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Message-ID: <B256D81BAE5131468A838E5D7A2436413A086C11@penmbx02>
Date: Wed, 6 Feb 2013 01:34:43 +0000
From: "Yang, Wenyou" <Wenyou.Yang@...el.com>
To: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
CC: "linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"Ferre, Nicolas" <Nicolas.FERRE@...el.com>,
"richard.genoud@...il.com" <richard.genoud@...il.com>,
"Lin, JM" <JM.Lin@...el.com>,
"linux@....linux.org.uk" <linux@....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@...osoft.com]
> Sent: 2013年2月6日 3:50
> To: Yang, Wenyou
> Cc: linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org; Ferre,
> Nicolas; richard.genoud@...il.com; Lin, JM; linux@....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@...il.com>
> >
> > Signed-off-by: Richard Genoud <richard.genoud@...il.com>
> > [wenyou.yang@...el.com: added spi nodes for the sam9263ek, sam9g20ek,
> sam9m10g45ek and sam9n12ek boards]
> > Signed-off-by: Wenyou Yang <wenyou.yang@...el.com>
> > Cc: linux@....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@...a4000 {
> > + 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.
> > + >;
> > + mtd_dataflash@0 {
> > + compatible = "atmel,at45", "atmel,dataflash";
> > + spi-max-frequency = <50000000>;
> > + reg = <0>;
> > + };
> > + };
> > };
> >
> > nand0: nand@...00000 {
> > 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@...c8000 {
> > + 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@...00000 {
> > 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@...a4000{
> > + 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@...00000 {
> > 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@...00000 {
> > + 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@...00000 {
> > 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@...00000 {
> > + 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@...00000 {
> > --
> > 1.7.9.5
> >
Best Regards,
Wenyou Yang
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