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kernel
os
linux
power: gemini-poweroff: Avoid more spurious poweroffs
Even after the previous fix I have experienced more spurious
poweroffs on the gemini SoC. After this fix it finally seems
to go away.
Fixes: f7a388d6cd1c ("power: reset: Add a driver for the Gemini poweroff")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
authored by
Linus Walleij
and committed by
Sebastian Reichel
ada1de89
09bebb1a
+11
-1
+11
-1
drivers/power/reset/gemini-poweroff.c
+11
-1
drivers/power/reset/gemini-poweroff.c
···
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val |= GEMINI_CTRL_ENABLE;
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writel(val, gpw->base + GEMINI_PWC_CTRLREG);
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-
/* Now that the state machine is active, clear the IRQ */
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+
/* Clear the IRQ */
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+
val = readl(gpw->base + GEMINI_PWC_CTRLREG);
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+
val |= GEMINI_CTRL_IRQ_CLR;
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+
writel(val, gpw->base + GEMINI_PWC_CTRLREG);
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+
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+
/* Wait for this to clear */
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val = readl(gpw->base + GEMINI_PWC_STATREG);
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+
while (val & 0x70U)
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val = readl(gpw->base + GEMINI_PWC_STATREG);
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+
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+
/* Clear the IRQ again */
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val = readl(gpw->base + GEMINI_PWC_CTRLREG);
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val |= GEMINI_CTRL_IRQ_CLR;
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writel(val, gpw->base + GEMINI_PWC_CTRLREG);