Patch "mfd: ti_am335x_tscadc: Fix TSC operation after ADC continouous mode" has been added to the 3.14-stable tree

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This is a note to let you know that I've just added the patch titled

    mfd: ti_am335x_tscadc: Fix TSC operation after ADC continouous mode

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mfd-ti_am335x_tscadc-fix-tsc-operation-after-adc-continouous-mode.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 6ac734d2242949f41eb1346ca0fd4ed010c937aa Mon Sep 17 00:00:00 2001
From: Vignesh R <vigneshr@xxxxxx>
Date: Mon, 1 Sep 2014 12:01:06 +0530
Subject: mfd: ti_am335x_tscadc: Fix TSC operation after ADC continouous mode

From: Vignesh R <vigneshr@xxxxxx>

commit 6ac734d2242949f41eb1346ca0fd4ed010c937aa upstream.

After enabling and disabling ADC continuous mode via sysfs, ts_print_raw
fails to return any data. This is because when ADC is configured for
continuous mode, it disables touch screen steps.These steps are not
re-enabled when ADC continuous mode is disabled. Therefore existing values
of REG_SE needs to be cached before enabling continuous mode and
disabling touch screen steps and enabling ADC steps. The cached value
are to be restored to REG_SE once ADC is disabled.

Fixes: 7ca6740cd1cd ("mfd: input: iio: ti_amm335x: Rework TSC/ADC synchronization")

Signed-off-by: Vignesh R <vigneshr@xxxxxx>
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/mfd/ti_am335x_tscadc.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/mfd/ti_am335x_tscadc.c
+++ b/drivers/mfd/ti_am335x_tscadc.c
@@ -54,7 +54,7 @@ void am335x_tsc_se_set_cache(struct ti_t
 	unsigned long flags;
 
 	spin_lock_irqsave(&tsadc->reg_lock, flags);
-	tsadc->reg_se_cache = val;
+	tsadc->reg_se_cache |= val;
 	if (tsadc->adc_waiting)
 		wake_up(&tsadc->reg_se_wait);
 	else if (!tsadc->adc_in_use)
@@ -97,6 +97,7 @@ static void am335x_tscadc_need_adc(struc
 void am335x_tsc_se_set_once(struct ti_tscadc_dev *tsadc, u32 val)
 {
 	spin_lock_irq(&tsadc->reg_lock);
+	tsadc->reg_se_cache |= val;
 	am335x_tscadc_need_adc(tsadc);
 
 	tscadc_writel(tsadc, REG_SE, val);


Patches currently in stable-queue which might be from vigneshr@xxxxxx are

queue-3.14/mfd-ti_am335x_tscadc-fix-tsc-operation-after-adc-continouous-mode.patch
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