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mfd: add set_ts_bits for pcap 

Some TS controller bits are on the same register as the ADC control, save
TS specific bits and export a set_ts_bits function so the TS driver can set
it with the adc_mutex lock held.

Signed-off-by: Daniel Ribeiro <drwyrm@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Daniel Ribeiro 2009-06-23 12:33:10 -03:00 committed by Samuel Ortiz
parent 9f7b07d6cc
commit ecd78cbdb9
2 changed files with 19 additions and 4 deletions
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22
drivers/mfd/ezx-pcap.c
View File

@ -195,6 +195,19 @@ static void pcap_irq_handler(unsigned int irq, struct irq_desc *desc)
}
/* ADC */
void pcap_set_ts_bits(struct pcap_chip *pcap, u32 bits)
{
u32 tmp;
mutex_lock(&pcap->adc_mutex);
ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp);
tmp &= ~(PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR);
tmp |= bits & (PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR);
ezx_pcap_write(pcap, PCAP_REG_ADC, tmp);
mutex_unlock(&pcap->adc_mutex);
}
EXPORT_SYMBOL_GPL(pcap_set_ts_bits);
static void pcap_disable_adc(struct pcap_chip *pcap)
{
u32 tmp;
@ -217,15 +230,16 @@ static void pcap_adc_trigger(struct pcap_chip *pcap)
mutex_unlock(&pcap->adc_mutex);
return;
}
mutex_unlock(&pcap->adc_mutex);
/* start conversion on requested bank */
tmp = pcap->adc_queue[head]->flags | PCAP_ADC_ADEN;
/* start conversion on requested bank, save TS_M bits */
ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp);
tmp &= (PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR);
tmp |= pcap->adc_queue[head]->flags | PCAP_ADC_ADEN;
if (pcap->adc_queue[head]->bank == PCAP_ADC_BANK_1)
tmp |= PCAP_ADC_AD_SEL1;
ezx_pcap_write(pcap, PCAP_REG_ADC, tmp);
mutex_unlock(&pcap->adc_mutex);
ezx_pcap_write(pcap, PCAP_REG_ADR, PCAP_ADR_ASC);
}

1
include/linux/mfd/ezx-pcap.h
View File

@ -29,6 +29,7 @@ int pcap_to_irq(struct pcap_chip *, int);
int irq_to_pcap(struct pcap_chip *, int);
int pcap_adc_async(struct pcap_chip *, u8, u32, u8[], void *, void *);
int pcap_adc_sync(struct pcap_chip *, u8, u32, u8[], u16[]);
void pcap_set_ts_bits(struct pcap_chip *, u32);
#define PCAP_SECOND_PORT 1
#define PCAP_CS_AH 2