drivers/misc/lis3lv02d: add generic DT matching code

Adds logic to parse lis3 properties from a device tree node and store them
in a freshly allocated lis3lv02d_platform_data.

Note that the actual match tables are left out here.  This part should
happen in the drivers that bind to the individual busses (SPI/I2C/PCI).

Also adds some DT bindinds documentation.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Cc: Rob Herring <robherring2@gmail.com>
Cc: "AnilKumar, Chimata" <anilkumar@ti.com>
Reviewed-by: Éric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 76 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/misc/lis302.txt b/Documentation/devicetree/bindings/misc/lis302.txt
new file mode 100644
index 000000000000..e18af9d19793
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/lis302.txt
@@ -0,0 +1,76 @@
+LIS302 accelerometer devicetree bindings
+
+This device is matched via its bus drivers, and has a number of properties
+that apply in on the generic device (independent from the bus).
+
+
+Required properties for the SPI bindings:
+ - compatible:          should be set to "st,lis3lv02d_spi"
+ - reg:                 the chipselect index
+ - spi-max-frequency:   maximal bus speed, should be set to 1000000 unless
+                        constrained by external circuitry
+ - interrupts:          the interrupt generated by the device
+
+
+Optional properties for all bus drivers:
+
+ - st,click-single-{x,y,z}:     if present, tells the device to issue an
+                                interrupt on single click events on the
+                                x/y/z axis.
+ - st,click-double-{x,y,z}:     if present, tells the device to issue an
+                                interrupt on double click events on the
+                                x/y/z axis.
+ - st,click-thresh-{x,y,z}:     set the x/y/z axis threshold
+ - st,click-click-time-limit:   click time limit, from 0 to 127.5msec
+                                with step of 0.5 msec
+ - st,click-latency:            click latency, from 0 to 255 msec with
+                                step of 1 msec.
+ - st,click-window:             click window, from 0 to 255 msec with
+                                step of 1 msec.
+ - st,irq{1,2}-disable:         disable IRQ 1/2
+ - st,irq{1,2}-ff-wu-1:         raise IRQ 1/2 on FF_WU_1 condition
+ - st,irq{1,2}-ff-wu-2:         raise IRQ 1/2 on FF_WU_2 condition
+ - st,irq{1,2}-data-ready:      raise IRQ 1/2 on data ready contition
+ - st,irq{1,2}-click:           raise IRQ 1/2 on click condition
+ - st,irq-open-drain:           consider IRQ lines open-drain
+ - st,irq-active-low:           make IRQ lines active low
+ - st,wu-duration-1:            duration register for Free-Fall/Wake-Up
+                                interrupt 1
+ - st,wu-duration-2:            duration register for Free-Fall/Wake-Up
+                                interrupt 2
+ - st,wakeup-{x,y,z}-{lo,hi}:   set wakeup condition on x/y/z axis for
+                                upper/lower limit
+ - st,highpass-cutoff-hz=:      1, 2, 4 or 8 for 1Hz, 2Hz, 4Hz or 8Hz of
+                                highpass cut-off frequency
+ - st,hipass{1,2}-disable:      disable highpass 1/2.
+ - st,default-rate=:            set the default rate
+ - st,axis-{x,y,z}=:            set the axis to map to the three coordinates
+ - st,{min,max}-limit-{x,y,z}   set the min/max limits for x/y/z axis
+                                (used by self-test)
+
+
+Example for a SPI device node:
+
+        lis302@0 {
+                compatible = "st,lis302dl-spi";
+                reg = <0>;
+                spi-max-frequency = <1000000>;
+                interrupt-parent = <&gpio>;
+                interrupts = <104 0>;
+
+                st,click-single-x;
+                st,click-single-y;
+                st,click-single-z;
+                st,click-thresh-x = <10>;
+                st,click-thresh-y = <10>;
+                st,click-thresh-z = <10>;
+                st,irq1-click;
+                st,irq2-click;
+                st,wakeup-x-lo;
+                st,wakeup-x-hi;
+                st,wakeup-y-lo;
+                st,wakeup-y-hi;
+                st,wakeup-z-lo;
+                st,wakeup-z-hi;
+        };
+