• Grant Likely's avatar
    powerpc/5200: Rework GPT driver to also be an IRQ controller · 5496eab2
    Grant Likely authored
    This patch adds IRQ controller support to the MPC5200 General
    Purpose Timer (GPT) device driver.  With this patch the mpc5200-gpt
    driver supports both GPIO and IRQ functions.
    
    The GPT driver was contained within the mpc52xx_gpio.c file, but this
    patch moves it out into a new file (mpc52xx_gpt.c) since it has more
    than just GPIO functionality now and it was only grouped with the
    mpc52xx-gpio drivers as a matter of convenience before.  Also, this
    driver will most likely get extended again to also provide support
    for the timer function.
    
    Implementation note: Alternately, I could have tried to implement
    the IRQ support as a separate driver and left the GPIO portion alone.
    However, multiple functions of this device (ie. GPIO input+interrupt
    controller, or timer+GPIO) can be active at the same time and the
    registers are shared so it is safer to contain all functionality
    within a single driver.
    Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
    Reviewed-by: default avatarWolfram Sang <w.sang@pengutronix.de>
    5496eab2
mpc52xx_gpt.c 12.5 KB