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Commit e9a22635 authored by Daniel Ribeiro's avatar Daniel Ribeiro Committed by Samuel Ortiz
Browse files

mfd: add ezx_pcap_setbits 



Provides an atomic set_bits functions, as needed by the pcap-regulator
driver.

Signed-off-by: default avatarDaniel Ribeiro <drwyrm@gmail.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent b1148fd4

drivers/mfd/ezx-pcap.c

+23 −0
Original line number Diff line number Diff line
@@ -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)

{

include/linux/mfd/ezx-pcap.h

+1 −0
Original line number Diff line number Diff line
@@ -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 *);