hwmon: (nct6775) Add support for fan debounce module parameter
If set, fan debounce is enabled when loading the driver. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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1 changed files with 28 additions and 0 deletions
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@ -72,6 +72,10 @@ static unsigned short force_id;
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module_param(force_id, ushort, 0);
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MODULE_PARM_DESC(force_id, "Override the detected device ID");
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static unsigned short fan_debounce;
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module_param(fan_debounce, ushort, 0);
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MODULE_PARM_DESC(fan_debounce, "Enable debouncing for fan RPM signal");
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#define DRVNAME "nct6775"
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/*
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@ -183,6 +187,8 @@ static const u16 NCT6775_REG_IN[] = {
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#define NCT6775_REG_FANDIV1 0x506
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#define NCT6775_REG_FANDIV2 0x507
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#define NCT6775_REG_CR_FAN_DEBOUNCE 0xf0
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static const u16 NCT6775_REG_ALARM[NUM_REG_ALARM] = { 0x459, 0x45A, 0x45B };
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/* 0..15 voltages, 16..23 fans, 24..31 temperatures */
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@ -2110,6 +2116,28 @@ static int nct6775_probe(struct platform_device *pdev)
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*/
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superio_select(sio_data->sioreg, NCT6775_LD_VID);
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data->vid = superio_inb(sio_data->sioreg, 0xe3);
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if (fan_debounce) {
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u8 tmp;
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superio_select(sio_data->sioreg, NCT6775_LD_HWM);
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tmp = superio_inb(sio_data->sioreg,
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NCT6775_REG_CR_FAN_DEBOUNCE);
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switch (data->kind) {
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case nct6775:
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tmp |= 0x1e;
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break;
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case nct6776:
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case nct6779:
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tmp |= 0x3e;
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break;
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}
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superio_outb(sio_data->sioreg, NCT6775_REG_CR_FAN_DEBOUNCE,
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tmp);
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dev_info(&pdev->dev, "Enabled fan debounce for chip %s\n",
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data->name);
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}
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superio_exit(sio_data->sioreg);
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err = device_create_file(dev, &dev_attr_cpu0_vid);
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