[RFC PATCH v3 16/16] ARM: dts: add AM33XX SPI support

[Philip, Avinash]

On Mon, Oct 29, 2012 at 14:40:02, Philip, Avinash wrote:
> On Thu, Oct 18, 2012 at 18:56:55, Porter, Matt wrote:
> > Adds AM33XX SPI support for am335x-bone and am335x-evm.

Matt,

Can you build SPI DT patch with DMA support on top of SPI DT patch
I submitted [1]. With the patch [1] SPI can work on PIO mode.
So we can have basic SPI support available in 3.8.

Benoit,
Can you accept the SPI DT patch [1]

In case if you want I will resubmit a patch with subject line modified.

Current subject line
arm/dts: AM33XX: Add SPI device tree data

1. https://patchwork.kernel.org/patch/1470661/

Thanks
Avinash

> > 
> > Signed-off-by: Matt Porter <mporter at ti.com>
> > ---
> >  arch/arm/boot/dts/am335x-bone.dts |   17 +++++++++++++++
> >  arch/arm/boot/dts/am335x-evm.dts  |    9 ++++++++
> >  arch/arm/boot/dts/am33xx.dtsi     |   43 +++++++++++++++++++++++++++++++++++++
> >  3 files changed, 69 insertions(+)
> > 
> > diff --git a/arch/arm/boot/dts/am335x-bone.dts b/arch/arm/boot/dts/am335x-bone.dts
> > index 5510979..23edfd8 100644
> > --- a/arch/arm/boot/dts/am335x-bone.dts
> > +++ b/arch/arm/boot/dts/am335x-bone.dts
> > @@ -18,6 +18,17 @@
> >  		reg = <0x80000000 0x10000000>; /* 256 MB */
> >  	};
> >  
> > +	am3358_pinmux: pinmux at 44e10800 {
> > +		spi1_pins: pinmux_spi1_pins {
> > +			pinctrl-single,pins = <
> > +				0x190 0x13	/* mcasp0_aclkx.spi1_sclk, OUTPUT_PULLUP | MODE3 */
> > +				0x194 0x33	/* mcasp0_fsx.spi1_d0, INPUT_PULLUP | MODE3 */
> > +				0x198 0x13	/* mcasp0_axr0.spi1_d1, OUTPUT_PULLUP | MODE3 */
> > +				0x19c 0x13	/* mcasp0_ahclkr.spi1_cs0, OUTPUT_PULLUP | MODE3 */
> > +			>;
> > +		};
> > +	};
> > +
> 
> Change to am33xx_pinmux.
> 
> >  	ocp {
> >  		uart1: serial at 44e09000 {
> >  			status = "okay";
> > @@ -84,3 +95,9 @@
> >  &mmc1 {
> >  	vmmc-supply = <&ldo3_reg>;
> >  };
> > +
> > +&spi1 {
> > +	status = "okay";
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&spi1_pins>;
> > +};
> > diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
> > index d63fce8..8d5f660 100644
> > --- a/arch/arm/boot/dts/am335x-evm.dts
> > +++ b/arch/arm/boot/dts/am335x-evm.dts
> > @@ -124,3 +124,12 @@
> >  &mmc1 {
> >  	vmmc-supply = <&vmmc_reg>;
> >  };
> > +
> > +&spi0 {
> > +	status = "okay";
> > +	spi-flash at 0 {
> > +		compatible = "spansion,s25fl064k", "m25p80";
> > +		spi-max-frequency = <24000000>;
> > +		reg = <0>;
> > +	};
> > +};
> 
> In AM335x-evm, SPI flash available in profile #2 (am335x evm specific profiles).
> So can you drop this changes as if I understood correctly, am335x-evm.dts will be
> populated for devices present only on profile #0.
> 
> > diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
> > index 26a6af7..063ecea 100644
> > --- a/arch/arm/boot/dts/am33xx.dtsi
> > +++ b/arch/arm/boot/dts/am33xx.dtsi
> > @@ -40,6 +40,15 @@
> >  		};
> >  	};
> >  
> > +	am3358_pinmux: pinmux at 44e10800 {
> > +		compatible = "pinctrl-single";
> > +		reg = <0x44e10800 0x0238>;
> > +		#address-cells = <1>;
> > +		#size-cells = <0>;
> > +		pinctrl-single,register-width = <32>;
> > +		pinctrl-single,function-mask = <0x7f>;
> > +	};
> > +
> 
> Pin ctrl support already submitted
> http://git.kernel.org/?p=linux/kernel/git/bcousson/linux-omap-dt.git;a=commitdiff;h=3e0603e905d9ba662e8c1885ecb1d28bc454e448
> 
> Thanks
> Avinash
> 
> >  	/*
> >  	 * XXX: Use a flat representation of the AM33XX interconnect.
> >  	 * The real AM33XX interconnect network is quite complex.Since
> > @@ -261,6 +270,40 @@
> >  			status = "disabled";
> >  		};
> >  
> > +		spi0: spi at 48030000 {
> > +			compatible = "ti,omap4-mcspi";
> > +			ti,hwmods = "spi0";
> > +			#address-cells = <1>;
> > +			#size-cells = <0>;
> > +			reg = <0x48030000 0x400>;
> > +			interrupt-parent = <&intc>;
> > +			interrupt = <65>;
> > +			dmas = <&edma 16
> > +				&edma 17
> > +				&edma 18
> > +				&edma 19>;
> > +			dma-names = "tx0", "rx0", "tx1", "rx1";
> > +			ti,spi-num-cs = <2>;
> > +			status = "disabled";
> > +		};
> > +
> > +		spi1: spi at 481a0000 {
> > +			compatible = "ti,omap4-mcspi";
> > +			ti,hwmods = "spi1";
> > +			#address-cells = <1>;
> > +			#size-cells = <0>;
> > +			reg = <0x481a0000 0x400>;
> > +			interrupt-parent = <&intc>;
> > +			interrupt = <125>;
> > +			dmas = <&edma 42
> > +				&edma 43
> > +				&edma 44
> > +				&edma 45>;
> > +			dma-names = "tx0", "rx0", "tx1", "rx1";
> > +			ti,spi-num-cs = <2>;
> > +			status = "disabled";
> > +		};
> > +
> >  		wdt2: wdt at 44e35000 {
> >  			compatible = "ti,omap3-wdt";
> >  			ti,hwmods = "wd_timer2";
> > -- 
> > 1.7.9.5
> > 
> > 
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel at lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> > 
> 
>