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

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: fe8e2fb5f64e ("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>

diff --git a/drivers/gpio/gpio-aspeed-sgpio.c b/drivers/gpio/gpio-aspeed-sgpio.c
index 5d678dbf1a62153b2ee9b6877ee3e812a6b75436..a0eb00c024f62d12d331764b7676b7e70dbc896f 100644 (file)
--- a/drivers/gpio/gpio-aspeed-sgpio.c
+++ b/drivers/gpio/gpio-aspeed-sgpio.c
@@ -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;