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+aTWD2M2MgiNhKWrvenj+j9J4yyhD5Wj5DKzU5qrnEICE4NMdnaUvquOdyyTPtmhKGEBMfmQNLQSlKYVOWmeo/wzArowOKxQRYNq2vlMWdU= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR1101MB2293 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220112_013819_675683_85E06595 X-CRM114-Status: GOOD ( 29.80 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On 17/12/2021 16:00, Geert Uytterhoeven wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > Hi Conor, > > On Fri, Dec 17, 2021 at 4:32 PM wrote: >> On 17/12/2021 13:43, Geert Uytterhoeven wrote: >>> On Fri, Dec 17, 2021 at 10:33 AM wrote: >>>> From: Conor Dooley >>>> >>>> Split the device tree for the Microchip MPFS into two sections by adding >>>> microchip-mpfs-fabric.dtsi, which contains peripherals contained in the >>>> FPGA fabric. >>>> >>>> Signed-off-by: Conor Dooley >>> >>> Thanks for your patch! >>> >>>> --- /dev/null >>>> +++ b/arch/riscv/boot/dts/microchip/microchip-mpfs-fabric.dtsi >>>> @@ -0,0 +1,13 @@ >>>> +// SPDX-License-Identifier: (GPL-2.0 OR MIT) >>>> +/* Copyright (c) 2020-2021 Microchip Technology Inc */ >>>> + >>>> +/ { >>>> + corePWM0: pwm@41000000 { >>>> + compatible = "microchip,corepwm"; >>>> + reg = <0x0 0x41000000 0x0 0xF0>; >>>> + microchip,sync-update = /bits/ 8 <0>; >>>> + #pwm-cells = <2>; >>>> + clocks = <&clkcfg CLK_FIC3>; >>>> + status = "disabled"; >>>> + }; >>> >>> I'm wondering if these should be grouped under a "fabric" subnode, >>> like we have an "soc" subnode for on-SoC devices? Rob? >>> >>> BTW, do you already have a naming plan for different revisions of >>> FPGA fabric cores? >> Not yet (assuming you mean specifically how we will handle it in the >> device tree) - although i was talking to someone about it yesterday. >> It's possible that we might handle that via a register, but if you have >> a suggestion or some precedence that you're aware of that would be useful. >> >> The actual naming convention of the IP cores themselves, yeah. I will >> dig it up for you on Monday. > > I meant what if corepwm is enhanced, and how to detect that? > Looks like "microchip,core-N" is the plan. More recent IP cores have a register from which the version number can be read but that isnt (and wont be) the case for all versions. Where this register does exist, we will use it & if not fall back onto the compat. string. > SiFive uses an integer version number, even for hard cores[1]. > OpenCores uses an "-rtlsvnN" suffix (isn't svn dead? ;-) At least here, "hardware" people seem to be a fan of it still (sadly?) > No idea what e.g. LiteX and Microwatt are planning. > > [1] Documentation/devicetree/bindings/sifive/sifive-blocks-ip-versioning.txt > > > Gr{oetje,eeting}s, > > Geert > > -- > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org > > In personal conversations with technical people, I call myself a hacker. But > when I'm talking to journalists I just say "programmer" or something like that. > -- Linus Torvalds _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv