diff options
| author | Shawn Guo <shawn.guo@linaro.org> | 2013-03-29 05:59:28 +0400 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2013-04-01 16:42:16 +0400 |
| commit | 69d75a02db28c8bb04a4a70b1a577d571fc8e800 (patch) | |
| tree | 2e721b28b48bae1ebad9026efb01e11cfa8500ad | |
| parent | 974a9af5320028bad0c4c17a67353edc4e5a1997 (diff) | |
| download | linux-69d75a02db28c8bb04a4a70b1a577d571fc8e800.tar.xz | |
ARM: mxs: get ocotp base address from device tree
Instead of using the static definitions, get ocotp base address from
device tree with mapping.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
| -rw-r--r-- | arch/arm/boot/dts/imx23.dtsi | 1 | ||||
| -rw-r--r-- | arch/arm/boot/dts/imx28.dtsi | 1 | ||||
| -rw-r--r-- | arch/arm/mach-mxs/ocotp.c | 9 |
3 files changed, 10 insertions, 1 deletions
diff --git a/arch/arm/boot/dts/imx23.dtsi b/arch/arm/boot/dts/imx23.dtsi index 30b410b2e243..ad2d79324cd3 100644 --- a/arch/arm/boot/dts/imx23.dtsi +++ b/arch/arm/boot/dts/imx23.dtsi @@ -322,6 +322,7 @@ }; ocotp@8002c000 { + compatible = "fsl,ocotp"; reg = <0x8002c000 0x2000>; status = "disabled"; }; diff --git a/arch/arm/boot/dts/imx28.dtsi b/arch/arm/boot/dts/imx28.dtsi index 56d84bf208c7..64af2381c1b0 100644 --- a/arch/arm/boot/dts/imx28.dtsi +++ b/arch/arm/boot/dts/imx28.dtsi @@ -677,6 +677,7 @@ }; ocotp@8002c000 { + compatible = "fsl,ocotp"; reg = <0x8002c000 0x2000>; status = "disabled"; }; diff --git a/arch/arm/mach-mxs/ocotp.c b/arch/arm/mach-mxs/ocotp.c index 1dff46703753..c2002eb2655e 100644 --- a/arch/arm/mach-mxs/ocotp.c +++ b/arch/arm/mach-mxs/ocotp.c @@ -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); /* |