diff options
| author | Daniel Ribeiro <drwyrm@gmail.com> | 2009-06-23 12:33:10 -0300 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2009-09-17 09:46:46 +0200 |
| commit | ecd78cbdb989fd593bf4fd69cdb572200e70a553 (patch) | |
| tree | f09604e607e78fea4c42cb2a7ce10e3f627cf87e /drivers/mfd/ezx-pcap.c | |
| parent | 9f7b07d6cc3ed14783c9427a5b2a69794eb2de64 (diff) | |
| download | lwn-ecd78cbdb989fd593bf4fd69cdb572200e70a553.tar.gz lwn-ecd78cbdb989fd593bf4fd69cdb572200e70a553.zip | |
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>
Diffstat (limited to 'drivers/mfd/ezx-pcap.c')
| -rw-r--r-- | drivers/mfd/ezx-pcap.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c index de7e63706abb..c5122024f05a 100644 --- a/drivers/mfd/ezx-pcap.c +++ b/drivers/mfd/ezx-pcap.c @@ -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); } |