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Commit 00fd4cfe authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (nct6775) Improve fan6/pwm6 support 



Improve fan6/pwm6 detection on NCT6795D. Add support for fan pulses
for fans 4..6 and fan min limits for fan6.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent e2617262

drivers/hwmon/nct6775.c

+30 −7
Original line number Diff line number Diff line
@@ -419,8 +419,10 @@ static const u16 NCT6776_REG_TOLERANCE_H[] = { 
static const u8 NCT6776_REG_PWM_MODE[] = { 0x04, 0, 0, 0, 0, 0 };

static const u8 NCT6776_PWM_MODE_MASK[] = { 0x01, 0, 0, 0, 0, 0 };



static const u16 NCT6776_REG_FAN_MIN[] = { 0x63a, 0x63c, 0x63e, 0x640, 0x642 };

static const u16 NCT6776_REG_FAN_PULSES[] = { 0x644, 0x645, 0x646, 0, 0 };

static const u16 NCT6776_REG_FAN_MIN[] = {

	0x63a, 0x63c, 0x63e, 0x640, 0x642, 0x64a };

static const u16 NCT6776_REG_FAN_PULSES[] = {

	0x644, 0x645, 0x646, 0x647, 0x648, 0x649 };



static const u16 NCT6776_REG_WEIGHT_DUTY_BASE[] = {

	0x13e, 0x23e, 0x33e, 0x83e, 0x93e, 0xa3e };
@@ -1235,7 +1237,7 @@ static bool is_word_sized(struct nct6775_data *data, u16 reg) 
		  ((reg & 0xfff0) == 0x4b0 && (reg & 0x000f) < 0x0b) ||

		  reg == 0x402 ||

		  reg == 0x63a || reg == 0x63c || reg == 0x63e ||

		  reg == 0x640 || reg == 0x642 ||

		  reg == 0x640 || reg == 0x642 || reg == 0x64a ||

		  reg == 0x73 || reg == 0x75 || reg == 0x77 || reg == 0x79 ||

		  reg == 0x7b || reg == 0x7d;

	}
@@ -3439,7 +3441,8 @@ nct6775_check_fan_inputs(struct nct6775_data *data) 
		pwm5pin = false;

		pwm6pin = false;

	} else { /* NCT6779D, NCT6791D, NCT6792D, NCT6793D, or NCT6795D */

		int regval_1b, regval_2a, regval_eb;

		int regval_1b, regval_2a, regval_2f, regval_eb;

		bool dsw_en;



		regval = superio_inb(sioreg, 0x1c);
@@ -3462,14 +3465,22 @@ nct6775_check_fan_inputs(struct nct6775_data *data) 
		case nct6795:

			regval_1b = superio_inb(sioreg, 0x1b);

			regval_2a = superio_inb(sioreg, 0x2a);

			regval_2f = superio_inb(sioreg, 0x2f);

			dsw_en = regval_2f & BIT(3);



			if (!pwm5pin)

				pwm5pin = regval & BIT(7);

			fan6pin = regval & BIT(1);

			pwm6pin = regval & BIT(0);



			if (!fan5pin)

				fan5pin = regval_1b & BIT(5);



			fan6pin = false;

			pwm6pin = false;

			if (!dsw_en) {

				fan6pin = regval & BIT(1);

				pwm6pin = regval & BIT(0);

			}



			superio_select(sioreg, NCT6775_LD_12);

			regval_eb = superio_inb(sioreg, 0xeb);

			if (!fan5pin)
@@ -3481,6 +3492,18 @@ nct6775_check_fan_inputs(struct nct6775_data *data) 
				fan6pin = regval_eb & BIT(3);

			if (!pwm6pin)

				pwm6pin = regval_eb & BIT(2);



			if (data->kind == nct6795) {

				int regval_ed = superio_inb(sioreg, 0xed);



				if (!fan6pin)

					fan6pin = (regval_2a & BIT(4)) &&

					  (!dsw_en ||

					   (dsw_en && (regval_ed & BIT(4))));

				if (!pwm6pin)

					pwm6pin = (regval_2a & BIT(3)) &&

					  (regval_ed & BIT(2));

			}

			break;

		default:	/* NCT6779D */

			fan6pin = false;
@@ -3495,7 +3518,7 @@ nct6775_check_fan_inputs(struct nct6775_data *data) 
	data->has_fan = 0x03 | (fan3pin << 2) | (fan4pin << 3) |

		(fan5pin << 4) | (fan6pin << 5);

	data->has_fan_min = 0x03 | (fan3pin << 2) | (fan4min << 3) |

		(fan5pin << 4);

		(fan5pin << 4) | (fan6pin << 5);

	data->has_pwm = 0x03 | (pwm3pin << 2) | (pwm4pin << 3) |

		(pwm5pin << 4) | (pwm6pin << 5);

}