linux-kernel - [PATCH 4/4] irqchip: ingenic: Alloc generic chips from IRQ domain

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Date:   Sat, 27 Jul 2019 15:17:41 -0400
From:   Paul Cercueil <paul@...pouillou.net>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>
Cc:     linux-kernel@...r.kernel.org, od@...c.me,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 4/4] irqchip: ingenic: Alloc generic chips from IRQ domain

By creating the generic chips from the IRQ domain, we don't rely on the
JZ4740_IRQ_BASE macro. It also makes the code a bit cleaner.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 drivers/irqchip/irq-ingenic.c | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/drivers/irqchip/irq-ingenic.c b/drivers/irqchip/irq-ingenic.c
index 82a079fa3a3d..06ab3ad22ad2 100644
--- a/drivers/irqchip/irq-ingenic.c
+++ b/drivers/irqchip/irq-ingenic.c
@@ -36,12 +36,14 @@ static irqreturn_t intc_cascade(int irq, void *data)
 {
 	struct ingenic_intc_data *intc = irq_get_handler_data(irq);
 	struct irq_domain *domain = intc->domain;
+	struct irq_chip_generic *gc;
 	uint32_t irq_reg;
 	unsigned i;
 
 	for (i = 0; i < intc->num_chips; i++) {
-		irq_reg = readl(intc->base + (i * CHIP_SIZE) +
-				JZ_REG_INTC_PENDING);
+		gc = irq_get_domain_generic_chip(domain, i * 32);
+
+		irq_reg = irq_reg_readl(gc, JZ_REG_INTC_PENDING);
 		if (!irq_reg)
 			continue;
 
@@ -92,7 +94,7 @@ static int __init ingenic_intc_of_init(struct device_node *node,
 
 	domain = irq_domain_add_legacy(node, num_chips * 32,
 				       JZ4740_IRQ_BASE, 0,
-				       &irq_domain_simple_ops, NULL);
+				       &irq_generic_chip_ops, NULL);
 	if (!domain) {
 		err = -ENOMEM;
 		goto out_unmap_base;
@@ -100,17 +102,17 @@ static int __init ingenic_intc_of_init(struct device_node *node,
 
 	intc->domain = domain;
 
-	for (i = 0; i < num_chips; i++) {
-		/* Mask all irqs */
-		writel(0xffffffff, intc->base + (i * CHIP_SIZE) +
-		       JZ_REG_INTC_SET_MASK);
+	err = irq_alloc_domain_generic_chips(domain, 32, 1, "INTC",
+					     handle_level_irq, 0,
+					     IRQ_NOPROBE | IRQ_LEVEL, 0);
+	if (err)
+		goto out_domain_remove;
 
-		gc = irq_alloc_generic_chip("INTC", 1,
-					    JZ4740_IRQ_BASE + (i * 32),
-					    intc->base + (i * CHIP_SIZE),
-					    handle_level_irq);
+	for (i = 0; i < num_chips; i++) {
+		gc = irq_get_domain_generic_chip(domain, i * 32);
 
 		gc->wake_enabled = IRQ_MSK(32);
+		gc->reg_base = intc->base + (i * CHIP_SIZE);
 
 		ct = gc->chip_types;
 		ct->regs.enable = JZ_REG_INTC_CLEAR_MASK;
@@ -121,13 +123,15 @@ static int __init ingenic_intc_of_init(struct device_node *node,
 		ct->chip.irq_set_wake = irq_gc_set_wake;
 		ct->chip.flags = IRQCHIP_MASK_ON_SUSPEND;
 
-		irq_setup_generic_chip(gc, IRQ_MSK(32), 0, 0,
-				       IRQ_NOPROBE | IRQ_LEVEL);
+		/* Mask all irqs */
+		irq_reg_writel(gc, IRQ_MSK(32), JZ_REG_INTC_SET_MASK);
 	}
 
 	setup_irq(parent_irq, &intc_cascade_action);
 	return 0;
 
+out_domain_remove:
+	irq_domain_remove(domain);
 out_unmap_base:
 	iounmap(intc->base);
 out_unmap_irq:
-- 
2.21.0.593.g511ec345e18