Subject: [PATCH] ARM: at91/dt: split sam9x5 peripheral definitions

From: [email-masked] (Mike Turquette)
Date: Mon, 19 Aug 2013 15:37:14 -0700

Quoting Nicolas Ferre (2013-08-19 09:23:46)
> On 08/08/2013 17:23, boris brezillon :
> > Hello Jean-Christophe,
> >
> > On 08/08/2013 16:07, Jean-Christophe PLAGNIOL-VILLARD wrote:
> >> On 12:14 Wed 07 Aug     , Boris BREZILLON wrote:
> >>> This patch splits the sam9x5 peripheral definitions into:
> >>> - a common base for all sam9x5 SoCs (at91sam9x5.dtsi)
> >>> - several optional peripheral definitions which will be included by specific
> >>>     sam9x5 SoCs (at91sam9x5_'periph name'.dtsi)
> >>>
> >>> This provides a better representation of the real hardware (drop unneeded
> >>> dt nodes) and avoids future peripheral id conflict (lcdc and isi both use
> >>> peripheral id 25).
> >> I really don't like this
> >>
> >> the mapping is soc specific (here familly) so I does not see any advantage
> >> except move files so NO for me
> > Let me explain in detail why I did that.
> >
> > This separation was part of the "at91 common clk" series and was here to
> > avoid the
> > definition of unavailable clocks or definition of clocks with the same
> > id (which may result
> > in bad clk registration).
> > If we keep all the definitions in one .dtsi file (even the one which are
> > not really available),
> > I may need to add a new property to each peripheral (and system) clk
> > node to specify the
> > availabilty of the clock (something similar to 'status="disabled"' in
> > device nodes).
> 
> This is indeed a pretty good argument.
> I do think that we have to ask Mike Turquette to see if he already has 
> encountered such a case.

It is correct to place chip-specific clocks into a chip-specific dts.
Having clocks marked as "disabled" in a big dtsi is not the right way to
go.

Regarding naming conflicts, is your issue with string name collisions
during calls to __clk_lookup?

Thanks,
Mike

> 
> I must say that I was not in favor for this split because of readability 
> and dts/dtsi file organization (you know, the usual question: where the 
> hell this peripheral property is finally setup?).
> 
> But, if we really have to implement a new kind of property to tell if a 
> clock is actually present or not, I am in favor for reconsidering this 
> solution as it seems quite simple and self-explanatory...
> 
> > As explained to Thomas, I thought device tree was here to give a real
> > description of the
> > hardware parts (in case of sam9x5.dtsi the description of the common
> > parts of sam9x5 SoC
> > family).
> > If you define peripherals that are not present in a SoC (lets say macb0
> > for sam9g15) you break
> > this rule.
> 
> Well, on the other hand, the status says "disabled", so we can imagine 
> that it has been disabled, from its birth, in hardware...
> 
> > I'm not telling I have the right approach here, I'm just trying to
> > understand what should be done and
> > what should not.
> >
> > Finally, I'd like to point that the memory footprint of the dtb file
> > generated after this patch has been
> > applied is bit smaller (even if it won't make a real difference):
> >
> > with this patch:
> >
> > 15937 arch/arm/boot/dts/at91-ariag25.dtb
> > 15860 arch/arm/boot/dts/at91sam9g15ek.dtb
> > 16905 arch/arm/boot/dts/at91sam9g25ek.dtb
> > 16473 arch/arm/boot/dts/at91sam9g35ek.dtb
> > 17341 arch/arm/boot/dts/at91sam9x25ek.dtb
> > 16473 arch/arm/boot/dts/at91sam9x35ek.dtb
> >
> > without this patch:
> >
> > 16077 arch/arm/boot/dts/at91-ariag25.dtb
> > 16824 arch/arm/boot/dts/at91sam9g15ek.dtb
> > 16849 arch/arm/boot/dts/at91sam9g25ek.dtb
> > 16849 arch/arm/boot/dts/at91sam9g35ek.dtb
> > 15017 arch/arm/boot/dts/at91sam9m10g45ek.dtb
> > 17145 arch/arm/boot/dts/at91sam9x25ek.dtb
> > 16849 arch/arm/boot/dts/at91sam9x35ek.dtb
> 
> okay, but difference in size are not impressive. But it is true that:
> - it can grow a little if we switch LCD to full DT
> - each bit saved can have an influence on boot time
> but it will not be a decisive factor.
> 
> 
> >> Best Regards,
> >> J.
> >>> Signed-off-by: Boris BREZILLON <[email-masked]>
> >>> ---
> >>>    arch/arm/boot/dts/at91sam9g25.dtsi       |    2 +
> >>>    arch/arm/boot/dts/at91sam9g35.dtsi       |    1 +
> >>>    arch/arm/boot/dts/at91sam9x25.dtsi       |   24 ++---------
> >>>    arch/arm/boot/dts/at91sam9x35.dtsi       |    1 +
> >>>    arch/arm/boot/dts/at91sam9x5.dtsi        |   67 ------------------------------
> >>>    arch/arm/boot/dts/at91sam9x5_macb0.dtsi  |   56 +++++++++++++++++++++++++
> >>>    arch/arm/boot/dts/at91sam9x5_macb1.dtsi  |   44 ++++++++++++++++++++
> >>>    arch/arm/boot/dts/at91sam9x5_usart3.dtsi |   51 +++++++++++++++++++++++
> >>>    8 files changed, 158 insertions(+), 88 deletions(-)
> >>>    create mode 100644 arch/arm/boot/dts/at91sam9x5_macb0.dtsi
> >>>    create mode 100644 arch/arm/boot/dts/at91sam9x5_macb1.dtsi
> >>>    create mode 100644 arch/arm/boot/dts/at91sam9x5_usart3.dtsi
> >>>
> >>> diff --git a/arch/arm/boot/dts/at91sam9g25.dtsi b/arch/arm/boot/dts/at91sam9g25.dtsi
> >>> index b4ec6fe..17b8799 100644
> >>> --- a/arch/arm/boot/dts/at91sam9g25.dtsi
> >>> +++ b/arch/arm/boot/dts/at91sam9g25.dtsi
> >>> @@ -7,6 +7,8 @@
> >>>     */
> >>>
> >>>    #include "at91sam9x5.dtsi"
> >>> +#include "at91sam9x5_usart3.dtsi"
> >>> +#include "at91sam9x5_macb0.dtsi"
> >>>
> >>>    / {
> >>>     model = "Atmel AT91SAM9G25 SoC";
> >>> diff --git a/arch/arm/boot/dts/at91sam9g35.dtsi b/arch/arm/boot/dts/at91sam9g35.dtsi
> >>> index bebf9f5..e35c2fc 100644
> >>> --- a/arch/arm/boot/dts/at91sam9g35.dtsi
> >>> +++ b/arch/arm/boot/dts/at91sam9g35.dtsi
> >>> @@ -7,6 +7,7 @@
> >>>     */
> >>>
> >>>    #include "at91sam9x5.dtsi"
> >>> +#include "at91sam9x5_macb0.dtsi"
> >>>
> >>>    / {
> >>>     model = "Atmel AT91SAM9G35 SoC";
> >>> diff --git a/arch/arm/boot/dts/at91sam9x25.dtsi b/arch/arm/boot/dts/at91sam9x25.dtsi
> >>> index 49e94ab..c255421 100644
> >>> --- a/arch/arm/boot/dts/at91sam9x25.dtsi
> >>> +++ b/arch/arm/boot/dts/at91sam9x25.dtsi
> >>> @@ -7,6 +7,9 @@
> >>>     */
> >>>
> >>>    #include "at91sam9x5.dtsi"
> >>> +#include "at91sam9x5_usart3.dtsi"
> >>> +#include "at91sam9x5_macb0.dtsi"
> >>> +#include "at91sam9x5_macb1.dtsi"
> >>>
> >>>    / {
> >>>     model = "Atmel AT91SAM9X25 SoC";
> >>> @@ -22,27 +25,6 @@
> >>>                                    0x80000000 0xfffd0000 0xb83fffff  /* pioC */
> >>>                                    0x003fffff 0x003f8000 0x00000000  /* pioD */
> >>>                                   >;
> >>> -
> >>> -                           macb1 {
> >>> -                                   pinctrl_macb1_rmii: macb1_rmii-0 {
> >>> -                                           atmel,pins =
> >>> -                                                   <AT91_PIOC 16 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC16 periph B */
> >>> -                                                    AT91_PIOC 18 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC18 periph B */
> >>> -                                                    AT91_PIOC 19 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC19 periph B */
> >>> -                                                    AT91_PIOC 20 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC20 periph B */
> >>> -                                                    AT91_PIOC 21 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC21 periph B */
> >>> -                                                    AT91_PIOC 27 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC27 periph B */
> >>> -                                                    AT91_PIOC 28 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC28 periph B */
> >>> -                                                    AT91_PIOC 29 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC29 periph B */
> >>> -                                                    AT91_PIOC 30 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC30 periph B */
> >>> -                                                    AT91_PIOC 31 AT91_PERIPH_B AT91_PINCTRL_NONE>; /* PC31 periph B */
> >>> -                                   };
> >>> -                           };
> >>> -                   };
> >>> -
> >>> -                   macb1: ethernet at f8030000 {
> >>> -                           pinctrl-names = "default";
> >>> -                           pinctrl-0 = <&pinctrl_macb1_rmii>;
> >>>                     };
> >>>             };
> >>>     };
> >>> diff --git a/arch/arm/boot/dts/at91sam9x35.dtsi b/arch/arm/boot/dts/at91sam9x35.dtsi
> >>> index 1a3d525..8eac66c 100644
> >>> --- a/arch/arm/boot/dts/at91sam9x35.dtsi
> >>> +++ b/arch/arm/boot/dts/at91sam9x35.dtsi
> >>> @@ -7,6 +7,7 @@
> >>>     */
> >>>
> >>>    #include "at91sam9x5.dtsi"
> >>> +#include "at91sam9x5_macb0.dtsi"
> >>>
> >>>    / {
> >>>     model = "Atmel AT91SAM9X35 SoC";
> >>> diff --git a/arch/arm/boot/dts/at91sam9x5.dtsi b/arch/arm/boot/dts/at91sam9x5.dtsi
> >>> index 57d45f5..05f4c74 100644
> >>> --- a/arch/arm/boot/dts/at91sam9x5.dtsi
> >>> +++ b/arch/arm/boot/dts/at91sam9x5.dtsi
> >>> @@ -206,29 +206,6 @@
> >>>                                     };
> >>>                             };
> >>>
> >>> -                           usart3 {
> >>> -                                   pinctrl_usart3: usart3-0 {
> >>> -                                           atmel,pins =
> >>> -                                                   <AT91_PIOC 22 AT91_PERIPH_B AT91_PINCTRL_PULL_UP        /* PC22 periph B with pullup */
> >>> -                                                    AT91_PIOC 23 AT91_PERIPH_B AT91_PINCTRL_NONE>; /* PC23 periph B */
> >>> -                                   };
> >>> -
> >>> -                                   pinctrl_usart3_rts: usart3_rts-0 {
> >>> -                                           atmel,pins =
> >>> -                                                   <AT91_PIOC 24 AT91_PERIPH_B AT91_PINCTRL_NONE>; /* PC24 periph B */
> >>> -                                   };
> >>> -
> >>> -                                   pinctrl_usart3_cts: usart3_cts-0 {
> >>> -                                           atmel,pins =
> >>> -                                                   <AT91_PIOC 25 AT91_PERIPH_B AT91_PINCTRL_NONE>; /* PC25 periph B */
> >>> -                                   };
> >>> -
> >>> -                                   pinctrl_usart3_sck: usart3_sck-0 {
> >>> -                                           atmel,pins =
> >>> -                                                   <AT91_PIOC 26 AT91_PERIPH_B AT91_PINCTRL_NONE>; /* PC26 periph B */
> >>> -                                   };
> >>> -                           };
> >>> -
> >>>                             uart0 {
> >>>                                     pinctrl_uart0: uart0-0 {
> >>>                                             atmel,pins =
> >>> @@ -277,34 +254,6 @@
> >>>                                     };
> >>>                             };
> >>>
> >>> -                           macb0 {
> >>> -                                   pinctrl_macb0_rmii: macb0_rmii-0 {
> >>> -                                           atmel,pins =
> >>> -                                                   <AT91_PIOB 0 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB0 periph A */
> >>> -                                                    AT91_PIOB 1 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB1 periph A */
> >>> -                                                    AT91_PIOB 2 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB2 periph A */
> >>> -                                                    AT91_PIOB 3 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB3 periph A */
> >>> -                                                    AT91_PIOB 4 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB4 periph A */
> >>> -                                                    AT91_PIOB 5 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB5 periph A */
> >>> -                                                    AT91_PIOB 6 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB6 periph A */
> >>> -                                                    AT91_PIOB 7 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB7 periph A */
> >>> -                                                    AT91_PIOB 9 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB9 periph A */
> >>> -                                                    AT91_PIOB 10 AT91_PERIPH_A AT91_PINCTRL_NONE>; /* PB10 periph A */
> >>> -                                   };
> >>> -
> >>> -                                   pinctrl_macb0_rmii_mii: macb0_rmii_mii-0 {
> >>> -                                           atmel,pins =
> >>> -                                                   <AT91_PIOB 8 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB8 periph A */
> >>> -                                                    AT91_PIOB 11 AT91_PERIPH_A AT91_PINCTRL_NONE   /* PB11 periph A */
> >>> -                                                    AT91_PIOB 12 AT91_PERIPH_A AT91_PINCTRL_NONE   /* PB12 periph A */
> >>> -                                                    AT91_PIOB 13 AT91_PERIPH_A AT91_PINCTRL_NONE   /* PB13 periph A */
> >>> -                                                    AT91_PIOB 14 AT91_PERIPH_A AT91_PINCTRL_NONE   /* PB14 periph A */
> >>> -                                                    AT91_PIOB 15 AT91_PERIPH_A AT91_PINCTRL_NONE   /* PB15 periph A */
> >>> -                                                    AT91_PIOB 16 AT91_PERIPH_A AT91_PINCTRL_NONE   /* PB16 periph A */
> >>> -                                                    AT91_PIOB 17 AT91_PERIPH_A AT91_PINCTRL_NONE>; /* PB17 periph A */
> >>> -                                   };
> >>> -                           };
> >>> -
> >>>                             mmc0 {
> >>>                                     pinctrl_mmc0_slot0_clk_cmd_dat0: mmc0_slot0_clk_cmd_dat0-0 {
> >>>                                             atmel,pins =
> >>> @@ -605,22 +554,6 @@
> >>>                             status = "disabled";
> >>>                     };
> >>>
> >>> -                   macb0: ethernet at f802c000 {
> >>> -                           compatible = "cdns,at32ap7000-macb", "cdns,macb";
> >>> -                           reg = <0xf802c000 0x100>;
> >>> -                           interrupts = <24 IRQ_TYPE_LEVEL_HIGH 3>;
> >>> -                           pinctrl-names = "default";
> >>> -                           pinctrl-0 = <&pinctrl_macb0_rmii>;
> >>> -                           status = "disabled";
> >>> -                   };
> >>> -
> >>> -                   macb1: ethernet at f8030000 {
> >>> -                           compatible = "cdns,at32ap7000-macb", "cdns,macb";
> >>> -                           reg = <0xf8030000 0x100>;
> >>> -                           interrupts = <27 IRQ_TYPE_LEVEL_HIGH 3>;
> >>> -                           status = "disabled";
> >>> -                   };
> >>> -
> >>>                     i2c0: i2c at f8010000 {
> >>>                             compatible = "atmel,at91sam9x5-i2c";
> >>>                             reg = <0xf8010000 0x100>;
> >>> diff --git a/arch/arm/boot/dts/at91sam9x5_macb0.dtsi b/arch/arm/boot/dts/at91sam9x5_macb0.dtsi
> >>> new file mode 100644
> >>> index 0000000..55731ff
> >>> --- /dev/null
> >>> +++ b/arch/arm/boot/dts/at91sam9x5_macb0.dtsi
> >>> @@ -0,0 +1,56 @@
> >>> +/*
> >>> + * at91sam9x5_macb0.dtsi - Device Tree Include file for AT91SAM9x5 SoC with 1
> >>> + * Ethernet interface.
> >>> + *
> >>> + * Copyright (C) 2013 Boris BREZILLON <[email-masked]>
> >>> + *
> >>> + * Licensed under GPLv2.
> >>> + */
> >>> +
> >>> +#include <dt-bindings/pinctrl/at91.h>
> >>> +#include <dt-bindings/interrupt-controller/irq.h>
> >>> +
> >>> +/ {
> >>> +   ahb {
> >>> +           apb {
> >>> +                   pinctrl at fffff400 {
> >>> +                           macb0 {
> >>> +                                   pinctrl_macb0_rmii: macb0_rmii-0 {
> >>> +                                           atmel,pins =
> >>> +                                                   <AT91_PIOB 0 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB0 periph A */
> >>> +                                                    AT91_PIOB 1 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB1 periph A */
> >>> +                                                    AT91_PIOB 2 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB2 periph A */
> >>> +                                                    AT91_PIOB 3 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB3 periph A */
> >>> +                                                    AT91_PIOB 4 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB4 periph A */
> >>> +                                                    AT91_PIOB 5 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB5 periph A */
> >>> +                                                    AT91_PIOB 6 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB6 periph A */
> >>> +                                                    AT91_PIOB 7 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB7 periph A */
> >>> +                                                    AT91_PIOB 9 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB9 periph A */
> >>> +                                                    AT91_PIOB 10 AT91_PERIPH_A AT91_PINCTRL_NONE>; /* PB10 periph A */
> >>> +                                   };
> >>> +
> >>> +                                   pinctrl_macb0_rmii_mii: macb0_rmii_mii-0 {
> >>> +                                           atmel,pins =
> >>> +                                                   <AT91_PIOB 8 AT91_PERIPH_A AT91_PINCTRL_NONE    /* PB8 periph A */
> >>> +                                                    AT91_PIOB 11 AT91_PERIPH_A AT91_PINCTRL_NONE   /* PB11 periph A */
> >>> +                                                    AT91_PIOB 12 AT91_PERIPH_A AT91_PINCTRL_NONE   /* PB12 periph A */
> >>> +                                                    AT91_PIOB 13 AT91_PERIPH_A AT91_PINCTRL_NONE   /* PB13 periph A */
> >>> +                                                    AT91_PIOB 14 AT91_PERIPH_A AT91_PINCTRL_NONE   /* PB14 periph A */
> >>> +                                                    AT91_PIOB 15 AT91_PERIPH_A AT91_PINCTRL_NONE   /* PB15 periph A */
> >>> +                                                    AT91_PIOB 16 AT91_PERIPH_A AT91_PINCTRL_NONE   /* PB16 periph A */
> >>> +                                                    AT91_PIOB 17 AT91_PERIPH_A AT91_PINCTRL_NONE>; /* PB17 periph A */
> >>> +                                   };
> >>> +                           };
> >>> +                   };
> >>> +
> >>> +                   macb0: ethernet at f802c000 {
> >>> +                           compatible = "cdns,at32ap7000-macb", "cdns,macb";
> >>> +                           reg = <0xf802c000 0x100>;
> >>> +                           interrupts = <24 IRQ_TYPE_LEVEL_HIGH 3>;
> >>> +                           pinctrl-names = "default";
> >>> +                           pinctrl-0 = <&pinctrl_macb0_rmii>;
> >>> +                           status = "disabled";
> >>> +                   };
> >>> +           };
> >>> +   };
> >>> +};
> >>> diff --git a/arch/arm/boot/dts/at91sam9x5_macb1.dtsi b/arch/arm/boot/dts/at91sam9x5_macb1.dtsi
> >>> new file mode 100644
> >>> index 0000000..77425a6
> >>> --- /dev/null
> >>> +++ b/arch/arm/boot/dts/at91sam9x5_macb1.dtsi
> >>> @@ -0,0 +1,44 @@
> >>> +/*
> >>> + * at91sam9x5_macb1.dtsi - Device Tree Include file for AT91SAM9x5 SoC with 2
> >>> + * Ethernet interfaces.
> >>> + *
> >>> + * Copyright (C) 2013 Boris BREZILLON <[email-masked]>
> >>> + *
> >>> + * Licensed under GPLv2.
> >>> + */
> >>> +
> >>> +#include <dt-bindings/pinctrl/at91.h>
> >>> +#include <dt-bindings/interrupt-controller/irq.h>
> >>> +
> >>> +/ {
> >>> +   ahb {
> >>> +           apb {
> >>> +                   pinctrl at fffff400 {
> >>> +                           macb1 {
> >>> +                                   pinctrl_macb1_rmii: macb1_rmii-0 {
> >>> +                                           atmel,pins =
> >>> +                                                   <AT91_PIOC 16 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC16 periph B */
> >>> +                                                    AT91_PIOC 18 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC18 periph B */
> >>> +                                                    AT91_PIOC 19 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC19 periph B */
> >>> +                                                    AT91_PIOC 20 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC20 periph B */
> >>> +                                                    AT91_PIOC 21 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC21 periph B */
> >>> +                                                    AT91_PIOC 27 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC27 periph B */
> >>> +                                                    AT91_PIOC 28 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC28 periph B */
> >>> +                                                    AT91_PIOC 29 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC29 periph B */
> >>> +                                                    AT91_PIOC 30 AT91_PERIPH_B AT91_PINCTRL_NONE   /* PC30 periph B */
> >>> +                                                    AT91_PIOC 31 AT91_PERIPH_B AT91_PINCTRL_NONE>; /* PC31 periph B */
> >>> +                                   };
> >>> +                           };
> >>> +                   };
> >>> +
> >>> +                   macb1: ethernet at f8030000 {
> >>> +                           compatible = "cdns,at32ap7000-macb", "cdns,macb";
> >>> +                           reg = <0xf8030000 0x100>;
> >>> +                           interrupts = <27 IRQ_TYPE_LEVEL_HIGH 3>;
> >>> +                           pinctrl-names = "default";
> >>> +                           pinctrl-0 = <&pinctrl_macb1_rmii>;
> >>> +                           status = "disabled";
> >>> +                   };
> >>> +           };
> >>> +   };
> >>> +};
> >>> diff --git a/arch/arm/boot/dts/at91sam9x5_usart3.dtsi b/arch/arm/boot/dts/at91sam9x5_usart3.dtsi
> >>> new file mode 100644
> >>> index 0000000..5589579
> >>> --- /dev/null
> >>> +++ b/arch/arm/boot/dts/at91sam9x5_usart3.dtsi
> >>> @@ -0,0 +1,51 @@
> >>> +/*
> >>> + * at91sam9x5_lcdc.dtsi - Device Tree Include file for AT91SAM9x5 SoC with
> >>> + * 4 USART.
> >>> + *
> >>> + * Copyright (C) 2013 Boris BREZILLON <[email-masked]>
> >>> + *
> >>> + * Licensed under GPLv2.
> >>> + */
> >>> +
> >>> +#include <dt-bindings/pinctrl/at91.h>
> >>> +#include <dt-bindings/interrupt-controller/irq.h>
> >>> +
> >>> +/ {
> >>> +   ahb {
> >>> +           apb {
> >>> +                   pinctrl at fffff400 {
> >>> +                           usart3 {
> >>> +                                   pinctrl_usart3: usart3-0 {
> >>> +                                           atmel,pins =
> >>> +                                                   <AT91_PIOC 22 AT91_PERIPH_B AT91_PINCTRL_PULL_UP        /* PC22 periph B with pullup */
> >>> +                                                    AT91_PIOC 23 AT91_PERIPH_B AT91_PINCTRL_NONE>;         /* PC23 periph B */
> >>> +                                   };
> >>> +
> >>> +                                   pinctrl_usart3_rts: usart3_rts-0 {
> >>> +                                           atmel,pins =
> >>> +                                                   <AT91_PIOC 24 AT91_PERIPH_B AT91_PINCTRL_NONE>;         /* PC24 periph B */
> >>> +                                   };
> >>> +
> >>> +                                   pinctrl_usart3_cts: usart3_cts-0 {
> >>> +                                           atmel,pins =
> >>> +                                                   <AT91_PIOC 25 AT91_PERIPH_B AT91_PINCTRL_NONE>;         /* PC25 periph B */
> >>> +                                   };
> >>> +
> >>> +                                   pinctrl_usart3_sck: usart3_sck-0 {
> >>> +                                           atmel,pins =
> >>> +                                                   <AT91_PIOC 26 AT91_PERIPH_B AT91_PINCTRL_NONE>;         /* PC26 periph B */
> >>> +                                   };
> >>> +                           };
> >>> +                   };
> >>> +
> >>> +                   usart3: serial at f8028000 {
> >>> +                           compatible = "atmel,at91sam9260-usart";
> >>> +                           reg = <0xf8028000 0x200>;
> >>> +                           interrupts = <8 IRQ_TYPE_LEVEL_HIGH 5>;
> >>> +                           pinctrl-names = "default";
> >>> +                           pinctrl-0 = <&pinctrl_usart3>;
> >>> +                           status = "disabled";
> >>> +                   };
> >>> +           };
> >>> +   };
> >>> +};
> >>> --
> >>> 1.7.9.5
> >>>
> >
> >
> 
> 
> -- 
> Nicolas Ferre