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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2009-05-27 06:22:58 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2009-05-27 06:25:05 -0700
commitcbf806dd9302f3ff27ba496dae474b9da6b58873 (patch)
tree083051bf123c7bc52bcdc53918a82fb1ca470067 /drivers/mfd/ucb1400_core.c
parent10494dce0b43ed3212abde64bf759705ee3c56ef (diff)
Input: ucb1400 - move static function from header into core
it's a little too large for static line. The ts is currently the only mainline user but Marek Vasut claims that there is a battery driver in an ARM tree which also needs this function. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/mfd/ucb1400_core.c')
-rw-r--r--drivers/mfd/ucb1400_core.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/mfd/ucb1400_core.c b/drivers/mfd/ucb1400_core.c
index 178159e264ce..78c2135c5de6 100644
--- a/drivers/mfd/ucb1400_core.c
+++ b/drivers/mfd/ucb1400_core.c
@@ -23,6 +23,26 @@
#include <linux/module.h>
#include <linux/ucb1400.h>
+unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel,
+ int adcsync)
+{
+ unsigned int val;
+
+ if (adcsync)
+ adc_channel |= UCB_ADC_SYNC_ENA;
+
+ ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel);
+ ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel |
+ UCB_ADC_START);
+
+ while (!((val = ucb1400_reg_read(ac97, UCB_ADC_DATA))
+ & UCB_ADC_DAT_VALID))
+ schedule_timeout_uninterruptible(1);
+
+ return val & UCB_ADC_DAT_MASK;
+}
+EXPORT_SYMBOL_GPL(ucb1400_adc_read);
+
static int ucb1400_core_probe(struct device *dev)
{
int err;