |
|
return -EFAULT; |
|
|
|
err = i8k_set_fan(data, val, speed); |
|
if (err < 0) |
|
return err; |
|
|
|
val = i8k_get_fan_status(data, val); |
|
break; |
|
|
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
if (val < 0) |
|
return val; |
|
|
|
switch (cmd) { |
|
case I8K_BIOS_VERSION: |
|
if (copy_to_user(argp, &val, 4)) |
|
return -EFAULT; |
|
|
|
break; |
|
case I8K_MACHINE_ID: |
|
if (copy_to_user(argp, buff, 16)) |
|
return -EFAULT; |
|
|
|
break; |
|
default: |
|
if (copy_to_user(argp, &val, sizeof(int))) |
|
return -EFAULT; |
|
|
|
break; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
|
{ |
|
struct dell_smm_data *data = PDE_DATA(file_inode(fp)); |
|
long ret; |
|
|
|
mutex_lock(&data->i8k_mutex); |
|
ret = i8k_ioctl_unlocked(fp, data, cmd, arg); |
|
mutex_unlock(&data->i8k_mutex); |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* Print the information for /proc/i8k. |
|
*/ |
|
static int i8k_proc_show(struct seq_file *seq, void *offset) |
|
{ |
|
struct dell_smm_data *data = seq->private; |
|
int fn_key, cpu_temp, ac_power; |
|
int left_fan, right_fan, left_speed, right_speed; |
|
|
|
cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
|
left_fan = i8k_get_fan_status(data, I8K_FAN_LEFT); /* 580 µs */ |
|
right_fan = i8k_get_fan_status(data, I8K_FAN_RIGHT); /* 580 µs */ |
|
left_speed = i8k_get_fan_speed(data, I8K_FAN_LEFT); /* 580 µs */ |
|
right_speed = i8k_get_fan_speed(data, I8K_FAN_RIGHT); /* 580 µs */ |
|
fn_key = i8k_get_fn_status(); /* 750 µs */ |
|
if (power_status) |
|
ac_power = i8k_get_power_status(); /* 14700 µs */ |
|
else |
|
ac_power = -1; |
|
|
|
/* |
|
* Info: |
|
* |
|
* 1) Format version (this will change if format changes) |
|
* 2) BIOS version |
|
* 3) BIOS machine ID |
|
* 4) Cpu temperature |
|
* 5) Left fan status |
|
* 6) Right fan status |
|
* 7) Left fan speed |
|
* 8) Right fan speed |
|
* 9) AC power |
|
* 10) Fn Key status |
|
*/ |
|
seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
|
I8K_PROC_FMT, |
|
data->bios_version, |
|
(restricted && !capable(CAP_SYS_ADMIN)) ? "-1" : data->bios_machineid, |
|
cpu_temp, |
|
left_fan, right_fan, left_speed, right_speed, |
|
ac_power, fn_key); |
|
|
|
return 0; |
|
} |
|
|
|
static int i8k_open_fs(struct inode *inode, struct file *file) |
|
{ |
|
return single_open(file, i8k_proc_show, PDE_DATA(inode)); |
|
} |
|
|
|
static const struct proc_ops i8k_proc_ops = { |
|
.proc_open = i8k_open_fs, |
|
.proc_read = seq_read, |
|
.proc_lseek = seq_lseek, |
|
.proc_release = single_release, |
|
.proc_ioctl = i8k_ioctl, |
|
}; |
|
|
|
static void i8k_exit_procfs(void *param) |
|
{ |
|
remove_proc_entry("i8k", NULL); |
|
} |
|
|
|
static void __init i8k_init_procfs(struct device *dev) |
|
{ |
|
struct dell_smm_data *data = dev_get_drvdata(dev); |
|
|
|
/* Only register exit function if creation was successful */ |
|
if (proc_create_data("i8k", 0, NULL, &i8k_proc_ops, data)) |
|
devm_add_action_or_reset(dev, i8k_exit_procfs, NULL); |
|
} |
|
|
|
#else |
|
|
|
static void __init i8k_init_procfs(struct device *dev) |
|
{ |
|
} |
|
|
|
#endif |
|
|
|
/* |
|
* Hwmon interface |
|
*/ |
|
|
|
static umode_t dell_smm_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, |
|
int channel) |
|
{ |
|
const struct dell_smm_data *data = drvdata; |
|
|
|
switch (type) { |
|
case hwmon_temp: |
|
switch (attr) { |
|
case hwmon_temp_input: |
|
case hwmon_temp_label: |
|
if (data->temp_type[channel] >= 0) |
|
return 0444; |
|
|
|
break; |
|
default: |
|
break; |
|
} |
|
break; |
|
case hwmon_fan: |
|
if (data->disallow_fan_support) |
|
break; |
|
|
|
switch (attr) { |
|
case hwmon_fan_input: |
|
if (data->fan[channel]) |
|
return 0444; |
|
|
|
break; |
|
case hwmon_fan_label: |
|
if (data->fan[channel] && !data->disallow_fan_type_call) |
|
return 0444; |
|
|
|
break; |
|
default: |
|
break; |
|
} |
|
break; |
|
case hwmon_pwm: |
|
if (data->disallow_fan_support) |
|
break; |
|
|
|
switch (attr) { |
|
case hwmon_pwm_input: |
|
if (data->fan[channel]) |
|
return 0644; |
|
|
|
break; |
|
case hwmon_pwm_enable: |
|
if (data->auto_fan) |
|
/* |
|
* There is no command for retrieve the current status |
|
* from BIOS, and userspace/firmware itself can change |
|
* it. |
|
* Thus we can only provide write-only access for now. |
|
*/ |
|
return 0200; |
|
|
|
break; |
|
default: |
|
break; |
|
} |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int dell_smm_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, |
|
long *val) |
|
{ |
|
struct dell_smm_data *data = dev_get_drvdata(dev); |
|
int ret; |
|
|
|
switch (type) { |
|
case hwmon_temp: |
|
switch (attr) { |
|
case hwmon_temp_input: |
|
ret = i8k_get_temp(channel); |
|
if (ret < 0) |
|
return ret; |
|
|
|
*val = ret * 1000; |
|
|
|
return 0; |
|
default: |
|
break; |
|
} |
|
break; |
|
case hwmon_fan: |
|
switch (attr) { |
|
case hwmon_fan_input: |
|
ret = i8k_get_fan_speed(data, channel); |
|
if (ret < 0) |
|
return ret; |
|
|
|
*val = ret; |
|
|
|
return 0; |
|
default: |
|
break; |
|
} |
|
break; |
|
case hwmon_pwm: |
|
switch (attr) { |
|
case hwmon_pwm_input: |
|
ret = i8k_get_fan_status(data, channel); |
|
if (ret < 0) |
|
return ret; |
|
|
|
*val = clamp_val(ret * data->i8k_pwm_mult, 0, 255); |
|
|
|
return 0; |
|
default: |
|
break; |
|
} |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static const char *dell_smm_fan_label(struct dell_smm_data *data, int channel) |
|
{ |
|
bool dock = false; |
|
int type = i8k_get_fan_type(data, channel); |
|
|
|
if (type < 0) |
|
return ERR_PTR(type); |
|
|
|
if (type & 0x10) { |
|
dock = true; |
|
type &= 0x0F; |
|
} |
|
|
|
if (type >= ARRAY_SIZE(fan_labels)) |
|
type = ARRAY_SIZE(fan_labels) - 1; |
|
|
|
return dock ? docking_labels[type] : fan_labels[type]; |
|
} |
|
|
|
static int dell_smm_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr, |
|
int channel, const char **str) |
|
{ |
|
struct dell_smm_data *data = dev_get_drvdata(dev); |
|
|
|
switch (type) { |
|
case hwmon_temp: |
|
switch (attr) { |
|
case hwmon_temp_label: |
|
*str = temp_labels[data->temp_type[channel]]; |
|
return 0; |
|
default: |
|
break; |
|
} |
|
break; |
|
case hwmon_fan: |
|
switch (attr) { |
|
case hwmon_fan_label: |
|
*str = dell_smm_fan_label(data, channel); |
|
return PTR_ERR_OR_ZERO(*str); |
|
default: |
|
break; |
|
} |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static int dell_smm_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, |
|
long val) |
|
{ |
|
struct dell_smm_data *data = dev_get_drvdata(dev); |
|
unsigned long pwm; |
|
bool enable; |
|
int err; |
|
|
|
switch (type) { |
|
case hwmon_pwm: |
|
switch (attr) { |
|
case hwmon_pwm_input: |
|
pwm = clamp_val(DIV_ROUND_CLOSEST(val, data->i8k_pwm_mult), 0, |
|
data->i8k_fan_max); |
|
|
|
mutex_lock(&data->i8k_mutex); |
|
err = i8k_set_fan(data, channel, pwm); |
|
mutex_unlock(&data->i8k_mutex); |
|
|
|
if (err < 0) |
|
return err; |
|
|
|
return 0; |
|
case hwmon_pwm_enable: |
|
if (!val) |
|
return -EINVAL; |
|
|
|
if (val == 1) |
|
enable = false; |
|
else |
|
enable = true; |
|
|
|
mutex_lock(&data->i8k_mutex); |
|
err = i8k_enable_fan_auto_mode(data, enable); |
|
mutex_unlock(&data->i8k_mutex); |
|
|
|
if (err < 0) |
|
return err; |
|
|
|
return 0; |
|
default: |
|
break; |
|
} |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static const struct hwmon_ops dell_smm_ops = { |
|
.is_visible = dell_smm_is_visible, |
|
.read = dell_smm_read, |
|
.read_string = dell_smm_read_string, |
|
.write = dell_smm_write, |
|
}; |
|
|
|
static const struct hwmon_channel_info *dell_smm_info[] = { |
|
HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ), |
|
HWMON_CHANNEL_INFO(temp, |
|
HWMON_T_INPUT | HWMON_T_LABEL, |
|
HWMON_T_INPUT | HWMON_T_LABEL, |
|
HWMON_T_INPUT | HWMON_T_LABEL, |
|
HWMON_T_INPUT | HWMON_T_LABEL, |
|
HWMON_T_INPUT | HWMON_T_LABEL, |
|
HWMON_T_INPUT | HWMON_T_LABEL, |
|
HWMON_T_INPUT | HWMON_T_LABEL, |
|
HWMON_T_INPUT | HWMON_T_LABEL, |
|
HWMON_T_INPUT | HWMON_T_LABEL, |
|
HWMON_T_INPUT | HWMON_T_LABEL |
|
), |
|
HWMON_CHANNEL_INFO(fan, |
|
HWMON_F_INPUT | HWMON_F_LABEL, |
|
HWMON_F_INPUT | HWMON_F_LABEL, |
|
HWMON_F_INPUT | HWMON_F_LABEL |
|
), |
|
HWMON_CHANNEL_INFO(pwm, |
|
HWMON_PWM_INPUT | HWMON_PWM_ENABLE, |
|
HWMON_PWM_INPUT, |
|
HWMON_PWM_INPUT |
|
), |
|
NULL |
|
}; |
|
|
|
static const struct hwmon_chip_info dell_smm_chip_info = { |
|
.ops = &dell_smm_ops, |
|
.info = dell_smm_info, |
|
}; |
|
|
|
static int __init dell_smm_init_hwmon(struct device *dev) |
|
{ |
|
struct dell_smm_data *data = dev_get_drvdata(dev); |
|
struct device *dell_smm_hwmon_dev; |
|
int i, err; |
|
|
|
for (i = 0; i < DELL_SMM_NO_TEMP; i++) { |
|
data->temp_type[i] = i8k_get_temp_type(i); |
|
if (data->temp_type[i] < 0) |
|
continue; |
|
|
|
if (data->temp_type[i] >= ARRAY_SIZE(temp_labels)) |
|
data->temp_type[i] = ARRAY_SIZE(temp_labels) - 1; |
|
} |
|
|
|
for (i = 0; i < DELL_SMM_NO_FANS; i++) { |
|
data->fan_type[i] = INT_MIN; |
|
err = i8k_get_fan_status(data, i); |
|
if (err < 0) |
|
err = i8k_get_fan_type(data, i); |
|
if (err >= 0) |
|
data->fan[i] = true; |
|
} |
|
|
|
dell_smm_hwmon_dev = devm_hwmon_device_register_with_info(dev, "dell_smm", data, |
|
&dell_smm_chip_info, NULL); |
|
|
|
return PTR_ERR_OR_ZERO(dell_smm_hwmon_dev); |
|
} |
|
|
|
struct i8k_config_data { |
|
uint fan_mult; |
|
uint fan_max; |
|
}; |
|
|
|
enum i8k_configs { |
|
DELL_LATITUDE_D520, |
|
DELL_PRECISION_490, |
|
DELL_STUDIO, |
|
DELL_XPS, |
|
}; |
|
|
|
static const struct i8k_config_data i8k_config_data[] __initconst = { |
|
[DELL_LATITUDE_D520] = { |
|
.fan_mult = 1, |
|
.fan_max = I8K_FAN_TURBO, |
|
}, |
|
[DELL_PRECISION_490] = { |
|
.fan_mult = 1, |
|
.fan_max = I8K_FAN_TURBO, |
|
}, |
|
[DELL_STUDIO] = { |
|
.fan_mult = 1, |
|
.fan_max = I8K_FAN_HIGH, |
|
}, |
|
[DELL_XPS] = { |
|
.fan_mult = 1, |
|
.fan_max = I8K_FAN_HIGH, |
|
}, |
|
}; |
|
|
|
static const struct dmi_system_id i8k_dmi_table[] __initconst = { |
|
{ |
|
.ident = "Dell Inspiron", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), |
|
}, |
|
}, |
|
{ |
|
.ident = "Dell Latitude", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), |
|
}, |
|
}, |
|
{ |
|
.ident = "Dell Inspiron 2", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), |
|
}, |
|
}, |
|
{ |
|
.ident = "Dell Latitude D520", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"), |
|
}, |
|
.driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520], |
|
}, |
|
{ |
|
.ident = "Dell Latitude 2", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), |
|
}, |
|
}, |
|
{ /* UK Inspiron 6400 */ |
|
.ident = "Dell Inspiron 3", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), |
|
}, |
|
}, |
|
{ |
|
.ident = "Dell Inspiron 3", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), |
|
}, |
|
}, |
|
{ |
|
.ident = "Dell Precision 490", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_MATCH(DMI_PRODUCT_NAME, |
|
"Precision WorkStation 490"), |
|
}, |
|
.driver_data = (void *)&i8k_config_data[DELL_PRECISION_490], |
|
}, |
|
{ |
|
.ident = "Dell Precision", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), |
|
}, |
|
}, |
|
{ |
|
.ident = "Dell Vostro", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), |
|
}, |
|
}, |
|
{ |
|
.ident = "Dell Studio", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), |
|
}, |
|
.driver_data = (void *)&i8k_config_data[DELL_STUDIO], |
|
}, |
|
{ |
|
.ident = "Dell XPS M140", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), |
|
}, |
|
.driver_data = (void *)&i8k_config_data[DELL_XPS], |
|
}, |
|
{ |
|
.ident = "Dell XPS", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "XPS"), |
|
}, |
|
}, |
|
{ } |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(dmi, i8k_dmi_table); |
|
|
|
/* |
|
* On some machines once I8K_SMM_GET_FAN_TYPE is issued then CPU fan speed |
|
* randomly going up and down due to bug in Dell SMM or BIOS. Here is blacklist |
|
* of affected Dell machines for which we disallow I8K_SMM_GET_FAN_TYPE call. |
|
* See bug: https://bugzilla.kernel.org/show_bug.cgi?id=100121 |
|
*/ |
|
static const struct dmi_system_id i8k_blacklist_fan_type_dmi_table[] __initconst = { |
|
{ |
|
.ident = "Dell Studio XPS 8000", |
|
.matches = { |
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Studio XPS 8000"), |
|
}, |
|
}, |
|
{ |
|
.ident = "Dell Studio XPS 8100", |
|
.matches = { |
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Studio XPS 8100"), |
|
}, |
|
}, |
|
{ |
|
.ident = "Dell Inspiron 580", |
|
.matches = { |
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Inspiron 580 "), |
|
}, |
|
}, |
|
{ } |
|
}; |
|
|
|
/* |
|
* On some machines all fan related SMM functions implemented by Dell BIOS |
|
* firmware freeze kernel for about 500ms. Until Dell fixes these problems fan |
|
* support for affected blacklisted Dell machines stay disabled. |
|
* See bug: https://bugzilla.kernel.org/show_bug.cgi?id=195751 |
|
*/ |
|
static const struct dmi_system_id i8k_blacklist_fan_support_dmi_table[] __initconst = { |
|
{ |
|
.ident = "Dell Inspiron 7720", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"), |
|
}, |
|
}, |
|
{ |
|
.ident = "Dell Vostro 3360", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"), |
|
}, |
|
}, |
|
{ |
|
.ident = "Dell XPS13 9333", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"), |
|
}, |
|
}, |
|
{ |
|
.ident = "Dell XPS 15 L502X", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L502X"), |
|
}, |
|
}, |
|
{ } |
|
}; |
|
|
|
struct i8k_fan_control_data { |
|
unsigned int manual_fan; |
|
unsigned int auto_fan; |
|
}; |
|
|
|
enum i8k_fan_controls { |
|
I8K_FAN_34A3_35A3, |
|
}; |
|
|
|
static const struct i8k_fan_control_data i8k_fan_control_data[] __initconst = { |
|
[I8K_FAN_34A3_35A3] = { |
|
.manual_fan = 0x34a3, |
|
.auto_fan = 0x35a3, |
|
}, |
|
}; |
|
|
|
static const struct dmi_system_id i8k_whitelist_fan_control[] __initconst = { |
|
{ |
|
.ident = "Dell Latitude 5480", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Latitude 5480"), |
|
}, |
|
.driver_data = (void *)&i8k_fan_control_data[I8K_FAN_34A3_35A3], |
|
}, |
|
{ |
|
.ident = "Dell Latitude E6440", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Latitude E6440"), |
|
}, |
|
.driver_data = (void *)&i8k_fan_control_data[I8K_FAN_34A3_35A3], |
|
}, |
|
{ |
|
.ident = "Dell Latitude E7440", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Latitude E7440"), |
|
}, |
|
.driver_data = (void *)&i8k_fan_control_data[I8K_FAN_34A3_35A3], |
|
}, |
|
{ |
|
.ident = "Dell Precision 5530", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Precision 5530"), |
|
}, |
|
.driver_data = (void *)&i8k_fan_control_data[I8K_FAN_34A3_35A3], |
|
}, |
|
{ |
|
.ident = "Dell Precision 7510", |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Precision 7510"), |
|
}, |
|
.driver_data = (void *)&i8k_fan_control_data[I8K_FAN_34A3_35A3], |
|
}, |
|
{ } |
|
}; |
|
|
|
static int __init dell_smm_probe(struct platform_device *pdev) |
|
{ |
|
struct dell_smm_data *data; |
|
const struct dmi_system_id *id, *fan_control; |
|
int fan, ret; |
|
|
|
data = devm_kzalloc(&pdev->dev, sizeof(struct dell_smm_data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
mutex_init(&data->i8k_mutex); |
|
data->i8k_fan_mult = I8K_FAN_MULT; |
|
data->i8k_fan_max = I8K_FAN_HIGH; |
|
platform_set_drvdata(pdev, data); |
|
|
|
if (dmi_check_system(i8k_blacklist_fan_support_dmi_table)) { |
|
dev_warn(&pdev->dev, "broken Dell BIOS detected, disallow fan support\n"); |
|
if (!force) |
|
data->disallow_fan_support = true; |
|
} |
|
|
|
if (dmi_check_system(i8k_blacklist_fan_type_dmi_table)) { |
|
dev_warn(&pdev->dev, "broken Dell BIOS detected, disallow fan type call\n"); |
|
if (!force) |
|
data->disallow_fan_type_call = true; |
|
} |
|
|
|
strscpy(data->bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), |
|
sizeof(data->bios_version)); |
|
strscpy(data->bios_machineid, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
|
sizeof(data->bios_machineid)); |
|
|
|
/* |
|
* Set fan multiplier and maximal fan speed from dmi config |
|
* Values specified in module parameters override values from dmi |
|
*/ |
|
id = dmi_first_match(i8k_dmi_table); |
|
if (id && id->driver_data) { |
|
const struct i8k_config_data *conf = id->driver_data; |
|
|
|
if (!fan_mult && conf->fan_mult) |
|
fan_mult = conf->fan_mult; |
|
|
|
if (!fan_max && conf->fan_max) |
|
fan_max = conf->fan_max; |
|
} |
|
|
|
data->i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */ |
|
data->i8k_pwm_mult = DIV_ROUND_UP(255, data->i8k_fan_max); |
|
|
|
fan_control = dmi_first_match(i8k_whitelist_fan_control); |
|
if (fan_control && fan_control->driver_data) { |
|
const struct i8k_fan_control_data *control = fan_control->driver_data; |
|
|
|
data->manual_fan = control->manual_fan; |
|
data->auto_fan = control->auto_fan; |
|
dev_info(&pdev->dev, "enabling support for setting automatic/manual fan control\n"); |
|
} |
|
|
|
if (!fan_mult) { |
|
/* |
|
* Autodetect fan multiplier based on nominal rpm |
|
* If fan reports rpm value too high then set multiplier to 1 |
|
*/ |
|
for (fan = 0; fan < DELL_SMM_NO_FANS; ++fan) { |
|
ret = i8k_get_fan_nominal_speed(data, fan, data->i8k_fan_max); |
|
if (ret < 0) |
|
continue; |
|
|
|
if (ret > I8K_FAN_MAX_RPM) |
|
data->i8k_fan_mult = 1; |
|
break; |
|
} |
|
} else { |
|
/* Fan multiplier was specified in module param or in dmi */ |
|
data->i8k_fan_mult = fan_mult; |
|
} |
|
|
|
ret = dell_smm_init_hwmon(&pdev->dev); |
|
if (ret) |
|
return ret; |
|
|
|
i8k_init_procfs(&pdev->dev); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver dell_smm_driver = { |
|
.driver = { |
|
.name = KBUILD_MODNAME, |
|
}, |
|
}; |
|
|
|
static struct platform_device *dell_smm_device; |
|
|
|
/* |
|
* Probe for the presence of a supported laptop. |
|
*/ |
|
static int __init i8k_init(void) |
|
{ |
|
/* |
|
* Get DMI information |
|
*/ |
|
if (!dmi_check_system(i8k_dmi_table)) { |
|
if (!ignore_dmi && !force) |
|
return -ENODEV; |
|
|
|
pr_info("not running on a supported Dell system.\n"); |
|
pr_info("vendor=%s, model=%s, version=%s\n", |
|
i8k_get_dmi_data(DMI_SYS_VENDOR), |
|
i8k_get_dmi_data(DMI_PRODUCT_NAME), |
|
i8k_get_dmi_data(DMI_BIOS_VERSION)); |
|
} |
|
|
|
/* |
|
* Get SMM Dell signature |
|
*/ |
|
if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
|
i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { |
|
pr_err("unable to get SMM Dell signature\n"); |
|
if (!force) |
|
return -ENODEV; |
|
} |
|
|
|
dell_smm_device = platform_create_bundle(&dell_smm_driver, dell_smm_probe, NULL, 0, NULL, |
|
0); |
|
|
|
return PTR_ERR_OR_ZERO(dell_smm_device); |
|
} |
|
|
|
static void __exit i8k_exit(void) |
|
{ |
|
platform_device_unregister(dell_smm_device); |
|
platform_driver_unregister(&dell_smm_driver); |
|
} |
|
|
|
module_init(i8k_init); |
|
module_exit(i8k_exit);
|
|
|