linux-kernel - [RFC 1/2] irqchip: qcom: pdc: Introduce irq_set

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Date:   Mon, 17 Feb 2020 18:30:07 +0530
From:   Maulik Shah <mkshah@...eaurora.org>
To:     swboyd@...omium.org, mka@...omium.org, evgreen@...omium.org,
        bjorn.andersson@...aro.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        agross@...nel.org, linus.walleij@...aro.org, tglx@...utronix.de,
        dianders@...omium.org, rnayak@...eaurora.org, ilina@...eaurora.org,
        lsrao@...eaurora.org, Maulik Shah <mkshah@...eaurora.org>
Subject: [RFC 1/2] irqchip: qcom: pdc: Introduce irq_set_wake call

Change the way interrupts get enabled at wakeup capable PDC irq chip.
Introduce irq_set_wake call which lets interrupts enabled at PDC with
enable_irq_wake and disabled with disable_irq_wake.

Remove irq_disable and irq_enable calls which now will default to irq_mask
and irq_unmask.

Signed-off-by: Maulik Shah <mkshah@...eaurora.org>
---
 drivers/irqchip/qcom-pdc.c | 27 ++++++++++-----------------
 1 file changed, 10 insertions(+), 17 deletions(-)

diff --git a/drivers/irqchip/qcom-pdc.c b/drivers/irqchip/qcom-pdc.c
index 6ae9e1f..145d4ae 100644
--- a/drivers/irqchip/qcom-pdc.c
+++ b/drivers/irqchip/qcom-pdc.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
  */
 
 #include <linux/err.h>
@@ -87,22 +87,17 @@ static void pdc_enable_intr(struct irq_data *d, bool on)
 	raw_spin_unlock(&pdc_lock);
 }
 
-static void qcom_pdc_gic_disable(struct irq_data *d)
+static int qcom_pdc_gic_set_wake(struct irq_data *d, unsigned int on)
 {
 	if (d->hwirq == GPIO_NO_WAKE_IRQ)
-		return;
-
-	pdc_enable_intr(d, false);
-	irq_chip_disable_parent(d);
-}
+		return 0;
 
-static void qcom_pdc_gic_enable(struct irq_data *d)
-{
-	if (d->hwirq == GPIO_NO_WAKE_IRQ)
-		return;
+	if (on)
+		pdc_enable_intr(d, true);
+	else
+		pdc_enable_intr(d, false);
 
-	pdc_enable_intr(d, true);
-	irq_chip_enable_parent(d);
+	return irq_chip_set_wake_parent(d, on);
 }
 
 static void qcom_pdc_gic_mask(struct irq_data *d)
@@ -197,15 +192,13 @@ static struct irq_chip qcom_pdc_gic_chip = {
 	.irq_eoi		= irq_chip_eoi_parent,
 	.irq_mask		= qcom_pdc_gic_mask,
 	.irq_unmask		= qcom_pdc_gic_unmask,
-	.irq_disable		= qcom_pdc_gic_disable,
-	.irq_enable		= qcom_pdc_gic_enable,
 	.irq_get_irqchip_state	= qcom_pdc_gic_get_irqchip_state,
 	.irq_set_irqchip_state	= qcom_pdc_gic_set_irqchip_state,
 	.irq_retrigger		= irq_chip_retrigger_hierarchy,
 	.irq_set_type		= qcom_pdc_gic_set_type,
+	.irq_set_wake		= qcom_pdc_gic_set_wake,
 	.flags			= IRQCHIP_MASK_ON_SUSPEND |
-				  IRQCHIP_SET_TYPE_MASKED |
-				  IRQCHIP_SKIP_SET_WAKE,
+				  IRQCHIP_SET_TYPE_MASKED,
 	.irq_set_vcpu_affinity	= irq_chip_set_vcpu_affinity_parent,
 	.irq_set_affinity	= irq_chip_set_affinity_parent,
 };
-- 
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