diff options
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/w83627hf.c | 141 |
1 files changed, 140 insertions, 1 deletions
diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c index 72aee3c0e8de..cd953604c38f 100644 --- a/drivers/hwmon/w83627hf.c +++ b/drivers/hwmon/w83627hf.c @@ -220,6 +220,18 @@ static const u8 regpwm[] = { W83627THF_REG_PWM1, W83627THF_REG_PWM2, #define W836X7HF_REG_PWM(type, nr) (((type) == w83627hf) ? \ regpwm_627hf[(nr) - 1] : regpwm[(nr) - 1]) +#define W83627HF_REG_PWM_FREQ 0x5C /* Only for the 627HF */ + +#define W83637HF_REG_PWM_FREQ1 0x00 /* 697HF/687THF too */ +#define W83637HF_REG_PWM_FREQ2 0x02 /* 697HF/687THF too */ +#define W83637HF_REG_PWM_FREQ3 0x10 /* 687THF too */ + +static const u8 W83637HF_REG_PWM_FREQ[] = { W83637HF_REG_PWM_FREQ1, + W83637HF_REG_PWM_FREQ2, + W83637HF_REG_PWM_FREQ3 }; + +#define W83627HF_BASE_PWM_FREQ 46870 + #define W83781D_REG_I2C_ADDR 0x48 #define W83781D_REG_I2C_SUBADDR 0x4A @@ -267,6 +279,49 @@ static int TEMP_FROM_REG(u8 reg) #define PWM_TO_REG(val) (SENSORS_LIMIT((val),0,255)) +static inline unsigned long pwm_freq_from_reg_627hf(u8 reg) +{ + unsigned long freq; + freq = W83627HF_BASE_PWM_FREQ >> reg; + return freq; +} +static inline u8 pwm_freq_to_reg_627hf(unsigned long val) +{ + u8 i; + /* Only 5 dividers (1 2 4 8 16) + Search for the nearest available frequency */ + for (i = 0; i < 4; i++) { + if (val > (((W83627HF_BASE_PWM_FREQ >> i) + + (W83627HF_BASE_PWM_FREQ >> (i+1))) / 2)) + break; + } + return i; +} + +static inline unsigned long pwm_freq_from_reg(u8 reg) +{ + /* Clock bit 8 -> 180 kHz or 24 MHz */ + unsigned long clock = (reg & 0x80) ? 180000UL : 24000000UL; + + reg &= 0x7f; + /* This should not happen but anyway... */ + if (reg == 0) + reg++; + return (clock / (reg << 8)); +} +static inline u8 pwm_freq_to_reg(unsigned long val) +{ + /* Minimum divider value is 0x01 and maximum is 0x7F */ + if (val >= 93750) /* The highest we can do */ + return 0x01; + if (val >= 720) /* Use 24 MHz clock */ + return (24000000UL / (val << 8)); + if (val < 6) /* The lowest we can do */ + return 0xFF; + else /* Use 180 kHz clock */ + return (0x80 | (180000UL / (val << 8))); +} + #define BEEP_MASK_FROM_REG(val) (val) #define BEEP_MASK_TO_REG(val) ((val) & 0xffffff) #define BEEP_ENABLE_TO_REG(val) ((val)?1:0) @@ -316,6 +371,7 @@ struct w83627hf_data { u32 beep_mask; /* Register encoding, combined */ u8 beep_enable; /* Boolean */ u8 pwm[3]; /* Register value */ + u8 pwm_freq[3]; /* Register value */ u16 sens[3]; /* 782D/783S only. 1 = pentium diode; 2 = 3904 diode; 3000-5000 = thermistor beta. @@ -852,6 +908,64 @@ sysfs_pwm(2); sysfs_pwm(3); static ssize_t +show_pwm_freq_reg(struct device *dev, char *buf, int nr) +{ + struct w83627hf_data *data = w83627hf_update_device(dev); + if (data->type == w83627hf) + return sprintf(buf, "%ld\n", + pwm_freq_from_reg_627hf(data->pwm_freq[nr - 1])); + else + return sprintf(buf, "%ld\n", + pwm_freq_from_reg(data->pwm_freq[nr - 1])); +} + +static ssize_t +store_pwm_freq_reg(struct device *dev, const char *buf, size_t count, int nr) +{ + struct w83627hf_data *data = dev_get_drvdata(dev); + static const u8 mask[]={0xF8, 0x8F}; + u32 val; + + val = simple_strtoul(buf, NULL, 10); + + mutex_lock(&data->update_lock); + + if (data->type == w83627hf) { + data->pwm_freq[nr - 1] = pwm_freq_to_reg_627hf(val); + w83627hf_write_value(data, W83627HF_REG_PWM_FREQ, + (data->pwm_freq[nr - 1] << ((nr - 1)*4)) | + (w83627hf_read_value(data, + W83627HF_REG_PWM_FREQ) & mask[nr - 1])); + } else { + data->pwm_freq[nr - 1] = pwm_freq_to_reg(val); + w83627hf_write_value(data, W83637HF_REG_PWM_FREQ[nr - 1], + data->pwm_freq[nr - 1]); + } + + mutex_unlock(&data->update_lock); + return count; +} + +#define sysfs_pwm_freq(offset) \ +static ssize_t show_regs_pwm_freq_##offset(struct device *dev, \ + struct device_attribute *attr, char *buf) \ +{ \ + return show_pwm_freq_reg(dev, buf, offset); \ +} \ +static ssize_t \ +store_regs_pwm_freq_##offset(struct device *dev, \ + struct device_attribute *attr, const char *buf, size_t count) \ +{ \ + return store_pwm_freq_reg(dev, buf, count, offset); \ +} \ +static DEVICE_ATTR(pwm##offset##_freq, S_IRUGO | S_IWUSR, \ + show_regs_pwm_freq_##offset, store_regs_pwm_freq_##offset); + +sysfs_pwm_freq(1); +sysfs_pwm_freq(2); +sysfs_pwm_freq(3); + +static ssize_t show_sensor_reg(struct device *dev, char *buf, int nr) { struct w83627hf_data *data = w83627hf_update_device(dev); @@ -1077,6 +1191,9 @@ static struct attribute *w83627hf_attributes_opt[] = { &dev_attr_pwm3.attr, + &dev_attr_pwm1_freq.attr, + &dev_attr_pwm2_freq.attr, + &dev_attr_pwm3_freq.attr, NULL }; @@ -1139,7 +1256,9 @@ static int __devinit w83627hf_probe(struct platform_device *pdev) || (err = device_create_file(dev, &dev_attr_in5_max)) || (err = device_create_file(dev, &dev_attr_in6_input)) || (err = device_create_file(dev, &dev_attr_in6_min)) - || (err = device_create_file(dev, &dev_attr_in6_max))) + || (err = device_create_file(dev, &dev_attr_in6_max)) + || (err = device_create_file(dev, &dev_attr_pwm1_freq)) + || (err = device_create_file(dev, &dev_attr_pwm2_freq))) goto ERROR4; if (data->type != w83697hf) @@ -1169,6 +1288,12 @@ static int __devinit w83627hf_probe(struct platform_device *pdev) if ((err = device_create_file(dev, &dev_attr_pwm3))) goto ERROR4; + if (data->type == w83637hf || data->type == w83687thf) + if ((err = device_create_file(dev, &dev_attr_pwm1_freq)) + || (err = device_create_file(dev, &dev_attr_pwm2_freq)) + || (err = device_create_file(dev, &dev_attr_pwm3_freq))) + goto ERROR4; + data->class_dev = hwmon_device_register(dev); if (IS_ERR(data->class_dev)) { err = PTR_ERR(data->class_dev); @@ -1472,6 +1597,20 @@ static struct w83627hf_data *w83627hf_update_device(struct device *dev) (data->type == w83627hf || data->type == w83697hf)) break; } + if (data->type == w83627hf) { + u8 tmp = w83627hf_read_value(data, + W83627HF_REG_PWM_FREQ); + data->pwm_freq[0] = tmp & 0x07; + data->pwm_freq[1] = (tmp >> 4) & 0x07; + } else if (data->type != w83627thf) { + for (i = 1; i <= 3; i++) { + data->pwm_freq[i - 1] = + w83627hf_read_value(data, + W83637HF_REG_PWM_FREQ[i - 1]); + if (i == 2 && (data->type == w83697hf)) + break; + } + } data->temp = w83627hf_read_value(data, W83781D_REG_TEMP(1)); data->temp_max = |