From c73a6852b42c8c80cc46590dbbcfa6c448fdbc63 Mon Sep 17 00:00:00 2001 From: Stephan Gerhold Date: Mon, 12 Jul 2021 15:57:02 +0200 Subject: soc: qcom: smsm: Implement support for get_irqchip_state At the moment there is no way for drivers to get the current state of the interrupt signal reported by a remote processor. The irqchip API has generic functionality for this, using irq_get_irqchip_state(). Implement support for getting the IRQCHIP_STATE_LINE_LEVEL by reading the remote state and checking the bit for the specified IRQ. Signed-off-by: Stephan Gerhold Link: https://lore.kernel.org/r/20210712135703.324748-1-stephan@gerhold.net Signed-off-by: Bjorn Andersson --- drivers/soc/qcom/smsm.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'drivers/soc/qcom/smsm.c') diff --git a/drivers/soc/qcom/smsm.c b/drivers/soc/qcom/smsm.c index 1d3d5e3ec2b0..a48f9db98836 100644 --- a/drivers/soc/qcom/smsm.c +++ b/drivers/soc/qcom/smsm.c @@ -299,11 +299,28 @@ static int smsm_set_irq_type(struct irq_data *irqd, unsigned int type) return 0; } +static int smsm_get_irqchip_state(struct irq_data *irqd, + enum irqchip_irq_state which, bool *state) +{ + struct smsm_entry *entry = irq_data_get_irq_chip_data(irqd); + irq_hw_number_t irq = irqd_to_hwirq(irqd); + u32 val; + + if (which != IRQCHIP_STATE_LINE_LEVEL) + return -EINVAL; + + val = readl(entry->remote_state); + *state = !!(val & BIT(irq)); + + return 0; +} + static struct irq_chip smsm_irq_chip = { .name = "smsm", .irq_mask = smsm_mask_irq, .irq_unmask = smsm_unmask_irq, .irq_set_type = smsm_set_irq_type, + .irq_get_irqchip_state = smsm_get_irqchip_state, }; /** -- cgit v1.2.3