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

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@codeaurora.org>
Signed-off-by: David Collins <collinsd@codeaurora.org>
Signed-off-by: Fenglin Wu <quic_fenglinw@quicinc.com>
Link: https://lore.kernel.org/r/1655004286-11493-6-git-send-email-quic_fenglinw@quicinc.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20220930005019.2663064-7-sboyd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ashay Jaiswal 2022-09-29 17:50:15 -07:00 committed by Greg Kroah-Hartman
parent 191adbdd26
commit 4df88fe5b6
1 changed files with 29 additions and 0 deletions
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29
drivers/spmi/spmi-pmic-arb.c
View File

@ -630,12 +630,18 @@ 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);
@ -653,6 +659,29 @@ 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);