Hi,
On 18-03-15 11:37, Maxime Ripard wrote:
On Thu, Mar 12, 2015 at 04:45:50PM +0100, Jens Thiele wrote:
This commit introduces two new optional device-tree properties:
"tp-sensitive-adjust": adjust sensitivity of pen down detection
"filter-type": select median and averaging filter
The previous fixed defaults, didn't work well for the Olimex
A13-LCD10TS (I have).
Signed-off-by: Jens Thiele <karme@xxxxxxxx>
---
.../devicetree/bindings/input/touchscreen/sun4i.txt | 19 +++++++++++++++++--
drivers/input/touchscreen/sun4i-ts.c | 17 +++++++++++++----
2 files changed, 30 insertions(+), 6 deletions(-)
diff --git a/Documentation/devicetree/bindings/input/touchscreen/sun4i.txt b/Documentation/devicetree/bindings/input/touchscreen/sun4i.txt
index 433332d..c93edfa 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/sun4i.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/sun4i.txt
@@ -8,8 +8,20 @@ Required properties:
- #thermal-sensor-cells: shall be 0
Optional properties:
- - allwinner,ts-attached: boolean indicating that an actual touchscreen is
- attached to the controller
+ - allwinner,ts-attached : boolean indicating that an actual touchscreen
+ is attached to the controller
+ - allwinner,tp-sensitive-adjust : integer (4 bits)
+ adjust sensitivity of pen down detection
+ between 0 (least sensitive) and 15
+ (defaults to 15)
+ - allwinner,filter-type : integer (2 bits)
+ select median and averaging filter
+ samples used for median / averaging filter
+ 0: 4/2
+ 1: 5/3
+ 2: 8/4
+ 3: 16/8
+ (defaults to 1)
You shouldn't rely on any bits length in your binding.
And this looks really more of a configuration option, and would be
better exposed through sysfs.
Erm, no, this is to adjust for properties of the touchscreen, so this is
hardware configuration, and as such definitely belongs in the dts.
Regards,
Hans
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