This patchset adds support for ltrf216a Ambient Light Sensor
and documents the DT bindings for the same.
Changes in v8
- Add caching mechanism to restore register state after h/w resume.
- Add callback functions and disable locking in regmap config.
- Update mutex comment as per it's current scope in the driver.
- Add Shreeya as author of the driver.
- Make some minor cleanups.
Changes in v7
- Add regmap support.
- Fix runtime power management implementation.
- Fix the ordering of devm and non-devm functions.
- Use DEFINE_RUNTIME_DEV_PM_OPS macro
- Fix the error reported by kernel test robot for bindings.
Changes in v6
- Fix some errors reported by kernel test robot.
- Add protocol details for the datasheet link.
- Remove useless assignments.
- Add unit details for read data delay macro.
- Use pm_sleep_ptr().
Changes in v5
- Add power management support.
- Add reset functionality.
- Use readx_poll_timeout() to get data.
- Cleanup some of the redundant code.
- Update int_time_fac after I2C write is successful.
- Rename mutex to lock.
- Use Reverse Xmas tree pattern for all variable definitions.
- Improve error handling messages and add error codes.
- Add one more MODULE_AUTHOR.
- Remove cleardata which was reading data for infrared light.
- Remove patch for deprecated vendor prefix [PATCH v4 3/3].
- Remove deprecated string from DT binding document.
Changes in v4
- Add more descriptive comment for mutex lock
- Fix mutex locking in read_raw()
- Use i2c_smbus_read_i2c_block_data()
Changes in v3
- Use u16 instead of u8 for int_time_fac
- Reorder headers in ltrf216a.c file
- Remove int_time_mapping table and use int_time_available
- Fix indentation in the bindings file.
Changes in v2
- Add support for 25ms and 50ms integration time.
- Rename some of the macros as per names given in datasheet
- Add a comment for the mutex lock
- Use read_avail callback instead of attributes and set the
appropriate _available bit.
- Use FIELD_PREP() at appropriate places.
- Add a constant lookup table for integration time and reg val
- Use BIT() macro for magic numbers.
- Improve error handling at few places.
- Use get_unaligned_le24() and div_u64()
- Use probe_new() callback and devm functions
- Return errors in probe using dev_err_probe()
- Use DEFINE_SIMPLE_DEV_PM_OPS()
- Correct the formula for lux to use 0.45 instead of 0.8
- Add interrupt and power supply property in DT bindings
- Add vendor prefix name as per the alphabetical order.
Shreeya Patel (2):
dt-bindings: Document ltrf216a light sensor bindings
iio: light: Add support for ltrf216a sensor
.../bindings/iio/light/liteon,ltrf216a.yaml | 49 ++
drivers/iio/light/Kconfig | 11 +
drivers/iio/light/Makefile | 1 +
drivers/iio/light/ltrf216a.c | 522 ++++++++++++++++++
4 files changed, 583 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/light/liteon,ltrf216a.yaml
create mode 100644 drivers/iio/light/ltrf216a.c
--
2.30.2
Add devicetree bindings for ltrf216a ambient light sensor.
Signed-off-by: Shreeya Patel <[email protected]>
---
Changes in v7
- Fix the error reported by kernel test robot.
Changes in v5
- Remove deprecated string 'ltr' from the bindings.
Changes in v3
- Fix indentation in the example section
Changes in v2
- Take over the maintainership for the bindings
- Add interrupt and power supply property in DT bindings
.../bindings/iio/light/liteon,ltrf216a.yaml | 49 +++++++++++++++++++
1 file changed, 49 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/light/liteon,ltrf216a.yaml
diff --git a/Documentation/devicetree/bindings/iio/light/liteon,ltrf216a.yaml b/Documentation/devicetree/bindings/iio/light/liteon,ltrf216a.yaml
new file mode 100644
index 000000000000..7de1b0e721ca
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/light/liteon,ltrf216a.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/light/liteon,ltrf216a.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LTRF216A Ambient Light Sensor
+
+maintainers:
+ - Shreeya Patel <[email protected]>
+
+description:
+ Ambient light sensing with an i2c interface.
+
+properties:
+ compatible:
+ const: liteon,ltrf216a
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ vdd-supply:
+ description: Regulator that provides power to the sensor.
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ light-sensor@53 {
+ compatible = "liteon,ltrf216a";
+ reg = <0x53>;
+ vdd-supply = <&vdd_regulator>;
+ interrupt-parent = <&gpio0>;
+ interrupts = <5 IRQ_TYPE_LEVEL_LOW>;
+ };
+ };
--
2.30.2