Hi Bjorn,
On 18/06/15 07:47, Bjorn Andersson wrote:
> Implement irq_chip->irq_get_irqchip_state to make it possible for PMIC
> block drivers to access the IRQ real time status bits. The status bits
> are used for various kinds of input signals, e.g. GPIO.
>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx>
> ---
>
> This patch can be picked up independently of the rest of the series.
>
> drivers/mfd/pm8921-core.c | 43 +++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 43 insertions(+)
>
> diff --git a/drivers/mfd/pm8921-core.c b/drivers/mfd/pm8921-core.c
> index 5a92646a2ccb..5f81ba0c50f5 100644
> --- a/drivers/mfd/pm8921-core.c
> +++ b/drivers/mfd/pm8921-core.c
> @@ -236,11 +236,54 @@ static int pm8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
> return pm8xxx_config_irq(chip, block, config);
> }
>
> +static int pm8xxx_irq_get_irqchip_state(struct irq_data *d,
> + enum irqchip_irq_state which,
> + bool *state)
> +{
> + struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
> + unsigned int pmirq = irqd_to_hwirq(d);
> + unsigned int bits;
> + int irq_bit;
> + u8 block;
> + int rc;
> +
> + if (!chip) {
> + pr_err("Failed to resolve pm_irq_chip\n");
> + return -EINVAL;
> + }
Why do you need to check this? Is there any code path that could
actually trigger this?
> +
> + if (which != IRQCHIP_STATE_LINE_LEVEL)
> + return -EINVAL;
> +
> + block = pmirq / 8;
> + irq_bit = pmirq % 8;
> +
> + spin_lock(&chip->pm_irq_lock);
> + rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, block);
> + if (rc) {
> + pr_err("Failed Selecting Block %d rc=%d\n", block, rc);
> + goto bail;
> + }
> +
> + rc = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_RT_STATUS, &bits);
> + if (rc) {
> + pr_err("Failed Reading Status rc=%d\n", rc);
> + goto bail;
> + }
> +
> + *state = !!(bits & BIT(irq_bit));
> +bail:
> + spin_unlock(&chip->pm_irq_lock);
> +
> + return rc ? rc : 0;
I think you can just have "return rc;" here.
> +}
> +
> static struct irq_chip pm8xxx_irq_chip = {
> .name = "pm8xxx",
> .irq_mask_ack = pm8xxx_irq_mask_ack,
> .irq_unmask = pm8xxx_irq_unmask,
> .irq_set_type = pm8xxx_irq_set_type,
> + .irq_get_irqchip_state = pm8xxx_irq_get_irqchip_state,
> .flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE,
> };
>
>
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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