1 files changed, 26 insertions, 14 deletions

diff --git a/arch/arm/plat-spear/time.c b/arch/arm/plat-spear/time.c
index 1c94989d725f..03321af5de9f 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);
@@ -225,7 +239,7 @@ void __init spear_setup_timer(void)
                 goto err_prepare_enable_clk;
         }
 
-        spear_clockevent_init();
+        spear_clockevent_init(irq);
         spear_clocksource_init();
 
         return;
@@ -234,6 +248,4 @@ err_prepare_enable_clk:
         clk_put(gpt_clk);
 err_iomap:
         iounmap(gpt_base);
-err_mem:
-        release_mem_region(SPEAR_GPT0_BASE, SZ_1K);
 }