From b63d97a36edb1aecf8c13e5f5783feff4d64c24b Mon Sep 17 00:00:00 2001 From: Chris D Schimp Date: Mon, 20 Feb 2012 16:59:24 -0500 Subject: [PATCH] hwmon: (max6639) Fix FAN_FROM_REG calculation RPM calculation from tachometer value does not depend on PPR. Also, do not report negative RPM values. Signed-off-by: Chris D Schimp [guenter.roeck@ericsson.com: do not report negative RPM values] Signed-off-by: Guenter Roeck Cc: stable@vger.kernel.org # 3.0+ Acked-by: Roland Stigge --- drivers/hwmon/max6639.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/hwmon/max6639.c b/drivers/hwmon/max6639.c index e10a092c603c..13e58a1992cf 100644 --- a/drivers/hwmon/max6639.c +++ b/drivers/hwmon/max6639.c @@ -72,8 +72,8 @@ static unsigned short normal_i2c[] = { 0x2c, 0x2e, 0x2f, I2C_CLIENT_END }; static const int rpm_ranges[] = { 2000, 4000, 8000, 16000 }; -#define FAN_FROM_REG(val, div, rpm_range) ((val) == 0 ? -1 : \ - (val) == 255 ? 0 : (rpm_ranges[rpm_range] * 30) / ((div + 1) * (val))) +#define FAN_FROM_REG(val, rpm_range) ((val) == 0 || (val) == 255 ? \ + 0 : (rpm_ranges[rpm_range] * 30) / (val)) #define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val) / 1000, 0, 255) /* @@ -333,7 +333,7 @@ static ssize_t show_fan_input(struct device *dev, return PTR_ERR(data); return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], - data->ppr, data->rpm_range)); + data->rpm_range)); } static ssize_t show_alarm(struct device *dev, -- 2.20.1