^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Device driver for the i2c thermostat found on the iBook G4, Albook G4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2003, 2004 Colin Leroy, Rasmus Rohde, Benjamin Herrenschmidt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Documentation from 115254175ADT7467_pra.pdf and 3686221171167ADT7460_b.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * https://www.onsemi.com/PowerSolutions/product.do?id=ADT7467
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * https://www.onsemi.com/PowerSolutions/product.do?id=ADT7460
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/suspend.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/kthread.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/freezer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <asm/machdep.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #undef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define CONFIG_REG 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define MANUAL_MASK 0xe0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define AUTO_MASK 0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define INVERT_MASK 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static u8 TEMP_REG[3] = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static u8 LIMIT_REG[3] = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static u8 MANUAL_MODE[2] = {0x5c, 0x5d};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static u8 REM_CONTROL[2] = {0x00, 0x40};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static u8 FAN_SPEED[2] = {0x28, 0x2a};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static u8 FAN_SPD_SET[2] = {0x30, 0x31};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static u8 default_limits_local[3] = {70, 50, 70}; /* local, sensor1, sensor2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static u8 default_limits_chip[3] = {80, 65, 80}; /* local, sensor1, sensor2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static const char *sensor_location[3] = { "?", "?", "?" };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static int limit_adjust;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static int fan_speed = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static bool verbose;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) MODULE_AUTHOR("Colin Leroy <colin@colino.net>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) MODULE_DESCRIPTION("Driver for ADT746x thermostat in iBook G4 and "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) "Powerbook G4 Alu");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) module_param(limit_adjust, int, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) MODULE_PARM_DESC(limit_adjust,"Adjust maximum temperatures (50 sensor1, 70 sensor2) "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) "by N degrees.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) module_param(fan_speed, int, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) MODULE_PARM_DESC(fan_speed,"Specify starting fan speed (0-255) "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) "(default 64)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) module_param(verbose, bool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) MODULE_PARM_DESC(verbose,"Verbose log operations "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) "(default 0)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct thermostat {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct i2c_client *clt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) u8 temps[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) u8 cached_temp[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) u8 initial_limits[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) u8 limits[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) int last_speed[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int last_var[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) int pwm_inv[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct task_struct *thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct platform_device *pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) ADT7460,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) ADT7467
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) } type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static void write_both_fan_speed(struct thermostat *th, int speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static void write_fan_speed(struct thermostat *th, int speed, int fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) write_reg(struct thermostat* th, int reg, u8 data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) u8 tmp[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) tmp[0] = reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) tmp[1] = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) rc = i2c_master_send(th->clt, (const char *)tmp, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (rc != 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) read_reg(struct thermostat* th, int reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) u8 reg_addr, data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) reg_addr = (u8)reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) rc = i2c_master_send(th->clt, ®_addr, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (rc != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) rc = i2c_master_recv(th->clt, (char *)&data, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static int read_fan_speed(struct thermostat *th, u8 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) u8 tmp[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) u16 res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /* should start with low byte */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) tmp[1] = read_reg(th, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) tmp[0] = read_reg(th, addr + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) res = tmp[1] + (tmp[0] << 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /* "a value of 0xffff means that the fan has stopped" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return (res == 0xffff ? 0 : (90000*60)/res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static void write_both_fan_speed(struct thermostat *th, int speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) write_fan_speed(th, speed, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (th->type == ADT7460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) write_fan_speed(th, speed, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static void write_fan_speed(struct thermostat *th, int speed, int fan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) u8 manual;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (speed > 0xff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) speed = 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) else if (speed < -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) speed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (th->type == ADT7467 && fan == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (th->last_speed[fan] != speed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) if (verbose) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (speed == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) printk(KERN_DEBUG "adt746x: Setting speed to automatic "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) "for %s fan.\n", sensor_location[fan+1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) printk(KERN_DEBUG "adt746x: Setting speed to %d "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) "for %s fan.\n", speed, sensor_location[fan+1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (speed >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) manual = read_reg(th, MANUAL_MODE[fan]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) manual &= ~INVERT_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) write_reg(th, MANUAL_MODE[fan],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) manual | MANUAL_MASK | th->pwm_inv[fan]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) write_reg(th, FAN_SPD_SET[fan], speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /* back to automatic */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if(th->type == ADT7460) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) manual = read_reg(th,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) MANUAL_MODE[fan]) & (~MANUAL_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) manual &= ~INVERT_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) manual |= th->pwm_inv[fan];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) write_reg(th,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) MANUAL_MODE[fan], manual|REM_CONTROL[fan]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) manual = read_reg(th, MANUAL_MODE[fan]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) manual &= ~INVERT_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) manual |= th->pwm_inv[fan];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) write_reg(th, MANUAL_MODE[fan], manual&(~AUTO_MASK));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) th->last_speed[fan] = speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static void read_sensors(struct thermostat *th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) int i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) for (i = 0; i < 3; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) th->temps[i] = read_reg(th, TEMP_REG[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static void display_stats(struct thermostat *th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (th->temps[0] != th->cached_temp[0]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) || th->temps[1] != th->cached_temp[1]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) || th->temps[2] != th->cached_temp[2]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) printk(KERN_INFO "adt746x: Temperature infos:"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) " thermostats: %d,%d,%d;"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) " limits: %d,%d,%d;"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) " fan speed: %d RPM\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) th->temps[0], th->temps[1], th->temps[2],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) th->limits[0], th->limits[1], th->limits[2],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) read_fan_speed(th, FAN_SPEED[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) th->cached_temp[0] = th->temps[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) th->cached_temp[1] = th->temps[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) th->cached_temp[2] = th->temps[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static void update_fans_speed (struct thermostat *th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) int lastvar = 0; /* last variation, for iBook */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) int i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) /* we don't care about local sensor, so we start at sensor 1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) for (i = 1; i < 3; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) bool started = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) int fan_number = (th->type == ADT7460 && i == 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) int var = th->temps[i] - th->limits[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (var > -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) int step = (255 - fan_speed) / 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) int new_speed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /* hysteresis : change fan speed only if variation is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * more than two degrees */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (abs(var - th->last_var[fan_number]) < 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) started = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) new_speed = fan_speed + ((var-1)*step);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (new_speed < fan_speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) new_speed = fan_speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (new_speed > 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) new_speed = 255;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (verbose)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) printk(KERN_DEBUG "adt746x: Setting fans speed to %d "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) "(limit exceeded by %d on %s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) new_speed, var,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) sensor_location[fan_number+1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) write_both_fan_speed(th, new_speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) th->last_var[fan_number] = var;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) } else if (var < -2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) /* don't stop fan if sensor2 is cold and sensor1 is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * so cold (lastvar >= -1) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) if (i == 2 && lastvar < -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (th->last_speed[fan_number] != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (verbose)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) printk(KERN_DEBUG "adt746x: Stopping "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) "fans.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) write_both_fan_speed(th, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) lastvar = var;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (started)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) return; /* we don't want to re-stop the fan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) * if sensor1 is heating and sensor2 is not */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static int monitor_task(void *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) struct thermostat* th = arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) set_freezable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) while(!kthread_should_stop()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) try_to_freeze();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) msleep_interruptible(2000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) #ifndef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (fan_speed != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) read_sensors(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) read_sensors(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (fan_speed != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) update_fans_speed(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) display_stats(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) static void set_limit(struct thermostat *th, int i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) /* Set sensor1 limit higher to avoid powerdowns */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) th->limits[i] = default_limits_chip[i] + limit_adjust;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) write_reg(th, LIMIT_REG[i], th->limits[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) /* set our limits to normal */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) th->limits[i] = default_limits_local[i] + limit_adjust;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) #define BUILD_SHOW_FUNC_INT(name, data) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) struct thermostat *th = dev_get_drvdata(dev); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) return sprintf(buf, "%d\n", data); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) #define BUILD_SHOW_FUNC_INT_LITE(name, data) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return sprintf(buf, "%d\n", data); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) #define BUILD_SHOW_FUNC_STR(name, data) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return sprintf(buf, "%s\n", data); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) #define BUILD_SHOW_FUNC_FAN(name, data) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) struct thermostat *th = dev_get_drvdata(dev); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) return sprintf(buf, "%d (%d rpm)\n", \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) th->last_speed[data], \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) read_fan_speed(th, FAN_SPEED[data]) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) ); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) #define BUILD_STORE_FUNC_DEG(name, data) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) struct thermostat *th = dev_get_drvdata(dev); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) int val; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) int i; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) val = simple_strtol(buf, NULL, 10); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) printk(KERN_INFO "Adjusting limits by %d degrees\n", val); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) limit_adjust = val; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) for (i=0; i < 3; i++) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) set_limit(th, i); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return n; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) #define BUILD_STORE_FUNC_INT(name, data) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) int val; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) val = simple_strtol(buf, NULL, 10); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (val < 0 || val > 255) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return -EINVAL; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) printk(KERN_INFO "Setting specified fan speed to %d\n", val); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) data = val; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) return n; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) BUILD_SHOW_FUNC_INT(sensor1_temperature, (read_reg(th, TEMP_REG[1])))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) BUILD_SHOW_FUNC_INT(sensor2_temperature, (read_reg(th, TEMP_REG[2])))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) BUILD_SHOW_FUNC_INT(sensor1_limit, th->limits[1])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) BUILD_SHOW_FUNC_INT(sensor2_limit, th->limits[2])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) BUILD_SHOW_FUNC_STR(sensor1_location, sensor_location[1])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) BUILD_SHOW_FUNC_STR(sensor2_location, sensor_location[2])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) BUILD_SHOW_FUNC_INT_LITE(specified_fan_speed, fan_speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) BUILD_SHOW_FUNC_FAN(sensor1_fan_speed, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) BUILD_SHOW_FUNC_FAN(sensor2_fan_speed, 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) BUILD_SHOW_FUNC_INT_LITE(limit_adjust, limit_adjust)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) BUILD_STORE_FUNC_DEG(limit_adjust, th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) static DEVICE_ATTR(sensor1_temperature, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) show_sensor1_temperature,NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) static DEVICE_ATTR(sensor2_temperature, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) show_sensor2_temperature,NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) static DEVICE_ATTR(sensor1_limit, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) show_sensor1_limit, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) static DEVICE_ATTR(sensor2_limit, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) show_sensor2_limit, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) static DEVICE_ATTR(sensor1_location, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) show_sensor1_location, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) static DEVICE_ATTR(sensor2_location, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) show_sensor2_location, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) static DEVICE_ATTR(specified_fan_speed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) show_specified_fan_speed,store_specified_fan_speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static DEVICE_ATTR(sensor1_fan_speed, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) show_sensor1_fan_speed, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) static DEVICE_ATTR(sensor2_fan_speed, S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) show_sensor2_fan_speed, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) static DEVICE_ATTR(limit_adjust, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) show_limit_adjust, store_limit_adjust);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) static void thermostat_create_files(struct thermostat *th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) struct device_node *np = th->clt->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) /* To maintain ABI compatibility with userspace, create
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * the old style platform driver and attach the attributes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * to it here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) th->pdev = of_platform_device_create(np, "temperatures", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) if (!th->pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) dev = &th->pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) dev_set_drvdata(dev, th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) err = device_create_file(dev, &dev_attr_sensor1_temperature);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) err |= device_create_file(dev, &dev_attr_sensor2_temperature);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) err |= device_create_file(dev, &dev_attr_sensor1_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) err |= device_create_file(dev, &dev_attr_sensor2_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) err |= device_create_file(dev, &dev_attr_sensor1_location);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) err |= device_create_file(dev, &dev_attr_sensor2_location);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) err |= device_create_file(dev, &dev_attr_limit_adjust);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) err |= device_create_file(dev, &dev_attr_specified_fan_speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) err |= device_create_file(dev, &dev_attr_sensor1_fan_speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if(th->type == ADT7460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) err |= device_create_file(dev, &dev_attr_sensor2_fan_speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) printk(KERN_WARNING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) "Failed to create temperature attribute file(s).\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) static void thermostat_remove_files(struct thermostat *th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) if (!th->pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) dev = &th->pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) device_remove_file(dev, &dev_attr_sensor1_temperature);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) device_remove_file(dev, &dev_attr_sensor2_temperature);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) device_remove_file(dev, &dev_attr_sensor1_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) device_remove_file(dev, &dev_attr_sensor2_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) device_remove_file(dev, &dev_attr_sensor1_location);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) device_remove_file(dev, &dev_attr_sensor2_location);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) device_remove_file(dev, &dev_attr_limit_adjust);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) device_remove_file(dev, &dev_attr_specified_fan_speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) device_remove_file(dev, &dev_attr_sensor1_fan_speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) if (th->type == ADT7460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) device_remove_file(dev, &dev_attr_sensor2_fan_speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) of_device_unregister(th->pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) static int probe_thermostat(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) struct device_node *np = client->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) struct thermostat* th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) const __be32 *prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) int i, rc, vers, offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) if (!np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) prop = of_get_property(np, "hwsensor-params-version", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) if (!prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) vers = be32_to_cpup(prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) printk(KERN_INFO "adt746x: version %d (%ssupported)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) vers, vers == 1 ? "" : "un");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (vers != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if (of_get_property(np, "hwsensor-location", NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) for (i = 0; i < 3; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) sensor_location[i] = of_get_property(np,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) "hwsensor-location", NULL) + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if (sensor_location[i] == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) sensor_location[i] = "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) offset += strlen(sensor_location[i]) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) th = kzalloc(sizeof(struct thermostat), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) if (!th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) i2c_set_clientdata(client, th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) th->clt = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) th->type = id->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) rc = read_reg(th, CONFIG_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) if (rc < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) dev_err(&client->dev, "Thermostat failed to read config!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) kfree(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) /* force manual control to start the fan quieter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) if (fan_speed == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) fan_speed = 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (th->type == ADT7460) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) printk(KERN_INFO "adt746x: ADT7460 initializing\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) /* The 7460 needs to be started explicitly */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) write_reg(th, CONFIG_REG, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) printk(KERN_INFO "adt746x: ADT7467 initializing\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) for (i = 0; i < 3; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) th->initial_limits[i] = read_reg(th, LIMIT_REG[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) set_limit(th, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) " to %d, %d, %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) th->initial_limits[0], th->initial_limits[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) th->initial_limits[2], th->limits[0], th->limits[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) th->limits[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) /* record invert bit status because fw can corrupt it after suspend */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) th->pwm_inv[0] = read_reg(th, MANUAL_MODE[0]) & INVERT_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) th->pwm_inv[1] = read_reg(th, MANUAL_MODE[1]) & INVERT_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) /* be sure to really write fan speed the first time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) th->last_speed[0] = -2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) th->last_speed[1] = -2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) th->last_var[0] = -80;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) th->last_var[1] = -80;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) if (fan_speed != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) /* manual mode, stop fans */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) write_both_fan_speed(th, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) /* automatic mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) write_both_fan_speed(th, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) th->thread = kthread_run(monitor_task, th, "kfand");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) if (th->thread == ERR_PTR(-ENOMEM)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) printk(KERN_INFO "adt746x: Kthread creation failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) th->thread = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) thermostat_create_files(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) static int remove_thermostat(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) struct thermostat *th = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) thermostat_remove_files(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (th->thread != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) kthread_stop(th->thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) printk(KERN_INFO "adt746x: Putting max temperatures back from "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) "%d, %d, %d to %d, %d, %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) th->limits[0], th->limits[1], th->limits[2],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) th->initial_limits[0], th->initial_limits[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) th->initial_limits[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) for (i = 0; i < 3; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) write_reg(th, LIMIT_REG[i], th->initial_limits[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) write_both_fan_speed(th, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) kfree(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) static const struct i2c_device_id therm_adt746x_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) { "MAC,adt7460", ADT7460 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) { "MAC,adt7467", ADT7467 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) MODULE_DEVICE_TABLE(i2c, therm_adt746x_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) static struct i2c_driver thermostat_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) .name = "therm_adt746x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) .probe = probe_thermostat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) .remove = remove_thermostat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) .id_table = therm_adt746x_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) static int __init thermostat_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) #ifndef CONFIG_I2C_POWERMAC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) request_module("i2c-powermac");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) return i2c_add_driver(&thermostat_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) static void __exit thermostat_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) i2c_del_driver(&thermostat_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) module_init(thermostat_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) module_exit(thermostat_exit);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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