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gpio/aspeed-sgpio: don't enable all interrupts by default 

[ Upstream commit bf0d394e88 ]

Currently, the IRQ setup for the SGPIO driver enables all interrupts in
dual-edge trigger mode. Since the default handler is handle_bad_irq, any
state change on input GPIOs will trigger bad IRQ warnings.

This change applies sensible IRQ defaults: single-edge trigger, and all
IRQs disabled.

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Fixes: 7db47faae7 ("gpio: aspeed: Add SGPIO driver")
Reviewed-by: Joel Stanley <joel@jms.id.au>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Jeremy Kerr 2020-09-11 09:51:05 +08:00 committed by Greg Kroah-Hartman
parent 8323d1e090
commit f2a2380812
1 changed files with 3 additions and 5 deletions
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8
drivers/gpio/sgpio-aspeed.c
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@ -452,17 +452,15 @@ static int aspeed_sgpio_setup_irqs(struct aspeed_sgpio *gpio,
irq->parents = &gpio->irq;
irq->num_parents = 1;
/* set IRQ settings and Enable Interrupt */
/* Apply default IRQ settings */
for (i = 0; i < ARRAY_SIZE(aspeed_sgpio_banks); i++) {
bank = &aspeed_sgpio_banks[i];
/* set falling or level-low irq */
iowrite32(0x00000000, bank_reg(gpio, bank, reg_irq_type0));
/* trigger type is edge */
iowrite32(0x00000000, bank_reg(gpio, bank, reg_irq_type1));
/* dual edge trigger mode. */
iowrite32(0xffffffff, bank_reg(gpio, bank, reg_irq_type2));
/* enable irq */
iowrite32(0xffffffff, bank_reg(gpio, bank, reg_irq_enable));
/* single edge trigger */
iowrite32(0x00000000, bank_reg(gpio, bank, reg_irq_type2));
}
return 0;