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Commit 40df14cc authored by Linus Walleij's avatar Linus Walleij
Browse files

clocksource/drivers/ixp4xx: Add OF initialization support 



This adds support for setting up the IXP4xx timer driver from
device tree.

Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 7c23b0e1

drivers/clocksource/timer-ixp4xx.c

+35 −0
Original line number Diff line number Diff line
@@ -16,6 +16,8 @@ 
#include <linux/slab.h>

#include <linux/bitops.h>

#include <linux/delay.h>

#include <linux/of_address.h>

#include <linux/of_irq.h>

/* Goes away with OF conversion */

#include <linux/platform_data/timer-ixp4xx.h>
@@ -247,3 +249,36 @@ void __init ixp4xx_timer_setup(resource_size_t timerbase, 
	ixp4xx_timer_register(base, timer_irq, timer_freq);

}

EXPORT_SYMBOL_GPL(ixp4xx_timer_setup);



#ifdef CONFIG_OF

static __init int ixp4xx_of_timer_init(struct device_node *np)

{

	void __iomem *base;

	int irq;

	int ret;



	base = of_iomap(np, 0);

	if (!base) {

		pr_crit("IXP4xx: can't remap timer\n");

		return -ENODEV;

	}



	irq = irq_of_parse_and_map(np, 0);

	if (irq <= 0) {

		pr_err("Can't parse IRQ\n");

		ret = -EINVAL;

		goto out_unmap;

	}



	/* TODO: get some fixed clocks into the device tree */

	ret = ixp4xx_timer_register(base, irq, 66666000);

	if (ret)

		goto out_unmap;

	return 0;



out_unmap:

	iounmap(base);

	return ret;

}

TIMER_OF_DECLARE(ixp4xx, "intel,ixp4xx-timer", ixp4xx_of_timer_init);

#endif