From: Zhang Ying-22455 <[email protected]> The GPIO Input Buffer Enable register is used to control the input enable of each individual GPIO port. When an individual GPIO port’s direction is set to input (GPIO_GPDIR[DRn=0]), the associated input enable must be set (GPIOxGPIE[IEn]=1) to propagate the port value to the GPIO Data Register.
This patch enable port input and interrupt. Signed-off-by: Zhang Ying-22455 <[email protected]> --- drivers/gpio/gpio-mpc8xxx.c | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c index 793518a..f97cd23 100644 --- a/drivers/gpio/gpio-mpc8xxx.c +++ b/drivers/gpio/gpio-mpc8xxx.c @@ -362,9 +362,10 @@ static int mpc8xxx_probe(struct platform_device *pdev) if (!mpc8xxx_gc->irq) return 0; - /* ack and mask all irqs */ + /* ack and enable irqs */ gc->write_reg(mpc8xxx_gc->regs + GPIO_IER, 0xffffffff); - gc->write_reg(mpc8xxx_gc->regs + GPIO_IMR, 0); + gc->write_reg(mpc8xxx_gc->regs + GPIO_IMR, 0xffffffff); + gc->write_reg(mpc8xxx_gc->regs + GPIO_ICR2, 0xffffffff); irq_set_chained_handler_and_data(mpc8xxx_gc->irqn, mpc8xxx_gpio_irq_cascade, mpc8xxx_gc); -- 1.7.1
