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pinctrl: rockchip: Enhance support for IRQ_TYPE_EDGE_BOTH

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[ Upstream commit b871656aa4f54e04207f62bdd0d7572be1d86b36 ]

Switching between falling/rising edges for IRQ_TYPE_EDGE_BOTH on pins that
require debounce can cause the device to lose events due to a desync
between pin state and irq type.

This problem is resolved by switching between IRQ_TYPE_LEVEL_LOW and
IRQ_TYPE_LEVEL_HIGH instead.

Fixes: 936ee2675e ("gpio/rockchip: add driver for rockchip gpio")
Signed-off-by: João H. Spies <jhlspies@gmail.com>
Link: https://lore.kernel.org/r/20220808025121.110223-1-jhlspies@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
João H. Spies
2022-08-08 02:51:20 +00:00
committed by Greg Kroah-Hartman
parent 30fccb4fe4
commit ca2b798e53
1 changed files with 2 additions and 2 deletions
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4
drivers/gpio/gpio-rockchip.c
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@@ -418,11 +418,11 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
goto out;
} else {
bank->toggle_edge_mode |= mask;
level |= mask;
level &= ~mask;
/*
* Determine gpio state. If 1 next interrupt should be
* falling otherwise rising.
* low otherwise high.
*/
data = readl(bank->reg_base + bank->gpio_regs->ext_port);
if (data & mask)