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| author | Andrew Paprocki <andrew@ishiboo.com> | 2008-08-06 22:41:06 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@mahadeva.delvare> | 2008-08-06 22:41:06 +0200 |
| commit | 816d8c6a2580562698cf0fa0b9e5b4dd570e636e (patch) | |
| tree | 6f2b41ba4e144a04315fe56cb50998e8cd3ae24d /drivers/hwmon/it87.c | |
| parent | 0475169c13e177e1af5a02f5e9f30fda13dc0b86 (diff) | |
| download | kernel_samsung_smdk4412-816d8c6a2580562698cf0fa0b9e5b4dd570e636e.zip kernel_samsung_smdk4412-816d8c6a2580562698cf0fa0b9e5b4dd570e636e.tar.gz kernel_samsung_smdk4412-816d8c6a2580562698cf0fa0b9e5b4dd570e636e.tar.bz2 | |
hwmon: (it87) Support for 16-bit fan reading in it8705 >= rev 0x03
The it8705 chip supports 16-bit fan tachometers in revisions at least
>= 0x03 (Version G). This patch enables 16-bit fan readings on all
revisions >= 0x03 just like the it8712, it8716, and it8718 chips.
Signed-off-by: Andrew Paprocki <andrew@ishiboo.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon/it87.c')
| -rw-r--r-- | drivers/hwmon/it87.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c index 2a36568..30cdb09 100644 --- a/drivers/hwmon/it87.c +++ b/drivers/hwmon/it87.c @@ -272,9 +272,11 @@ struct it87_data { static inline int has_16bit_fans(const struct it87_data *data) { - /* IT8712F Datasheet 0.9.1, section 8.3.5 indicates 7h == Version I. - This is the first revision with 16bit tachometer support. */ - return (data->type == it8712 && data->revision >= 0x07) + /* IT8705F Datasheet 0.4.1, 3h == Version G. + IT8712F Datasheet 0.9.1, section 8.3.5 indicates 7h == Version I. + These are the first revisions with 16bit tachometer support. */ + return (data->type == it87 && data->revision >= 0x03) + || (data->type == it8712 && data->revision >= 0x07) || data->type == it8716 || data->type == it8718; } @@ -1370,10 +1372,13 @@ static void __devinit it87_init_device(struct platform_device *pdev) it87_write_value(data, IT87_REG_FAN_16BIT, tmp | 0x07); } - if (tmp & (1 << 4)) - data->has_fan |= (1 << 3); /* fan4 enabled */ - if (tmp & (1 << 5)) - data->has_fan |= (1 << 4); /* fan5 enabled */ + /* IT8705F only supports three fans. */ + if (data->type != it87) { + if (tmp & (1 << 4)) + data->has_fan |= (1 << 3); /* fan4 enabled */ + if (tmp & (1 << 5)) + data->has_fan |= (1 << 4); /* fan5 enabled */ + } } /* Set current fan mode registers and the default settings for the |