diff options
| author | Ben Hutchings <bhutchings@solarflare.com> | 2008-10-17 17:51:12 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@mahadeva.delvare> | 2008-10-17 17:51:12 +0200 |
| commit | 47064d645bc55863c7887a7c96cde39c9a37ee5f (patch) | |
| tree | 812e5badc94040e6001d3ca76bce97a3906caa60 /drivers/hwmon/lm87.c | |
| parent | hwmon: (lm87) Restore original configuration register on removal (diff) | |
| download | linux-47064d645bc55863c7887a7c96cde39c9a37ee5f.tar.xz linux-47064d645bc55863c7887a7c96cde39c9a37ee5f.zip | |
hwmon: (lm87) Add support for configuration through platform_data
The lm87 driver normally assumes that firmware configured the chip
correctly. Since this is not always the case, alllow platform code to
set the channel register value via platform_data. All other
configuration registers can be changed after driver initialisation.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon/lm87.c')
| -rw-r--r-- | drivers/hwmon/lm87.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c index fa0e3794d9a4..2e4a3cea95f7 100644 --- a/drivers/hwmon/lm87.c +++ b/drivers/hwmon/lm87.c @@ -21,11 +21,10 @@ * http://www.national.com/pf/LM/LM87.html * * Some functions share pins, so not all functions are available at the same - * time. Which are depends on the hardware setup. This driver assumes that - * the BIOS configured the chip correctly. In that respect, it differs from - * the original driver (from lm_sensors for Linux 2.4), which would force the - * LM87 to an arbitrary, compile-time chosen mode, regardless of the actual - * chipset wiring. + * time. Which are depends on the hardware setup. This driver normally + * assumes that firmware configured the chip correctly. Where this is not + * the case, platform code must set the I2C client's platform_data to point + * to a u8 value to be written to the channel register. * For reference, here is the list of exclusive functions: * - in0+in5 (default) or temp3 * - fan1 (default) or in6 @@ -843,7 +842,13 @@ static void lm87_init_client(struct i2c_client *client) { struct lm87_data *data = i2c_get_clientdata(client); - data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); + if (client->dev.platform_data) { + data->channel = *(u8 *)client->dev.platform_data; + lm87_write_value(client, + LM87_REG_CHANNEL_MODE, data->channel); + } else { + data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE); + } data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F; if (!(data->config & 0x01)) { |