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authorViresh Kumar <viresh.kumar@st.com>2012-04-21 13:15:37 +0530
committerArnd Bergmann <arnd@arndb.de>2012-05-12 21:03:26 +0200
commit30551c0108e0d2fed48778a6bbd52843088bcb7b (patch)
treeb26eba9ad07964e76465bddb42474e25c4690597 /arch/arm/plat-spear
parentfa599c333d3d66846545026b41bcf36d1350fe30 (diff)
downloadop-kernel-dev-30551c0108e0d2fed48778a6bbd52843088bcb7b.zip
op-kernel-dev-30551c0108e0d2fed48778a6bbd52843088bcb7b.tar.gz
SPEAr: Add DT bindings for SPEAr's timer
All SPEAr SoC's use ST's Timer module. This patch adds device tree probing capability for that. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/plat-spear')
-rw-r--r--arch/arm/plat-spear/time.c31
1 files changed, 22 insertions, 9 deletions
diff --git a/arch/arm/plat-spear/time.c b/arch/arm/plat-spear/time.c
index a3164d1..9a37898 100644
--- a/arch/arm/plat-spear/time.c
+++ b/arch/arm/plat-spear/time.c
@@ -18,6 +18,8 @@
#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>
@@ -197,19 +199,32 @@ static void __init spear_clockevent_init(int irq)
setup_irq(irq, &spear_timer_irq);
}
-void __init spear_setup_timer(resource_size_t base, int irq)
+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(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 = ioremap(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);
@@ -233,6 +248,4 @@ err_clk:
clk_put(gpt_clk);
err_iomap:
iounmap(gpt_base);
-err_mem:
- release_mem_region(base, SZ_1K);
}
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