From: Stephen Boyd <sboyd@kernel.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ashay Jaiswal <ashayj@codeaurora.org>,
linux-kernel@vger.kernel.org, patches@lists.linux.dev,
David Collins <collinsd@codeaurora.org>,
Fenglin Wu <quic_fenglinw@quicinc.com>
Subject: [PATCH 6/9] spmi: pmic-arb: add support to dispatch interrupt based on IRQ status
Date: Thu, 29 Sep 2022 17:50:15 -0700 [thread overview]
Message-ID: <20220930005019.2663064-7-sboyd@kernel.org> (raw)
In-Reply-To: <20220930005019.2663064-1-sboyd@kernel.org>
From: Ashay Jaiswal <ashayj@codeaurora.org>
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>
---
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 e19eaec30aa5..56f22941d570 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -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);
--
https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/
https://git.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi.git
next prev parent reply other threads:[~2022-09-30 0:50 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-30 0:50 [PATCH 0/9] SPMI patches for v6.1 Stephen Boyd
2022-09-30 0:50 ` [PATCH 1/9] drivers: spmi: Directly use ida_alloc()/free() Stephen Boyd
2022-09-30 0:50 ` [PATCH 2/9] spmi: pmic-arb: add a print in cleanup_irq Stephen Boyd
2022-09-30 0:50 ` [PATCH 3/9] spmi: pmic-arb: handle spurious interrupt Stephen Boyd
2022-09-30 0:50 ` [PATCH 4/9] spmi: pmic-arb: do not ack and clear peripheral interrupts in cleanup_irq Stephen Boyd
2022-09-30 0:50 ` [PATCH 5/9] spmi: pmic-arb: check apid against limits before calling irq handler Stephen Boyd
2022-09-30 0:50 ` Stephen Boyd [this message]
2022-09-30 0:50 ` [PATCH 7/9] spmi: pmic-arb: correct duplicate APID to PPID mapping logic Stephen Boyd
2022-09-30 0:50 ` [PATCH 8/9] spmi: pmic-arb: block access for invalid PMIC arbiter v5 SPMI writes Stephen Boyd
2022-09-30 0:50 ` [PATCH 9/9] spmi: pmic-arb: increase SPMI transaction timeout delay Stephen Boyd
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