[PATCH 3/3] Input: tsc2007 - add a property "ti,report-resistance" to restore the old pressure reporting state if needed.
From: H. Nikolaus Schaller
Date: Mon Feb 20 2017 - 11:57:11 EST
Signed-off-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt | 2 ++
drivers/input/touchscreen/tsc2007.h | 1 +
drivers/input/touchscreen/tsc2007_core.c | 6 +++++-
3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt b/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt
index ec365e1..9b686af 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/tsc2007.txt
@@ -14,6 +14,8 @@ Optional properties:
- interrupts: (gpio) interrupt to which the chip is connected
(see interrupt binding[0]).
- ti,max-rt: maximum pressure.
+- ti,report-resistance: report resistance (no pressure = max_rt) instead
+ of pressure (no pressure = 0).
- ti,fuzzx: specifies the absolute input fuzz x value.
If set, it will permit noise in the data up to +- the value given to the fuzz
parameter, that is used to filter noise from the event stream.
diff --git a/drivers/input/touchscreen/tsc2007.h b/drivers/input/touchscreen/tsc2007.h
index 474bd29..81baabb 100644
--- a/drivers/input/touchscreen/tsc2007.h
+++ b/drivers/input/touchscreen/tsc2007.h
@@ -66,6 +66,7 @@ struct tsc2007 {
u16 model;
u16 x_plate_ohms;
+ bool report_resistance;
u16 max_rt;
unsigned long poll_period; /* in jiffies */
int fuzzx;
diff --git a/drivers/input/touchscreen/tsc2007_core.c b/drivers/input/touchscreen/tsc2007_core.c
index fc73849..984710f 100644
--- a/drivers/input/touchscreen/tsc2007_core.c
+++ b/drivers/input/touchscreen/tsc2007_core.c
@@ -141,7 +141,8 @@ static irqreturn_t tsc2007_soft_irq(int irq, void *handle)
"DOWN point(%4d,%4d), resistance (%4u)\n",
tc.x, tc.y, rt);
- rt = ts->max_rt - rt;
+ if (!ts->report_resistance)
+ rt = ts->max_rt - rt;
input_report_key(input, BTN_TOUCH, 1);
input_report_abs(input, ABS_X, tc.x);
@@ -248,6 +249,9 @@ static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts)
else
ts->max_rt = MAX_12BIT;
+ ts->report_resistance =
+ of_property_read_bool(np, "ti,report-resistance");
+
if (!of_property_read_u32(np, "ti,fuzzx", &val32))
ts->fuzzx = val32;
--
2.7.3