drivers/clk/xmega_pr.c

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#include <clk/sys.h>
#include <chip/memory-map.h>
#include <interrupt.h>

void sysclk_enable_module(uint8_t port, uint8_t id)
{
        irqflags_t iflags;
        uint8_t mask;

        iflags = cpu_irq_save();
        mask = mmio_read8((void *)(PR_BASE + port));
        mask &= ~id;
        mmio_write8((void *)(PR_BASE + port), mask);
        cpu_irq_restore(iflags);
}

void sysclk_disable_module(uint8_t port, uint8_t id)
{
        irqflags_t iflags;
        uint8_t mask;

        iflags = cpu_irq_save();
        mask = mmio_read8((void *)(PR_BASE + port));
        mask |= id;
        mmio_write8((void *)(PR_BASE + port), mask);
        cpu_irq_restore(iflags);
}

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