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spmi-pmic-arb: add support to dispatch interrupt based on IRQ status

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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.

Change-Id: I068f5c7d33758063878721d7cce1308fa803e3bd
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>
Signed-off-by: David Collins <collinsd@codeaurora.org>
This commit is contained in:
Ashay Jaiswal 2019-11-01 14:18:00 -07:00 committed by David Collins
parent ec3e552e05
commit 4334628b38
1 changed files with 28 additions and 0 deletions
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28
drivers/spmi/spmi-pmic-arb.c
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@ -626,12 +626,18 @@ static void pmic_arb_chained_irq(struct irq_desc *desc)
u8 ee = pmic_arb->ee;
u32 status, enable;
int i, id, apid;
/* status based dispatch */
bool acc_valid = false;
u32 irq_status = 0;
chained_irq_enter(chip, desc);
for (i = first; i <= last; ++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);
@ -649,6 +655,28 @@ 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 = pmic_arb->min_apid; i <= pmic_arb->max_apid; 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);
periph_interrupt(pmic_arb, i);
}
}
}
}
chained_irq_exit(chip, desc);
}