From: Chen-Yu Tsai <wens@csie.org> To: Samuel Holland <samuel@sholland.org> Cc: Maxime Ripard <mripard@kernel.org>, Jernej Skrabec <jernej.skrabec@siol.net>, devicetree <devicetree@vger.kernel.org>, linux-arm-kernel <linux-arm-kernel@lists.infradead.org>, linux-sunxi@lists.linux.dev, linux-kernel <linux-kernel@vger.kernel.org> Subject: Re: [PATCH 0/2] sunxi: Enforce consistent MMC numbering Date: Mon, 19 Apr 2021 11:17:19 +0800 [thread overview] Message-ID: <CAGb2v642Z3iH7fUWa31Rb5j+nWdZ=sXn2BYw3_dyE9P6iuL0Cg@mail.gmail.com> (raw) In-Reply-To: <20210419025246.21722-1-samuel@sholland.org> Hi, On Mon, Apr 19, 2021 at 10:52 AM Samuel Holland <samuel@sholland.org> wrote: > > Dealing with the inconsistent numbering has been a major pain, and > there is a solution with (as far as I can tell) no tangible downsides. > So let's use it. > > Yes, I know the kernel supports UUIDs for root=. But UUIDs do not help > when referencing the whole, unpartitioned device, like is needed for > updating the bootloader and firmware. So for the use case of "write a > bootloader to the SD card, regardless of where the board is currently > booted from", I know of two options: > - Dig around in sysfs to find the mmc number from the MMIO address, > which means I have to know the MMIO addresses for every SoC, or > - Apply patches like these. > > Samuel Holland (2): > ARM: dts: sunxi: h3/h5: Enforce consistent MMC numbering > arm64: dts: allwinner: Enforce consistent MMC numbering > > arch/arm/boot/dts/sunxi-h3-h5.dtsi | 6 ++++++ > arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 6 ++++++ > arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 6 ++++++ At least with Rockchip this is now done at the board level. IIRC it was a request from other people to not do it at the SoC level. I don't recall exactly who though. ChenYu > 3 files changed, 18 insertions(+) > > -- > 2.26.3 > >
WARNING: multiple messages have this Message-ID (diff)
From: Chen-Yu Tsai <wens@csie.org> To: Samuel Holland <samuel@sholland.org> Cc: Maxime Ripard <mripard@kernel.org>, Jernej Skrabec <jernej.skrabec@siol.net>, devicetree <devicetree@vger.kernel.org>, linux-arm-kernel <linux-arm-kernel@lists.infradead.org>, linux-sunxi@lists.linux.dev, linux-kernel <linux-kernel@vger.kernel.org> Subject: Re: [PATCH 0/2] sunxi: Enforce consistent MMC numbering Date: Mon, 19 Apr 2021 11:17:19 +0800 [thread overview] Message-ID: <CAGb2v642Z3iH7fUWa31Rb5j+nWdZ=sXn2BYw3_dyE9P6iuL0Cg@mail.gmail.com> (raw) In-Reply-To: <20210419025246.21722-1-samuel@sholland.org> Hi, On Mon, Apr 19, 2021 at 10:52 AM Samuel Holland <samuel@sholland.org> wrote: > > Dealing with the inconsistent numbering has been a major pain, and > there is a solution with (as far as I can tell) no tangible downsides. > So let's use it. > > Yes, I know the kernel supports UUIDs for root=. But UUIDs do not help > when referencing the whole, unpartitioned device, like is needed for > updating the bootloader and firmware. So for the use case of "write a > bootloader to the SD card, regardless of where the board is currently > booted from", I know of two options: > - Dig around in sysfs to find the mmc number from the MMIO address, > which means I have to know the MMIO addresses for every SoC, or > - Apply patches like these. > > Samuel Holland (2): > ARM: dts: sunxi: h3/h5: Enforce consistent MMC numbering > arm64: dts: allwinner: Enforce consistent MMC numbering > > arch/arm/boot/dts/sunxi-h3-h5.dtsi | 6 ++++++ > arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 6 ++++++ > arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 6 ++++++ At least with Rockchip this is now done at the board level. IIRC it was a request from other people to not do it at the SoC level. I don't recall exactly who though. ChenYu > 3 files changed, 18 insertions(+) > > -- > 2.26.3 > > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-04-19 3:17 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-19 2:52 [PATCH 0/2] sunxi: Enforce consistent MMC numbering Samuel Holland 2021-04-19 2:52 ` Samuel Holland 2021-04-19 2:52 ` [PATCH 1/2] ARM: dts: sunxi: h3/h5: " Samuel Holland 2021-04-19 2:52 ` Samuel Holland 2021-04-19 2:52 ` [PATCH 2/2] arm64: dts: allwinner: " Samuel Holland 2021-04-19 2:52 ` Samuel Holland 2021-04-19 3:17 ` Chen-Yu Tsai [this message] 2021-04-19 3:17 ` [PATCH 0/2] sunxi: " Chen-Yu Tsai 2021-04-19 3:17 ` Chen-Yu Tsai 2021-04-19 8:54 ` Andre Przywara 2021-04-19 8:54 ` Andre Przywara 2021-04-30 9:10 ` Maxime Ripard 2021-04-30 9:10 ` Maxime Ripard 2021-04-30 10:55 ` Andre Przywara 2021-04-30 10:55 ` Andre Przywara 2021-05-24 13:56 ` Maxime Ripard 2021-05-24 13:56 ` Maxime Ripard
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