Messages in this thread | | | From | "Yang, Wenyou" <> | Subject | RE: [v4 PATCH 12/12] ARM: dts: add spi nodes for the atmel boards | Date | Fri, 8 Feb 2013 01:51:09 +0000 |
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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.
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
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