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    Subject[PATCH] MFD/PCAP: ezx_pcap_setbits()
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    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
    [unhandled content-type:application/pgp-signature]
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