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| author | Linus Walleij <linus.walleij@linaro.org> | 2019-01-27 16:06:56 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-04-23 17:02:14 +0300 |
| commit | 40df14cc5cc0e7c35366eb70dc2c80dd04cc5fbe (patch) | |
| tree | 9aa6a3384f34362a6b1602ff3596c7bcfa353857 /drivers/clocksource/timer-ixp4xx.c | |
| parent | 7c23b0e1d4d32f1d1a96730ff1abb8b6cc681cfc (diff) | |
| download | linux-40df14cc5cc0e7c35366eb70dc2c80dd04cc5fbe.tar.xz | |
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: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/clocksource/timer-ixp4xx.c')
| -rw-r--r-- | drivers/clocksource/timer-ixp4xx.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/clocksource/timer-ixp4xx.c b/drivers/clocksource/timer-ixp4xx.c index fa78f80792db..404445bc11ea 100644 --- a/drivers/clocksource/timer-ixp4xx.c +++ b/drivers/clocksource/timer-ixp4xx.c @@ -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 |