From f1837e4ad502d6b15be864ace04b681e5b0fd49e Mon Sep 17 00:00:00 2001 From: Bjorn Andersson Date: Tue, 14 Jul 2015 23:40:34 -0700 Subject: [PATCH] mfd: pm8921: Implement irq_get_irqchip_state 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 Acked-by: Linus Walleij Signed-off-by: Lee Jones --- drivers/mfd/pm8921-core.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/drivers/mfd/pm8921-core.c b/drivers/mfd/pm8921-core.c index 5a92646a2ccb..00856a67d34b 100644 --- a/drivers/mfd/pm8921-core.c +++ b/drivers/mfd/pm8921-core.c @@ -236,11 +236,49 @@ 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 (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; +} + 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, }; -- 2.20.1