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authorRoger Quadros <rogerq@ti.com>2014-05-18 22:44:35 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2014-05-18 23:25:56 -0700
commit3b36fbb01dc50f58e7803006f5a99683daf26c8c (patch)
treed523a06fd4a4ea9b5043e22c101fe853bb7075bb /include/linux/input
parente9d4718dcd53281c191cb5fccb53ce0246e10104 (diff)
Input: pixcir_i2c_ts - initialize interrupt mode and power mode
Introduce helper functions to configure power and interrupt registers. Default to IDLE mode on probe as device supports auto wakeup to ACVIE mode on detecting finger touch. Configure interrupt mode and polarity on start up. Power down on device closure or module removal. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'include/linux/input')
-rw-r--r--include/linux/input/pixcir_ts.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/include/linux/input/pixcir_ts.h b/include/linux/input/pixcir_ts.h
index 7163d91c0373..7942804464d3 100644
--- a/include/linux/input/pixcir_ts.h
+++ b/include/linux/input/pixcir_ts.h
@@ -1,6 +1,48 @@
#ifndef _PIXCIR_I2C_TS_H
#define _PIXCIR_I2C_TS_H
+/*
+ * Register map
+ */
+#define PIXCIR_REG_POWER_MODE 51
+#define PIXCIR_REG_INT_MODE 52
+
+/*
+ * Power modes:
+ * active: max scan speed
+ * idle: lower scan speed with automatic transition to active on touch
+ * halt: datasheet says sleep but this is more like halt as the chip
+ * clocks are cut and it can only be brought out of this mode
+ * using the RESET pin.
+ */
+enum pixcir_power_mode {
+ PIXCIR_POWER_ACTIVE,
+ PIXCIR_POWER_IDLE,
+ PIXCIR_POWER_HALT,
+};
+
+#define PIXCIR_POWER_MODE_MASK 0x03
+#define PIXCIR_POWER_ALLOW_IDLE (1UL << 2)
+
+/*
+ * Interrupt modes:
+ * periodical: interrupt is asserted periodicaly
+ * diff coordinates: interrupt is asserted when coordinates change
+ * level on touch: interrupt level asserted during touch
+ * pulse on touch: interrupt pulse asserted druing touch
+ *
+ */
+enum pixcir_int_mode {
+ PIXCIR_INT_PERIODICAL,
+ PIXCIR_INT_DIFF_COORD,
+ PIXCIR_INT_LEVEL_TOUCH,
+ PIXCIR_INT_PULSE_TOUCH,
+};
+
+#define PIXCIR_INT_MODE_MASK 0x03
+#define PIXCIR_INT_ENABLE (1UL << 3)
+#define PIXCIR_INT_POL_HIGH (1UL << 2)
+
struct pixcir_ts_platform_data {
int (*attb_read_val)(void);
int x_max;