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Message-ID: <5090FA92.1080400@ti.com>
Date: Wed, 31 Oct 2012 11:16:50 +0100
From: Benoit Cousson <b-cousson@...com>
To: "Philip, Avinash" <avinashphilip@...com>
CC: "Porter, Matt" <mporter@...com>, Tony Lindgren <tony@...mide.com>,
"Nori, Sekhar" <nsekhar@...com>,
Grant Likely <grant.likely@...retlab.ca>,
Mark Brown <broonie@...nsource.wolfsonmicro.com>,
Russell King <linux@....linux.org.uk>,
Vinod Koul <vinod.koul@...el.com>,
Rob Landley <rob@...dley.net>, Chris Ball <cjb@...top.org>,
Linux DaVinci Kernel List
<davinci-linux-open-source@...ux.davincidsp.com>,
Arnd Bergmann <arnd@...db.de>,
Linux Documentation List <linux-doc@...r.kernel.org>,
Devicetree Discuss <devicetree-discuss@...ts.ozlabs.org>,
Linux MMC List <linux-mmc@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Rob Herring <rob.herring@...xeda.com>,
Dan Williams <djbw@...com>,
Linux SPI Devel List
<spi-devel-general@...ts.sourceforge.net>,
Linux OMAP List <linux-omap@...r.kernel.org>,
Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC PATCH v3 16/16] ARM: dts: add AM33XX SPI support
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
> 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 <mporter@...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@...10800 {
>>> + 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@...09000 {
>>> 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@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@...10800 {
>>> + 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@...30000 {
>>> + 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@...a0000 {
>>> + 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@...35000 {
>>> compatible = "ti,omap3-wdt";
>>> ti,hwmods = "wd_timer2";
>>> --
>>> 1.7.9.5
>>>
>>>
>>> _______________________________________________
>>> linux-arm-kernel mailing list
>>> linux-arm-kernel@...ts.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>>
>>
>>
>
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