diff options
| author | Stephan Gerhold <stephan@gerhold.net> | 2021-07-12 15:57:02 +0200 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2021-08-04 22:20:03 -0500 |
| commit | c73a6852b42c8c80cc46590dbbcfa6c448fdbc63 (patch) | |
| tree | a531affc89a36dfee5df5d8cc829b15bbb623174 | |
| parent | ad68c620b7b296aab9cbe61802e329c04fde8385 (diff) | |
| download | linux-c73a6852b42c8c80cc46590dbbcfa6c448fdbc63.tar.bz2 | |
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 <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20210712135703.324748-1-stephan@gerhold.net
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| -rw-r--r-- | drivers/soc/qcom/smsm.c | 17 |
1 files changed, 17 insertions, 0 deletions
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, }; /** |