From: Igor Velkov <iav@iav.lv>
To: Christian Hewitt <christianshewitt@gmail.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Dongjin Kim <tobetter@gmail.com>,
Eric Neulight <Eric.Neulight@linuxdev.slmail.me>,
linux-mmc@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org,
Igor Velkov <iav@iav.lv>
Subject: Re: [PATCH] arm64: dts: amlogic: meson-sm1-odroid: let the SD card be powered down
Date: Mon, 02 Nov 2026 20:38:31 +0200 [thread overview]
Message-ID: <20261102-hc4-sd-hewitt-reply-1@iav.lv> (raw)
In-Reply-To: <AD1E9AE8-8FA9-4CC2-AED8-AB2F455FA8E2@gmail.com>
Hi Christian,
For HC4 I sent the U-Boot side on Oct 13 [1]: the same idea as your
first patch, plus u-boot,off-on-delay-us = <100000> on TFLASH_VDD.
Without it mmc_power_cycle() keeps the supply off for only 2 ms. With it
HC4 boots from SD after a watchdog reset 3/3 (0/3 before), so the delay
may be worth a try on VIM1S.
On ODROID-N2 the factory BL2 leaves DELAY1/DELAY2/ADJUST at 0, so I
haven't seen your second issue there.
[1] https://lore.kernel.org/r/20261013-b4-hc4-sd-power-cycle-v1-1-cde760a256a5@iav.lv
--
Igor Velkov
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prev parent reply other threads:[~2026-11-02 18:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-03 3:15 Igor Velkov via B4 Relay
2026-10-03 3:22 ` sashiko-bot
2026-10-03 5:31 ` Igor Velkov
2026-10-07 21:05 ` Igor Velkov
2026-10-08 0:07 ` Christian Hewitt
2026-11-02 18:38 ` Igor Velkov [this message]
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