linux-kernel - [PATCH V3 5/5] spmi: pmic-arb: use irq_chip callback to set spmi irq wakeup capability

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Date:   Tue, 18 Jul 2017 15:40:32 +0530
From:   Kiran Gunda <kgunda@...eaurora.org>
To:     gregkh@...uxfoundation.org, sboyd@...eaurora.org,
        Kiran Gunda <kgunda@...eaurora.org>,
        Abhijeet Dharmapurikar <adharmap@...eaurora.org>,
        David Collins <collinsd@...eaurora.org>,
        linux-kernel@...r.kernel.org
Cc:     linux-arm-msm@...r.kernel.org
Subject: [PATCH V3 5/5] spmi: pmic-arb: use irq_chip callback to set spmi irq wakeup capability

Currently the driver sets the pmic arbiter core interrupt as wakeup capable
irrespective of the child irqs which causes the system to wakeup
unnecessarily. To fix this, set the core interrupt as wakeup capable
only if any of the child irqs request for it. Do this by marking it as
wakeup capable in the irq_set_wake callback.

Signed-off-by: Kiran Gunda <kgunda@...eaurora.org>
Reviewed-by: Stephen Boyd <sboyd@...eaurora.org>
---
 drivers/spmi/spmi-pmic-arb.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 4795092..4824820 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -623,6 +623,13 @@ static int qpnpint_irq_set_type(struct irq_data *d, unsigned int flow_type)
 	return 0;
 }
 
+static int qpnpint_irq_set_wake(struct irq_data *d, unsigned int on)
+{
+	struct spmi_pmic_arb *pmic_arb = irq_data_get_irq_chip_data(d);
+
+	return irq_set_irq_wake(pmic_arb->irq, on);
+}
+
 static int qpnpint_get_irqchip_state(struct irq_data *d,
 				     enum irqchip_irq_state which,
 				     bool *state)
@@ -645,9 +652,9 @@ static int qpnpint_get_irqchip_state(struct irq_data *d,
 	.irq_mask	= qpnpint_irq_mask,
 	.irq_unmask	= qpnpint_irq_unmask,
 	.irq_set_type	= qpnpint_irq_set_type,
+	.irq_set_wake	= qpnpint_irq_set_wake,
 	.irq_get_irqchip_state	= qpnpint_get_irqchip_state,
-	.flags		= IRQCHIP_MASK_ON_SUSPEND
-			| IRQCHIP_SKIP_SET_WAKE,
+	.flags		= IRQCHIP_MASK_ON_SUSPEND,
 };
 
 static int qpnpint_irq_domain_dt_translate(struct irq_domain *d,
@@ -1069,8 +1076,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 
 	irq_set_chained_handler_and_data(pmic_arb->irq, pmic_arb_chained_irq,
 					pmic_arb);
-	enable_irq_wake(pmic_arb->irq);
-
 	err = spmi_controller_add(ctrl);
 	if (err)
 		goto err_domain_remove;
-- 
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