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

From: [email-masked] (Benoit Cousson)
Date: Wed, 31 Oct 2012 11:35:13 +0100

On 10/31/2012 11:16 AM, Benoit Cousson wrote:
> Hi Avinash,
> 
> On 10/30/2012 10:41 AM, Philip, Avinash wrote:
>> 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]
> 
> Yes, I've just applied it in for_3.8/dts branch

Well, in fact I did not, it does not apply :-(

Can you rebase on top of the for_3.8/dts branch? I've just applied the
RTC patch on top that was OK.

Thanks,
Benoit

> 
>> In case if you want I will resubmit a patch with subject line modified.
> 
> No, that's fine.
> 
> Thanks,
> Benoit
> 
>>
>> 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 <[email-masked]>
>>>> ---
>>>>  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
>>>>
>>>>
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>>>>
>>>
>>>
>>
>