On 21/10/2021 08:18, Youngmin Nam wrote:
> Exynos MCT version 2 is composed of 1 FRC and 12 comparators.
> The 12 comparators can produces interrupts independently,
> so they can be used as local timer of each CPU.
>
...
> +
> +static void exynos_mct_comp_start(struct mct_clock_event_device *mevt,
> + bool periodic, unsigned long cycles)
> +{
> + unsigned int index = mevt->comp_index;
> + unsigned int comp_enable;
> + unsigned int loop_cnt = 0;
> +
> + comp_enable = readl_relaxed(reg_base + EXYNOS_MCT_COMP_ENABLE(index));
> + if (comp_enable == MCT_COMP_ENABLE)
> + exynos_mct_comp_stop(mevt);
> +
> + if (periodic)
> + writel_relaxed(MCT_COMP_CIRCULAR_MODE, reg_base + EXYNOS_MCT_COMP_MODE(index));
> +
> + writel_relaxed(cycles, reg_base + EXYNOS_MCT_COMP_PERIOD(index));
This is unsigned long, so 64-bit on your platform. Use writeq_relaxed or
handle it somehow.
Best regards,
Krzysztof
