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hwmon: (lm87) Allow channel data to be set from dts file

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Currently there is no method for setting the channel
value from the DTS file. When, the driver uses a dts
file to initialize the driver platform_data is not set.
As a result channel variable may not be set correctly.

Without the channel variable set correctly, some of the
sensors will not be initialized correctly. For example
temp3 sensor sysfs entries.

This implements the schema agreed with the device tree
binding document.

Signed-off-by: Mahoda Ratnayaka <[email protected]>
Tested-by: Chris Packham <[email protected]>
Signed-off-by: Chris Packham <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
This commit is contained in:
Mahoda Ratnayaka 2017-03-31 12:01:00 +13:00 • committed by Guenter Roeck
commit 67043d1853
1 changed files with 21 additions and 2 deletions
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21
drivers/hwmon/lm87.c
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@ -66,6 +66,7 @@
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/regulator/consumer.h>
/*
* Addresses to scan
@ -855,8 +856,26 @@ static int lm87_init_client(struct i2c_client *client)
{
struct lm87_data *data = i2c_get_clientdata(client);
int rc;
struct device_node *of_node = client->dev.of_node;
u8 val = 0;
struct regulator *vcc = NULL;
if (dev_get_platdata(&client->dev)) {
if (of_node) {
if (of_property_read_bool(of_node, "has-temp3"))
val |= CHAN_TEMP3;
if (of_property_read_bool(of_node, "has-in6"))
val |= CHAN_NO_FAN(0);
if (of_property_read_bool(of_node, "has-in7"))
val |= CHAN_NO_FAN(1);
vcc = devm_regulator_get_optional(&client->dev, "vcc");
if (!IS_ERR(vcc)) {
if (regulator_get_voltage(vcc) == 5000000)
val |= CHAN_VCC_5V;
}
data->channel = val;
lm87_write_value(client,
LM87_REG_CHANNEL_MODE, data->channel);
} else if (dev_get_platdata(&client->dev)) {
data->channel = *(u8 *)dev_get_platdata(&client->dev);
lm87_write_value(client,
LM87_REG_CHANNEL_MODE, data->channel);