From: Ashay Jaiswal <ashayj@xxxxxxxxxxxxxx>
Current implementation of SPMI arbiter dispatches interrupt based on the
Arbiter's accumulator status, in some cases the accumulator status may
remain zero and the interrupt remains un-handled. Add logic to dispatch
interrupts based Arbiter's IRQ status if the accumulator status is zero.
Signed-off-by: Ashay Jaiswal <ashayj@xxxxxxxxxxxxxx>
Signed-off-by: David Collins <collinsd@xxxxxxxxxxxxxx>
Signed-off-by: Fenglin Wu <quic_fenglinw@xxxxxxxxxxx>
---
drivers/spmi/spmi-pmic-arb.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 479f721..127a427 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -528,12 +528,18 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
u8 ee = pmic_arb->ee;
u32 status, enable, handled = 0;
int i, id, apid;
+ /* status based dispatch */
+ bool acc_valid = false;
+ u32 irq_status = 0;
chained_irq_enter(chip, desc);
for (i = first >> 5; i <= last >> 5; ++i) {
status = readl_relaxed(
ver_ops->owner_acc_status(pmic_arb, ee, i));
+ if (status)
+ acc_valid = true;
+
while (status) {
id = ffs(status) - 1;
status &= ~BIT(id);
@@ -551,6 +557,29 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
}
}
+ /* ACC_STATUS is empty but IRQ fired check IRQ_STATUS */
+ if (!acc_valid) {
+ for (i = first; i <= last; i++) {
+ /* skip if APPS is not irq owner */
+ if (pmic_arb->apid_data[i].irq_ee != pmic_arb->ee)
+ continue;
+
+ irq_status = readl_relaxed(
+ ver_ops->irq_status(pmic_arb, i));
+ if (irq_status) {
+ enable = readl_relaxed(
+ ver_ops->acc_enable(pmic_arb, i));
+ if (enable & SPMI_PIC_ACC_ENABLE_BIT) {
+ dev_dbg(&pmic_arb->spmic->dev,
+ "Dispatching IRQ for apid=%d status=%x\n",
+ i, irq_status);
+ if (periph_interrupt(pmic_arb, i) == 0)
+ handled++;
+ }
+ }
+ }
+ }
+
if (handled == 0)
handle_bad_irq(desc);
--
2.7.4
