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[PATCH 04/19] irqchip: atmel-aic: replace magic numbers with named constant

From Milo Kim <milo.kim@ti.com>
Newsgroups linux.kernel
Subject [PATCH 04/19] irqchip: atmel-aic: replace magic numbers with named constant
Date 2016-01-04 05:30 +0100
Message-ID <qN4Wm-6EU-23@gated-at.bofh.it> (permalink)
References <qN4Wl-6EU-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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One AIC IRQ chip can have 32 interrupt source.
To enhance code readability, magic number is replaced with named constant,
'AIC_IRQS_PER_CHIP'.

aic_hw_init() initializes vector registers up to total number of
AIC interrupts. This magic number is replaced with NR_AIC_IRQS.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Boris BREZILLON <boris.brezillon@free-electrons.com>
Cc: Ludovic Desroches <ludovic.desroches@atmel.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Milo Kim <milo.kim@ti.com>
---
 drivers/irqchip/irq-atmel-aic-common.c | 11 ++++++-----
 drivers/irqchip/irq-atmel-aic-common.h |  1 +
 drivers/irqchip/irq-atmel-aic.c        |  2 +-
 drivers/irqchip/irq-atmel-aic5.c       |  4 ++--
 4 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/irqchip/irq-atmel-aic-common.c b/drivers/irqchip/irq-atmel-aic-common.c
index ef2c619..5effd52 100644
--- a/drivers/irqchip/irq-atmel-aic-common.c
+++ b/drivers/irqchip/irq-atmel-aic-common.c
@@ -135,7 +135,7 @@ static void __init aic_common_ext_irq_of_init(struct irq_domain *domain)
 		}
 
 		aic = gc->private;
-		aic->ext_irqs |= (1 << (hwirq % 32));
+		aic->ext_irqs |= (1 << (hwirq % AIC_IRQS_PER_CHIP));
 	}
 }
 
@@ -151,7 +151,7 @@ struct irq_domain *__init aic_common_of_init(struct device_node *node,
 	int ret;
 	int i;
 
-	nchips = DIV_ROUND_UP(nirqs, 32);
+	nchips = DIV_ROUND_UP(nirqs, AIC_IRQS_PER_CHIP);
 
 	reg_base = of_iomap(node, 0);
 	if (!reg_base)
@@ -163,13 +163,14 @@ struct irq_domain *__init aic_common_of_init(struct device_node *node,
 		goto err_iounmap;
 	}
 
-	domain = irq_domain_add_linear(node, nchips * 32, ops, aic);
+	domain = irq_domain_add_linear(node, nchips * AIC_IRQS_PER_CHIP, ops,
+				       aic);
 	if (!domain) {
 		ret = -ENOMEM;
 		goto err_free_aic;
 	}
 
-	ret = irq_alloc_domain_generic_chips(domain, 32, 1, name,
+	ret = irq_alloc_domain_generic_chips(domain, AIC_IRQS_PER_CHIP, 1, name,
 					     handle_fasteoi_irq,
 					     IRQ_NOREQUEST | IRQ_NOPROBE |
 					     IRQ_NOAUTOEN, 0, 0);
@@ -177,7 +178,7 @@ struct irq_domain *__init aic_common_of_init(struct device_node *node,
 		goto err_domain_remove;
 
 	for (i = 0; i < nchips; i++) {
-		gc = irq_get_domain_generic_chip(domain, i * 32);
+		gc = irq_get_domain_generic_chip(domain, i * AIC_IRQS_PER_CHIP);
 
 		gc->reg_base = reg_base;
 
diff --git a/drivers/irqchip/irq-atmel-aic-common.h b/drivers/irqchip/irq-atmel-aic-common.h
index c178557..4c0b471 100644
--- a/drivers/irqchip/irq-atmel-aic-common.h
+++ b/drivers/irqchip/irq-atmel-aic-common.h
@@ -16,6 +16,7 @@
 #ifndef __IRQ_ATMEL_AIC_COMMON_H
 #define __IRQ_ATMEL_AIC_COMMON_H
 
+#define AIC_IRQS_PER_CHIP	32
 
 int aic_common_set_type(struct irq_data *d, unsigned type, unsigned *val);
 
diff --git a/drivers/irqchip/irq-atmel-aic.c b/drivers/irqchip/irq-atmel-aic.c
index 6fcd680..c499949 100644
--- a/drivers/irqchip/irq-atmel-aic.c
+++ b/drivers/irqchip/irq-atmel-aic.c
@@ -164,7 +164,7 @@ static void __init aic_hw_init(struct irq_domain *domain)
 	irq_reg_writel(gc, 0xffffffff, AT91_AIC_IDCR);
 	irq_reg_writel(gc, 0xffffffff, AT91_AIC_ICCR);
 
-	for (i = 0; i < 32; i++)
+	for (i = 0; i < NR_AIC_IRQS; i++)
 		irq_reg_writel(gc, i, AT91_AIC_SVR(i));
 }
 
diff --git a/drivers/irqchip/irq-atmel-aic5.c b/drivers/irqchip/irq-atmel-aic5.c
index 8b8f5e2..f5848c8 100644
--- a/drivers/irqchip/irq-atmel-aic5.c
+++ b/drivers/irqchip/irq-atmel-aic5.c
@@ -306,9 +306,9 @@ static int __init aic5_of_init(struct device_node *node,
 		return PTR_ERR(domain);
 
 	aic5_domain = domain;
-	nchips = aic5_domain->revmap_size / 32;
+	nchips = aic5_domain->revmap_size / AIC_IRQS_PER_CHIP;
 	for (i = 0; i < nchips; i++) {
-		gc = irq_get_domain_generic_chip(domain, i * 32);
+		gc = irq_get_domain_generic_chip(domain, i * AIC_IRQS_PER_CHIP);
 
 		gc->chip_types[0].regs.eoi = AT91_AIC5_EOICR;
 		gc->chip_types[0].chip.irq_mask = aic5_mask;
-- 
2.6.4

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Thread

[PATCH 00/19] irqchip: atmel-aic: make unified AIC driver Milo Kim <milo.kim@ti.com> - 2016-01-04 05:30 +0100
  [PATCH 07/19] irqchip: atmel-aic: make common IRQ domain translate function Milo Kim <milo.kim@ti.com> - 2016-01-04 05:30 +0100
  [PATCH 09/19] irqchip: atmel-aic: add common retrigger function Milo Kim <milo.kim@ti.com> - 2016-01-04 05:30 +0100
  [PATCH 13/19] irqchip: atmel-aic: clean up irq_chip_generic Milo Kim <milo.kim@ti.com> - 2016-01-04 05:30 +0100
  [PATCH 01/19] irqchip: atmel-aic: fix wrong bit operation for IRQ priority Milo Kim <milo.kim@ti.com> - 2016-01-04 05:30 +0100
    Re: [PATCH 01/19] irqchip: atmel-aic: fix wrong bit operation for  IRQ priority Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-01-04 09:20 +0100
  [PATCH 17/19] irqchip: atmel-aic: use unified IRQ chip initialization function Milo Kim <milo.kim@ti.com> - 2016-01-04 05:30 +0100
  [PATCH 06/19] irqchip: atmel-aic: introduce register data structure Milo Kim <milo.kim@ti.com> - 2016-01-04 05:30 +0100
    Re: [PATCH 06/19] irqchip: atmel-aic: introduce register data  structure Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-01-04 10:00 +0100
      Re: [PATCH 06/19] irqchip: atmel-aic: introduce register data  structure Milo Kim <milo.kim@ti.com> - 2016-01-06 09:40 +0100
  [PATCH 04/19] irqchip: atmel-aic: replace magic numbers with named constant Milo Kim <milo.kim@ti.com> - 2016-01-04 05:30 +0100
    Re: [PATCH 04/19] irqchip: atmel-aic: replace magic numbers with  named constant Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-01-04 09:30 +0100
  [PATCH 19/19] irqchip: atmel-aic: rename AIC driver and fix Kconfig Milo Kim <milo.kim@ti.com> - 2016-01-04 05:30 +0100
  [PATCH 11/19] irqchip: atmel-aic: add common PM IRQ chip operation Milo Kim <milo.kim@ti.com> - 2016-01-04 05:30 +0100
  [PATCH 12/19] irqchip: atmel-aic: use EOI register data in aic_reg_data Milo Kim <milo.kim@ti.com> - 2016-01-04 05:40 +0100
  [PATCH 14/19] irqchip: atmel-aic: add common HW init function Milo Kim <milo.kim@ti.com> - 2016-01-04 05:40 +0100
  [PATCH 10/19] irqchip: atmel-aic: add common set_type function Milo Kim <milo.kim@ti.com> - 2016-01-04 05:40 +0100
  [PATCH 08/19] irqchip: atmel-aic: add common mask and unmask functions Milo Kim <milo.kim@ti.com> - 2016-01-04 05:40 +0100
    Re: [PATCH 08/19] irqchip: atmel-aic: add common mask and unmask  functions Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-01-04 09:50 +0100
  [PATCH 02/19] irqchip: atmel-aic: clean up RTC interrupt code Milo Kim <milo.kim@ti.com> - 2016-01-04 05:40 +0100
    Re: [PATCH 02/19] irqchip: atmel-aic: clean up RTC interrupt code Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-01-04 09:20 +0100
  [PATCH 05/19] irqchip: atmel-aic: use simple constant to get number of interrupts per chip Milo Kim <milo.kim@ti.com> - 2016-01-04 05:40 +0100
    Re: [PATCH 05/19] irqchip: atmel-aic: use simple constant to get  number of interrupts per chip Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-01-04 09:40 +0100
  [PATCH 03/19] irqchip: atmel-aic: clean up RTT interrupt code Milo Kim <milo.kim@ti.com> - 2016-01-04 05:40 +0100
    Re: [PATCH 03/19] irqchip: atmel-aic: clean up RTT interrupt code Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-01-04 09:20 +0100
  [PATCH 15/19] irqchip: atmel-aic: add common interrupt handler Milo Kim <milo.kim@ti.com> - 2016-01-04 05:40 +0100
  Re: [PATCH 00/19] irqchip: atmel-aic: make unified AIC driver Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-01-04 10:10 +0100
    Re: [PATCH 00/19] irqchip: atmel-aic: make unified AIC driver Nicolas Ferre <nicolas.ferre@atmel.com> - 2016-01-04 10:40 +0100
      Re: [PATCH 00/19] irqchip: atmel-aic: make unified AIC driver Milo Kim <milo.kim@ti.com> - 2016-01-06 09:00 +0100
    Re: [PATCH 00/19] irqchip: atmel-aic: make unified AIC driver Milo Kim <milo.kim@ti.com> - 2016-01-06 08:50 +0100
      Re: [PATCH 00/19] irqchip: atmel-aic: make unified AIC driver Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-01-06 10:10 +0100
        Re: [PATCH 00/19] irqchip: atmel-aic: make unified AIC driver Jason Cooper <jason@lakedaemon.net> - 2016-01-06 15:50 +0100
        Re: [PATCH 00/19] irqchip: atmel-aic: make unified AIC driver Milo Kim <milo.kim@ti.com> - 2016-01-07 08:50 +0100

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