From 47064d645bc55863c7887a7c96cde39c9a37ee5f Mon Sep 17 00:00:00 2001 From: Ben Hutchings Date: Fri, 17 Oct 2008 17:51:12 +0200 Subject: 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 Signed-off-by: Jean Delvare --- drivers/hwmon/lm87.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) (limited to 'drivers/hwmon/lm87.c') 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)) { -- cgit v1.2.3