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949 lines
24 KiB
949 lines
24 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* smsc47m1.c - Part of lm_sensors, Linux kernel modules |
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* for hardware monitoring |
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* |
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* Supports the SMSC LPC47B27x, LPC47M10x, LPC47M112, LPC47M13x, |
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* LPC47M14x, LPC47M15x, LPC47M192, LPC47M292 and LPC47M997 |
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* Super-I/O chips. |
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* |
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* Copyright (C) 2002 Mark D. Studebaker <[email protected]> |
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* Copyright (C) 2004-2007 Jean Delvare <[email protected]> |
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* Ported to Linux 2.6 by Gabriele Gorla <[email protected]> |
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* and Jean Delvare |
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*/ |
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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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|
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/ioport.h> |
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#include <linux/jiffies.h> |
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#include <linux/platform_device.h> |
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#include <linux/hwmon.h> |
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#include <linux/hwmon-sysfs.h> |
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#include <linux/err.h> |
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#include <linux/init.h> |
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#include <linux/mutex.h> |
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#include <linux/sysfs.h> |
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#include <linux/acpi.h> |
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#include <linux/io.h> |
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static unsigned short force_id; |
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module_param(force_id, ushort, 0); |
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MODULE_PARM_DESC(force_id, "Override the detected device ID"); |
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static struct platform_device *pdev; |
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#define DRVNAME "smsc47m1" |
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enum chips { smsc47m1, smsc47m2 }; |
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|
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/* Super-I/0 registers and commands */ |
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|
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#define REG 0x2e /* The register to read/write */ |
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#define VAL 0x2f /* The value to read/write */ |
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static inline void |
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superio_outb(int reg, int val) |
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{ |
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outb(reg, REG); |
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outb(val, VAL); |
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} |
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static inline int |
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superio_inb(int reg) |
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{ |
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outb(reg, REG); |
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return inb(VAL); |
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} |
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|
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/* logical device for fans is 0x0A */ |
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#define superio_select() superio_outb(0x07, 0x0A) |
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static inline int |
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superio_enter(void) |
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{ |
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if (!request_muxed_region(REG, 2, DRVNAME)) |
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return -EBUSY; |
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outb(0x55, REG); |
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return 0; |
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} |
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static inline void |
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superio_exit(void) |
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{ |
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outb(0xAA, REG); |
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release_region(REG, 2); |
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} |
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#define SUPERIO_REG_ACT 0x30 |
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#define SUPERIO_REG_BASE 0x60 |
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#define SUPERIO_REG_DEVID 0x20 |
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#define SUPERIO_REG_DEVREV 0x21 |
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|
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/* Logical device registers */ |
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#define SMSC_EXTENT 0x80 |
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|
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/* nr is 0 or 1 in the macros below */ |
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#define SMSC47M1_REG_ALARM 0x04 |
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#define SMSC47M1_REG_TPIN(nr) (0x34 - (nr)) |
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#define SMSC47M1_REG_PPIN(nr) (0x36 - (nr)) |
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#define SMSC47M1_REG_FANDIV 0x58 |
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static const u8 SMSC47M1_REG_FAN[3] = { 0x59, 0x5a, 0x6b }; |
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static const u8 SMSC47M1_REG_FAN_PRELOAD[3] = { 0x5b, 0x5c, 0x6c }; |
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static const u8 SMSC47M1_REG_PWM[3] = { 0x56, 0x57, 0x69 }; |
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#define SMSC47M2_REG_ALARM6 0x09 |
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#define SMSC47M2_REG_TPIN1 0x38 |
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#define SMSC47M2_REG_TPIN2 0x37 |
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#define SMSC47M2_REG_TPIN3 0x2d |
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#define SMSC47M2_REG_PPIN3 0x2c |
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#define SMSC47M2_REG_FANDIV3 0x6a |
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#define MIN_FROM_REG(reg, div) ((reg) >= 192 ? 0 : \ |
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983040 / ((192 - (reg)) * (div))) |
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#define FAN_FROM_REG(reg, div, preload) ((reg) <= (preload) || (reg) == 255 ? \ |
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0 : \ |
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983040 / (((reg) - (preload)) * (div))) |
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#define DIV_FROM_REG(reg) (1 << (reg)) |
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#define PWM_FROM_REG(reg) (((reg) & 0x7E) << 1) |
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#define PWM_EN_FROM_REG(reg) ((~(reg)) & 0x01) |
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#define PWM_TO_REG(reg) (((reg) >> 1) & 0x7E) |
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struct smsc47m1_data { |
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unsigned short addr; |
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const char *name; |
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enum chips type; |
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struct device *hwmon_dev; |
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struct mutex update_lock; |
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unsigned long last_updated; /* In jiffies */ |
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u8 fan[3]; /* Register value */ |
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u8 fan_preload[3]; /* Register value */ |
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u8 fan_div[3]; /* Register encoding, shifted right */ |
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u8 alarms; /* Register encoding */ |
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u8 pwm[3]; /* Register value (bit 0 is disable) */ |
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}; |
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struct smsc47m1_sio_data { |
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enum chips type; |
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u8 activate; /* Remember initial device state */ |
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}; |
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static inline int smsc47m1_read_value(struct smsc47m1_data *data, u8 reg) |
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{ |
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return inb_p(data->addr + reg); |
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} |
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static inline void smsc47m1_write_value(struct smsc47m1_data *data, u8 reg, |
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u8 value) |
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{ |
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outb_p(value, data->addr + reg); |
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} |
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static struct smsc47m1_data *smsc47m1_update_device(struct device *dev, |
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int init) |
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{ |
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struct smsc47m1_data *data = dev_get_drvdata(dev); |
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mutex_lock(&data->update_lock); |
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if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) { |
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int i, fan_nr; |
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fan_nr = data->type == smsc47m2 ? 3 : 2; |
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for (i = 0; i < fan_nr; i++) { |
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data->fan[i] = smsc47m1_read_value(data, |
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SMSC47M1_REG_FAN[i]); |
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data->fan_preload[i] = smsc47m1_read_value(data, |
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SMSC47M1_REG_FAN_PRELOAD[i]); |
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data->pwm[i] = smsc47m1_read_value(data, |
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SMSC47M1_REG_PWM[i]); |
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} |
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i = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV); |
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data->fan_div[0] = (i >> 4) & 0x03; |
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data->fan_div[1] = i >> 6; |
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data->alarms = smsc47m1_read_value(data, |
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SMSC47M1_REG_ALARM) >> 6; |
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/* Clear alarms if needed */ |
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if (data->alarms) |
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smsc47m1_write_value(data, SMSC47M1_REG_ALARM, 0xC0); |
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if (fan_nr >= 3) { |
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data->fan_div[2] = (smsc47m1_read_value(data, |
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SMSC47M2_REG_FANDIV3) >> 4) & 0x03; |
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data->alarms |= (smsc47m1_read_value(data, |
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SMSC47M2_REG_ALARM6) & 0x40) >> 4; |
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/* Clear alarm if needed */ |
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if (data->alarms & 0x04) |
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smsc47m1_write_value(data, |
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SMSC47M2_REG_ALARM6, |
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0x40); |
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} |
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data->last_updated = jiffies; |
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} |
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mutex_unlock(&data->update_lock); |
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return data; |
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} |
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static ssize_t fan_show(struct device *dev, struct device_attribute *devattr, |
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char *buf) |
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{ |
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
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struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
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int nr = attr->index; |
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/* |
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* This chip (stupidly) stops monitoring fan speed if PWM is |
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* enabled and duty cycle is 0%. This is fine if the monitoring |
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* and control concern the same fan, but troublesome if they are |
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* not (which could as well happen). |
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*/ |
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int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 : |
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FAN_FROM_REG(data->fan[nr], |
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DIV_FROM_REG(data->fan_div[nr]), |
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data->fan_preload[nr]); |
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return sprintf(buf, "%d\n", rpm); |
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} |
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static ssize_t fan_min_show(struct device *dev, |
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struct device_attribute *devattr, char *buf) |
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{ |
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
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struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
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int nr = attr->index; |
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int rpm = MIN_FROM_REG(data->fan_preload[nr], |
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DIV_FROM_REG(data->fan_div[nr])); |
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return sprintf(buf, "%d\n", rpm); |
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} |
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static ssize_t fan_div_show(struct device *dev, |
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struct device_attribute *devattr, char *buf) |
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{ |
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
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struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
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return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); |
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} |
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static ssize_t fan_alarm_show(struct device *dev, |
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struct device_attribute *devattr, char *buf) |
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{ |
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int bitnr = to_sensor_dev_attr(devattr)->index; |
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struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
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return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); |
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} |
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static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr, |
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char *buf) |
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{ |
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
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struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
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return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[attr->index])); |
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} |
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static ssize_t pwm_en_show(struct device *dev, |
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struct device_attribute *devattr, char *buf) |
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{ |
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
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struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
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return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[attr->index])); |
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} |
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static ssize_t alarms_show(struct device *dev, |
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struct device_attribute *devattr, char *buf) |
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{ |
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struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
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return sprintf(buf, "%d\n", data->alarms); |
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} |
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static ssize_t fan_min_store(struct device *dev, |
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struct device_attribute *devattr, |
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const char *buf, size_t count) |
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{ |
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
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struct smsc47m1_data *data = dev_get_drvdata(dev); |
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int nr = attr->index; |
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long rpmdiv; |
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long val; |
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int err; |
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err = kstrtol(buf, 10, &val); |
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if (err) |
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return err; |
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mutex_lock(&data->update_lock); |
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rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]); |
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if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) { |
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mutex_unlock(&data->update_lock); |
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return -EINVAL; |
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} |
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data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv); |
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smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr], |
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data->fan_preload[nr]); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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/* |
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* Note: we save and restore the fan minimum here, because its value is |
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* determined in part by the fan clock divider. This follows the principle |
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* of least surprise; the user doesn't expect the fan minimum to change just |
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* because the divider changed. |
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*/ |
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static ssize_t fan_div_store(struct device *dev, |
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struct device_attribute *devattr, |
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const char *buf, size_t count) |
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{ |
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
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struct smsc47m1_data *data = dev_get_drvdata(dev); |
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int nr = attr->index; |
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long new_div; |
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int err; |
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long tmp; |
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u8 old_div = DIV_FROM_REG(data->fan_div[nr]); |
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err = kstrtol(buf, 10, &new_div); |
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if (err) |
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return err; |
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if (new_div == old_div) /* No change */ |
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return count; |
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mutex_lock(&data->update_lock); |
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switch (new_div) { |
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case 1: |
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data->fan_div[nr] = 0; |
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break; |
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case 2: |
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data->fan_div[nr] = 1; |
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break; |
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case 4: |
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data->fan_div[nr] = 2; |
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break; |
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case 8: |
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data->fan_div[nr] = 3; |
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break; |
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default: |
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mutex_unlock(&data->update_lock); |
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return -EINVAL; |
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} |
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switch (nr) { |
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case 0: |
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case 1: |
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tmp = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV) |
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& ~(0x03 << (4 + 2 * nr)); |
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tmp |= data->fan_div[nr] << (4 + 2 * nr); |
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smsc47m1_write_value(data, SMSC47M1_REG_FANDIV, tmp); |
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break; |
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case 2: |
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tmp = smsc47m1_read_value(data, SMSC47M2_REG_FANDIV3) & 0xCF; |
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tmp |= data->fan_div[2] << 4; |
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smsc47m1_write_value(data, SMSC47M2_REG_FANDIV3, tmp); |
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break; |
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default: |
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BUG(); |
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} |
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/* Preserve fan min */ |
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tmp = 192 - (old_div * (192 - data->fan_preload[nr]) |
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+ new_div / 2) / new_div; |
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data->fan_preload[nr] = clamp_val(tmp, 0, 191); |
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smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr], |
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data->fan_preload[nr]); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr, |
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const char *buf, size_t count) |
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{ |
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
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struct smsc47m1_data *data = dev_get_drvdata(dev); |
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int nr = attr->index; |
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long val; |
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int err; |
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err = kstrtol(buf, 10, &val); |
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if (err) |
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return err; |
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if (val < 0 || val > 255) |
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return -EINVAL; |
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mutex_lock(&data->update_lock); |
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data->pwm[nr] &= 0x81; /* Preserve additional bits */ |
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data->pwm[nr] |= PWM_TO_REG(val); |
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smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr], |
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data->pwm[nr]); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static ssize_t pwm_en_store(struct device *dev, |
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struct device_attribute *devattr, const char *buf, |
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size_t count) |
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{ |
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
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struct smsc47m1_data *data = dev_get_drvdata(dev); |
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int nr = attr->index; |
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unsigned long val; |
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int err; |
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err = kstrtoul(buf, 10, &val); |
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if (err) |
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return err; |
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if (val > 1) |
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return -EINVAL; |
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mutex_lock(&data->update_lock); |
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data->pwm[nr] &= 0xFE; /* preserve the other bits */ |
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data->pwm[nr] |= !val; |
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smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr], |
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data->pwm[nr]); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); |
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static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); |
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static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); |
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static SENSOR_DEVICE_ATTR_RO(fan1_alarm, fan_alarm, 0); |
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static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0); |
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static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_en, 0); |
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static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); |
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static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); |
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static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); |
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static SENSOR_DEVICE_ATTR_RO(fan2_alarm, fan_alarm, 1); |
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static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1); |
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static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_en, 1); |
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static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2); |
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static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2); |
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static SENSOR_DEVICE_ATTR_RW(fan3_div, fan_div, 2); |
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static SENSOR_DEVICE_ATTR_RO(fan3_alarm, fan_alarm, 2); |
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static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2); |
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static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_en, 2); |
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|
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static DEVICE_ATTR_RO(alarms); |
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static ssize_t name_show(struct device *dev, struct device_attribute |
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*devattr, char *buf) |
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{ |
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struct smsc47m1_data *data = dev_get_drvdata(dev); |
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|
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return sprintf(buf, "%s\n", data->name); |
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} |
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static DEVICE_ATTR_RO(name); |
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static struct attribute *smsc47m1_attributes_fan1[] = { |
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&sensor_dev_attr_fan1_input.dev_attr.attr, |
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&sensor_dev_attr_fan1_min.dev_attr.attr, |
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&sensor_dev_attr_fan1_div.dev_attr.attr, |
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&sensor_dev_attr_fan1_alarm.dev_attr.attr, |
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NULL |
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}; |
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|
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static const struct attribute_group smsc47m1_group_fan1 = { |
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.attrs = smsc47m1_attributes_fan1, |
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}; |
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|
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static struct attribute *smsc47m1_attributes_fan2[] = { |
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&sensor_dev_attr_fan2_input.dev_attr.attr, |
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&sensor_dev_attr_fan2_min.dev_attr.attr, |
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&sensor_dev_attr_fan2_div.dev_attr.attr, |
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&sensor_dev_attr_fan2_alarm.dev_attr.attr, |
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NULL |
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}; |
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|
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static const struct attribute_group smsc47m1_group_fan2 = { |
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.attrs = smsc47m1_attributes_fan2, |
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}; |
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|
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static struct attribute *smsc47m1_attributes_fan3[] = { |
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&sensor_dev_attr_fan3_input.dev_attr.attr, |
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&sensor_dev_attr_fan3_min.dev_attr.attr, |
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&sensor_dev_attr_fan3_div.dev_attr.attr, |
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&sensor_dev_attr_fan3_alarm.dev_attr.attr, |
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NULL |
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}; |
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|
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static const struct attribute_group smsc47m1_group_fan3 = { |
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.attrs = smsc47m1_attributes_fan3, |
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}; |
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|
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static struct attribute *smsc47m1_attributes_pwm1[] = { |
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&sensor_dev_attr_pwm1.dev_attr.attr, |
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&sensor_dev_attr_pwm1_enable.dev_attr.attr, |
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NULL |
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}; |
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|
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static const struct attribute_group smsc47m1_group_pwm1 = { |
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.attrs = smsc47m1_attributes_pwm1, |
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}; |
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|
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static struct attribute *smsc47m1_attributes_pwm2[] = { |
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&sensor_dev_attr_pwm2.dev_attr.attr, |
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&sensor_dev_attr_pwm2_enable.dev_attr.attr, |
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NULL |
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}; |
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|
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static const struct attribute_group smsc47m1_group_pwm2 = { |
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.attrs = smsc47m1_attributes_pwm2, |
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}; |
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|
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static struct attribute *smsc47m1_attributes_pwm3[] = { |
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&sensor_dev_attr_pwm3.dev_attr.attr, |
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&sensor_dev_attr_pwm3_enable.dev_attr.attr, |
|
NULL |
|
}; |
|
|
|
static const struct attribute_group smsc47m1_group_pwm3 = { |
|
.attrs = smsc47m1_attributes_pwm3, |
|
}; |
|
|
|
static struct attribute *smsc47m1_attributes[] = { |
|
&dev_attr_alarms.attr, |
|
&dev_attr_name.attr, |
|
NULL |
|
}; |
|
|
|
static const struct attribute_group smsc47m1_group = { |
|
.attrs = smsc47m1_attributes, |
|
}; |
|
|
|
static int __init smsc47m1_find(struct smsc47m1_sio_data *sio_data) |
|
{ |
|
u8 val; |
|
unsigned short addr; |
|
int err; |
|
|
|
err = superio_enter(); |
|
if (err) |
|
return err; |
|
|
|
val = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID); |
|
|
|
/* |
|
* SMSC LPC47M10x/LPC47M112/LPC47M13x (device id 0x59), LPC47M14x |
|
* (device id 0x5F) and LPC47B27x (device id 0x51) have fan control. |
|
* The LPC47M15x and LPC47M192 chips "with hardware monitoring block" |
|
* can do much more besides (device id 0x60). |
|
* The LPC47M997 is undocumented, but seems to be compatible with |
|
* the LPC47M192, and has the same device id. |
|
* The LPC47M292 (device id 0x6B) is somewhat compatible, but it |
|
* supports a 3rd fan, and the pin configuration registers are |
|
* unfortunately different. |
|
* The LPC47M233 has the same device id (0x6B) but is not compatible. |
|
* We check the high bit of the device revision register to |
|
* differentiate them. |
|
*/ |
|
switch (val) { |
|
case 0x51: |
|
pr_info("Found SMSC LPC47B27x\n"); |
|
sio_data->type = smsc47m1; |
|
break; |
|
case 0x59: |
|
pr_info("Found SMSC LPC47M10x/LPC47M112/LPC47M13x\n"); |
|
sio_data->type = smsc47m1; |
|
break; |
|
case 0x5F: |
|
pr_info("Found SMSC LPC47M14x\n"); |
|
sio_data->type = smsc47m1; |
|
break; |
|
case 0x60: |
|
pr_info("Found SMSC LPC47M15x/LPC47M192/LPC47M997\n"); |
|
sio_data->type = smsc47m1; |
|
break; |
|
case 0x6B: |
|
if (superio_inb(SUPERIO_REG_DEVREV) & 0x80) { |
|
pr_debug("Found SMSC LPC47M233, unsupported\n"); |
|
superio_exit(); |
|
return -ENODEV; |
|
} |
|
|
|
pr_info("Found SMSC LPC47M292\n"); |
|
sio_data->type = smsc47m2; |
|
break; |
|
default: |
|
superio_exit(); |
|
return -ENODEV; |
|
} |
|
|
|
superio_select(); |
|
addr = (superio_inb(SUPERIO_REG_BASE) << 8) |
|
| superio_inb(SUPERIO_REG_BASE + 1); |
|
if (addr == 0) { |
|
pr_info("Device address not set, will not use\n"); |
|
superio_exit(); |
|
return -ENODEV; |
|
} |
|
|
|
/* |
|
* Enable only if address is set (needed at least on the |
|
* Compaq Presario S4000NX) |
|
*/ |
|
sio_data->activate = superio_inb(SUPERIO_REG_ACT); |
|
if ((sio_data->activate & 0x01) == 0) { |
|
pr_info("Enabling device\n"); |
|
superio_outb(SUPERIO_REG_ACT, sio_data->activate | 0x01); |
|
} |
|
|
|
superio_exit(); |
|
return addr; |
|
} |
|
|
|
/* Restore device to its initial state */ |
|
static void smsc47m1_restore(const struct smsc47m1_sio_data *sio_data) |
|
{ |
|
if ((sio_data->activate & 0x01) == 0) { |
|
if (!superio_enter()) { |
|
superio_select(); |
|
pr_info("Disabling device\n"); |
|
superio_outb(SUPERIO_REG_ACT, sio_data->activate); |
|
superio_exit(); |
|
} else { |
|
pr_warn("Failed to disable device\n"); |
|
} |
|
} |
|
} |
|
|
|
#define CHECK 1 |
|
#define REQUEST 2 |
|
|
|
/* |
|
* This function can be used to: |
|
* - test for resource conflicts with ACPI |
|
* - request the resources |
|
* We only allocate the I/O ports we really need, to minimize the risk of |
|
* conflicts with ACPI or with other drivers. |
|
*/ |
|
static int __init smsc47m1_handle_resources(unsigned short address, |
|
enum chips type, int action, |
|
struct device *dev) |
|
{ |
|
static const u8 ports_m1[] = { |
|
/* register, region length */ |
|
0x04, 1, |
|
0x33, 4, |
|
0x56, 7, |
|
}; |
|
|
|
static const u8 ports_m2[] = { |
|
/* register, region length */ |
|
0x04, 1, |
|
0x09, 1, |
|
0x2c, 2, |
|
0x35, 4, |
|
0x56, 7, |
|
0x69, 4, |
|
}; |
|
|
|
int i, ports_size, err; |
|
const u8 *ports; |
|
|
|
switch (type) { |
|
case smsc47m1: |
|
default: |
|
ports = ports_m1; |
|
ports_size = ARRAY_SIZE(ports_m1); |
|
break; |
|
case smsc47m2: |
|
ports = ports_m2; |
|
ports_size = ARRAY_SIZE(ports_m2); |
|
break; |
|
} |
|
|
|
for (i = 0; i + 1 < ports_size; i += 2) { |
|
unsigned short start = address + ports[i]; |
|
unsigned short len = ports[i + 1]; |
|
|
|
switch (action) { |
|
case CHECK: |
|
/* Only check for conflicts */ |
|
err = acpi_check_region(start, len, DRVNAME); |
|
if (err) |
|
return err; |
|
break; |
|
case REQUEST: |
|
/* Request the resources */ |
|
if (!devm_request_region(dev, start, len, DRVNAME)) { |
|
dev_err(dev, |
|
"Region 0x%x-0x%x already in use!\n", |
|
start, start + len); |
|
return -EBUSY; |
|
} |
|
break; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void smsc47m1_remove_files(struct device *dev) |
|
{ |
|
sysfs_remove_group(&dev->kobj, &smsc47m1_group); |
|
sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan1); |
|
sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan2); |
|
sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan3); |
|
sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm1); |
|
sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm2); |
|
sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm3); |
|
} |
|
|
|
static int __init smsc47m1_probe(struct platform_device *pdev) |
|
{ |
|
struct device *dev = &pdev->dev; |
|
struct smsc47m1_sio_data *sio_data = dev_get_platdata(dev); |
|
struct smsc47m1_data *data; |
|
struct resource *res; |
|
int err; |
|
int fan1, fan2, fan3, pwm1, pwm2, pwm3; |
|
|
|
static const char * const names[] = { |
|
"smsc47m1", |
|
"smsc47m2", |
|
}; |
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
|
err = smsc47m1_handle_resources(res->start, sio_data->type, |
|
REQUEST, dev); |
|
if (err < 0) |
|
return err; |
|
|
|
data = devm_kzalloc(dev, sizeof(struct smsc47m1_data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
data->addr = res->start; |
|
data->type = sio_data->type; |
|
data->name = names[sio_data->type]; |
|
mutex_init(&data->update_lock); |
|
platform_set_drvdata(pdev, data); |
|
|
|
/* |
|
* If no function is properly configured, there's no point in |
|
* actually registering the chip. |
|
*/ |
|
pwm1 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(0)) & 0x05) |
|
== 0x04; |
|
pwm2 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(1)) & 0x05) |
|
== 0x04; |
|
if (data->type == smsc47m2) { |
|
fan1 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN1) |
|
& 0x0d) == 0x09; |
|
fan2 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN2) |
|
& 0x0d) == 0x09; |
|
fan3 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN3) |
|
& 0x0d) == 0x0d; |
|
pwm3 = (smsc47m1_read_value(data, SMSC47M2_REG_PPIN3) |
|
& 0x0d) == 0x08; |
|
} else { |
|
fan1 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(0)) |
|
& 0x05) == 0x05; |
|
fan2 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(1)) |
|
& 0x05) == 0x05; |
|
fan3 = 0; |
|
pwm3 = 0; |
|
} |
|
if (!(fan1 || fan2 || fan3 || pwm1 || pwm2 || pwm3)) { |
|
dev_warn(dev, "Device not configured, will not use\n"); |
|
return -ENODEV; |
|
} |
|
|
|
/* |
|
* Some values (fan min, clock dividers, pwm registers) may be |
|
* needed before any update is triggered, so we better read them |
|
* at least once here. We don't usually do it that way, but in |
|
* this particular case, manually reading 5 registers out of 8 |
|
* doesn't make much sense and we're better using the existing |
|
* function. |
|
*/ |
|
smsc47m1_update_device(dev, 1); |
|
|
|
/* Register sysfs hooks */ |
|
if (fan1) { |
|
err = sysfs_create_group(&dev->kobj, |
|
&smsc47m1_group_fan1); |
|
if (err) |
|
goto error_remove_files; |
|
} else |
|
dev_dbg(dev, "Fan 1 not enabled by hardware, skipping\n"); |
|
|
|
if (fan2) { |
|
err = sysfs_create_group(&dev->kobj, |
|
&smsc47m1_group_fan2); |
|
if (err) |
|
goto error_remove_files; |
|
} else |
|
dev_dbg(dev, "Fan 2 not enabled by hardware, skipping\n"); |
|
|
|
if (fan3) { |
|
err = sysfs_create_group(&dev->kobj, |
|
&smsc47m1_group_fan3); |
|
if (err) |
|
goto error_remove_files; |
|
} else if (data->type == smsc47m2) |
|
dev_dbg(dev, "Fan 3 not enabled by hardware, skipping\n"); |
|
|
|
if (pwm1) { |
|
err = sysfs_create_group(&dev->kobj, |
|
&smsc47m1_group_pwm1); |
|
if (err) |
|
goto error_remove_files; |
|
} else |
|
dev_dbg(dev, "PWM 1 not enabled by hardware, skipping\n"); |
|
|
|
if (pwm2) { |
|
err = sysfs_create_group(&dev->kobj, |
|
&smsc47m1_group_pwm2); |
|
if (err) |
|
goto error_remove_files; |
|
} else |
|
dev_dbg(dev, "PWM 2 not enabled by hardware, skipping\n"); |
|
|
|
if (pwm3) { |
|
err = sysfs_create_group(&dev->kobj, |
|
&smsc47m1_group_pwm3); |
|
if (err) |
|
goto error_remove_files; |
|
} else if (data->type == smsc47m2) |
|
dev_dbg(dev, "PWM 3 not enabled by hardware, skipping\n"); |
|
|
|
err = sysfs_create_group(&dev->kobj, &smsc47m1_group); |
|
if (err) |
|
goto error_remove_files; |
|
|
|
data->hwmon_dev = hwmon_device_register(dev); |
|
if (IS_ERR(data->hwmon_dev)) { |
|
err = PTR_ERR(data->hwmon_dev); |
|
goto error_remove_files; |
|
} |
|
|
|
return 0; |
|
|
|
error_remove_files: |
|
smsc47m1_remove_files(dev); |
|
return err; |
|
} |
|
|
|
static int __exit smsc47m1_remove(struct platform_device *pdev) |
|
{ |
|
struct smsc47m1_data *data = platform_get_drvdata(pdev); |
|
|
|
hwmon_device_unregister(data->hwmon_dev); |
|
smsc47m1_remove_files(&pdev->dev); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver smsc47m1_driver = { |
|
.driver = { |
|
.name = DRVNAME, |
|
}, |
|
.remove = __exit_p(smsc47m1_remove), |
|
}; |
|
|
|
static int __init smsc47m1_device_add(unsigned short address, |
|
const struct smsc47m1_sio_data *sio_data) |
|
{ |
|
struct resource res = { |
|
.start = address, |
|
.end = address + SMSC_EXTENT - 1, |
|
.name = DRVNAME, |
|
.flags = IORESOURCE_IO, |
|
}; |
|
int err; |
|
|
|
err = smsc47m1_handle_resources(address, sio_data->type, CHECK, NULL); |
|
if (err) |
|
goto exit; |
|
|
|
pdev = platform_device_alloc(DRVNAME, address); |
|
if (!pdev) { |
|
err = -ENOMEM; |
|
pr_err("Device allocation failed\n"); |
|
goto exit; |
|
} |
|
|
|
err = platform_device_add_resources(pdev, &res, 1); |
|
if (err) { |
|
pr_err("Device resource addition failed (%d)\n", err); |
|
goto exit_device_put; |
|
} |
|
|
|
err = platform_device_add_data(pdev, sio_data, |
|
sizeof(struct smsc47m1_sio_data)); |
|
if (err) { |
|
pr_err("Platform data allocation failed\n"); |
|
goto exit_device_put; |
|
} |
|
|
|
err = platform_device_add(pdev); |
|
if (err) { |
|
pr_err("Device addition failed (%d)\n", err); |
|
goto exit_device_put; |
|
} |
|
|
|
return 0; |
|
|
|
exit_device_put: |
|
platform_device_put(pdev); |
|
exit: |
|
return err; |
|
} |
|
|
|
static int __init sm_smsc47m1_init(void) |
|
{ |
|
int err; |
|
unsigned short address; |
|
struct smsc47m1_sio_data sio_data; |
|
|
|
err = smsc47m1_find(&sio_data); |
|
if (err < 0) |
|
return err; |
|
address = err; |
|
|
|
/* Sets global pdev as a side effect */ |
|
err = smsc47m1_device_add(address, &sio_data); |
|
if (err) |
|
return err; |
|
|
|
err = platform_driver_probe(&smsc47m1_driver, smsc47m1_probe); |
|
if (err) |
|
goto exit_device; |
|
|
|
return 0; |
|
|
|
exit_device: |
|
platform_device_unregister(pdev); |
|
smsc47m1_restore(&sio_data); |
|
return err; |
|
} |
|
|
|
static void __exit sm_smsc47m1_exit(void) |
|
{ |
|
platform_driver_unregister(&smsc47m1_driver); |
|
smsc47m1_restore(dev_get_platdata(&pdev->dev)); |
|
platform_device_unregister(pdev); |
|
} |
|
|
|
MODULE_AUTHOR("Mark D. Studebaker <[email protected]>"); |
|
MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver"); |
|
MODULE_LICENSE("GPL"); |
|
|
|
module_init(sm_smsc47m1_init); |
|
module_exit(sm_smsc47m1_exit);
|
|
|