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ARM: imx: create mxc_arch_reset_init_dt() for DT boot

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The mxc_arch_reset_init() uses static mapping and calls clk_get_sys() to
get clock.  It's suitable for non-DT boot but not for DT boot where
dynamic mapping and of_clk_get() should be used instead.  Create
mxc_arch_reset_init_dt() as the DT variant of mxc_arch_reset_init(),
and change DT platforms to use it.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Shawn Guo
2013-05-10 10:19:01 +08:00
parent 18cb680f1a
commit c1e31d126b
7 changed files with 26 additions and 9 deletions
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20
arch/arm/mach-imx/system.c
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@@ -21,6 +21,8 @@
#include <linux/io.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <asm/system_misc.h>
#include <asm/proc-fns.h>
@@ -75,3 +77,21 @@ void __init mxc_arch_reset_init(void __iomem *base)
clk_prepare(wdog_clk);
}
void __init mxc_arch_reset_init_dt(void)
{
struct device_node *np;
np = of_find_compatible_node(NULL, NULL, "fsl,imx21-wdt");
wdog_base = of_iomap(np, 0);
WARN_ON(!wdog_base);
wdog_clk = of_clk_get(np, 0);
if (IS_ERR(wdog_clk)) {
pr_warn("%s: failed to get wdog clock\n", __func__);
wdog_clk = NULL;
return;
}
clk_prepare(wdog_clk);
}