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hwmon: (lm87) Add support for configuration through platform_data

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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>
This commit is contained in:
Ben Hutchings
2008-10-17 17:51:12 +02:00
committed by Jean Delvare
parent d2cac802fe
commit 47064d645b
2 changed files with 15 additions and 11 deletions
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17
drivers/hwmon/lm87.c
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@@ -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)) {