| Message ID | 20181018095708.1527-5-m.szyprowski@samsung.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Proper arch timer support for Exynos5433-based TM2(e) boards | expand |
On Thu, 18 Oct 2018 at 11:57, Marek Szyprowski <m.szyprowski@samsung.com> wrote: > > To get ARM Architected Timers working on Samsung Exynos SoCs, one has to > first configure and enable Exynos Multi-Core Timer, because they both > share some common hardware blocks (global system counter). This patch > adds a mode of cooperation with arch_timer driver, so kernel can use > CP15 based timer interface via arch_timer driver, which is mandatory > on ARM64. In such mode MCT driver only enables its clocks and starts > global timer. Everything else will be handled by arch_timer driver. > > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> > Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> > Tested-by: Chanwoo Choi <cw00.choi@samsung.com> > --- > drivers/clocksource/exynos_mct.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Best regards, Krzysztof
diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c index 4c886ff2941a..1f5249fb25fd 100644 --- a/drivers/clocksource/exynos_mct.c +++ b/drivers/clocksource/exynos_mct.c @@ -606,6 +606,16 @@ static int __init mct_init_dt(struct device_node *np, unsigned int int_type) if (ret) return ret; + if (IS_ENABLED(CONFIG_ARM64) && IS_ENABLED(CONFIG_ARM_ARCH_TIMER)) { + struct device_node *np = of_find_compatible_node(NULL, NULL, + "arm,armv8-timer"); + if (np) { + of_node_put(np); + exynos4_mct_frc_start(); + return 0; + } + } + ret = exynos4_timer_interrupts(np, int_type); if (ret) return ret;