• Phil Elwell's avatar
    pinctrl: bcm2835: Fix ints for GPIOs 28-31 & 46-53 · 00445b5d
    Phil Elwell authored
    Contrary to the documentation, the BCM2835 GPIO controller actually
    has four interrupt lines - one each for the three IRQ groups and one
    common. Confusingly, the GPIO interrupt groups don't correspond
    directly with the GPIO control banks. Instead, GPIOs 0-27 generate IRQ
    GPIO0, 28-45 IRQ GPIO1 and 46-53 IRQ GPIO2.
    
    Awkwardly, the GPIOs for IRQ GPIO1 straddle two 32-entry GPIO banks,
    so split out a function to process the interrupts for a single GPIO
    bank.
    
    Cc: Stefan Wahren <stefan.wahren@i2se.com>
    Cc: Stephen Warren <swarren@wwwdotorg.org>
    Signed-off-by: default avatarPhil Elwell <phil@raspberrypi.org>
    Acked-by: default avatarEric Anholt <eric@anholt.net>
    Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
    00445b5d
pinctrl-bcm2835.c 28.7 KB