64035ac463
Prepare for better device categorization by moving everything to testing subdir first. [skip-ci]: chicken-egg problem: passing pmaports CI depends on pmbootstrap MR depends on this MR Related: postmarketos#16
60 lines
2 KiB
Diff
60 lines
2 KiB
Diff
From 6f64a6f1329e4d61da8f94b4bd68a0a2a62da305 Mon Sep 17 00:00:00 2001
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From: Sergey Larin <cerg2010cerg2010@mail.ru>
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Date: Thu, 20 Jun 2019 19:47:11 +0300
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Subject: [PATCH] ARM: dts: tegra20-glide: Workaround RTC bugs
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MAX8907 has broken RTC on this board - alarm reports
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always-on IRQ, so as a workaround we use Tegra's RTC.
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Signed-off-by: Sergey Larin <cerg2010cerg2010@mail.ru>
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---
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arch/arm/boot/dts/tegra20-glide.dts | 26 +++++++++++++++++++++++---
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1 file changed, 23 insertions(+), 3 deletions(-)
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diff --git a/arch/arm/boot/dts/tegra20-glide.dts b/arch/arm/boot/dts/tegra20-glide.dts
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index 195ccb0a1012..107efb68c99e 100644
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--- a/arch/arm/boot/dts/tegra20-glide.dts
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+++ b/arch/arm/boot/dts/tegra20-glide.dts
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@@ -9,8 +9,9 @@
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compatible = "samsung,i927", "nvidia,tegra20";
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aliases {
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- rtc0 = "/i2c@7000d000/max8907@3c";
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- rtc1 = "/rtc@7000e000";
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+ /* MAX8907 RTC seems to be broken here, so use Tegra's */
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+ rtc0 = "/rtc@7000e000";
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+ rtc1 = "/i2c@7000d000/max8907@3c";
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serial0 = &uartb;
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serial1 = &uarta;
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serial2 = &uartc;
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@@ -585,7 +586,26 @@
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pmic: max8907@3c {
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compatible = "maxim,max8907";
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reg = <0x3c>;
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- interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
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+ /*
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+ * Ints seem to be broken, even on downstream -
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+ * on Whistler board, which uses the same PMIC,
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+ * they're marked as LEVEL_HIGH, however, this
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+ * makes them always-on, so we get something
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+ * like "irq 301: nobody cared" - no interrupt
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+ * status reg set, BUT irq line is asserted, and
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+ * I don't know how to clear it. Probably it
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+ * should be triggered on edge. Downstream
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+ * charger driver triggers charging interrupt
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+ * on TRIGGER_RISING. Oh, no docs available
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+ * on the net.
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+ *
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+ * Downstream kernel also has broken alarm, but
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+ * time readings are correct.
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+ *
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+ * As a workaround, we use internal Tegra RTC
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+ * as a main RTC.
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+ */
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+ interrupts = <GIC_SPI 86 IRQ_TYPE_EDGE_RISING>;
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maxim,system-power-controller;
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--
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2.22.0
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