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>
diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
index de7e637..c512202 100644
--- a/drivers/mfd/ezx-pcap.c
+++ b/drivers/mfd/ezx-pcap.c
@@ -195,6 +195,19 @@
}
/* 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 @@
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);
}