[PATCH v8 1/2] hwmon: shtc1: add support for device tree bindings

[Chris Ruehl]

Add support for DTS bindings for the sensirion shtc1,shtw1 and shtc3.

Signed-off-by: Chris Ruehl <chris.ru...@gtsys.com.hk>
Reviewed-by: Guenter Roeck <li...@roeck-us.net>
---
 v8: no change

 drivers/hwmon/shtc1.c | 25 ++++++++++++++++++++++---
 1 file changed, 22 insertions(+), 3 deletions(-)

diff --git a/drivers/hwmon/shtc1.c b/drivers/hwmon/shtc1.c
index a0078ccede03..7993a5ff8768 100644
--- a/drivers/hwmon/shtc1.c
+++ b/drivers/hwmon/shtc1.c
@@ -14,6 +14,7 @@
 #include <linux/err.h>
 #include <linux/delay.h>
 #include <linux/platform_data/shtc1.h>
+#include <linux/of.h>
 
 /* commands (high precision mode) */
 static const unsigned char shtc1_cmd_measure_blocking_hpm[]    = { 0x7C, 0xA2 
};
@@ -196,6 +197,7 @@ static int shtc1_probe(struct i2c_client *client,
        enum shtcx_chips chip = id->driver_data;
        struct i2c_adapter *adap = client->adapter;
        struct device *dev = &client->dev;
+       struct device_node *np = dev->of_node;
 
        if (!i2c_check_functionality(adap, I2C_FUNC_I2C)) {
                dev_err(dev, "plain i2c transactions not supported\n");
@@ -233,8 +235,14 @@ static int shtc1_probe(struct i2c_client *client,
        data->client = client;
        data->chip = chip;
 
-       if (client->dev.platform_data)
-               data->setup = *(struct shtc1_platform_data *)dev->platform_data;
+       if (np) {
+               data->setup.blocking_io = of_property_read_bool(np, 
"sensirion,blocking-io");
+               data->setup.high_precision = !of_property_read_bool(np, 
"sensicon,low-precision");
+       } else {
+               if (client->dev.platform_data)
+                       data->setup = *(struct shtc1_platform_data 
*)dev->platform_data;
+       }
+
        shtc1_select_command(data);
        mutex_init(&data->update_lock);
 
@@ -257,8 +265,19 @@ static const struct i2c_device_id shtc1_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, shtc1_id);
 
+static const struct of_device_id shtc1_of_match[] = {
+       { .compatible = "sensirion,shtc1" },
+       { .compatible = "sensirion,shtw1" },
+       { .compatible = "sensirion,shtc3" },
+       { }
+};
+MODULE_DEVICE_TABLE(of, shtc1_of_match);
+
 static struct i2c_driver shtc1_i2c_driver = {
-       .driver.name  = "shtc1",
+       .driver = {
+               .name = "shtc1",
+               .of_match_table = shtc1_of_match,
+       },
        .probe        = shtc1_probe,
        .id_table     = shtc1_id,
 };
-- 
2.20.1