Greetings,
pcf8574 tried to write an untested value to the chip, one
way to 'fix' this is simply force the value to byte range.
Who knows proper fix please?
Cheers,
Grant.
--- linux-2.6.12-rc1-mm3/drivers/i2c/chips/pcf8574.c 2005-03-23 06:34:26.000000000 +1100
+++ linux-2.6.12-rc1-mm3x/drivers/i2c/chips/pcf8574.c 2005-03-27 12:31:05.000000000 +1000
@@ -97,8 +97,12 @@
{
struct i2c_client *client = to_i2c_client(dev);
struct pcf8574_data *data = i2c_get_clientdata(client);
- data->write = simple_strtoul(buf, NULL, 10);
+ unsigned long val = simple_strtoul(buf, NULL, 10) & 0xff;
+
+ down(&data->update_lock);
+ data->write = val;
i2c_smbus_write_byte(client, data->write);
+ up(&data->update_lock);
return count;
}
