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| author | Jean Delvare <khali@linux-fr.org> | 2006-02-05 23:13:48 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-02-13 22:30:09 -0800 |
| commit | c7f5d7edd8b3fa4204389efc4c9081cc90a811d2 (patch) | |
| tree | 1264bb18887b398ea2dccbba03ade05bf9fe9539 /drivers/hwmon/w83781d.c | |
| parent | e3efa5a7392e07471b5d0ef7e7cd7ab862f70284 (diff) | |
| download | lwn-c7f5d7edd8b3fa4204389efc4c9081cc90a811d2.tar.gz lwn-c7f5d7edd8b3fa4204389efc4c9081cc90a811d2.zip | |
[PATCH] w83781d: Use real-time status registers
Use the real-time status registers of the Winbond W83782D, W83783S and
W83627HF chips, instead of the interrupt status registers. Interrupts
cannot be trusted at least for voltage inputs, as they are two-times
triggers (as opposed to comparator mode, which we want.) The w83627hf
driver was fixed in a similar way some times ago.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/hwmon/w83781d.c')
| -rw-r--r-- | drivers/hwmon/w83781d.c | 43 |
1 files changed, 25 insertions, 18 deletions
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c index 557114872f3c..64c1f8af5bb2 100644 --- a/drivers/hwmon/w83781d.c +++ b/drivers/hwmon/w83781d.c @@ -95,11 +95,16 @@ MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization"); (0x39))) #define W83781D_REG_CONFIG 0x40 + +/* Interrupt status (W83781D, AS99127F) */ #define W83781D_REG_ALARM1 0x41 #define W83781D_REG_ALARM2 0x42 -#define W83781D_REG_ALARM3 0x450 /* not on W83781D */ -#define W83781D_REG_IRQ 0x4C +/* Real-time status (W83782D, W83783S, W83627HF) */ +#define W83782D_REG_ALARM1 0x459 +#define W83782D_REG_ALARM2 0x45A +#define W83782D_REG_ALARM3 0x45B + #define W83781D_REG_BEEP_CONFIG 0x4D #define W83781D_REG_BEEP_INTS1 0x56 #define W83781D_REG_BEEP_INTS2 0x57 @@ -1513,15 +1518,6 @@ w83781d_init_client(struct i2c_client *client) W83781D_REG_TEMP3_CONFIG, tmp & 0xfe); } } - - if (type != w83781d) { - /* enable comparator mode for temp2 and temp3 so - alarm indication will work correctly */ - i = w83781d_read_value(client, W83781D_REG_IRQ); - if (!(i & 0x40)) - w83781d_write_value(client, W83781D_REG_IRQ, - i | 0x40); - } } /* Start monitoring */ @@ -1612,14 +1608,25 @@ static struct w83781d_data *w83781d_update_device(struct device *dev) data->fan_div[1] |= (i >> 4) & 0x04; data->fan_div[2] |= (i >> 5) & 0x04; } - data->alarms = - w83781d_read_value(client, - W83781D_REG_ALARM1) + - (w83781d_read_value(client, W83781D_REG_ALARM2) << 8); if ((data->type == w83782d) || (data->type == w83627hf)) { - data->alarms |= - w83781d_read_value(client, - W83781D_REG_ALARM3) << 16; + data->alarms = w83781d_read_value(client, + W83782D_REG_ALARM1) + | (w83781d_read_value(client, + W83782D_REG_ALARM2) << 8) + | (w83781d_read_value(client, + W83782D_REG_ALARM3) << 16); + } else if (data->type == w83783s) { + data->alarms = w83781d_read_value(client, + W83782D_REG_ALARM1) + | (w83781d_read_value(client, + W83782D_REG_ALARM2) << 8); + } else { + /* No real-time status registers, fall back to + interrupt status registers */ + data->alarms = w83781d_read_value(client, + W83781D_REG_ALARM1) + | (w83781d_read_value(client, + W83781D_REG_ALARM2) << 8); } i = w83781d_read_value(client, W83781D_REG_BEEP_INTS2); data->beep_enable = i >> 7; |