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Subject[PATCH] MFD/PCAP: ezx_pcap_setbits()
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Date
Provides an atomic set_bits functions, as needed by the pcap-regulator
driver.

Signed-off-by: Daniel Ribeiro <drwyrm@gmail.com>

---
drivers/mfd/ezx-pcap.c | 23 +++++++++++++++++++++++
include/linux/mfd/ezx-pcap.h | 1 +
2 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
index 732664f..86d3948 100644
--- a/drivers/mfd/ezx-pcap.c
+++ b/drivers/mfd/ezx-pcap.c
@@ -107,6 +107,29 @@ int ezx_pcap_read(struct pcap_chip *pcap, u8 reg_num, u32 *value)
}
EXPORT_SYMBOL_GPL(ezx_pcap_read);

+int ezx_pcap_set_bits(struct pcap_chip *pcap, u8 reg_num, u32 mask, u32 val)
+{
+ int ret;
+ u32 tmp = PCAP_REGISTER_READ_OP_BIT |
+ (reg_num << PCAP_REGISTER_ADDRESS_SHIFT);
+
+ mutex_lock(&pcap->io_mutex);
+ ret = ezx_pcap_putget(pcap, &tmp);
+ if (ret)
+ goto out_unlock;
+
+ tmp &= (PCAP_REGISTER_VALUE_MASK & ~mask);
+ tmp |= (val & mask) | PCAP_REGISTER_WRITE_OP_BIT |
+ (reg_num << PCAP_REGISTER_ADDRESS_SHIFT);
+
+ ret = ezx_pcap_putget(pcap, &tmp);
+out_unlock:
+ mutex_unlock(&pcap->io_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ezx_pcap_set_bits);
+
/* IRQ */
int irq_to_pcap(struct pcap_chip *pcap, int irq)
{
diff --git a/include/linux/mfd/ezx-pcap.h b/include/linux/mfd/ezx-pcap.h
index b15caac..dec82b0 100644
--- a/include/linux/mfd/ezx-pcap.h
+++ b/include/linux/mfd/ezx-pcap.h
@@ -25,6 +25,7 @@ struct pcap_chip;

int ezx_pcap_write(struct pcap_chip *, u8, u32);
int ezx_pcap_read(struct pcap_chip *, u8, u32 *);
+int ezx_pcap_set_bits(struct pcap_chip *, u8, u32, u32);
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 *);
--
tg: (e94c381..) pcap/set_bits (depends on: pcap/fix-irq-handler)
--
Daniel Ribeiro
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