From: "Patil, Rachna" <rachna@xxxxxx>
Current code has hard coded value written to
step enable bits. Now the bits are updated based
on how many steps are needed to be configured got
from platform data.
The user needs to take care not to exceed
the count more than 16. While using ADC and TSC
one should take care to set this parameter correctly.
Signed-off-by: Patil, Rachna <rachna@xxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
drivers/input/touchscreen/ti_am335x_tsc.c | 10 ++++++++--
include/linux/mfd/ti_am335x_tscadc.h | 1 -
2 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c
index 51e7b87..da652e0 100644
--- a/drivers/input/touchscreen/ti_am335x_tsc.c
+++ b/drivers/input/touchscreen/ti_am335x_tsc.c
@@ -39,6 +39,7 @@ struct titsc {
unsigned int irq;
unsigned int wires;
unsigned int x_plate_resistance;
+ unsigned int enable_bits;
bool pen_down;
int steps_to_configure;
};
@@ -57,6 +58,7 @@ static void titsc_writel(struct titsc *tsc, unsigned int reg,
static void titsc_step_config(struct titsc *ts_dev)
{
unsigned int config;
+ unsigned int stepenable = 0;
int i, total_steps;
/* Configure the Step registers */
@@ -128,7 +130,11 @@ static void titsc_step_config(struct titsc *ts_dev)
titsc_writel(ts_dev, REG_STEPDELAY(total_steps + 2),
STEPCONFIG_OPENDLY);
- titsc_writel(ts_dev, REG_SE, STPENB_STEPENB_TC);
+ for (i = 0; i <= (total_steps + 2); i++)
+ stepenable |= 1 << i;
+ ts_dev->enable_bits = stepenable;
+
+ titsc_writel(ts_dev, REG_SE, ts_dev->enable_bits);
}
static void titsc_read_coordinates(struct titsc *ts_dev,
@@ -250,7 +256,7 @@ static irqreturn_t titsc_irq(int irq, void *dev)
titsc_writel(ts_dev, REG_IRQSTATUS, irqclr);
- titsc_writel(ts_dev, REG_SE, STPENB_STEPENB_TC);
+ titsc_writel(ts_dev, REG_SE, ts_dev->enable_bits);
return IRQ_HANDLED;
}
diff --git a/include/linux/mfd/ti_am335x_tscadc.h b/include/linux/mfd/ti_am335x_tscadc.h
index c79ad5d..23e4f33 100644
--- a/include/linux/mfd/ti_am335x_tscadc.h
+++ b/include/linux/mfd/ti_am335x_tscadc.h
@@ -47,7 +47,6 @@
#define STEPENB_MASK (0x1FFFF << 0)
#define STEPENB(val) ((val) << 0)
#define STPENB_STEPENB STEPENB(0x1FFFF)
-#define STPENB_STEPENB_TC STEPENB(0x1FFF)
/* IRQ enable */
#define IRQENB_HW_PEN BIT(0)
--
1.7.10.4
--
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