drivers/hwmon/g762.c

3  * g762 - Driver for the Global Mixed-mode Technology Inc. fan speed
67 #define G762_REG_FAN_CMD1_FAN_MODE      0x10 /* fan mode: closed/open-loop */
71 #define G762_REG_FAN_CMD1_PULSE_PER_REV 0x01 /* pulse per fan revolution */
73 #define G762_REG_FAN_CMD2_GEAR_MODE_1   0x08 /* fan gear mode */
75 #define G762_REG_FAN_CMD2_FAN_STARTV_1  0x02 /* fan startup voltage */
78 #define G762_REG_FAN_STA_FAIL           0x02 /* fan fail */
79 #define G762_REG_FAN_STA_OOC            0x01 /* fan out of control */
95  * Extract pulse count per fan revolution value (2 or 4) from given
102  * Extract fan clock divisor (1, 2, 4 or 8) from given FAN_CMD1
110  * Extract fan gear mode multiplier value (0, 2 or 4) from given
131 	u8 set_cnt;  /* controls fan rotation speed in closed-loop mode */
132 	u8 act_cnt;  /* provides access to current fan RPM value */
133 	u8 fan_sta;  /* bit 0: set when actual fan speed is more than
134 		      *        25% outside requested fan speed
135 		      * bit 1: set when no transition occurs on fan
138 	u8 set_out;  /* controls fan rotation speed in open-loop mode */
145 		      *         00: Divide fan clock by 1
146 		      *         01: Divide fan clock by 2
147 		      *         10: Divide fan clock by 4
148 		      *         11: Divide fan clock by 8
151 		      *   6: DET_FAN_OOC enable "fan ooc" status
152 		      *   7: DET_FAN_FAIL enable "fan fail" status
164  * Convert count value from fan controller register (FAN_SET_CNT) into fan
166  * influence of additional parameters (fan clock divisor, fan gear mode)
172 	if (cnt == 0xff)  /* setting cnt to 255 stops the fan */  in rpm_from_cnt()
179  * Convert fan RPM value from sysfs into count value for fan controller
188 	if (!rpm)	/* to stop the fan, set cnt to 255 */  in cnt_from_rpm()
300 /* Set fan clock divisor. Accepts either 1, 2, 4 or 8. */
340 /* Set fan gear mode. Accepts either 0, 1 or 2. */
376 /* Set number of fan pulses per revolution. Accepts either 2 or 4. */
406 /* Set fan mode. Accepts either 1 (open-loop) or 2 (closed-loop). */
424 		 * unknown reason, fan will not rotate as expected, no matter  in do_set_pwm_enable()
478  * Set pwm value. Accepts values between 0 (stops the fan) and
499  * Set fan RPM value. Can be called both in closed and open-loop mode
523 /* Set fan startup voltage. Accepted values are either 0, 1, 2 or 3. */
720  * Read function for fan1_input sysfs file. Return current fan RPM value, or
721  * 0 if fan is out of control.
733 	/* reverse logic: fan out of control reporting is enabled low */  in fan1_input_show()
746  * Read and write functions for pwm1_mode sysfs file. Get and set fan speed
779  * Read and write functions for fan1_div sysfs file. Get and set fan
811  * of tachometer pulses per fan revolution.
842  * Read and write functions for pwm1_enable. Get and set fan speed control mode
848  *  0 : no fan speed control (i.e. fan at full speed)
849  *  1 : manual fan speed control enabled (use pwm[1-*]) (open-loop)
850  *  2+: automatic fan speed control enabled (use fan[1-*]_target) (closed-loop)
886  * (which affects fan speed) in open-loop mode. 0 stops the fan and 255
917  * Read and write function for fan1_target sysfs file. Get/set the fan speed in
919  * the fan speed using pulses from fan tachometer.
1017  * Enable both fan failure detection and fan out of control protection. The
1055 	/* Enable fan failure detection and fan out of control protection */  in g762_probe()