diff options
Diffstat (limited to 'arch/arm/plat-spear/time.c')
| -rw-r--r-- | arch/arm/plat-spear/time.c | 39 |
1 files changed, 26 insertions, 13 deletions
diff --git a/arch/arm/plat-spear/time.c b/arch/arm/plat-spear/time.c index a3164d1647f..03321af5de9 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); @@ -218,10 +233,10 @@ void __init spear_setup_timer(resource_size_t base, int irq) 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(irq); @@ -229,10 +244,8 @@ void __init spear_setup_timer(resource_size_t base, int irq) return; -err_clk: +err_prepare_enable_clk: clk_put(gpt_clk); err_iomap: iounmap(gpt_base); -err_mem: - release_mem_region(base, SZ_1K); } |