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Diffstat (limited to 'arch/arm/plat-spear/time.c')
-rw-r--r--arch/arm/plat-spear/time.c48
1 files changed, 30 insertions, 18 deletions
diff --git a/arch/arm/plat-spear/time.c b/arch/arm/plat-spear/time.c
index abb5bde..03321af 100644
--- a/arch/arm/plat-spear/time.c
+++ b/arch/arm/plat-spear/time.c
@@ -15,14 +15,15 @@
#include <linux/err.h>
#include <linux/init.h>
#include <linux/interrupt.h>
+#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/kernel.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
#include <linux/time.h>
#include <linux/irq.h>
#include <asm/mach/time.h>
#include <mach/generic.h>
-#include <mach/hardware.h>
-#include <mach/irqs.h>
/*
* We would use TIMER0 and TIMER1 as clockevent and clocksource.
@@ -175,7 +176,7 @@ static struct irqaction spear_timer_irq = {
.handler = spear_timer_interrupt
};
-static void __init spear_clockevent_init(void)
+static void __init spear_clockevent_init(int irq)
{
u32 tick_rate;
@@ -195,22 +196,35 @@ static void __init spear_clockevent_init(void)
clockevents_register_device(&clkevt);
- setup_irq(SPEAR_GPT0_CHAN0_IRQ, &spear_timer_irq);
+ setup_irq(irq, &spear_timer_irq);
}
-void __init spear_setup_timer(void)
+const static struct of_device_id timer_of_match[] __initconst = {
+ { .compatible = "st,spear-timer", },
+ { },
+};
+
+void __init spear_setup_of_timer(void)
{
- int ret;
+ struct device_node *np;
+ int irq, ret;
+
+ np = of_find_matching_node(NULL, timer_of_match);
+ if (!np) {
+ pr_err("%s: No timer passed via DT\n", __func__);
+ return;
+ }
- if (!request_mem_region(SPEAR_GPT0_BASE, SZ_1K, "gpt0")) {
- pr_err("%s:cannot get IO addr\n", __func__);
+ irq = irq_of_parse_and_map(np, 0);
+ if (!irq) {
+ pr_err("%s: No irq passed for timer via DT\n", __func__);
return;
}
- gpt_base = (void __iomem *)ioremap(SPEAR_GPT0_BASE, SZ_1K);
+ gpt_base = of_iomap(np, 0);
if (!gpt_base) {
- pr_err("%s:ioremap failed for gpt\n", __func__);
- goto err_mem;
+ pr_err("%s: of iomap failed\n", __func__);
+ return;
}
gpt_clk = clk_get_sys("gpt0", NULL);
@@ -219,21 +233,19 @@ void __init spear_setup_timer(void)
goto err_iomap;
}
- ret = clk_enable(gpt_clk);
+ ret = clk_prepare_enable(gpt_clk);
if (ret < 0) {
- pr_err("%s:couldn't enable gpt clock\n", __func__);
- goto err_clk;
+ pr_err("%s:couldn't prepare-enable gpt clock\n", __func__);
+ goto err_prepare_enable_clk;
}
- spear_clockevent_init();
+ spear_clockevent_init(irq);
spear_clocksource_init();
return;
-err_clk:
+err_prepare_enable_clk:
clk_put(gpt_clk);
err_iomap:
iounmap(gpt_base);
-err_mem:
- release_mem_region(SPEAR_GPT0_BASE, SZ_1K);
}