[PATCH v21 01/13] clocksource: arm_arch_timer: introduce two functions to get the frequency from mmio and sysreg.

Hi Mark,

On 20 March 2017 at 18:41, Mark Rutland [off-list ref] wrote:

On Mon, Mar 20, 2017 at 05:43:29PM +0800, Fu Wei wrote:

quoted

On 20 March 2017 at 15:36, Fu Wei [off-list ref] wrote:

quoted

On 18 March 2017 at 02:05, Mark Rutland [off-list ref] wrote:

quoted

On Tue, Feb 07, 2017 at 02:50:03AM +0800, fu.wei at linaro.org wrote:

quoted

quoted

quoted

quoted

+static u32 arch_timer_get_mmio_freq(void __iomem *cntbase)
+{
+     /*
+      * Try to get the frequency from the CNTFRQ of timer frame registers.
+      * Note: please verify cntbase in caller.
+      */
+     return readl_relaxed(cntbase + CNTFRQ);
+}

Wrapping the MMIO read makes sense if we're going to do this in more
than one place, so I'm happy with this wrapper.

If you can s/arch_timer_get_mmio_freq/arch_timer_get_cntfrq/, and drop

sorry, May I guess that is
"s/arch_timer_get_mmio_freq/arch_timer_get_mmio_cntfrq/"
or
"s/arch_timer_get_mmio_freq/arch_timer_mem_get_cntfrq/"

which one do you prefer? :-)

keeping using arch_timer_get_cntfrq();  for per-CPU arch timer, then

+static u32 arch_timer_mem_get_cntfrq(void __iomem *cntbase)
+{
+       return readl_relaxed(cntbase + CNTFRQ);
+}
+

That looks perfect to me.

Sorry for the confusion above!

Great, thanks , doing this way :-)

Mark.

-- 
Best regards,

Fu Wei
Software Engineer
Red Hat