[PATCH v2 1/2] hwmon: shtc1: add support for device tree bindings

Chris Ruehl
2020-07-05T03:47:50Z

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

Signed-off-by: Chris Ruehl <chris.ruehl@gtsys.com.hk>
---
drivers/hwmon/shtc1.c | 22 ++++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/hwmon/shtc1.c b/drivers/hwmon/shtc1.c
index a0078ccede03..61e9275eb666 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 +235,13 @@ static int shtc1_probe(struct i2c_client *client,
data->client = client;
data->chip = chip;

- if (client->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 +264,19 @@ 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