[PATCH v22 01/11] clocksource: arm_arch_timer: introduce a wrapper function to get the frequency from mmio.
From: fu.wei at linaro.org <hidden>
Date: 2017-03-21 16:32:28
Also in:
linux-acpi, linux-watchdog, lkml
Subsystem:
arm architected timer driver, clocksource, clockevent drivers, the rest · Maintainers:
Mark Rutland, Marc Zyngier, Daniel Lezcano, Thomas Gleixner, Linus Torvalds
From: Fu Wei <redacted> The patch introduce a new functions: arch_timer_mem_get_cntfrq, and applies it in arch_timer_detect_rate. This function will be used for getting the frequency from mmio to prepare for reworking counter frequency detection. Signed-off-by: Fu Wei <redacted> --- drivers/clocksource/arm_arch_timer.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 3faed19..843f923 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c@@ -555,6 +555,11 @@ static int arch_timer_starting_cpu(unsigned int cpu) return 0; } +static u32 arch_timer_mem_get_cntfrq(void __iomem *cntbase) +{ + return readl_relaxed(cntbase + CNTFRQ); +} + static void arch_timer_detect_rate(void __iomem *cntbase, struct device_node *np) {
@@ -569,7 +574,7 @@ arch_timer_detect_rate(void __iomem *cntbase, struct device_node *np) if (!acpi_disabled || of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) { if (cntbase) - arch_timer_rate = readl_relaxed(cntbase + CNTFRQ); + arch_timer_rate = arch_timer_mem_get_cntfrq(cntbase); else arch_timer_rate = arch_timer_get_cntfrq(); }
--
2.9.3