* [PATCH v7 1/2] hwmon: shtc1: add support for device tree bindings
2020-08-07 7:31 [PATCH v7 0/2] shtc1: add support for device tree bindings Chris Ruehl
@ 2020-08-07 7:31 ` Chris Ruehl
2020-08-07 7:31 ` [PATCH v7 2/2] devicetree: hwmon: shtc1: add sensirion,shtc1.yaml Chris Ruehl
1 sibling, 0 replies; 4+ messages in thread
From: Chris Ruehl @ 2020-08-07 7:31 UTC (permalink / raw)
To: Chris Ruehl
Cc: Jack Lo, devicetree, Guenter Roeck, Jean Delvare, linux-hwmon,
linux-kernel
Add support for DTS bindings for the sensirion shtc1,shtw1 and shtc3.
Signed-off-by: Chris Ruehl <chris.ruehl@gtsys.com.hk>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
---
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
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* [PATCH v7 2/2] devicetree: hwmon: shtc1: add sensirion,shtc1.yaml
2020-08-07 7:31 [PATCH v7 0/2] shtc1: add support for device tree bindings Chris Ruehl
2020-08-07 7:31 ` [PATCH v7 1/2] hwmon: " Chris Ruehl
@ 2020-08-07 7:31 ` Chris Ruehl
2020-08-12 16:53 ` Rob Herring
1 sibling, 1 reply; 4+ messages in thread
From: Chris Ruehl @ 2020-08-07 7:31 UTC (permalink / raw)
To: Chris Ruehl
Cc: Jack Lo, devicetree, Jean Delvare, Guenter Roeck, Rob Herring,
linux-hwmon, linux-kernel
Add documentation for the newly added DTS support in the shtc1 driver.
To align with the drivers logic to have high precision by default
a boolean sensirion,low_precision is used to switch to low precision.
Signed-off-by: Chris Ruehl <chris.ruehl@gtsys.com.hk>
---
.../bindings/hwmon/sensirion,shtc1.yaml | 59 +++++++++++++++++++
1 file changed, 59 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/sensirion,shtc1.yaml
diff --git a/Documentation/devicetree/bindings/hwmon/sensirion,shtc1.yaml b/Documentation/devicetree/bindings/hwmon/sensirion,shtc1.yaml
new file mode 100644
index 000000000000..41cc59b0b0e3
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/sensirion,shtc1.yaml
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/sensirion,shtc1.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sensirion SHTC1 Humidity and Temperature Sensor IC
+
+maintainers:
+ - chris.ruehl@gtsys.com.hk
+
+description: |
+ The SHTC1, SHTW1 and SHTC3 are digital humidity and temperature sensor
+ designed especially for battery-driven high-volume consumer electronics
+ applications.
+ For further information refere to Documentation/hwmon/shtc1.rst
+
+ This binding document describes the binding for the hardware monitor
+ portion of the driver.
+
+properties:
+ compatible:
+ enum:
+ - sensirion,shtc1
+ - sensirion,shtw1
+ - sensirion,shtc3
+
+ reg:
+ const: 0x70
+
+ sensirion,blocking-io:
+ $ref: /schemas/types.yaml#definitions/flag
+ description:
+ If set, the driver hold the i2c bus until measurement is finished.
+
+ sensirion,low-precision:
+ $ref: /schemas/types.yaml#definitions/flag
+ description:
+ If set, the sensor aquire data with low precision (not recommended).
+ The driver aquire data with high precision by default.
+
+required:
+ - compatible
+ - reg
+
+examples:
+ - |
+ i2c1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ clock-frequency = <400000>;
+
+ shtc3@70 {
+ compatible = "sensirion,shtc3";
+ reg = <0x70>;
+ sensirion,blocking-io;
+ };
+ };
+...
--
2.20.1
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