Patchwork [v2,1/1] ARM: imx28: add basic dt support

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Submitter Dong Aisheng
Date March 23, 2012, 2:31 p.m.
Message ID <1332513070-5400-1-git-send-email-b29396@freescale.com>
Download mbox | patch
Permalink /patch/148443/
State New
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Comments

Dong Aisheng - March 23, 2012, 2:31 p.m.
From: Dong Aisheng <dong.aisheng@linaro.org>

This patch includes basic dt support which can boot via nfs rootfs.

Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
---
ChangeLog v1->v2:
 * Some fixes addressed Rob's review comments.
   Remove using of OF_DEV_AUXDATA.
 * Remove mac address from dts file
   Currently we use the mac address got from uboot to work.
   Will submit a p separate atch using prom_update_property to fix this
   issue for driver based on suggestions from Grant and Lothar.
 * rename mxs-dt.c to mach-mxs.c which is supposed to support mx23 dt
   too in the future.
 * add compatible string "fsl,imx28" per Sascha's suggestion
 * add more devices in dtsi file
   For those devices still not in use, set the state to "disabled"
   by default.

For other patches i sent with this in the first series like mmc and sdma
dt support, i will send out them separately since this patch does not depend
on them and does not block you to run dt via nfs rootfs.
---
 Documentation/devicetree/bindings/arm/fsl.txt |    4 +
 arch/arm/boot/dts/imx28-evk.dts               |   35 +++
 arch/arm/boot/dts/imx28.dtsi                  |  358 +++++++++++++++++++++++++
 arch/arm/mach-mxs/Kconfig                     |    8 +
 arch/arm/mach-mxs/Makefile                    |    1 +
 arch/arm/mach-mxs/clock-mx28.c                |    4 +
 arch/arm/mach-mxs/mach-mxs.c                  |   69 +++++
 7 files changed, 479 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/boot/dts/imx28-evk.dts
 create mode 100644 arch/arm/boot/dts/imx28.dtsi
 create mode 100644 arch/arm/mach-mxs/mach-mxs.c
Marek Vasut - March 23, 2012, 2:43 p.m.
Dear Dong Aisheng,

> From: Dong Aisheng <dong.aisheng@linaro.org>
> 
> This patch includes basic dt support which can boot via nfs rootfs.
> 
> Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
> ---
> ChangeLog v1->v2:
>  * Some fixes addressed Rob's review comments.
>    Remove using of OF_DEV_AUXDATA.
>  * Remove mac address from dts file
>    Currently we use the mac address got from uboot to work.
>    Will submit a p separate atch using prom_update_property to fix this
>    issue for driver based on suggestions from Grant and Lothar.
>  * rename mxs-dt.c to mach-mxs.c which is supposed to support mx23 dt
>    too in the future.
>  * add compatible string "fsl,imx28" per Sascha's suggestion
>  * add more devices in dtsi file
>    For those devices still not in use, set the state to "disabled"
>    by default.
> 
> For other patches i sent with this in the first series like mmc and sdma
> dt support, i will send out them separately since this patch does not
> depend on them and does not block you to run dt via nfs rootfs.
> ---
>  Documentation/devicetree/bindings/arm/fsl.txt |    4 +
>  arch/arm/boot/dts/imx28-evk.dts               |   35 +++

Isn't this supposed to be "mx28evk.dts"?

>  arch/arm/boot/dts/imx28.dtsi                  |  358
> +++++++++++++++++++++++++ arch/arm/mach-mxs/Kconfig                     | 
>   8 +
>  arch/arm/mach-mxs/Makefile                    |    1 +
>  arch/arm/mach-mxs/clock-mx28.c                |    4 +
>  arch/arm/mach-mxs/mach-mxs.c                  |   69 +++++
>  7 files changed, 479 insertions(+), 0 deletions(-)
>  create mode 100644 arch/arm/boot/dts/imx28-evk.dts
>  create mode 100644 arch/arm/boot/dts/imx28.dtsi
>  create mode 100644 arch/arm/mach-mxs/mach-mxs.c
> 
> diff --git a/Documentation/devicetree/bindings/arm/fsl.txt
> b/Documentation/devicetree/bindings/arm/fsl.txt index 54bddda..9f21faf
> 100644
> --- a/Documentation/devicetree/bindings/arm/fsl.txt
> +++ b/Documentation/devicetree/bindings/arm/fsl.txt
> @@ -1,6 +1,10 @@
>  Freescale i.MX Platforms Device Tree Bindings
>  -----------------------------------------------
> 
> +i.MX28 Evaluation Kit
> +Required root node properties:
> +    - compatible = "fsl,imx28-evk", "fsl,imx28";
> +
>  i.MX51 Babbage Board
>  Required root node properties:
>      - compatible = "fsl,imx51-babbage", "fsl,imx51";
> diff --git a/arch/arm/boot/dts/imx28-evk.dts
> b/arch/arm/boot/dts/imx28-evk.dts new file mode 100644
> index 0000000..5402495
> --- /dev/null
> +++ b/arch/arm/boot/dts/imx28-evk.dts
> @@ -0,0 +1,35 @@
> +/*
> + * Copyright 2012 Freescale Semiconductor, Inc.
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +
> +/dts-v1/;
> +/include/ "imx28.dtsi"
> +
> +/ {
> +	model = "Freescale i.MX28 Evaluation Kit";
> +	compatible = "fsl,imx28-evk", "fsl,imx28";
> +
> +	memory {
> +		device_type = "memory";
> +		reg = <0x40000000 0x08000000>;
> +	};
> +
> +	ahb@80080000 {
> +		ethernet@800f0000 {

fec@... would be more readable, but I think this was decided before to be like 
this?

> +			phy-mode = "rmii";
> +			status = "okay";
> +		};
> +

[...]

> diff --git a/arch/arm/mach-mxs/Makefile b/arch/arm/mach-mxs/Makefile
> index 908bf9a..8328c45 100644
> --- a/arch/arm/mach-mxs/Makefile
> +++ b/arch/arm/mach-mxs/Makefile
> @@ -7,6 +7,7 @@ obj-$(CONFIG_PM) += pm.o
>  obj-$(CONFIG_SOC_IMX23) += clock-mx23.o
>  obj-$(CONFIG_SOC_IMX28) += clock-mx28.o
> 
> +obj-$(CONFIG_MACH_MXS_DT) += mach-mxs.o
>  obj-$(CONFIG_MACH_STMP378X_DEVB) += mach-stmp378x_devb.o
>  obj-$(CONFIG_MACH_MX23EVK) += mach-mx23evk.o
>  obj-$(CONFIG_MACH_MX28EVK) += mach-mx28evk.o
> diff --git a/arch/arm/mach-mxs/clock-mx28.c
> b/arch/arm/mach-mxs/clock-mx28.c index 5d68e41..88ed30c 100644
> --- a/arch/arm/mach-mxs/clock-mx28.c
> +++ b/arch/arm/mach-mxs/clock-mx28.c
> @@ -671,6 +671,10 @@ static struct clk_lookup lookups[] = {
>  	_REGISTER_CLOCK("imx28-fb", NULL, lcdif_clk)
>  	_REGISTER_CLOCK("mxs-saif.0", NULL, saif0_clk)
>  	_REGISTER_CLOCK("mxs-saif.1", NULL, saif1_clk)
> +	/* for DT */
> +	_REGISTER_CLOCK("80074000.serial", NULL, uart_clk)
> +	_REGISTER_CLOCK("800f0000.ethernet", NULL, fec_clk)
> +	_REGISTER_CLOCK("800f4000.ethernet", NULL, fec_clk)

Wasn't the DT stuff supposed to be more symbolic? Aka. this seems weird.

>  };
> 
>  static int clk_misc_init(void)

Best regards,
Dong Aisheng - March 23, 2012, 5:21 p.m.
Hi Marek,

On Fri, Mar 23, 2012 at 10:43 PM, Marek Vasut <marek.vasut@gmail.com> wrote:
> Dear Dong Aisheng,
>
>> From: Dong Aisheng <dong.aisheng@linaro.org>
>>
>> This patch includes basic dt support which can boot via nfs rootfs.
>>
>> Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
>> ---
>> ChangeLog v1->v2:
>>  * Some fixes addressed Rob's review comments.
>>    Remove using of OF_DEV_AUXDATA.
>>  * Remove mac address from dts file
>>    Currently we use the mac address got from uboot to work.
>>    Will submit a p separate atch using prom_update_property to fix this
>>    issue for driver based on suggestions from Grant and Lothar.
>>  * rename mxs-dt.c to mach-mxs.c which is supposed to support mx23 dt
>>    too in the future.
>>  * add compatible string "fsl,imx28" per Sascha's suggestion
>>  * add more devices in dtsi file
>>    For those devices still not in use, set the state to "disabled"
>>    by default.
>>
>> For other patches i sent with this in the first series like mmc and sdma
>> dt support, i will send out them separately since this patch does not
>> depend on them and does not block you to run dt via nfs rootfs.
>> ---
>>  Documentation/devicetree/bindings/arm/fsl.txt |    4 +
>>  arch/arm/boot/dts/imx28-evk.dts               |   35 +++
>
> Isn't this supposed to be "mx28evk.dts"?
>
I just keep consistent with other existing imx dts file like imx6q-arm2.dts.

>>  arch/arm/boot/dts/imx28.dtsi                  |  358
>> +++++++++++++++++++++++++ arch/arm/mach-mxs/Kconfig                     |
>>   8 +
>>  arch/arm/mach-mxs/Makefile                    |    1 +
>>  arch/arm/mach-mxs/clock-mx28.c                |    4 +
>>  arch/arm/mach-mxs/mach-mxs.c                  |   69 +++++
>>  7 files changed, 479 insertions(+), 0 deletions(-)
>>  create mode 100644 arch/arm/boot/dts/imx28-evk.dts
>>  create mode 100644 arch/arm/boot/dts/imx28.dtsi
>>  create mode 100644 arch/arm/mach-mxs/mach-mxs.c
>>
>> diff --git a/Documentation/devicetree/bindings/arm/fsl.txt
>> b/Documentation/devicetree/bindings/arm/fsl.txt index 54bddda..9f21faf
>> 100644
>> --- a/Documentation/devicetree/bindings/arm/fsl.txt
>> +++ b/Documentation/devicetree/bindings/arm/fsl.txt
>> @@ -1,6 +1,10 @@
>>  Freescale i.MX Platforms Device Tree Bindings
>>  -----------------------------------------------
>>
>> +i.MX28 Evaluation Kit
>> +Required root node properties:
>> +    - compatible = "fsl,imx28-evk", "fsl,imx28";
>> +
>>  i.MX51 Babbage Board
>>  Required root node properties:
>>      - compatible = "fsl,imx51-babbage", "fsl,imx51";
>> diff --git a/arch/arm/boot/dts/imx28-evk.dts
>> b/arch/arm/boot/dts/imx28-evk.dts new file mode 100644
>> index 0000000..5402495
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/imx28-evk.dts
>> @@ -0,0 +1,35 @@
>> +/*
>> + * Copyright 2012 Freescale Semiconductor, Inc.
>> + *
>> + * The code contained herein is licensed under the GNU General Public
>> + * License. You may obtain a copy of the GNU General Public License
>> + * Version 2 or later at the following locations:
>> + *
>> + * http://www.opensource.org/licenses/gpl-license.html
>> + * http://www.gnu.org/copyleft/gpl.html
>> + */
>> +
>> +/dts-v1/;
>> +/include/ "imx28.dtsi"
>> +
>> +/ {
>> +     model = "Freescale i.MX28 Evaluation Kit";
>> +     compatible = "fsl,imx28-evk", "fsl,imx28";
>> +
>> +     memory {
>> +             device_type = "memory";
>> +             reg = <0x40000000 0x08000000>;
>> +     };
>> +
>> +     ahb@80080000 {
>> +             ethernet@800f0000 {
>
> fec@... would be more readable, but I think this was decided before to be like
> this?
>
Yes.

>> +                     phy-mode = "rmii";
>> +                     status = "okay";
>> +             };
>> +
>
> [...]
>
>> diff --git a/arch/arm/mach-mxs/Makefile b/arch/arm/mach-mxs/Makefile
>> index 908bf9a..8328c45 100644
>> --- a/arch/arm/mach-mxs/Makefile
>> +++ b/arch/arm/mach-mxs/Makefile
>> @@ -7,6 +7,7 @@ obj-$(CONFIG_PM) += pm.o
>>  obj-$(CONFIG_SOC_IMX23) += clock-mx23.o
>>  obj-$(CONFIG_SOC_IMX28) += clock-mx28.o
>>
>> +obj-$(CONFIG_MACH_MXS_DT) += mach-mxs.o
>>  obj-$(CONFIG_MACH_STMP378X_DEVB) += mach-stmp378x_devb.o
>>  obj-$(CONFIG_MACH_MX23EVK) += mach-mx23evk.o
>>  obj-$(CONFIG_MACH_MX28EVK) += mach-mx28evk.o
>> diff --git a/arch/arm/mach-mxs/clock-mx28.c
>> b/arch/arm/mach-mxs/clock-mx28.c index 5d68e41..88ed30c 100644
>> --- a/arch/arm/mach-mxs/clock-mx28.c
>> +++ b/arch/arm/mach-mxs/clock-mx28.c
>> @@ -671,6 +671,10 @@ static struct clk_lookup lookups[] = {
>>       _REGISTER_CLOCK("imx28-fb", NULL, lcdif_clk)
>>       _REGISTER_CLOCK("mxs-saif.0", NULL, saif0_clk)
>>       _REGISTER_CLOCK("mxs-saif.1", NULL, saif1_clk)
>> +     /* for DT */
>> +     _REGISTER_CLOCK("80074000.serial", NULL, uart_clk)
>> +     _REGISTER_CLOCK("800f0000.ethernet", NULL, fec_clk)
>> +     _REGISTER_CLOCK("800f4000.ethernet", NULL, fec_clk)
>
> Wasn't the DT stuff supposed to be more symbolic? Aka. this seems weird.
>
Sorry, i'm not quite understand.
What's your suggestion to change?

Regards
Dong Aisheng
Grant Likely - March 24, 2012, 7:01 p.m.
On Fri, 23 Mar 2012 15:43:54 +0100, Marek Vasut <marek.vasut@gmail.com> wrote:
> Dear Dong Aisheng,
> 
> > From: Dong Aisheng <dong.aisheng@linaro.org>
> > 
> > This patch includes basic dt support which can boot via nfs rootfs.
> > 
> > Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
> > ---
> > ChangeLog v1->v2:
> >  * Some fixes addressed Rob's review comments.
> >    Remove using of OF_DEV_AUXDATA.
> >  * Remove mac address from dts file
> >    Currently we use the mac address got from uboot to work.
> >    Will submit a p separate atch using prom_update_property to fix this
> >    issue for driver based on suggestions from Grant and Lothar.
> >  * rename mxs-dt.c to mach-mxs.c which is supposed to support mx23 dt
> >    too in the future.
> >  * add compatible string "fsl,imx28" per Sascha's suggestion
> >  * add more devices in dtsi file
> >    For those devices still not in use, set the state to "disabled"
> >    by default.
> > 
> > For other patches i sent with this in the first series like mmc and sdma
> > dt support, i will send out them separately since this patch does not
> > depend on them and does not block you to run dt via nfs rootfs.
> > ---
> >  Documentation/devicetree/bindings/arm/fsl.txt |    4 +
> >  arch/arm/boot/dts/imx28-evk.dts               |   35 +++
> 
> Isn't this supposed to be "mx28evk.dts"?
> 
> >  arch/arm/boot/dts/imx28.dtsi                  |  358
> > +++++++++++++++++++++++++ arch/arm/mach-mxs/Kconfig                     | 
> >   8 +
> >  arch/arm/mach-mxs/Makefile                    |    1 +
> >  arch/arm/mach-mxs/clock-mx28.c                |    4 +
> >  arch/arm/mach-mxs/mach-mxs.c                  |   69 +++++
> >  7 files changed, 479 insertions(+), 0 deletions(-)
> >  create mode 100644 arch/arm/boot/dts/imx28-evk.dts
> >  create mode 100644 arch/arm/boot/dts/imx28.dtsi
> >  create mode 100644 arch/arm/mach-mxs/mach-mxs.c
> > 
> > diff --git a/Documentation/devicetree/bindings/arm/fsl.txt
> > b/Documentation/devicetree/bindings/arm/fsl.txt index 54bddda..9f21faf
> > 100644
> > --- a/Documentation/devicetree/bindings/arm/fsl.txt
> > +++ b/Documentation/devicetree/bindings/arm/fsl.txt
> > @@ -1,6 +1,10 @@
> >  Freescale i.MX Platforms Device Tree Bindings
> >  -----------------------------------------------
> > 
> > +i.MX28 Evaluation Kit
> > +Required root node properties:
> > +    - compatible = "fsl,imx28-evk", "fsl,imx28";
> > +
> >  i.MX51 Babbage Board
> >  Required root node properties:
> >      - compatible = "fsl,imx51-babbage", "fsl,imx51";
> > diff --git a/arch/arm/boot/dts/imx28-evk.dts
> > b/arch/arm/boot/dts/imx28-evk.dts new file mode 100644
> > index 0000000..5402495
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/imx28-evk.dts
> > @@ -0,0 +1,35 @@
> > +/*
> > + * Copyright 2012 Freescale Semiconductor, Inc.
> > + *
> > + * The code contained herein is licensed under the GNU General Public
> > + * License. You may obtain a copy of the GNU General Public License
> > + * Version 2 or later at the following locations:
> > + *
> > + * http://www.opensource.org/licenses/gpl-license.html
> > + * http://www.gnu.org/copyleft/gpl.html
> > + */
> > +
> > +/dts-v1/;
> > +/include/ "imx28.dtsi"
> > +
> > +/ {
> > +	model = "Freescale i.MX28 Evaluation Kit";
> > +	compatible = "fsl,imx28-evk", "fsl,imx28";
> > +
> > +	memory {
> > +		device_type = "memory";
> > +		reg = <0x40000000 0x08000000>;
> > +	};
> > +
> > +	ahb@80080000 {
> > +		ethernet@800f0000 {
> 
> fec@... would be more readable, but I think this was decided before to be like 
> this?

ethernet@... is the correct naming.

> 
> > +			phy-mode = "rmii";
> > +			status = "okay";
> > +		};
> > +
> 
> [...]
> 
> > diff --git a/arch/arm/mach-mxs/Makefile b/arch/arm/mach-mxs/Makefile
> > index 908bf9a..8328c45 100644
> > --- a/arch/arm/mach-mxs/Makefile
> > +++ b/arch/arm/mach-mxs/Makefile
> > @@ -7,6 +7,7 @@ obj-$(CONFIG_PM) += pm.o
> >  obj-$(CONFIG_SOC_IMX23) += clock-mx23.o
> >  obj-$(CONFIG_SOC_IMX28) += clock-mx28.o
> > 
> > +obj-$(CONFIG_MACH_MXS_DT) += mach-mxs.o
> >  obj-$(CONFIG_MACH_STMP378X_DEVB) += mach-stmp378x_devb.o
> >  obj-$(CONFIG_MACH_MX23EVK) += mach-mx23evk.o
> >  obj-$(CONFIG_MACH_MX28EVK) += mach-mx28evk.o
> > diff --git a/arch/arm/mach-mxs/clock-mx28.c
> > b/arch/arm/mach-mxs/clock-mx28.c index 5d68e41..88ed30c 100644
> > --- a/arch/arm/mach-mxs/clock-mx28.c
> > +++ b/arch/arm/mach-mxs/clock-mx28.c
> > @@ -671,6 +671,10 @@ static struct clk_lookup lookups[] = {
> >  	_REGISTER_CLOCK("imx28-fb", NULL, lcdif_clk)
> >  	_REGISTER_CLOCK("mxs-saif.0", NULL, saif0_clk)
> >  	_REGISTER_CLOCK("mxs-saif.1", NULL, saif1_clk)
> > +	/* for DT */
> > +	_REGISTER_CLOCK("80074000.serial", NULL, uart_clk)
> > +	_REGISTER_CLOCK("800f0000.ethernet", NULL, fec_clk)
> > +	_REGISTER_CLOCK("800f4000.ethernet", NULL, fec_clk)
> 
> Wasn't the DT stuff supposed to be more symbolic? Aka. this seems weird.

Indeed.  It is a symptom of the common clock and DT clock bindings not
being merged yet.  Expect this to be able to be removed in a couple of
kernel releases.

g.

Patch

diff --git a/Documentation/devicetree/bindings/arm/fsl.txt b/Documentation/devicetree/bindings/arm/fsl.txt
index 54bddda..9f21faf 100644
--- a/Documentation/devicetree/bindings/arm/fsl.txt
+++ b/Documentation/devicetree/bindings/arm/fsl.txt
@@ -1,6 +1,10 @@ 
 Freescale i.MX Platforms Device Tree Bindings
 -----------------------------------------------
 
+i.MX28 Evaluation Kit
+Required root node properties:
+    - compatible = "fsl,imx28-evk", "fsl,imx28";
+
 i.MX51 Babbage Board
 Required root node properties:
     - compatible = "fsl,imx51-babbage", "fsl,imx51";
diff --git a/arch/arm/boot/dts/imx28-evk.dts b/arch/arm/boot/dts/imx28-evk.dts
new file mode 100644
index 0000000..5402495
--- /dev/null
+++ b/arch/arm/boot/dts/imx28-evk.dts
@@ -0,0 +1,35 @@ 
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/dts-v1/;
+/include/ "imx28.dtsi"
+
+/ {
+	model = "Freescale i.MX28 Evaluation Kit";
+	compatible = "fsl,imx28-evk", "fsl,imx28";
+
+	memory {
+		device_type = "memory";
+		reg = <0x40000000 0x08000000>;
+	};
+
+	ahb@80080000 {
+		ethernet@800f0000 {
+			phy-mode = "rmii";
+			status = "okay";
+		};
+
+		ethernet@800f4000 {
+			phy-mode = "rmii";
+			status = "okay";
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/imx28.dtsi b/arch/arm/boot/dts/imx28.dtsi
new file mode 100644
index 0000000..9152354
--- /dev/null
+++ b/arch/arm/boot/dts/imx28.dtsi
@@ -0,0 +1,358 @@ 
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/include/ "skeleton.dtsi"
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	interrupt-parent = <&icoll>;
+
+	aliases {
+		serial0 = &duart;
+	};
+
+	cpus {
+		cpu@0 {
+			compatible = "arm,arm926ejs";
+		};
+	};
+
+	apb@80000000 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0x80000000 0x80000>;
+		ranges;
+
+		apbh@80000000 {
+			compatible = "simple-bus";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			reg = <0x80000000 0x3c900>;
+			ranges;
+
+			icoll: interrupt-controller@80000000 {
+				compatible = "fsl,imx28-icoll";
+				interrupt-controller;
+				#interrupt-cells = <1>;
+				reg = <0x80000000 0x2000>;
+			};
+
+			hsadc@80002000 {
+				reg = <0x80002000 2000>;
+				interrupts = <13 87>;
+				status = "disabled";
+			};
+
+			dma-apbh@80004000 {
+				reg = <0x80004000 2000>;
+				status = "disabled";
+			};
+
+			perfmon@80006000 {
+				reg = <0x80006000 800>;
+				interrupts = <27>;
+				status = "disabled";
+			};
+
+			bch@8000a000 {
+				reg = <0x8000a000 2000>;
+				interrupts = <41>;
+				status = "disabled";
+			};
+
+			gpmi@8000c000 {
+				reg = <0x8000c000 2000>;
+				interrupts = <42 88>;
+				status = "disabled";
+			};
+
+			ssp@80010000 {
+				reg = <0x80010000 2000>;
+				interrupts = <96 82>;
+				status = "disabled";
+			};
+
+			ssp@80012000 {
+				reg = <0x80012000 2000>;
+				interrupts = <97 83>;
+				status = "disabled";
+			};
+
+			ssp@80014000 {
+				reg = <0x80014000 2000>;
+				interrupts = <98 84>;
+				status = "disabled";
+			};
+
+			ssp@80016000 {
+				reg = <0x80016000 2000>;
+				interrupts = <99 85>;
+				status = "disabled";
+			};
+
+			pinctrl@80018000 {
+				reg = <0x80018000 2000>;
+				status = "disabled";
+			};
+
+			digctl@8001c000 {
+				reg = <0x8001c000 2000>;
+				interrupts = <89>;
+				status = "disabled";
+			};
+
+			etm@80022000 {
+				reg = <0x80022000 2000>;
+				status = "disabled";
+			};
+
+			dma-apbx@80024000 {
+				reg = <0x80024000 2000>;
+				status = "disabled";
+			};
+
+			dcp@80028000 {
+				reg = <0x80028000 2000>;
+				interrupts = <52 53 54>;
+				status = "disabled";
+			};
+
+			pxp@8002a000 {
+				reg = <0x8002a000 2000>;
+				interrupts = <39>;
+				status = "disabled";
+			};
+
+			ocotp@8002c000 {
+				reg = <0x8002c000 2000>;
+				status = "disabled";
+			};
+
+			axi-ahb@8002e000 {
+				reg = <0x8002e000 2000>;
+				status = "disabled";
+			};
+
+			lcdif@80030000 {
+				reg = <0x80030000 2000>;
+				interrupts = <38 86>;
+				status = "disabled";
+			};
+
+			can@80032000 {
+				reg = <0x80032000 2000>;
+				interrupts = <8>;
+				status = "disabled";
+			};
+
+			can@80034000 {
+				reg = <0x80034000 2000>;
+				interrupts = <9>;
+				status = "disabled";
+			};
+
+			simdbg@8003c000 {
+				reg = <0x8003c000 200>;
+				status = "disabled";
+			};
+
+			simgpmisel@8003c200 {
+				reg = <0x8003c200 100>;
+				status = "disabled";
+			};
+
+			simsspsel@8003c300 {
+				reg = <0x8003c300 100>;
+				status = "disabled";
+			};
+
+			simmemsel@8003c400 {
+				reg = <0x8003c400 100>;
+				status = "disabled";
+			};
+
+			gpiomon@8003c500 {
+				reg = <0x8003c500 100>;
+				status = "disabled";
+			};
+
+			simenet@8003c700 {
+				reg = <0x8003c700 100>;
+				status = "disabled";
+			};
+
+			armjtag@8003c800 {
+				reg = <0x8003c800 100>;
+				status = "disabled";
+			};
+                };
+
+		apbx@80040000 {
+			compatible = "simple-bus";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			reg = <0x80040000 0x40000>;
+			ranges;
+
+			clkctl@80040000 {
+				reg = <0x80040000 2000>;
+				status = "disabled";
+			};
+
+			saif@80042000 {
+				reg = <0x80042000 2000>;
+				interrupts = <59 80>;
+				status = "disabled";
+			};
+
+			power@80044000 {
+				reg = <0x80044000 2000>;
+				status = "disabled";
+			};
+
+			saif@80046000 {
+				reg = <0x80046000 2000>;
+				interrupts = <58 81>;
+				status = "disabled";
+			};
+
+			lradc@80050000 {
+				reg = <0x80050000 2000>;
+				status = "disabled";
+			};
+
+			spdif@80054000 {
+				reg = <0x80054000 2000>;
+				interrupts = <45 66>;
+				status = "disabled";
+			};
+
+			rtc@80056000 {
+				reg = <0x80056000 2000>;
+				interrupts = <28 29>;
+				status = "disabled";
+			};
+
+			i2c@80058000 {
+				reg = <0x80058000 2000>;
+				interrupts = <111 68>;
+				status = "disabled";
+			};
+
+			i2c@8005a000 {
+				reg = <0x8005a000 2000>;
+				interrupts = <110 69>;
+				status = "disabled";
+			};
+
+			pwm@80064000 {
+				reg = <0x80064000 2000>;
+				status = "disabled";
+			};
+
+			timrot@80068000 {
+				reg = <0x80068000 2000>;
+				status = "disabled";
+			};
+
+			serial@8006a000 {
+				reg = <0x8006a000 0x2000>;
+				interrupts = <112 70 71>;
+				status = "disabled";
+			};
+
+			serial@8006c000 {
+				reg = <0x8006c000 0x2000>;
+				interrupts = <113 72 73>;
+				status = "disabled";
+			};
+
+			serial@8006e000 {
+				reg = <0x8006e000 0x2000>;
+				interrupts = <114 74 75>;
+				status = "disabled";
+			};
+
+			serial@80070000 {
+				reg = <0x80070000 0x2000>;
+				interrupts = <115 76 77>;
+				status = "disabled";
+			};
+
+			serial@80072000 {
+				reg = <0x80072000 0x2000>;
+				interrupts = <116 78 79>;
+				status = "disabled";
+			};
+
+			duart: serial@80074000 {
+				compatible = "arm,pl011", "arm,primecell";
+				reg = <0x80074000 0x1000>;
+				interrupts = <47>;
+			};
+
+			usbphy@8007c000 {
+				reg = <0x8007c000 0x2000>;
+				status = "disabled";
+			};
+
+			usbphy@8007e000 {
+				reg = <0x8007e000 0x2000>;
+				status = "disabled";
+			};
+		};
+	};
+
+	ahb@80080000 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0x80080000 0x80000>;
+		ranges;
+
+		usbctrl@80080000 {
+			reg = <0x80080000 0x10000>;
+			status = "disabled";
+		};
+
+		usbctrl@80090000 {
+			reg = <0x80090000 0x10000>;
+			status = "disabled";
+		};
+
+		dflpt@800c0000 {
+			reg = <0x800c0000 0x10000>;
+			status = "disabled";
+		};
+
+		ethernet@800f0000 {
+			compatible = "fsl,imx28-fec";
+			reg = <0x800f0000 0x4000>;
+			interrupts = <101>;
+			status = "disabled";
+		};
+
+		ethernet@800f4000 {
+			compatible = "fsl,imx28-fec";
+			reg = <0x800f4000 0x4000>;
+			interrupts = <102>;
+			status = "disabled";
+		};
+
+		switch@800f8000 {
+			reg = <0x800f8000 0x8000>;
+			status = "disabled";
+		};
+
+	};
+};
diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
index c57f996..c776aef 100644
--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
@@ -17,6 +17,14 @@  config SOC_IMX28
 
 comment "MXS platforms:"
 
+config MACH_MXS_DT
+	bool "Support MXS platforms from device tree"
+	select SOC_IMX28
+	select USE_OF
+	help
+	  Include support for Freescale MXS platforms(i.MX23 and i.MX28)
+	  using the device tree for discovery
+
 config MACH_STMP378X_DEVB
 	bool "Support STMP378x_devb Platform"
 	select SOC_IMX23
diff --git a/arch/arm/mach-mxs/Makefile b/arch/arm/mach-mxs/Makefile
index 908bf9a..8328c45 100644
--- a/arch/arm/mach-mxs/Makefile
+++ b/arch/arm/mach-mxs/Makefile
@@ -7,6 +7,7 @@  obj-$(CONFIG_PM) += pm.o
 obj-$(CONFIG_SOC_IMX23) += clock-mx23.o
 obj-$(CONFIG_SOC_IMX28) += clock-mx28.o
 
+obj-$(CONFIG_MACH_MXS_DT) += mach-mxs.o
 obj-$(CONFIG_MACH_STMP378X_DEVB) += mach-stmp378x_devb.o
 obj-$(CONFIG_MACH_MX23EVK) += mach-mx23evk.o
 obj-$(CONFIG_MACH_MX28EVK) += mach-mx28evk.o
diff --git a/arch/arm/mach-mxs/clock-mx28.c b/arch/arm/mach-mxs/clock-mx28.c
index 5d68e41..88ed30c 100644
--- a/arch/arm/mach-mxs/clock-mx28.c
+++ b/arch/arm/mach-mxs/clock-mx28.c
@@ -671,6 +671,10 @@  static struct clk_lookup lookups[] = {
 	_REGISTER_CLOCK("imx28-fb", NULL, lcdif_clk)
 	_REGISTER_CLOCK("mxs-saif.0", NULL, saif0_clk)
 	_REGISTER_CLOCK("mxs-saif.1", NULL, saif1_clk)
+	/* for DT */
+	_REGISTER_CLOCK("80074000.serial", NULL, uart_clk)
+	_REGISTER_CLOCK("800f0000.ethernet", NULL, fec_clk)
+	_REGISTER_CLOCK("800f4000.ethernet", NULL, fec_clk)
 };
 
 static int clk_misc_init(void)
diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c
new file mode 100644
index 0000000..6d1e331
--- /dev/null
+++ b/arch/arm/mach-mxs/mach-mxs.c
@@ -0,0 +1,69 @@ 
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright 2012 Linaro Ltd.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/init.h>
+#include <linux/irqdomain.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <mach/common.h>
+#include <mach/mx28.h>
+
+static int __init imx28_icoll_add_irq_domain(struct device_node *np,
+				struct device_node *interrupt_parent)
+{
+	irq_domain_add_simple(np, 0);
+
+	return 0;
+}
+
+static const struct of_device_id mxs_irq_match[] __initconst = {
+	{ .compatible = "fsl,imx28-icoll", .data = imx28_icoll_add_irq_domain, },
+	{ /* sentinel */ }
+};
+
+static void __init mxs_dt_init_irq(void)
+{
+	icoll_init_irq();
+	of_irq_init(mxs_irq_match);
+}
+
+static void __init imx28_timer_init(void)
+{
+	mx28_clocks_init();
+}
+
+static struct sys_timer imx28_timer = {
+	.init = imx28_timer_init,
+};
+
+static void __init imx28_machine_init(void)
+{
+       of_platform_populate(NULL, of_default_bus_match_table,
+		NULL, NULL);
+}
+
+static const char *imx28_dt_compat[] __initdata = {
+	"fsl,imx28",
+	"fsl,imx28-evk",
+	NULL,
+};
+
+DT_MACHINE_START(IMX28, "Freescale i.MX28 (Device Tree)")
+	.map_io		= mx28_map_io,
+	.init_irq	= mxs_dt_init_irq,
+	.timer		= &imx28_timer,
+	.init_machine	= imx28_machine_init,
+	.dt_compat	= imx28_dt_compat,
+	.restart	= mxs_restart,
+MACHINE_END