On Tue, 21 Mar 2017, Sebastian Reichel wrote:
> CPCAP can sense if IRQ is currently set or not. This
> functionality is required for a few subdevices, such
> as the power button and usb phy modules.
>
> Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>
> Signed-off-by: Sebastian Reichel <sre@xxxxxxxxxx>
> ---
> Changes since PATCHv2:
> - Collect Acked-by/Tested-by
> - Fix typo in EXPORT_SYMBOL_GPL
> ---
> drivers/mfd/motorola-cpcap.c | 25 +++++++++++++++++++++++++
> include/linux/mfd/motorola-cpcap.h | 2 ++
> 2 files changed, 27 insertions(+)
>
> diff --git a/drivers/mfd/motorola-cpcap.c b/drivers/mfd/motorola-cpcap.c
> index 6aeada7d7ce5..a1e364b42e47 100644
> --- a/drivers/mfd/motorola-cpcap.c
> +++ b/drivers/mfd/motorola-cpcap.c
> @@ -32,6 +32,31 @@ struct cpcap_ddata {
> struct regmap *regmap;
> };
>
> +static int cpcap_sense_irq(struct regmap *regmap, int irq)
> +{
> + int reg = CPCAP_REG_INTS1 + (irq / 16) * 4;
> + int mask = 1 << (irq % 16);
Can you place all this bit-wise hoop jumping in macros please?
Also please use the BIT() macro.
> + int err, val;
> +
> + if (irq < 0 || irq > 64)
> + return -EINVAL;
What's wrong with IRQ 65?
I'm *guessing* there isn't one.
You can make this clearer by defining CPCAP_SENSE_IRQ_MAX.
> + err = regmap_read(regmap, reg, &val);
> + if (err)
> + return err;
> +
> + return !!(val & mask);
> +}
> +
> +int cpcap_sense_virq(struct regmap *regmap, int virq)
> +{
> + struct regmap_irq_chip_data *d = irq_get_chip_data(virq);
> + int base = regmap_irq_chip_get_base(d);
> +
> + return cpcap_sense_irq(regmap, virq - base);
> +}
> +EXPORT_SYMBOL_GPL(cpcap_sense_virq);
> +
> static int cpcap_check_revision(struct cpcap_ddata *cpcap)
> {
> u16 vendor, rev;
> diff --git a/include/linux/mfd/motorola-cpcap.h b/include/linux/mfd/motorola-cpcap.h
> index b4031c2b2214..7629e0d24d26 100644
> --- a/include/linux/mfd/motorola-cpcap.h
> +++ b/include/linux/mfd/motorola-cpcap.h
> @@ -290,3 +290,5 @@ static inline int cpcap_get_vendor(struct device *dev,
>
> return 0;
> }
> +
> +int cpcap_sense_virq(struct regmap *regmap, int virq);
extern?
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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