linux-kernel - [PATCH 2/3] gpio: dwapb: do not create the irq mapping upfront.

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Date:	Thu, 20 Mar 2014 20:55:23 +0100
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Alan Tull <atull@...era.com>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
	Dinh Nguyen <dinguyen@...era.com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH 2/3] gpio: dwapb: do not create the irq mapping upfront.

After the irq chip got registered the driver creates a mapping for every
gpio line. This mapping be useless if the gpio in question never is
beeing used a irq line. The mapping should be created by the core on
request.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 drivers/gpio/gpio-dwapb.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index 4d25a06b..0db0b94 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -211,7 +211,7 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
 	struct gpio_chip *gc = &port->bgc.gc;
 	struct device_node *node =  gc->of_node;
 	struct irq_chip_generic	*irq_gc;
-	unsigned int hwirq, ngpio = gc->ngpio;
+	unsigned int ngpio = gc->ngpio;
 	struct irq_chip_type *ct;
 	int err, irq;
 
@@ -263,9 +263,6 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
 	irq_set_chained_handler(irq, dwapb_irq_handler);
 	irq_set_handler_data(irq, gpio);
 
-	for (hwirq = 0 ; hwirq < ngpio ; hwirq++)
-		irq_create_mapping(gpio->domain, hwirq);
-
 	port->bgc.gc.to_irq = dwapb_gpio_to_irq;
 }
 
-- 
1.9.1

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