Messages in this thread | | | Date | Fri, 8 Feb 2013 17:55:30 +0100 | From | Jean-Christophe PLAGNIOL-VILLARD <> | Subject | Re: [v4 PATCH 12/12] ARM: dts: add spi nodes for the atmel boards |
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On 01:51 Fri 08 Feb , Yang, Wenyou wrote: > Hello, JC > > > -----Original Message----- > > From: Yang, Wenyou > > Sent: 2013年2月6日 9:35 > > To: 'Jean-Christophe PLAGNIOL-VILLARD' > > Cc: linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org; Ferre, > > Nicolas; richard.genoud@gmail.com; Lin, JM; linux@arm.linux.org.uk > > Subject: RE: [v4 PATCH 12/12] ARM: dts: add spi nodes for the atmel boards > > > > > > > > > -----Original Message----- > > > From: Jean-Christophe PLAGNIOL-VILLARD [mailto:plagnioj@jcrosoft.com] > > > Sent: 2013年2月6日 3:50 > > > To: Yang, Wenyou > > > Cc: linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org; > > Ferre, > > > Nicolas; richard.genoud@gmail.com; Lin, JM; linux@arm.linux.org.uk > > > Subject: Re: [v4 PATCH 12/12] ARM: dts: add spi nodes for the atmel boards > > > > > > On 15:34 Mon 14 Jan , Wenyou Yang wrote: > > > > From: Richard Genoud <richard.genoud@gmail.com> > > > > > > > > Signed-off-by: Richard Genoud <richard.genoud@gmail.com> > > > > [wenyou.yang@atmel.com: added spi nodes for the sam9263ek, > > sam9g20ek, > > > sam9m10g45ek and sam9n12ek boards] > > > > Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> > > > > Cc: linux@arm.linux.org.uk > > > > --- > > > > arch/arm/boot/dts/at91sam9263ek.dts | 14 > > > ++++++++++++++ > > > > arch/arm/boot/dts/at91sam9g20ek_common.dtsi | 14 > > > ++++++++++++++ > > > > arch/arm/boot/dts/at91sam9m10g45ek.dts | 14 > > > ++++++++++++++ > > > > arch/arm/boot/dts/at91sam9n12ek.dts | 14 > > > ++++++++++++++ > > > > arch/arm/boot/dts/at91sam9x5ek.dtsi | 14 > > ++++++++++++++ > > > > 5 files changed, 70 insertions(+) > > > > > > > > diff --git a/arch/arm/boot/dts/at91sam9263ek.dts > > > b/arch/arm/boot/dts/at91sam9263ek.dts > > > > index 1eb0872..63ba57b 100644 > > > > --- a/arch/arm/boot/dts/at91sam9263ek.dts > > > > +++ b/arch/arm/boot/dts/at91sam9263ek.dts > > > > @@ -79,6 +79,20 @@ > > > > }; > > > > }; > > > > }; > > > > + > > > > + spi0: spi@fffa4000 { > > > > + status = "okay"; > > > > + cs-gpios = <&pioA 5 0 > > > > + &pioA 3 0 > > > > + &pioA 4 0 > > > > + &pioB 11 0 > > > NACK > > > > > > we no use that much as cs-gpios on this hw > > > > Thanks for your feedback. > > > > Listing the all choices for cs-gpios, one cs-gpio is selected by reg value. > > Maybe listing one cs-gpio is OK. > > I will try it. > > > > I am going to dig the feasibility of removing cs-gpios. > > I need remain the list of cs-gpios, because "master->num_chipselect" is got from the number of item of this list. > If this list is removed, only the cs-gpio for used chip-select is provided , it works for CS0 chip-select, but it fails to work for other than CS0, e.g. CS1. > I did the cs-gpios support you can not expect to do not have it on at91
but you need to ONLY provide the used gpio not ALL
Best Regards, J. > Could you give me some idea? > Thank you in advance. > > > > > > > + >; > > > > + mtd_dataflash@0 { > > > > + compatible = "atmel,at45", "atmel,dataflash"; > > > > + spi-max-frequency = <50000000>; > > > > + reg = <0>; > > > > + }; > > > > + }; > > > > }; > > > > > > > > nand0: nand@40000000 { > > > > diff --git a/arch/arm/boot/dts/at91sam9g20ek_common.dtsi > > > b/arch/arm/boot/dts/at91sam9g20ek_common.dtsi > > > > index da15e83..49ad49e 100644 > > > > --- a/arch/arm/boot/dts/at91sam9g20ek_common.dtsi > > > > +++ b/arch/arm/boot/dts/at91sam9g20ek_common.dtsi > > > > @@ -96,6 +96,20 @@ > > > > status = "okay"; > > > > pinctrl-0 = <&pinctrl_ssc0_tx>; > > > > }; > > > > + > > > > + spi0: spi@fffc8000 { > > > > + status = "okay"; > > > > + cs-gpios = <&pioA 3 0 > > > > + &pioC 11 0 > > > > + &pioC 16 0 > > > > + &pioC 17 0 > > > ditto and so on > > > > > > you must only provife the gpio use by the hw > > > > + >; > > > > + mtd_dataflash@0 { > > > > + compatible = "atmel,at45", "atmel,dataflash"; > > > > + spi-max-frequency = <50000000>; > > > > + reg = <1>; > > > > + }; > > > > + }; > > > > }; > > > > > > > > nand0: nand@40000000 { > > > > diff --git a/arch/arm/boot/dts/at91sam9m10g45ek.dts > > > b/arch/arm/boot/dts/at91sam9m10g45ek.dts > > > > index 20c3191..275f22d 100644 > > > > --- a/arch/arm/boot/dts/at91sam9m10g45ek.dts > > > > +++ b/arch/arm/boot/dts/at91sam9m10g45ek.dts > > > > @@ -102,6 +102,20 @@ > > > > }; > > > > }; > > > > }; > > > > + > > > > + spi0: spi@fffa4000{ > > > > + status = "okay"; > > > > + cs-gpios = <&pioB 3 0 > > > > + &pioB 18 0 > > > > + &pioB 19 0 > > > > + &pioD 27 0 > > > > + >; > > > > + mtd_dataflash@0 { > > > > + compatible = "atmel,at45", "atmel,dataflash"; > > > > + spi-max-frequency = <13000000>; > > > > + reg = <0>; > > > > + }; > > > > + }; > > > > }; > > > > > > > > nand0: nand@40000000 { > > > > diff --git a/arch/arm/boot/dts/at91sam9n12ek.dts > > > b/arch/arm/boot/dts/at91sam9n12ek.dts > > > > index 0376bf4..4eeca7b 100644 > > > > --- a/arch/arm/boot/dts/at91sam9n12ek.dts > > > > +++ b/arch/arm/boot/dts/at91sam9n12ek.dts > > > > @@ -67,6 +67,20 @@ > > > > }; > > > > }; > > > > }; > > > > + > > > > + spi0: spi@f0000000 { > > > > + status = "okay"; > > > > + cs-gpios = <&pioA 14 0 > > > > + &pioA 7 0 > > > > + &pioA 1 0 > > > > + &pioB 3 0 > > > > + >; > > > > + m25p80@0 { > > > > + compatible = "atmel,at25df321a"; > > > > + spi-max-frequency = <50000000>; > > > > + reg = <0>; > > > > + }; > > > > + }; > > > > }; > > > > > > > > nand0: nand@40000000 { > > > > diff --git a/arch/arm/boot/dts/at91sam9x5ek.dtsi > > > b/arch/arm/boot/dts/at91sam9x5ek.dtsi > > > > index 8a7cf1d..ca0a056 100644 > > > > --- a/arch/arm/boot/dts/at91sam9x5ek.dtsi > > > > +++ b/arch/arm/boot/dts/at91sam9x5ek.dtsi > > > > @@ -84,6 +84,20 @@ > > > > }; > > > > }; > > > > }; > > > > + > > > > + spi0: spi@f0000000 { > > > > + status = "okay"; > > > > + cs-gpios = <&pioA 14 0 > > > > + &pioA 7 0 > > > > + &pioA 1 0 > > > > + &pioB 3 0 > > > > + >; > > > > + m25p80@0 { > > > > + compatible = "atmel,at25df321a"; > > > > + spi-max-frequency = <50000000>; > > > > + reg = <0>; > > > > + }; > > > > + }; > > > > }; > > > > > > > > usb0: ohci@00600000 { > > > > -- > > > > 1.7.9.5 > > > > > > > > Best Regards, > > Wenyou Yang > > Best Regards, > Wenyou Yang -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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