linux-kernel - Re: [PATCH] ARM: at91/dt: split sam9x5 peripheral definitions

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Date:	Wed, 07 Aug 2013 12:55:19 +0200
From:	boris brezillon <b.brezillon@...rkiz.com>
To:	Richard Genoud <richard.genoud@...il.com>
CC:	Russell King <linux@....linux.org.uk>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Ludovic Desroches <ludovic.desroches@...el.com>,
	Mark Brown <broonie@...nel.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH] ARM: at91/dt: split sam9x5 peripheral definitions

Hello Richard,

On 07/08/2013 12:38, Richard Genoud wrote:
> 2013/8/7 Boris BREZILLON <b.brezillon@...rkiz.com>:
>> 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).
>>
>> Signed-off-by: Boris BREZILLON <b.brezillon@...rkiz.com>
>> ---
>>   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
>>
> [snip]
>> 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.
> One minor comment mistake here !
Nice catch!

I'll fix it for the next version.

BTW did you test it (I didn't: I don't have any board with this SoC 
family) ?

This separation was formerly done in the "at91 common clk" series but I 
removed it
from the new version (which I will submit soon) to ease the review and 
tests.


Best Regards,

Boris
>> + *
>> + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@...rkiz.com>
>> + *
>> + * Licensed under GPLv2.
>> + */
>> +
>> +#include <dt-bindings/pinctrl/at91.h>
>> +#include <dt-bindings/interrupt-controller/irq.h>
>> +
>> +/ {
>> +       ahb {
>> +               apb {
>> +                       pinctrl@...ff400 {
>> +                               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@...28000 {
>> +                               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
>>
>
>

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