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From: Samuel Holland <samuel@sholland.org>
To: Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	Jernej Skrabec <jernej.skrabec@siol.net>
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org,
	Samuel Holland <samuel@sholland.org>
Subject: [PATCH 0/2] sunxi: Enforce consistent MMC numbering
Date: Sun, 18 Apr 2021 21:52:44 -0500	[thread overview]
Message-ID: <20210419025246.21722-1-samuel@sholland.org> (raw)

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 ++++++
 3 files changed, 18 insertions(+)

-- 
2.26.3


WARNING: multiple messages have this Message-ID
From: Samuel Holland <samuel@sholland.org>
To: Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	Jernej Skrabec <jernej.skrabec@siol.net>
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org,
	Samuel Holland <samuel@sholland.org>
Subject: [PATCH 0/2] sunxi: Enforce consistent MMC numbering
Date: Sun, 18 Apr 2021 21:52:44 -0500	[thread overview]
Message-ID: <20210419025246.21722-1-samuel@sholland.org> (raw)

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 ++++++
 3 files changed, 18 insertions(+)

-- 
2.26.3


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             reply	other threads:[~2021-04-19  2:52 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-19  2:52 Samuel Holland [this message]
2021-04-19  2:52 ` [PATCH 0/2] sunxi: Enforce consistent MMC numbering 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 ` [PATCH 0/2] sunxi: " Chen-Yu Tsai
2021-04-19  3:17   ` 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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