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ARM: mxs: get ocotp base address from device tree

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Instead of using the static definitions, get ocotp base address from
device tree with mapping.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Shawn Guo 2013-03-29 09:59:28 +08:00
parent 974a9af532
commit 69d75a02db
3 changed files with 10 additions and 1 deletions
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1
arch/arm/boot/dts/imx23.dtsi
View file

@ -322,6 +322,7 @@ pxp@8002a000 {
};
ocotp@8002c000 {
compatible = "fsl,ocotp";
reg = <0x8002c000 0x2000>;
status = "disabled";
};

1
arch/arm/boot/dts/imx28.dtsi
View file

@ -677,6 +677,7 @@ pxp@8002a000 {
};
ocotp@8002c000 {
compatible = "fsl,ocotp";
reg = <0x8002c000 0x2000>;
status = "disabled";
};

9
arch/arm/mach-mxs/ocotp.c
View file

@ -15,6 +15,8 @@
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <asm/processor.h> /* for cpu_relax() */
@ -33,7 +35,8 @@ static u32 ocotp_words[OCOTP_WORD_COUNT];
const u32 *mxs_get_ocotp(void)
{
void __iomem *ocotp_base = MXS_IO_ADDRESS(MXS_OCOTP_BASE_ADDR);
struct device_node *np;
void __iomem *ocotp_base;
int timeout = 0x400;
size_t i;
static int once = 0;
@ -41,6 +44,10 @@ const u32 *mxs_get_ocotp(void)
if (once)
return ocotp_words;
np = of_find_compatible_node(NULL, NULL, "fsl,ocotp");
ocotp_base = of_iomap(np, 0);
WARN_ON(!ocotp_base);
mutex_lock(&ocotp_mutex);
/*