diff mbox series

hwmon: (nct7904) Add extra sysfs support for fan, voltage and temperature.

Message ID 20190531102628.28785-1-Amy.Shih@advantech.com.tw (mailing list archive)
State Accepted
Headers show
Series hwmon: (nct7904) Add extra sysfs support for fan, voltage and temperature. | expand

Commit Message

Amy.Shih@advantech.com.tw May 31, 2019, 10:26 a.m. UTC
From: "amy.shih" <amy.shih@advantech.com.tw>

This patch do 2 jobs as described in below:

1. NCT-7904D also supports reading of channel limitation registers
and SMI status registers for fan, voltage and temperature monitoring,
add below sysfs nodes:

-fan[1-*]_min
-fan[1-*]_alarm
-in[0-*]_min
-in[0-*]_max
-in[0-*]_alarm
-temp[1-*]_max
-temp[1-*]_max_hyst
-temp[1-*]_emergency
-temp[1-*]_emergency_hyst
-temp[1-*]_alarm

2. Add the temp[1-*]_type sysfs to show type of temperature sensor is
thermal diode, thermistor, AMD SB-TSI or Intel PECI.

Signed-off-by: amy.shih <amy.shih@advantech.com.tw>
---
 drivers/hwmon/nct7904.c | 492 +++++++++++++++++++++++++++++++++++-----
 1 file changed, 440 insertions(+), 52 deletions(-)

Comments

Guenter Roeck June 6, 2019, 3:58 a.m. UTC | #1
On Fri, May 31, 2019 at 10:26:28AM +0000, Amy.Shih@advantech.com.tw wrote:
> From: "amy.shih" <amy.shih@advantech.com.tw>
> 
> This patch do 2 jobs as described in below:
> 
> 1. NCT-7904D also supports reading of channel limitation registers
> and SMI status registers for fan, voltage and temperature monitoring,
> add below sysfs nodes:
> 
> -fan[1-*]_min
> -fan[1-*]_alarm
> -in[0-*]_min
> -in[0-*]_max
> -in[0-*]_alarm
> -temp[1-*]_max
> -temp[1-*]_max_hyst
> -temp[1-*]_emergency
> -temp[1-*]_emergency_hyst
> -temp[1-*]_alarm
> 
> 2. Add the temp[1-*]_type sysfs to show type of temperature sensor is
> thermal diode, thermistor, AMD SB-TSI or Intel PECI.
> 

I have dropped this patch from the tree. Please fix all reported problems.

- bad fallthrough in various switchg statements
- tmp is declared as u8 in nct7904_write_in and then checked with "if (tmp <
  0)"

Please compile with W=1 to ensure that there are no further problems.

Guenter

> Signed-off-by: amy.shih <amy.shih@advantech.com.tw>
> ---
>  drivers/hwmon/nct7904.c | 492 +++++++++++++++++++++++++++++++++++-----
>  1 file changed, 440 insertions(+), 52 deletions(-)
> 
> diff --git a/drivers/hwmon/nct7904.c b/drivers/hwmon/nct7904.c
> index 6a74df6841f0..91d1eb822707 100644
> --- a/drivers/hwmon/nct7904.c
> +++ b/drivers/hwmon/nct7904.c
> @@ -55,10 +55,33 @@
>  #define DTS_T_CTRL1_REG		0x27
>  #define VT_ADC_MD_REG		0x2E
>  
> +#define VSEN1_HV_LL_REG		0x02	/* Bank 1; 2 regs (HV/LV) per sensor */
> +#define VSEN1_LV_LL_REG		0x03	/* Bank 1; 2 regs (HV/LV) per sensor */
> +#define VSEN1_HV_HL_REG		0x00	/* Bank 1; 2 regs (HV/LV) per sensor */
> +#define VSEN1_LV_HL_REG		0x01	/* Bank 1; 2 regs (HV/LV) per sensor */
> +#define SMI_STS1_REG		0xC1	/* Bank 0; SMI Status Register */
> +#define SMI_STS5_REG		0xC5	/* Bank 0; SMI Status Register */
> +#define SMI_STS7_REG		0xC7	/* Bank 0; SMI Status Register */
> +#define SMI_STS8_REG		0xC8	/* Bank 0; SMI Status Register */
> +
>  #define VSEN1_HV_REG		0x40	/* Bank 0; 2 regs (HV/LV) per sensor */
>  #define TEMP_CH1_HV_REG		0x42	/* Bank 0; same as VSEN2_HV */
>  #define LTD_HV_REG		0x62	/* Bank 0; 2 regs in VSEN range */
> +#define LTD_HV_HL_REG		0x44	/* Bank 1; 1 reg for LTD */
> +#define LTD_LV_HL_REG		0x45	/* Bank 1; 1 reg for LTD */
> +#define LTD_HV_LL_REG		0x46	/* Bank 1; 1 reg for LTD */
> +#define LTD_LV_LL_REG		0x47	/* Bank 1; 1 reg for LTD */
> +#define TEMP_CH1_CH_REG		0x05	/* Bank 1; 1 reg for LTD */
> +#define TEMP_CH1_W_REG		0x06	/* Bank 1; 1 reg for LTD */
> +#define TEMP_CH1_WH_REG		0x07	/* Bank 1; 1 reg for LTD */
> +#define TEMP_CH1_C_REG		0x04	/* Bank 1; 1 reg per sensor */
> +#define DTS_T_CPU1_C_REG	0x90	/* Bank 1; 1 reg per sensor */
> +#define DTS_T_CPU1_CH_REG	0x91	/* Bank 1; 1 reg per sensor */
> +#define DTS_T_CPU1_W_REG	0x92	/* Bank 1; 1 reg per sensor */
> +#define DTS_T_CPU1_WH_REG	0x93	/* Bank 1; 1 reg per sensor */
>  #define FANIN1_HV_REG		0x80	/* Bank 0; 2 regs (HV/LV) per sensor */
> +#define FANIN1_HV_HL_REG	0x60	/* Bank 1; 2 regs (HV/LV) per sensor */
> +#define FANIN1_LV_HL_REG	0x61	/* Bank 1; 2 regs (HV/LV) per sensor */
>  #define T_CPU1_HV_REG		0xA0	/* Bank 0; 2 regs (HV/LV) per sensor */
>  
>  #define PRTS_REG		0x03	/* Bank 2 */
> @@ -67,6 +90,8 @@
>  #define FANCTL1_FMR_REG		0x00	/* Bank 3; 1 reg per channel */
>  #define FANCTL1_OUT_REG		0x10	/* Bank 3; 1 reg per channel */
>  
> +#define ENABLE_TSI	BIT(1)
> +
>  static const unsigned short normal_i2c[] = {
>  	0x2d, 0x2e, I2C_CLIENT_END
>  };
> @@ -81,6 +106,7 @@ struct nct7904_data {
>  	u8 fan_mode[FANCTL_MAX];
>  	u8 enable_dts;
>  	u8 has_dts;
> +	u8 temp_mode; /* 0: TR mode, 1: TD mode */
>  };
>  
>  /* Access functions */
> @@ -179,6 +205,25 @@ static int nct7904_read_fan(struct device *dev, u32 attr, int channel,
>  			rpm = 1350000 / cnt;
>  		*val = rpm;
>  		return 0;
> +	case hwmon_fan_min:
> +		ret = nct7904_read_reg16(data, BANK_1,
> +					 FANIN1_HV_HL_REG + channel * 2);
> +		if (ret < 0)
> +			return ret;
> +		cnt = ((ret & 0xff00) >> 3) | (ret & 0x1f);
> +		if (cnt == 0x1fff)
> +			rpm = 0;
> +		else
> +			rpm = 1350000 / cnt;
> +		*val = rpm;
> +		return 0;
> +	case hwmon_fan_alarm:
> +		ret = nct7904_read_reg(data, BANK_0,
> +				       SMI_STS7_REG + (channel >> 3));
> +		if (ret < 0)
> +			return ret;
> +		*val = (ret >> (channel & 0x07)) & 1;
> +		return 0;
>  	default:
>  		return -EOPNOTSUPP;
>  	}
> @@ -188,8 +233,18 @@ static umode_t nct7904_fan_is_visible(const void *_data, u32 attr, int channel)
>  {
>  	const struct nct7904_data *data = _data;
>  
> -	if (attr == hwmon_fan_input && data->fanin_mask & (1 << channel))
> -		return 0444;
> +	switch (attr) {
> +	case hwmon_fan_input:
> +	case hwmon_fan_alarm:
> +		if (data->fanin_mask & (1 << channel))
> +			return 0444;
> +	case hwmon_fan_min:
> +		if (data->fanin_mask & (1 << channel))
> +			return 0644;
> +	default:
> +		break;
> +	}
> +
>  	return 0;
>  }
>  
> @@ -220,6 +275,37 @@ static int nct7904_read_in(struct device *dev, u32 attr, int channel,
>  			volt *= 6; /* 0.006V scale */
>  		*val = volt;
>  		return 0;
> +	case hwmon_in_min:
> +		ret = nct7904_read_reg16(data, BANK_1,
> +					 VSEN1_HV_LL_REG + index * 4);
> +		if (ret < 0)
> +			return ret;
> +		volt = ((ret & 0xff00) >> 5) | (ret & 0x7);
> +		if (index < 14)
> +			volt *= 2; /* 0.002V scale */
> +		else
> +			volt *= 6; /* 0.006V scale */
> +		*val = volt;
> +		return 0;
> +	case hwmon_in_max:
> +		ret = nct7904_read_reg16(data, BANK_1,
> +					 VSEN1_HV_HL_REG + index * 4);
> +		if (ret < 0)
> +			return ret;
> +		volt = ((ret & 0xff00) >> 5) | (ret & 0x7);
> +		if (index < 14)
> +			volt *= 2; /* 0.002V scale */
> +		else
> +			volt *= 6; /* 0.006V scale */
> +		*val = volt;
> +		return 0;
> +	case hwmon_in_alarm:
> +		ret = nct7904_read_reg(data, BANK_0,
> +				       SMI_STS1_REG + (index >> 3));
> +		if (ret < 0)
> +			return ret;
> +		*val = (ret >> (index & 0x07)) & 1;
> +		return 0;
>  	default:
>  		return -EOPNOTSUPP;
>  	}
> @@ -230,9 +316,18 @@ static umode_t nct7904_in_is_visible(const void *_data, u32 attr, int channel)
>  	const struct nct7904_data *data = _data;
>  	int index = nct7904_chan_to_index[channel];
>  
> -	if (channel > 0 && attr == hwmon_in_input &&
> -	    (data->vsen_mask & BIT(index)))
> -		return 0444;
> +	switch (attr) {
> +	case hwmon_in_input:
> +	case hwmon_in_alarm:
> +		if (channel > 0 && (data->vsen_mask & BIT(index)))
> +			return 0444;
> +	case hwmon_in_min:
> +	case hwmon_in_max:
> +		if (channel > 0 && (data->vsen_mask & BIT(index)))
> +			return 0644;
> +	default:
> +		break;
> +	}
>  
>  	return 0;
>  }
> @@ -242,6 +337,7 @@ static int nct7904_read_temp(struct device *dev, u32 attr, int channel,
>  {
>  	struct nct7904_data *data = dev_get_drvdata(dev);
>  	int ret, temp;
> +	unsigned int reg1, reg2, reg3;
>  
>  	switch (attr) {
>  	case hwmon_temp_input:
> @@ -259,16 +355,100 @@ static int nct7904_read_temp(struct device *dev, u32 attr, int channel,
>  		temp = ((ret & 0xff00) >> 5) | (ret & 0x7);
>  		*val = sign_extend32(temp, 10) * 125;
>  		return 0;
> +	case hwmon_temp_alarm:
> +		if (channel < 5) {
> +			ret = nct7904_read_reg(data, BANK_0,
> +					       SMI_STS1_REG);
> +			if (ret < 0)
> +				return ret;
> +			*val = (ret >> (channel & 0x07)) & 1;
> +		} else {
> +			if ((channel - 5) < 4) {
> +				ret = nct7904_read_reg(data, BANK_0,
> +						       SMI_STS7_REG +
> +						       ((channel - 5) >> 3));
> +				if (ret < 0)
> +					return ret;
> +				*val = (ret >> ((channel - 5) & 0x07)) & 1;
> +			} else {
> +				ret = nct7904_read_reg(data, BANK_0,
> +						       SMI_STS8_REG +
> +						       ((channel - 5) >> 3));
> +				if (ret < 0)
> +					return ret;
> +				*val = (ret >> (((channel - 5) & 0x07) - 4))
> +							& 1;
> +			}
> +		}
> +		return 0;
> +	case hwmon_temp_type:
> +		if (channel < 5) {
> +			if ((data->tcpu_mask >> channel) & 0x01) {
> +				if ((data->temp_mode >> channel) & 0x01)
> +					*val = 3; /* TD */
> +				else
> +					*val = 4; /* TR */
> +			} else {
> +				*val = 0;
> +			}
> +		} else {
> +			if ((data->has_dts >> (channel - 5)) & 0x01) {
> +				if (data->enable_dts & ENABLE_TSI)
> +					*val = 5; /* TSI */
> +				else
> +					*val = 6; /* PECI */
> +			} else {
> +				*val = 0;
> +			}
> +		}
> +		return 0;
> +	case hwmon_temp_max:
> +		reg1 = LTD_HV_HL_REG;
> +		reg2 = TEMP_CH1_C_REG;
> +		reg3 = DTS_T_CPU1_C_REG;
> +		break;
> +	case hwmon_temp_max_hyst:
> +		reg1 = LTD_LV_HL_REG;
> +		reg2 = TEMP_CH1_CH_REG;
> +		reg3 = DTS_T_CPU1_CH_REG;
> +		break;
> +	case hwmon_temp_emergency:
> +		reg1 = LTD_HV_LL_REG;
> +		reg2 = TEMP_CH1_W_REG;
> +		reg3 = DTS_T_CPU1_W_REG;
> +		break;
> +	case hwmon_temp_emergency_hyst:
> +		reg1 = LTD_LV_LL_REG;
> +		reg2 = TEMP_CH1_WH_REG;
> +		reg3 = DTS_T_CPU1_WH_REG;
> +		break;
>  	default:
>  		return -EOPNOTSUPP;
>  	}
> +
> +	if (channel == 4)
> +		ret = nct7904_read_reg(data, BANK_1, reg1);
> +	else if (channel < 5)
> +		ret = nct7904_read_reg(data, BANK_1,
> +				       reg2 + channel * 8);
> +	else
> +		ret = nct7904_read_reg(data, BANK_1,
> +				       reg3 + (channel - 5) * 4);
> +
> +	if (ret < 0)
> +		return ret;
> +	*val = ret * 1000;
> +	return 0;
>  }
>  
>  static umode_t nct7904_temp_is_visible(const void *_data, u32 attr, int channel)
>  {
>  	const struct nct7904_data *data = _data;
>  
> -	if (attr == hwmon_temp_input) {
> +	switch (attr) {
> +	case hwmon_temp_input:
> +	case hwmon_temp_alarm:
> +	case hwmon_temp_type:
>  		if (channel < 5) {
>  			if (data->tcpu_mask & BIT(channel))
>  				return 0444;
> @@ -276,6 +456,19 @@ static umode_t nct7904_temp_is_visible(const void *_data, u32 attr, int channel)
>  			if (data->has_dts & BIT(channel - 5))
>  				return 0444;
>  		}
> +	case hwmon_temp_max:
> +	case hwmon_temp_max_hyst:
> +	case hwmon_temp_emergency:
> +	case hwmon_temp_emergency_hyst:
> +		if (channel < 5) {
> +			if (data->tcpu_mask & BIT(channel))
> +				return 0644;
> +		} else {
> +			if (data->has_dts & BIT(channel - 5))
> +				return 0644;
> +		}
> +	default:
> +		break;
>  	}
>  
>  	return 0;
> @@ -306,6 +499,139 @@ static int nct7904_read_pwm(struct device *dev, u32 attr, int channel,
>  	}
>  }
>  
> +static int nct7904_write_temp(struct device *dev, u32 attr, int channel,
> +			      long val)
> +{
> +	struct nct7904_data *data = dev_get_drvdata(dev);
> +	int ret, index;
> +	unsigned int reg1, reg2, reg3;
> +
> +	index = nct7904_chan_to_index[channel];
> +	val = clamp_val(val / 1000, -128, 127);
> +
> +	switch (attr) {
> +	case hwmon_temp_max:
> +		reg1 = LTD_HV_HL_REG;
> +		reg2 = TEMP_CH1_C_REG;
> +		reg3 = DTS_T_CPU1_C_REG;
> +		break;
> +	case hwmon_temp_max_hyst:
> +		reg1 = LTD_LV_HL_REG;
> +		reg2 = TEMP_CH1_CH_REG;
> +		reg3 = DTS_T_CPU1_CH_REG;
> +		break;
> +	case hwmon_temp_emergency:
> +		reg1 = LTD_HV_LL_REG;
> +		reg2 = TEMP_CH1_W_REG;
> +		reg3 = DTS_T_CPU1_W_REG;
> +		break;
> +	case hwmon_temp_emergency_hyst:
> +		reg1 = LTD_LV_LL_REG;
> +		reg2 = TEMP_CH1_WH_REG;
> +		reg3 = DTS_T_CPU1_WH_REG;
> +		break;
> +	default:
> +		return -EOPNOTSUPP;
> +	}
> +	if (channel == 4)
> +		ret = nct7904_write_reg(data, BANK_1, reg1, val);
> +	else if (channel < 5)
> +		ret = nct7904_write_reg(data, BANK_1,
> +					reg2 + channel * 8, val);
> +	else
> +		ret = nct7904_write_reg(data, BANK_1,
> +					reg3 + (channel - 5) * 4, val);
> +
> +	return ret;
> +}
> +
> +static int nct7904_write_fan(struct device *dev, u32 attr, int channel,
> +			     long val)
> +{
> +	struct nct7904_data *data = dev_get_drvdata(dev);
> +	int ret;
> +	u8 tmp;
> +
> +	switch (attr) {
> +	case hwmon_fan_min:
> +		if (val <= 0)
> +			return 0x1fff;
> +
> +		val = clamp_val((1350000 + (val >> 1)) / val, 1, 0x1fff);
> +		tmp = (val >> 5) & 0xff;
> +		ret = nct7904_write_reg(data, BANK_1,
> +					FANIN1_HV_HL_REG + channel * 2, tmp);
> +		if (ret < 0)
> +			return ret;
> +		tmp = val & 0x1f;
> +		ret = nct7904_write_reg(data, BANK_1,
> +					FANIN1_LV_HL_REG + channel * 2, tmp);
> +		return ret;
> +	default:
> +		return -EOPNOTSUPP;
> +	}
> +}
> +
> +static int nct7904_write_in(struct device *dev, u32 attr, int channel,
> +			    long val)
> +{
> +	struct nct7904_data *data = dev_get_drvdata(dev);
> +	int ret, index;
> +	u8 tmp;
> +
> +	index = nct7904_chan_to_index[channel];
> +
> +	if (index < 14)
> +		val = val / 2; /* 0.002V scale */
> +	else
> +		val = val / 6; /* 0.006V scale */
> +
> +	val = clamp_val(val, 0, 0x7ff); /* Bit 15 is sign bit */
> +
> +	switch (attr) {
> +	case hwmon_in_min:
> +		tmp = nct7904_read_reg(data, BANK_1,
> +				       VSEN1_LV_LL_REG + index * 4);
> +		if (tmp < 0)
> +			return tmp;
> +		tmp &= ~0x7;
> +		tmp |= val & 0x7;
> +		ret = nct7904_write_reg(data, BANK_1,
> +					VSEN1_LV_LL_REG + index * 4, tmp);
> +		if (ret < 0)
> +			return ret;
> +		tmp = nct7904_read_reg(data, BANK_1,
> +				       VSEN1_HV_LL_REG + index * 4);
> +		if (tmp < 0)
> +			return tmp;
> +		tmp = (val >> 3) & 0xff;
> +		ret = nct7904_write_reg(data, BANK_1,
> +					VSEN1_HV_LL_REG + index * 4, tmp);
> +		return ret;
> +	case hwmon_in_max:
> +		tmp = nct7904_read_reg(data, BANK_1,
> +				       VSEN1_LV_HL_REG + index * 4);
> +		if (tmp < 0)
> +			return tmp;
> +		tmp &= ~0x7;
> +		tmp |= val & 0x7;
> +		ret = nct7904_write_reg(data, BANK_1,
> +					VSEN1_LV_HL_REG + index * 4, tmp);
> +		if (ret < 0)
> +			return ret;
> +		tmp = nct7904_read_reg(data, BANK_1,
> +				       VSEN1_HV_LL_REG + index * 4);
> +		if (tmp < 0)
> +			return tmp;
> +		tmp = (val >> 3) & 0xff;
> +		ret = nct7904_write_reg(data, BANK_1,
> +					VSEN1_HV_LL_REG + index * 4, tmp);
> +		return ret;
> +	default:
> +		return -EOPNOTSUPP;
> +	}
> +}
> +
>  static int nct7904_write_pwm(struct device *dev, u32 attr, int channel,
>  			     long val)
>  {
> @@ -363,8 +689,14 @@ static int nct7904_write(struct device *dev, enum hwmon_sensor_types type,
>  			 u32 attr, int channel, long val)
>  {
>  	switch (type) {
> +	case hwmon_in:
> +		return nct7904_write_in(dev, attr, channel, val);
> +	case hwmon_fan:
> +		return nct7904_write_fan(dev, attr, channel, val);
>  	case hwmon_pwm:
>  		return nct7904_write_pwm(dev, attr, channel, val);
> +	case hwmon_temp:
> +		return nct7904_write_temp(dev, attr, channel, val);
>  	default:
>  		return -EOPNOTSUPP;
>  	}
> @@ -413,51 +745,91 @@ static int nct7904_detect(struct i2c_client *client,
>  
>  static const struct hwmon_channel_info *nct7904_info[] = {
>  	HWMON_CHANNEL_INFO(in,
> -			   HWMON_I_INPUT, /* dummy, skipped in is_visible */
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT,
> -			   HWMON_I_INPUT),
> +			   /* dummy, skipped in is_visible */
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM,
> +			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
> +			   HWMON_I_ALARM),
>  	HWMON_CHANNEL_INFO(fan,
> -			   HWMON_F_INPUT,
> -			   HWMON_F_INPUT,
> -			   HWMON_F_INPUT,
> -			   HWMON_F_INPUT,
> -			   HWMON_F_INPUT,
> -			   HWMON_F_INPUT,
> -			   HWMON_F_INPUT,
> -			   HWMON_F_INPUT),
> +			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
> +			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
> +			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
> +			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
> +			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
> +			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
> +			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
> +			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM),
>  	HWMON_CHANNEL_INFO(pwm,
>  			   HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
>  			   HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
>  			   HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
>  			   HWMON_PWM_INPUT | HWMON_PWM_ENABLE),
>  	HWMON_CHANNEL_INFO(temp,
> -			   HWMON_T_INPUT,
> -			   HWMON_T_INPUT,
> -			   HWMON_T_INPUT,
> -			   HWMON_T_INPUT,
> -			   HWMON_T_INPUT,
> -			   HWMON_T_INPUT,
> -			   HWMON_T_INPUT,
> -			   HWMON_T_INPUT,
> -			   HWMON_T_INPUT),
> +			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
> +			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
> +			   HWMON_T_EMERGENCY_HYST,
> +			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
> +			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
> +			   HWMON_T_EMERGENCY_HYST,
> +			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
> +			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
> +			   HWMON_T_EMERGENCY_HYST,
> +			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
> +			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
> +			   HWMON_T_EMERGENCY_HYST,
> +			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
> +			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
> +			   HWMON_T_EMERGENCY_HYST,
> +			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
> +			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
> +			   HWMON_T_EMERGENCY_HYST,
> +			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
> +			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
> +			   HWMON_T_EMERGENCY_HYST,
> +			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
> +			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
> +			   HWMON_T_EMERGENCY_HYST,
> +			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
> +			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
> +			   HWMON_T_EMERGENCY_HYST),
>  	NULL
>  };
>  
> @@ -515,6 +887,8 @@ static int nct7904_probe(struct i2c_client *client,
>  
>  	/* CPU_TEMP attributes */
>  	ret = nct7904_read_reg(data, BANK_0, VT_ADC_CTRL0_REG);
> +	if (ret < 0)
> +		return ret;
>  
>  	if ((ret & 0x6) == 0x6)
>  		data->tcpu_mask |= 1; /* TR1 */
> @@ -527,37 +901,51 @@ static int nct7904_probe(struct i2c_client *client,
>  
>  	/* LTD */
>  	ret = nct7904_read_reg(data, BANK_0, VT_ADC_CTRL2_REG);
> +	if (ret < 0)
> +		return ret;
>  	if ((ret & 0x02) == 0x02)
>  		data->tcpu_mask |= 0x10;
>  
>  	/* Multi-Function detecting for Volt and TR/TD */
>  	ret = nct7904_read_reg(data, BANK_0, VT_ADC_MD_REG);
> +	if (ret < 0)
> +		return ret;
>  
> +	data->temp_mode = 0;
>  	for (i = 0; i < 4; i++) {
>  		val = (ret & (0x03 << i)) >> (i * 2);
>  		bit = (1 << i);
>  		if (val == 0)
>  			data->tcpu_mask &= ~bit;
> +		else if (val == 0x1 || val == 0x2)
> +			data->temp_mode |= bit;
>  	}
>  
>  	/* PECI */
>  	ret = nct7904_read_reg(data, BANK_2, PFE_REG);
> +	if (ret < 0)
> +		return ret;
>  	if (ret & 0x80) {
> -		data->enable_dts = 1; //Enable DTS & PECI
> +		data->enable_dts = 1; /* Enable DTS & PECI */
>  	} else {
>  		ret = nct7904_read_reg(data, BANK_2, TSI_CTRL_REG);
> +		if (ret < 0)
> +			return ret;
>  		if (ret & 0x80)
> -			data->enable_dts = 0x3; //Enable DTS & TSI
> +			data->enable_dts = 0x3; /* Enable DTS & TSI */
>  	}
>  
>  	/* Check DTS enable status */
>  	if (data->enable_dts) {
> -		data->has_dts =
> -			nct7904_read_reg(data, BANK_0, DTS_T_CTRL0_REG) & 0xF;
> -		if (data->enable_dts & 0x2) {
> -			data->has_dts |=
> -			(nct7904_read_reg(data, BANK_0, DTS_T_CTRL1_REG) & 0xF)
> -								<< 4;
> +		ret = nct7904_read_reg(data, BANK_0, DTS_T_CTRL0_REG) & 0xF;
> +		if (ret < 0)
> +			return ret;
> +		data->has_dts = ret;
> +		if (data->enable_dts & ENABLE_TSI) {
> +			ret = nct7904_read_reg(data, BANK_0, DTS_T_CTRL1_REG);
> +			if (ret < 0)
> +				return ret;
> +			data->has_dts |= (ret & 0xF) << 4;
>  		}
>  	}
>
diff mbox series

Patch

diff --git a/drivers/hwmon/nct7904.c b/drivers/hwmon/nct7904.c
index 6a74df6841f0..91d1eb822707 100644
--- a/drivers/hwmon/nct7904.c
+++ b/drivers/hwmon/nct7904.c
@@ -55,10 +55,33 @@ 
 #define DTS_T_CTRL1_REG		0x27
 #define VT_ADC_MD_REG		0x2E
 
+#define VSEN1_HV_LL_REG		0x02	/* Bank 1; 2 regs (HV/LV) per sensor */
+#define VSEN1_LV_LL_REG		0x03	/* Bank 1; 2 regs (HV/LV) per sensor */
+#define VSEN1_HV_HL_REG		0x00	/* Bank 1; 2 regs (HV/LV) per sensor */
+#define VSEN1_LV_HL_REG		0x01	/* Bank 1; 2 regs (HV/LV) per sensor */
+#define SMI_STS1_REG		0xC1	/* Bank 0; SMI Status Register */
+#define SMI_STS5_REG		0xC5	/* Bank 0; SMI Status Register */
+#define SMI_STS7_REG		0xC7	/* Bank 0; SMI Status Register */
+#define SMI_STS8_REG		0xC8	/* Bank 0; SMI Status Register */
+
 #define VSEN1_HV_REG		0x40	/* Bank 0; 2 regs (HV/LV) per sensor */
 #define TEMP_CH1_HV_REG		0x42	/* Bank 0; same as VSEN2_HV */
 #define LTD_HV_REG		0x62	/* Bank 0; 2 regs in VSEN range */
+#define LTD_HV_HL_REG		0x44	/* Bank 1; 1 reg for LTD */
+#define LTD_LV_HL_REG		0x45	/* Bank 1; 1 reg for LTD */
+#define LTD_HV_LL_REG		0x46	/* Bank 1; 1 reg for LTD */
+#define LTD_LV_LL_REG		0x47	/* Bank 1; 1 reg for LTD */
+#define TEMP_CH1_CH_REG		0x05	/* Bank 1; 1 reg for LTD */
+#define TEMP_CH1_W_REG		0x06	/* Bank 1; 1 reg for LTD */
+#define TEMP_CH1_WH_REG		0x07	/* Bank 1; 1 reg for LTD */
+#define TEMP_CH1_C_REG		0x04	/* Bank 1; 1 reg per sensor */
+#define DTS_T_CPU1_C_REG	0x90	/* Bank 1; 1 reg per sensor */
+#define DTS_T_CPU1_CH_REG	0x91	/* Bank 1; 1 reg per sensor */
+#define DTS_T_CPU1_W_REG	0x92	/* Bank 1; 1 reg per sensor */
+#define DTS_T_CPU1_WH_REG	0x93	/* Bank 1; 1 reg per sensor */
 #define FANIN1_HV_REG		0x80	/* Bank 0; 2 regs (HV/LV) per sensor */
+#define FANIN1_HV_HL_REG	0x60	/* Bank 1; 2 regs (HV/LV) per sensor */
+#define FANIN1_LV_HL_REG	0x61	/* Bank 1; 2 regs (HV/LV) per sensor */
 #define T_CPU1_HV_REG		0xA0	/* Bank 0; 2 regs (HV/LV) per sensor */
 
 #define PRTS_REG		0x03	/* Bank 2 */
@@ -67,6 +90,8 @@ 
 #define FANCTL1_FMR_REG		0x00	/* Bank 3; 1 reg per channel */
 #define FANCTL1_OUT_REG		0x10	/* Bank 3; 1 reg per channel */
 
+#define ENABLE_TSI	BIT(1)
+
 static const unsigned short normal_i2c[] = {
 	0x2d, 0x2e, I2C_CLIENT_END
 };
@@ -81,6 +106,7 @@  struct nct7904_data {
 	u8 fan_mode[FANCTL_MAX];
 	u8 enable_dts;
 	u8 has_dts;
+	u8 temp_mode; /* 0: TR mode, 1: TD mode */
 };
 
 /* Access functions */
@@ -179,6 +205,25 @@  static int nct7904_read_fan(struct device *dev, u32 attr, int channel,
 			rpm = 1350000 / cnt;
 		*val = rpm;
 		return 0;
+	case hwmon_fan_min:
+		ret = nct7904_read_reg16(data, BANK_1,
+					 FANIN1_HV_HL_REG + channel * 2);
+		if (ret < 0)
+			return ret;
+		cnt = ((ret & 0xff00) >> 3) | (ret & 0x1f);
+		if (cnt == 0x1fff)
+			rpm = 0;
+		else
+			rpm = 1350000 / cnt;
+		*val = rpm;
+		return 0;
+	case hwmon_fan_alarm:
+		ret = nct7904_read_reg(data, BANK_0,
+				       SMI_STS7_REG + (channel >> 3));
+		if (ret < 0)
+			return ret;
+		*val = (ret >> (channel & 0x07)) & 1;
+		return 0;
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -188,8 +233,18 @@  static umode_t nct7904_fan_is_visible(const void *_data, u32 attr, int channel)
 {
 	const struct nct7904_data *data = _data;
 
-	if (attr == hwmon_fan_input && data->fanin_mask & (1 << channel))
-		return 0444;
+	switch (attr) {
+	case hwmon_fan_input:
+	case hwmon_fan_alarm:
+		if (data->fanin_mask & (1 << channel))
+			return 0444;
+	case hwmon_fan_min:
+		if (data->fanin_mask & (1 << channel))
+			return 0644;
+	default:
+		break;
+	}
+
 	return 0;
 }
 
@@ -220,6 +275,37 @@  static int nct7904_read_in(struct device *dev, u32 attr, int channel,
 			volt *= 6; /* 0.006V scale */
 		*val = volt;
 		return 0;
+	case hwmon_in_min:
+		ret = nct7904_read_reg16(data, BANK_1,
+					 VSEN1_HV_LL_REG + index * 4);
+		if (ret < 0)
+			return ret;
+		volt = ((ret & 0xff00) >> 5) | (ret & 0x7);
+		if (index < 14)
+			volt *= 2; /* 0.002V scale */
+		else
+			volt *= 6; /* 0.006V scale */
+		*val = volt;
+		return 0;
+	case hwmon_in_max:
+		ret = nct7904_read_reg16(data, BANK_1,
+					 VSEN1_HV_HL_REG + index * 4);
+		if (ret < 0)
+			return ret;
+		volt = ((ret & 0xff00) >> 5) | (ret & 0x7);
+		if (index < 14)
+			volt *= 2; /* 0.002V scale */
+		else
+			volt *= 6; /* 0.006V scale */
+		*val = volt;
+		return 0;
+	case hwmon_in_alarm:
+		ret = nct7904_read_reg(data, BANK_0,
+				       SMI_STS1_REG + (index >> 3));
+		if (ret < 0)
+			return ret;
+		*val = (ret >> (index & 0x07)) & 1;
+		return 0;
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -230,9 +316,18 @@  static umode_t nct7904_in_is_visible(const void *_data, u32 attr, int channel)
 	const struct nct7904_data *data = _data;
 	int index = nct7904_chan_to_index[channel];
 
-	if (channel > 0 && attr == hwmon_in_input &&
-	    (data->vsen_mask & BIT(index)))
-		return 0444;
+	switch (attr) {
+	case hwmon_in_input:
+	case hwmon_in_alarm:
+		if (channel > 0 && (data->vsen_mask & BIT(index)))
+			return 0444;
+	case hwmon_in_min:
+	case hwmon_in_max:
+		if (channel > 0 && (data->vsen_mask & BIT(index)))
+			return 0644;
+	default:
+		break;
+	}
 
 	return 0;
 }
@@ -242,6 +337,7 @@  static int nct7904_read_temp(struct device *dev, u32 attr, int channel,
 {
 	struct nct7904_data *data = dev_get_drvdata(dev);
 	int ret, temp;
+	unsigned int reg1, reg2, reg3;
 
 	switch (attr) {
 	case hwmon_temp_input:
@@ -259,16 +355,100 @@  static int nct7904_read_temp(struct device *dev, u32 attr, int channel,
 		temp = ((ret & 0xff00) >> 5) | (ret & 0x7);
 		*val = sign_extend32(temp, 10) * 125;
 		return 0;
+	case hwmon_temp_alarm:
+		if (channel < 5) {
+			ret = nct7904_read_reg(data, BANK_0,
+					       SMI_STS1_REG);
+			if (ret < 0)
+				return ret;
+			*val = (ret >> (channel & 0x07)) & 1;
+		} else {
+			if ((channel - 5) < 4) {
+				ret = nct7904_read_reg(data, BANK_0,
+						       SMI_STS7_REG +
+						       ((channel - 5) >> 3));
+				if (ret < 0)
+					return ret;
+				*val = (ret >> ((channel - 5) & 0x07)) & 1;
+			} else {
+				ret = nct7904_read_reg(data, BANK_0,
+						       SMI_STS8_REG +
+						       ((channel - 5) >> 3));
+				if (ret < 0)
+					return ret;
+				*val = (ret >> (((channel - 5) & 0x07) - 4))
+							& 1;
+			}
+		}
+		return 0;
+	case hwmon_temp_type:
+		if (channel < 5) {
+			if ((data->tcpu_mask >> channel) & 0x01) {
+				if ((data->temp_mode >> channel) & 0x01)
+					*val = 3; /* TD */
+				else
+					*val = 4; /* TR */
+			} else {
+				*val = 0;
+			}
+		} else {
+			if ((data->has_dts >> (channel - 5)) & 0x01) {
+				if (data->enable_dts & ENABLE_TSI)
+					*val = 5; /* TSI */
+				else
+					*val = 6; /* PECI */
+			} else {
+				*val = 0;
+			}
+		}
+		return 0;
+	case hwmon_temp_max:
+		reg1 = LTD_HV_HL_REG;
+		reg2 = TEMP_CH1_C_REG;
+		reg3 = DTS_T_CPU1_C_REG;
+		break;
+	case hwmon_temp_max_hyst:
+		reg1 = LTD_LV_HL_REG;
+		reg2 = TEMP_CH1_CH_REG;
+		reg3 = DTS_T_CPU1_CH_REG;
+		break;
+	case hwmon_temp_emergency:
+		reg1 = LTD_HV_LL_REG;
+		reg2 = TEMP_CH1_W_REG;
+		reg3 = DTS_T_CPU1_W_REG;
+		break;
+	case hwmon_temp_emergency_hyst:
+		reg1 = LTD_LV_LL_REG;
+		reg2 = TEMP_CH1_WH_REG;
+		reg3 = DTS_T_CPU1_WH_REG;
+		break;
 	default:
 		return -EOPNOTSUPP;
 	}
+
+	if (channel == 4)
+		ret = nct7904_read_reg(data, BANK_1, reg1);
+	else if (channel < 5)
+		ret = nct7904_read_reg(data, BANK_1,
+				       reg2 + channel * 8);
+	else
+		ret = nct7904_read_reg(data, BANK_1,
+				       reg3 + (channel - 5) * 4);
+
+	if (ret < 0)
+		return ret;
+	*val = ret * 1000;
+	return 0;
 }
 
 static umode_t nct7904_temp_is_visible(const void *_data, u32 attr, int channel)
 {
 	const struct nct7904_data *data = _data;
 
-	if (attr == hwmon_temp_input) {
+	switch (attr) {
+	case hwmon_temp_input:
+	case hwmon_temp_alarm:
+	case hwmon_temp_type:
 		if (channel < 5) {
 			if (data->tcpu_mask & BIT(channel))
 				return 0444;
@@ -276,6 +456,19 @@  static umode_t nct7904_temp_is_visible(const void *_data, u32 attr, int channel)
 			if (data->has_dts & BIT(channel - 5))
 				return 0444;
 		}
+	case hwmon_temp_max:
+	case hwmon_temp_max_hyst:
+	case hwmon_temp_emergency:
+	case hwmon_temp_emergency_hyst:
+		if (channel < 5) {
+			if (data->tcpu_mask & BIT(channel))
+				return 0644;
+		} else {
+			if (data->has_dts & BIT(channel - 5))
+				return 0644;
+		}
+	default:
+		break;
 	}
 
 	return 0;
@@ -306,6 +499,139 @@  static int nct7904_read_pwm(struct device *dev, u32 attr, int channel,
 	}
 }
 
+static int nct7904_write_temp(struct device *dev, u32 attr, int channel,
+			      long val)
+{
+	struct nct7904_data *data = dev_get_drvdata(dev);
+	int ret, index;
+	unsigned int reg1, reg2, reg3;
+
+	index = nct7904_chan_to_index[channel];
+	val = clamp_val(val / 1000, -128, 127);
+
+	switch (attr) {
+	case hwmon_temp_max:
+		reg1 = LTD_HV_HL_REG;
+		reg2 = TEMP_CH1_C_REG;
+		reg3 = DTS_T_CPU1_C_REG;
+		break;
+	case hwmon_temp_max_hyst:
+		reg1 = LTD_LV_HL_REG;
+		reg2 = TEMP_CH1_CH_REG;
+		reg3 = DTS_T_CPU1_CH_REG;
+		break;
+	case hwmon_temp_emergency:
+		reg1 = LTD_HV_LL_REG;
+		reg2 = TEMP_CH1_W_REG;
+		reg3 = DTS_T_CPU1_W_REG;
+		break;
+	case hwmon_temp_emergency_hyst:
+		reg1 = LTD_LV_LL_REG;
+		reg2 = TEMP_CH1_WH_REG;
+		reg3 = DTS_T_CPU1_WH_REG;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+	if (channel == 4)
+		ret = nct7904_write_reg(data, BANK_1, reg1, val);
+	else if (channel < 5)
+		ret = nct7904_write_reg(data, BANK_1,
+					reg2 + channel * 8, val);
+	else
+		ret = nct7904_write_reg(data, BANK_1,
+					reg3 + (channel - 5) * 4, val);
+
+	return ret;
+}
+
+static int nct7904_write_fan(struct device *dev, u32 attr, int channel,
+			     long val)
+{
+	struct nct7904_data *data = dev_get_drvdata(dev);
+	int ret;
+	u8 tmp;
+
+	switch (attr) {
+	case hwmon_fan_min:
+		if (val <= 0)
+			return 0x1fff;
+
+		val = clamp_val((1350000 + (val >> 1)) / val, 1, 0x1fff);
+		tmp = (val >> 5) & 0xff;
+		ret = nct7904_write_reg(data, BANK_1,
+					FANIN1_HV_HL_REG + channel * 2, tmp);
+		if (ret < 0)
+			return ret;
+		tmp = val & 0x1f;
+		ret = nct7904_write_reg(data, BANK_1,
+					FANIN1_LV_HL_REG + channel * 2, tmp);
+		return ret;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int nct7904_write_in(struct device *dev, u32 attr, int channel,
+			    long val)
+{
+	struct nct7904_data *data = dev_get_drvdata(dev);
+	int ret, index;
+	u8 tmp;
+
+	index = nct7904_chan_to_index[channel];
+
+	if (index < 14)
+		val = val / 2; /* 0.002V scale */
+	else
+		val = val / 6; /* 0.006V scale */
+
+	val = clamp_val(val, 0, 0x7ff); /* Bit 15 is sign bit */
+
+	switch (attr) {
+	case hwmon_in_min:
+		tmp = nct7904_read_reg(data, BANK_1,
+				       VSEN1_LV_LL_REG + index * 4);
+		if (tmp < 0)
+			return tmp;
+		tmp &= ~0x7;
+		tmp |= val & 0x7;
+		ret = nct7904_write_reg(data, BANK_1,
+					VSEN1_LV_LL_REG + index * 4, tmp);
+		if (ret < 0)
+			return ret;
+		tmp = nct7904_read_reg(data, BANK_1,
+				       VSEN1_HV_LL_REG + index * 4);
+		if (tmp < 0)
+			return tmp;
+		tmp = (val >> 3) & 0xff;
+		ret = nct7904_write_reg(data, BANK_1,
+					VSEN1_HV_LL_REG + index * 4, tmp);
+		return ret;
+	case hwmon_in_max:
+		tmp = nct7904_read_reg(data, BANK_1,
+				       VSEN1_LV_HL_REG + index * 4);
+		if (tmp < 0)
+			return tmp;
+		tmp &= ~0x7;
+		tmp |= val & 0x7;
+		ret = nct7904_write_reg(data, BANK_1,
+					VSEN1_LV_HL_REG + index * 4, tmp);
+		if (ret < 0)
+			return ret;
+		tmp = nct7904_read_reg(data, BANK_1,
+				       VSEN1_HV_LL_REG + index * 4);
+		if (tmp < 0)
+			return tmp;
+		tmp = (val >> 3) & 0xff;
+		ret = nct7904_write_reg(data, BANK_1,
+					VSEN1_HV_LL_REG + index * 4, tmp);
+		return ret;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
 static int nct7904_write_pwm(struct device *dev, u32 attr, int channel,
 			     long val)
 {
@@ -363,8 +689,14 @@  static int nct7904_write(struct device *dev, enum hwmon_sensor_types type,
 			 u32 attr, int channel, long val)
 {
 	switch (type) {
+	case hwmon_in:
+		return nct7904_write_in(dev, attr, channel, val);
+	case hwmon_fan:
+		return nct7904_write_fan(dev, attr, channel, val);
 	case hwmon_pwm:
 		return nct7904_write_pwm(dev, attr, channel, val);
+	case hwmon_temp:
+		return nct7904_write_temp(dev, attr, channel, val);
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -413,51 +745,91 @@  static int nct7904_detect(struct i2c_client *client,
 
 static const struct hwmon_channel_info *nct7904_info[] = {
 	HWMON_CHANNEL_INFO(in,
-			   HWMON_I_INPUT, /* dummy, skipped in is_visible */
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT,
-			   HWMON_I_INPUT),
+			   /* dummy, skipped in is_visible */
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM),
 	HWMON_CHANNEL_INFO(fan,
-			   HWMON_F_INPUT,
-			   HWMON_F_INPUT,
-			   HWMON_F_INPUT,
-			   HWMON_F_INPUT,
-			   HWMON_F_INPUT,
-			   HWMON_F_INPUT,
-			   HWMON_F_INPUT,
-			   HWMON_F_INPUT),
+			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
+			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
+			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
+			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
+			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
+			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
+			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
+			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM),
 	HWMON_CHANNEL_INFO(pwm,
 			   HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
 			   HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
 			   HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
 			   HWMON_PWM_INPUT | HWMON_PWM_ENABLE),
 	HWMON_CHANNEL_INFO(temp,
-			   HWMON_T_INPUT,
-			   HWMON_T_INPUT,
-			   HWMON_T_INPUT,
-			   HWMON_T_INPUT,
-			   HWMON_T_INPUT,
-			   HWMON_T_INPUT,
-			   HWMON_T_INPUT,
-			   HWMON_T_INPUT,
-			   HWMON_T_INPUT),
+			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
+			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
+			   HWMON_T_EMERGENCY_HYST,
+			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
+			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
+			   HWMON_T_EMERGENCY_HYST,
+			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
+			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
+			   HWMON_T_EMERGENCY_HYST,
+			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
+			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
+			   HWMON_T_EMERGENCY_HYST,
+			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
+			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
+			   HWMON_T_EMERGENCY_HYST,
+			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
+			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
+			   HWMON_T_EMERGENCY_HYST,
+			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
+			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
+			   HWMON_T_EMERGENCY_HYST,
+			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
+			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
+			   HWMON_T_EMERGENCY_HYST,
+			   HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
+			   HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_EMERGENCY |
+			   HWMON_T_EMERGENCY_HYST),
 	NULL
 };
 
@@ -515,6 +887,8 @@  static int nct7904_probe(struct i2c_client *client,
 
 	/* CPU_TEMP attributes */
 	ret = nct7904_read_reg(data, BANK_0, VT_ADC_CTRL0_REG);
+	if (ret < 0)
+		return ret;
 
 	if ((ret & 0x6) == 0x6)
 		data->tcpu_mask |= 1; /* TR1 */
@@ -527,37 +901,51 @@  static int nct7904_probe(struct i2c_client *client,
 
 	/* LTD */
 	ret = nct7904_read_reg(data, BANK_0, VT_ADC_CTRL2_REG);
+	if (ret < 0)
+		return ret;
 	if ((ret & 0x02) == 0x02)
 		data->tcpu_mask |= 0x10;
 
 	/* Multi-Function detecting for Volt and TR/TD */
 	ret = nct7904_read_reg(data, BANK_0, VT_ADC_MD_REG);
+	if (ret < 0)
+		return ret;
 
+	data->temp_mode = 0;
 	for (i = 0; i < 4; i++) {
 		val = (ret & (0x03 << i)) >> (i * 2);
 		bit = (1 << i);
 		if (val == 0)
 			data->tcpu_mask &= ~bit;
+		else if (val == 0x1 || val == 0x2)
+			data->temp_mode |= bit;
 	}
 
 	/* PECI */
 	ret = nct7904_read_reg(data, BANK_2, PFE_REG);
+	if (ret < 0)
+		return ret;
 	if (ret & 0x80) {
-		data->enable_dts = 1; //Enable DTS & PECI
+		data->enable_dts = 1; /* Enable DTS & PECI */
 	} else {
 		ret = nct7904_read_reg(data, BANK_2, TSI_CTRL_REG);
+		if (ret < 0)
+			return ret;
 		if (ret & 0x80)
-			data->enable_dts = 0x3; //Enable DTS & TSI
+			data->enable_dts = 0x3; /* Enable DTS & TSI */
 	}
 
 	/* Check DTS enable status */
 	if (data->enable_dts) {
-		data->has_dts =
-			nct7904_read_reg(data, BANK_0, DTS_T_CTRL0_REG) & 0xF;
-		if (data->enable_dts & 0x2) {
-			data->has_dts |=
-			(nct7904_read_reg(data, BANK_0, DTS_T_CTRL1_REG) & 0xF)
-								<< 4;
+		ret = nct7904_read_reg(data, BANK_0, DTS_T_CTRL0_REG) & 0xF;
+		if (ret < 0)
+			return ret;
+		data->has_dts = ret;
+		if (data->enable_dts & ENABLE_TSI) {
+			ret = nct7904_read_reg(data, BANK_0, DTS_T_CTRL1_REG);
+			if (ret < 0)
+				return ret;
+			data->has_dts |= (ret & 0xF) << 4;
 		}
 	}