[v2,14/18] ARM: Add STM32 family machine
diff mbox

Message ID 1424455277-29983-15-git-send-email-mcoquelin.stm32@gmail.com
State New
Headers show

Commit Message

Maxime Coquelin Feb. 20, 2015, 6:01 p.m. UTC
STMicrolectronics's STM32 series is a family of Cortex-M
microcontrollers. It is used in various applications, and
proposes a wide range of peripherals.

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>
---
 Documentation/arm/stm32/overview.txt           | 32 ++++++++++++++++++++++++++
 Documentation/arm/stm32/stm32f429-overview.txt | 22 ++++++++++++++++++
 arch/arm/Kconfig                               | 22 ++++++++++++++++++
 arch/arm/Makefile                              |  1 +
 arch/arm/mach-stm32/Makefile                   |  1 +
 arch/arm/mach-stm32/Makefile.boot              |  0
 arch/arm/mach-stm32/board-dt.c                 | 31 +++++++++++++++++++++++++
 7 files changed, 109 insertions(+)
 create mode 100644 Documentation/arm/stm32/overview.txt
 create mode 100644 Documentation/arm/stm32/stm32f429-overview.txt
 create mode 100644 arch/arm/mach-stm32/Makefile
 create mode 100644 arch/arm/mach-stm32/Makefile.boot
 create mode 100644 arch/arm/mach-stm32/board-dt.c

Comments

Uwe Kleine-König Feb. 20, 2015, 8 p.m. UTC | #1
Hello,

On Fri, Feb 20, 2015 at 07:01:13PM +0100, Maxime Coquelin wrote:
> STMicrolectronics's STM32 series is a family of Cortex-M
> microcontrollers. It is used in various applications, and
> proposes a wide range of peripherals.
> 
> Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>
> ---
>  Documentation/arm/stm32/overview.txt           | 32 ++++++++++++++++++++++++++
>  Documentation/arm/stm32/stm32f429-overview.txt | 22 ++++++++++++++++++
>  arch/arm/Kconfig                               | 22 ++++++++++++++++++
>  arch/arm/Makefile                              |  1 +
>  arch/arm/mach-stm32/Makefile                   |  1 +
>  arch/arm/mach-stm32/Makefile.boot              |  0
>  arch/arm/mach-stm32/board-dt.c                 | 31 +++++++++++++++++++++++++
>  7 files changed, 109 insertions(+)
>  create mode 100644 Documentation/arm/stm32/overview.txt
>  create mode 100644 Documentation/arm/stm32/stm32f429-overview.txt
>  create mode 100644 arch/arm/mach-stm32/Makefile
>  create mode 100644 arch/arm/mach-stm32/Makefile.boot
>  create mode 100644 arch/arm/mach-stm32/board-dt.c
> 
> diff --git a/Documentation/arm/stm32/overview.txt b/Documentation/arm/stm32/overview.txt
> new file mode 100644
> index 0000000..d8bf6bb
> --- /dev/null
> +++ b/Documentation/arm/stm32/overview.txt
> @@ -0,0 +1,32 @@
> +			STM32 ARM Linux Overview
> +			==========================
> +
> +Introduction
> +------------
> +
> +  The STMicroelectronics family of Cortex-M based MCUs are supported by the
> +  'STM32' platform of ARM Linux. Currently only the STM32F429 is supported.
> +
> +
> +Configuration
> +-------------
> +
> +  A generic configuration is provided for STM32 family, and can be used as the
> +  default by
> +	make stm32_defconfig
> +
> +Layout
> +------
> +
> +  All the files for multiple machine families are located in the platform code
> +  contained in arch/arm/mach-stm32
> +
> +  There is a generic board board-dt.c in the mach folder which support
> +  Flattened Device Tree, which means, It works with any compatible board with
> +  Device Trees.
> +
> +
> +Document Author
> +---------------
> +
> +  Maxime Coquelin <mcoquelin.stm32@gmail.com>
> diff --git a/Documentation/arm/stm32/stm32f429-overview.txt b/Documentation/arm/stm32/stm32f429-overview.txt
> new file mode 100644
> index 0000000..5206822
> --- /dev/null
> +++ b/Documentation/arm/stm32/stm32f429-overview.txt
> @@ -0,0 +1,22 @@
> +			STM32F429 Overview
> +			==================
> +
> +  Introduction
> +  ------------
> +	The STM32F429 is a Cortex-M4 MCU aimed at various applications.
> +	It features:
> +	- ARM Cortex-M4 up to 180MHz with FPU
> +	- 2MB internal Flash Memory
> +	- External memory support through FMC controller (PSRAM, SDRAM, NOR, NAND)
> +	- I2C, SPI, SAI, CAN, USB OTG, Ethernet controllers
> +	- LCD controller & Camera interface
> +	- Cryptographic processor
> +
> +  Resources
> +  ---------
> +	Datasheet and reference manual are publicly available on ST website:
> +	- http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1577/LN1806?ecmp=stm32f429-439_pron_pr-ces2014_nov2013
> +
> +  Document Author
> +  ---------------
> +	Maxime Coquelin <mcoquelin.stm32@gmail.com>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 97d07ed..cfd9532 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -774,6 +774,28 @@ config ARCH_OMAP1
>  	help
>  	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
>  
> +config ARCH_STM32
> +	bool "STMicrolectronics STM32"
> +	depends on !MMU
> +	select ARCH_REQUIRE_GPIOLIB
> +	select ARM_NVIC
> +	select AUTO_ZRELADDR
> +	select ARCH_HAS_RESET_CONTROLLER
> +	select RESET_CONTROLLER
> +	select PINCTRL
> +	select PINCTRL_STM32
> +	select CLKSRC_OF
> +	select ARMV7M_SYSTICK
> +	select COMMON_CLK
> +	select CPU_V7M
> +	select GENERIC_CLOCKEVENTS
> +	select NO_DMA
> +	select NO_IOPORT_MAP
> +	select SPARSE_IRQ
> +	select USE_OF
Please sort this list alphabetically.

> +	help
> +	  Support for STMicorelectronics STM32 processors.
> +
>  endchoice
>  
>  menu "Multiple platform selection"
> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> index c1785ee..7d00659 100644
> --- a/arch/arm/Makefile
> +++ b/arch/arm/Makefile
> @@ -196,6 +196,7 @@ machine-$(CONFIG_ARCH_SHMOBILE) 	+= shmobile
>  machine-$(CONFIG_ARCH_SIRF)		+= prima2
>  machine-$(CONFIG_ARCH_SOCFPGA)		+= socfpga
>  machine-$(CONFIG_ARCH_STI)		+= sti
> +machine-$(CONFIG_ARCH_STM32)		+= stm32
>  machine-$(CONFIG_ARCH_SUNXI)		+= sunxi
>  machine-$(CONFIG_ARCH_TEGRA)		+= tegra
>  machine-$(CONFIG_ARCH_U300)		+= u300
> diff --git a/arch/arm/mach-stm32/Makefile b/arch/arm/mach-stm32/Makefile
> new file mode 100644
> index 0000000..bd0b7b5
> --- /dev/null
> +++ b/arch/arm/mach-stm32/Makefile
> @@ -0,0 +1 @@
> +obj-y += board-dt.o
> diff --git a/arch/arm/mach-stm32/Makefile.boot b/arch/arm/mach-stm32/Makefile.boot
> new file mode 100644
> index 0000000..e69de29
Maybe note there why this file exists and can be empty. Feel free to
copy the content of efm32's Makefile.boot.

> diff --git a/arch/arm/mach-stm32/board-dt.c b/arch/arm/mach-stm32/board-dt.c
> new file mode 100644
> index 0000000..1d681b3
> --- /dev/null
> +++ b/arch/arm/mach-stm32/board-dt.c
> @@ -0,0 +1,31 @@
> +/*
> + * Copyright (C) Maxime Coquelin 2015
> + * Author:  Maxime Coquelin <mcoquelin.stm32@gmail.com>
> + * License terms:  GNU General Public License (GPL), version 2
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/clk-provider.h>
> +#include <linux/clocksource.h>
> +#include <linux/reset-controller.h>
> +#include <asm/v7m.h>
> +#include <asm/mach/arch.h>
> +
> +static const char *const stm32_compat[] __initconst = {
> +	"st,stm32f429",
> +	NULL
> +};
> +
> +static void __init stm32_timer_init(void)
> +{
> +	of_clk_init(NULL);
> +	reset_controller_of_init();
> +	clocksource_of_init();
Hmm, if reset_controller_of_init was called automatically you wouldn't
need that, right? Maybe arange for that instead?

Best regards
Uwe
Paul Bolle Feb. 20, 2015, 9:37 p.m. UTC | #2
On Fri, 2015-02-20 at 21:00 +0100, Uwe Kleine-König wrote:
> On Fri, Feb 20, 2015 at 07:01:13PM +0100, Maxime Coquelin wrote:
> > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> > index 97d07ed..cfd9532 100644
> > --- a/arch/arm/Kconfig
> > +++ b/arch/arm/Kconfig
> > @@ -774,6 +774,28 @@ config ARCH_OMAP1
> >  	help
> >  	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
> >  
> > +config ARCH_STM32
> > +	bool "STMicrolectronics STM32"
> > +	depends on !MMU
> > +	select ARCH_REQUIRE_GPIOLIB
> > +	select ARM_NVIC
> > +	select AUTO_ZRELADDR
> > +	select ARCH_HAS_RESET_CONTROLLER
> > +	select RESET_CONTROLLER
> > +	select PINCTRL
> > +	select PINCTRL_STM32
> > +	select CLKSRC_OF
> > +	select ARMV7M_SYSTICK
> > +	select COMMON_CLK
> > +	select CPU_V7M
> > +	select GENERIC_CLOCKEVENTS
> > +	select NO_DMA
> > +	select NO_IOPORT_MAP
> > +	select SPARSE_IRQ
> > +	select USE_OF
> Please sort this list alphabetically.

And drop
    select NO_DMA

You copied that from ARCH_EFM32, but it's pointless on arm (as arch/arm/
doesn't provide a NO_DMA Kconfig symbol).

I submitted a patch last year to drop it from ARCH_EFM32, which Uwe
Acked, but then nothing happened. I'm to blame, as I should have sent a
reminder.

> > +	help
> > +	  Support for STMicorelectronics STM32 processors.
> > +
> >  endchoice
> >  
> >  menu "Multiple platform selection"


Paul Bolle

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Maxime Coquelin Feb. 25, 2015, 12:03 p.m. UTC | #3
2015-02-20 21:00 GMT+01:00 Uwe Kleine-König <u.kleine-koenig@pengutronix.de>:
> Hello,
>
> On Fri, Feb 20, 2015 at 07:01:13PM +0100, Maxime Coquelin wrote:
>> STMicrolectronics's STM32 series is a family of Cortex-M
>> microcontrollers. It is used in various applications, and
>> proposes a wide range of peripherals.
>>
>> Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>
>> ---
>>  Documentation/arm/stm32/overview.txt           | 32 ++++++++++++++++++++++++++
>>  Documentation/arm/stm32/stm32f429-overview.txt | 22 ++++++++++++++++++
>>  arch/arm/Kconfig                               | 22 ++++++++++++++++++
>>  arch/arm/Makefile                              |  1 +
>>  arch/arm/mach-stm32/Makefile                   |  1 +
>>  arch/arm/mach-stm32/Makefile.boot              |  0
>>  arch/arm/mach-stm32/board-dt.c                 | 31 +++++++++++++++++++++++++
>>  7 files changed, 109 insertions(+)
>>  create mode 100644 Documentation/arm/stm32/overview.txt
>>  create mode 100644 Documentation/arm/stm32/stm32f429-overview.txt
>>  create mode 100644 arch/arm/mach-stm32/Makefile
>>  create mode 100644 arch/arm/mach-stm32/Makefile.boot
>>  create mode 100644 arch/arm/mach-stm32/board-dt.c
>>

<snip>

>> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
>> index 97d07ed..cfd9532 100644
>> --- a/arch/arm/Kconfig
>> +++ b/arch/arm/Kconfig
>> @@ -774,6 +774,28 @@ config ARCH_OMAP1
>>       help
>>         Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
>>
>> +config ARCH_STM32
>> +     bool "STMicrolectronics STM32"
>> +     depends on !MMU
>> +     select ARCH_REQUIRE_GPIOLIB
>> +     select ARM_NVIC
>> +     select AUTO_ZRELADDR
>> +     select ARCH_HAS_RESET_CONTROLLER
>> +     select RESET_CONTROLLER
>> +     select PINCTRL
>> +     select PINCTRL_STM32
>> +     select CLKSRC_OF
>> +     select ARMV7M_SYSTICK
>> +     select COMMON_CLK
>> +     select CPU_V7M
>> +     select GENERIC_CLOCKEVENTS
>> +     select NO_DMA
>> +     select NO_IOPORT_MAP
>> +     select SPARSE_IRQ
>> +     select USE_OF
> Please sort this list alphabetically.

Ok, I will do for v3.

>
>> +     help
>> +       Support for STMicorelectronics STM32 processors.
>> +
>>  endchoice
>>
>>  menu "Multiple platform selection"
>> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
>> index c1785ee..7d00659 100644
>> --- a/arch/arm/Makefile
>> +++ b/arch/arm/Makefile
>> @@ -196,6 +196,7 @@ machine-$(CONFIG_ARCH_SHMOBILE)   += shmobile
>>  machine-$(CONFIG_ARCH_SIRF)          += prima2
>>  machine-$(CONFIG_ARCH_SOCFPGA)               += socfpga
>>  machine-$(CONFIG_ARCH_STI)           += sti
>> +machine-$(CONFIG_ARCH_STM32)         += stm32
>>  machine-$(CONFIG_ARCH_SUNXI)         += sunxi
>>  machine-$(CONFIG_ARCH_TEGRA)         += tegra
>>  machine-$(CONFIG_ARCH_U300)          += u300
>> diff --git a/arch/arm/mach-stm32/Makefile b/arch/arm/mach-stm32/Makefile
>> new file mode 100644
>> index 0000000..bd0b7b5
>> --- /dev/null
>> +++ b/arch/arm/mach-stm32/Makefile
>> @@ -0,0 +1 @@
>> +obj-y += board-dt.o
>> diff --git a/arch/arm/mach-stm32/Makefile.boot b/arch/arm/mach-stm32/Makefile.boot
>> new file mode 100644
>> index 0000000..e69de29
> Maybe note there why this file exists and can be empty. Feel free to
> copy the content of efm32's Makefile.boot.

Ok, I will copy efm32's Makefile.boot content.
Do you know why your patch has not been applied yet?

>
>> diff --git a/arch/arm/mach-stm32/board-dt.c b/arch/arm/mach-stm32/board-dt.c
>> new file mode 100644
>> index 0000000..1d681b3
>> --- /dev/null
>> +++ b/arch/arm/mach-stm32/board-dt.c
>> @@ -0,0 +1,31 @@
>> +/*
>> + * Copyright (C) Maxime Coquelin 2015
>> + * Author:  Maxime Coquelin <mcoquelin.stm32@gmail.com>
>> + * License terms:  GNU General Public License (GPL), version 2
>> + */
>> +
>> +#include <linux/kernel.h>
>> +#include <linux/clk-provider.h>
>> +#include <linux/clocksource.h>
>> +#include <linux/reset-controller.h>
>> +#include <asm/v7m.h>
>> +#include <asm/mach/arch.h>
>> +
>> +static const char *const stm32_compat[] __initconst = {
>> +     "st,stm32f429",
>> +     NULL
>> +};
>> +
>> +static void __init stm32_timer_init(void)
>> +{
>> +     of_clk_init(NULL);
>> +     reset_controller_of_init();
>> +     clocksource_of_init();
> Hmm, if reset_controller_of_init was called automatically you wouldn't
> need that, right? Maybe arange for that instead?

This is what I did in the v1:
http://marc.info/?l=linux-arm-kernel&m=142376341008550&w=2

But Rob advised to put it elsewhere.

Thanks,
Maxime

>
> Best regards
> Uwe
>
> --
> Pengutronix e.K.                           | Uwe Kleine-König            |
> Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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Maxime Coquelin Feb. 25, 2015, 12:04 p.m. UTC | #4
2015-02-20 22:37 GMT+01:00 Paul Bolle <pebolle@tiscali.nl>:
> On Fri, 2015-02-20 at 21:00 +0100, Uwe Kleine-König wrote:
>> On Fri, Feb 20, 2015 at 07:01:13PM +0100, Maxime Coquelin wrote:
>> > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
>> > index 97d07ed..cfd9532 100644
>> > --- a/arch/arm/Kconfig
>> > +++ b/arch/arm/Kconfig
>> > @@ -774,6 +774,28 @@ config ARCH_OMAP1
>> >     help
>> >       Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
>> >
>> > +config ARCH_STM32
>> > +   bool "STMicrolectronics STM32"
>> > +   depends on !MMU
>> > +   select ARCH_REQUIRE_GPIOLIB
>> > +   select ARM_NVIC
>> > +   select AUTO_ZRELADDR
>> > +   select ARCH_HAS_RESET_CONTROLLER
>> > +   select RESET_CONTROLLER
>> > +   select PINCTRL
>> > +   select PINCTRL_STM32
>> > +   select CLKSRC_OF
>> > +   select ARMV7M_SYSTICK
>> > +   select COMMON_CLK
>> > +   select CPU_V7M
>> > +   select GENERIC_CLOCKEVENTS
>> > +   select NO_DMA
>> > +   select NO_IOPORT_MAP
>> > +   select SPARSE_IRQ
>> > +   select USE_OF
>> Please sort this list alphabetically.
>
> And drop
>     select NO_DMA
>
> You copied that from ARCH_EFM32, but it's pointless on arm (as arch/arm/
> doesn't provide a NO_DMA Kconfig symbol).

You are right, I will drop NO_DMA in v3.

Thanks,
Maxime

>
> I submitted a patch last year to drop it from ARCH_EFM32, which Uwe
> Acked, but then nothing happened. I'm to blame, as I should have sent a
> reminder.
>
>> > +   help
>> > +     Support for STMicorelectronics STM32 processors.
>> > +
>> >  endchoice
>> >
>> >  menu "Multiple platform selection"
>
>
> Paul Bolle
>
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Arnd Bergmann March 10, 2015, 3:10 p.m. UTC | #5
On Friday 20 February 2015 19:01:13 Maxime Coquelin wrote:
> +static void __init stm32_timer_init(void)
> +{
> +       of_clk_init(NULL);
> +       reset_controller_of_init();
> +       clocksource_of_init();
> +
> +}

Don't do that. As I said, I'd rather not introduce reset_controller_of_init()
at all, but if we end up doing it, it should be run by default for
any machine that has an empty timer_init callback.

	Arnd
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Patch
diff mbox

diff --git a/Documentation/arm/stm32/overview.txt b/Documentation/arm/stm32/overview.txt
new file mode 100644
index 0000000..d8bf6bb
--- /dev/null
+++ b/Documentation/arm/stm32/overview.txt
@@ -0,0 +1,32 @@ 
+			STM32 ARM Linux Overview
+			==========================
+
+Introduction
+------------
+
+  The STMicroelectronics family of Cortex-M based MCUs are supported by the
+  'STM32' platform of ARM Linux. Currently only the STM32F429 is supported.
+
+
+Configuration
+-------------
+
+  A generic configuration is provided for STM32 family, and can be used as the
+  default by
+	make stm32_defconfig
+
+Layout
+------
+
+  All the files for multiple machine families are located in the platform code
+  contained in arch/arm/mach-stm32
+
+  There is a generic board board-dt.c in the mach folder which support
+  Flattened Device Tree, which means, It works with any compatible board with
+  Device Trees.
+
+
+Document Author
+---------------
+
+  Maxime Coquelin <mcoquelin.stm32@gmail.com>
diff --git a/Documentation/arm/stm32/stm32f429-overview.txt b/Documentation/arm/stm32/stm32f429-overview.txt
new file mode 100644
index 0000000..5206822
--- /dev/null
+++ b/Documentation/arm/stm32/stm32f429-overview.txt
@@ -0,0 +1,22 @@ 
+			STM32F429 Overview
+			==================
+
+  Introduction
+  ------------
+	The STM32F429 is a Cortex-M4 MCU aimed at various applications.
+	It features:
+	- ARM Cortex-M4 up to 180MHz with FPU
+	- 2MB internal Flash Memory
+	- External memory support through FMC controller (PSRAM, SDRAM, NOR, NAND)
+	- I2C, SPI, SAI, CAN, USB OTG, Ethernet controllers
+	- LCD controller & Camera interface
+	- Cryptographic processor
+
+  Resources
+  ---------
+	Datasheet and reference manual are publicly available on ST website:
+	- http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1577/LN1806?ecmp=stm32f429-439_pron_pr-ces2014_nov2013
+
+  Document Author
+  ---------------
+	Maxime Coquelin <mcoquelin.stm32@gmail.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 97d07ed..cfd9532 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -774,6 +774,28 @@  config ARCH_OMAP1
 	help
 	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
 
+config ARCH_STM32
+	bool "STMicrolectronics STM32"
+	depends on !MMU
+	select ARCH_REQUIRE_GPIOLIB
+	select ARM_NVIC
+	select AUTO_ZRELADDR
+	select ARCH_HAS_RESET_CONTROLLER
+	select RESET_CONTROLLER
+	select PINCTRL
+	select PINCTRL_STM32
+	select CLKSRC_OF
+	select ARMV7M_SYSTICK
+	select COMMON_CLK
+	select CPU_V7M
+	select GENERIC_CLOCKEVENTS
+	select NO_DMA
+	select NO_IOPORT_MAP
+	select SPARSE_IRQ
+	select USE_OF
+	help
+	  Support for STMicorelectronics STM32 processors.
+
 endchoice
 
 menu "Multiple platform selection"
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index c1785ee..7d00659 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -196,6 +196,7 @@  machine-$(CONFIG_ARCH_SHMOBILE) 	+= shmobile
 machine-$(CONFIG_ARCH_SIRF)		+= prima2
 machine-$(CONFIG_ARCH_SOCFPGA)		+= socfpga
 machine-$(CONFIG_ARCH_STI)		+= sti
+machine-$(CONFIG_ARCH_STM32)		+= stm32
 machine-$(CONFIG_ARCH_SUNXI)		+= sunxi
 machine-$(CONFIG_ARCH_TEGRA)		+= tegra
 machine-$(CONFIG_ARCH_U300)		+= u300
diff --git a/arch/arm/mach-stm32/Makefile b/arch/arm/mach-stm32/Makefile
new file mode 100644
index 0000000..bd0b7b5
--- /dev/null
+++ b/arch/arm/mach-stm32/Makefile
@@ -0,0 +1 @@ 
+obj-y += board-dt.o
diff --git a/arch/arm/mach-stm32/Makefile.boot b/arch/arm/mach-stm32/Makefile.boot
new file mode 100644
index 0000000..e69de29
diff --git a/arch/arm/mach-stm32/board-dt.c b/arch/arm/mach-stm32/board-dt.c
new file mode 100644
index 0000000..1d681b3
--- /dev/null
+++ b/arch/arm/mach-stm32/board-dt.c
@@ -0,0 +1,31 @@ 
+/*
+ * Copyright (C) Maxime Coquelin 2015
+ * Author:  Maxime Coquelin <mcoquelin.stm32@gmail.com>
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+
+#include <linux/kernel.h>
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+#include <linux/reset-controller.h>
+#include <asm/v7m.h>
+#include <asm/mach/arch.h>
+
+static const char *const stm32_compat[] __initconst = {
+	"st,stm32f429",
+	NULL
+};
+
+static void __init stm32_timer_init(void)
+{
+	of_clk_init(NULL);
+	reset_controller_of_init();
+	clocksource_of_init();
+
+}
+
+DT_MACHINE_START(STM32DT, "STM32 (Device Tree Support)")
+	.init_time = stm32_timer_init,
+	.dt_compat = stm32_compat,
+	.restart = armv7m_restart,
+MACHINE_END