2D sensors have several parameter which can be set in the platform data. This patch adds support for getting those values from devicetree.
Signed-off-by: Andrew Duggan <adug...@synaptics.com> --- .../bindings/input/rmi4/rmi_2d_sensor.txt | 54 +++++++++++ drivers/input/rmi4/rmi_2d_sensor.c | 103 +++++++++++++++++++++ drivers/input/rmi4/rmi_2d_sensor.h | 3 + drivers/input/rmi4/rmi_f11.c | 7 +- 4 files changed, 166 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/input/rmi4/rmi_2d_sensor.txt diff --git a/Documentation/devicetree/bindings/input/rmi4/rmi_2d_sensor.txt b/Documentation/devicetree/bindings/input/rmi4/rmi_2d_sensor.txt new file mode 100644 index 0000000..bbff31b --- /dev/null +++ b/Documentation/devicetree/bindings/input/rmi4/rmi_2d_sensor.txt @@ -0,0 +1,54 @@ +Synaptics RMI4 2D Sensor Device Binding + +The Synaptics RMI4 core is able to support RMI4 devices using differnet +transports and differnet functions. This file describes the device tree +bindings for devices which contain 2D sensors using Function 11 or +Function 12. Complete documentation for transports and other functions +can be found in: +Documentation/devicetree/bindings/input/rmi4. + +RMI4 Function 11 and Function 12 are for 2D touch position sensing. +Additional documentation for F11 can be found at: +http://www.synaptics.com/sites/default/files/511-000136-01-Rev-E-RMI4-Interfacing-Guide.pdf + +Optional Properties: +- syna,swap-axes: Swap X and Y positions when reporting (boolean). +- syna,flip-x: Reverse the direction of X (boolean). +- syna,flip-y: Reverse the direction of Y (boolean). +- syna,clip-x-low: Sets a minimum value for X. +- syna,clip-y-low: Sets a minimum value for Y. +- syna,clip-x-high: Sets a maximum value for X. +- syna,clip-y-high: Sets a maximum value for Y. +- syna,offset-x: Add an offset to X. +- syna,offset_y: Add an offset to Y. +- syna,delta-x-threshold: Set the minimum distance on the X axis required + to generate an interrupt in reduced reporting + mode. +- syna,delta-y-threshold: Set the minimum distance on the Y axis required + to generate an interrupt in reduced reporting + mode. +- syna,type-a: Report type A multitouch events. +- syna,sensor-type: Set the sensor type. 1 for touchscreen 2 for touchpad. +- syna,x-mm: The length in millimeters of the X axis. +- syna,y-mm: The length in millimeters of the Y axis. +- syna,disable-report-mask: Mask for disabling posiiton reporting. Used to + disable reporing absolute position data. +- syna,rezero-wait: Time in miliseconds to wait after issuing a rezero + command. + + +Example of a RMI4 I2C device with F11: +Example: + &i2c1 { + rmi-i2c-dev@2c { + compatible = "syna,rmi-i2c"; + + ... + + rmi-f11@11 { + reg = <0x11>; + syna,flip-y; + syna,sensor-type = <2>; + }; + }; + }; diff --git a/drivers/input/rmi4/rmi_2d_sensor.c b/drivers/input/rmi4/rmi_2d_sensor.c index e3c7b7f..427d325 100644 --- a/drivers/input/rmi4/rmi_2d_sensor.c +++ b/drivers/input/rmi4/rmi_2d_sensor.c @@ -218,3 +218,106 @@ int rmi_2d_sensor_configure_input(struct rmi_function *fn, return 0; } EXPORT_SYMBOL_GPL(rmi_2d_sensor_configure_input); + +#ifdef CONFIG_OF +int rmi_2d_sensor_of_probe(struct device *dev, + struct rmi_2d_sensor_platform_data *pdata) +{ + int retval; + + pdata->axis_align.swap_axes = of_property_read_bool(dev->of_node, + "syna,swap-axes"); + + pdata->axis_align.flip_x = of_property_read_bool(dev->of_node, + "syna,flip-x"); + + pdata->axis_align.flip_y = of_property_read_bool(dev->of_node, + "syna,flip-y"); + + retval = rmi_of_property_read_u16(dev, + &pdata->axis_align.clip_x_low, + "syna,clip-x-low", 1); + if (retval) + return retval; + + retval = rmi_of_property_read_u16(dev, + &pdata->axis_align.clip_y_low, + "syna,clip-y-low", 1); + if (retval) + return retval; + + retval = rmi_of_property_read_u16(dev, + &pdata->axis_align.clip_x_high, + "syna,clip-x-high", 1); + if (retval) + return retval; + + retval = rmi_of_property_read_u16(dev, + &pdata->axis_align.clip_y_high, + "syna,clip-y-high", 1); + if (retval) + return retval; + + retval = rmi_of_property_read_u16(dev, + &pdata->axis_align.offset_x, + "syna,offset-x", 1); + if (retval) + return retval; + + retval = rmi_of_property_read_u16(dev, + &pdata->axis_align.offset_y, + "syna,offset_y", 1); + if (retval) + return retval; + + retval = rmi_of_property_read_u8(dev, + &pdata->axis_align.delta_x_threshold, + "syna,delta-x-threshold", 1); + if (retval) + return retval; + + retval = rmi_of_property_read_u8(dev, + &pdata->axis_align.delta_y_threshold, + "syna,delta-y-threshold", 1); + if (retval) + return retval; + + retval = rmi_of_property_read_u32(dev, + (u32 *)&pdata->sensor_type, + "syna,sensor-type", 1); + if (retval) + return retval; + + retval = rmi_of_property_read_u32(dev, + (u32 *)&pdata->x_mm, + "syna,x-mm", 1); + if (retval) + return retval; + + retval = rmi_of_property_read_u32(dev, + (u32 *)&pdata->y_mm, + "syna,y-mm", 1); + if (retval) + return retval; + + retval = rmi_of_property_read_u32(dev, + (u32 *)&pdata->disable_report_mask, + "syna,disable-report-mask", 1); + if (retval) + return retval; + + retval = rmi_of_property_read_u16(dev, &pdata->rezero_wait, + "syna,rezero-wait", 1); + if (retval) + return retval; + + return 0; +} +#else +inline int rmi_2d_sensor_of_probe(struct device *dev, + struct rmi_2d_sensor_platform_data *pdata) +{ + return -ENODEV; +} +#endif +EXPORT_SYMBOL_GPL(rmi_2d_sensor_of_probe); diff --git a/drivers/input/rmi4/rmi_2d_sensor.h b/drivers/input/rmi4/rmi_2d_sensor.h index bc31351..0ee817e 100644 --- a/drivers/input/rmi4/rmi_2d_sensor.h +++ b/drivers/input/rmi4/rmi_2d_sensor.h @@ -70,6 +70,9 @@ struct rmi_2d_sensor { u8 y_mm; }; +int rmi_2d_sensor_of_probe(struct device *dev, + struct rmi_2d_sensor_platform_data *pdata); + void rmi_2d_sensor_abs_process(struct rmi_2d_sensor *sensor, struct rmi_2d_sensor_abs_object *obj, int slot); diff --git a/drivers/input/rmi4/rmi_f11.c b/drivers/input/rmi4/rmi_f11.c index 0d1e0e5..fa8e333 100644 --- a/drivers/input/rmi4/rmi_f11.c +++ b/drivers/input/rmi4/rmi_f11.c @@ -1078,8 +1078,13 @@ static int rmi_f11_initialize(struct rmi_function *fn) if (!f11) return -ENOMEM; - if (pdata->sensor_pdata) + if (fn->dev.of_node) { + rc = rmi_2d_sensor_of_probe(&fn->dev, &f11->sensor_pdata); + if (rc) + return rc; + } else if (pdata->sensor_pdata) { f11->sensor_pdata = *pdata->sensor_pdata; + } f11->rezero_wait_ms = f11->sensor_pdata.rezero_wait; -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
