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Fix PWM polarity on read, hopefully for good this time.

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Fix broken comment about PWM enable bit.
Clean up the PWM enable/disable code.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2981 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Jean Delvare committed 2005-04-24 18:22:10 +00:00
1 parent f5cce4c8f1
commit f922d71607
1 file changed
+6 -9
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kernel/chips/smsc47m1.c
+6 -9
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@@ -134,7 +134,7 @@ struct smsc47m1_data {
u8 fan_min[2]; /* Register value */
u8 fan_div[2]; /* Register encoding, shifted right */
u8 alarms; /* Register encoding */
u8 pwm[2]; /* Register value (bit 7 is enable) */
u8 pwm[2]; /* Register value (bit 0 is disable) */
};
@@ -455,21 +455,18 @@ void smsc47m1_pwm(struct i2c_client *client, int operation, int ctl_name,
else if (operation == SENSORS_PROC_REAL_READ) {
smsc47m1_update_client(client);
results[0] = PWM_FROM_REG(data->pwm[nr - 1]);
results[1] = data->pwm[nr - 1] & 0x01;
results[1] = !(data->pwm[nr - 1] & 0x01);
*nrels_mag = 2;
} else if (operation == SENSORS_PROC_REAL_WRITE) {
if (*nrels_mag >= 1) {
data->pwm[nr - 1] &= 0x81;
data->pwm[nr - 1] = smsc47m1_read_value(client,
SMSC47M1_REG_PWM(nr)) & 0x81;
data->pwm[nr - 1] |= PWM_TO_REG(results[0]);
if (*nrels_mag >= 2) {
if(results[1] && (data->pwm[nr-1] & 0x01)) {
if (results[1]) {
/* enable PWM */
/* hope BIOS did it already
smsc47m1_write_value(client,
SMSC47M1_REG_PPIN(nr), 0x04);
*/
data->pwm[nr - 1] &= 0xfe;
} else if((!results[1]) && (!(data->pwm[nr-1] & 0x01))) {
} else {
/* disable PWM */
data->pwm[nr - 1] |= 0x01;
}