redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

mfd: ti_am335x_tscadc: Fix TSC resume 

In the resume path, the ADC invokes am335x_tsc_se_set_cache() with 0 as
the steps argument if continous mode is not in use. This in turn disables
all steps and so the TSC is not working until one ADC sampling is
performed.

This patch fixes it by writing the current cached mask instead of the
passed steps.

Fixes: 7ca6740cd1 ("mfd: input: iio: ti_amm335x: Rework TSC/ADCA
synchronization")
Cc: stable@vger.kernel.org # v3.13+
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
hifive-unleashed-5.1
Sebastian Andrzej Siewior 2014-09-08 15:28:42 +02:00 committed by Lee Jones
parent 0b496b4c95
commit 6a71f38dd8
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/mfd/ti_am335x_tscadc.c
View File

@ -57,7 +57,7 @@ void am335x_tsc_se_set_cache(struct ti_tscadc_dev *tsadc, u32 val)
if (tsadc->adc_waiting)
wake_up(&tsadc->reg_se_wait);
else if (!tsadc->adc_in_use)
tscadc_writel(tsadc, REG_SE, val);
tscadc_writel(tsadc, REG_SE, tsadc->reg_se_cache);
spin_unlock_irqrestore(&tsadc->reg_lock, flags);
}