From mboxrd@z Thu Jan 1 00:00:00 1970 From: fu.wei@linaro.org (fu.wei at linaro.org) Date: Wed, 22 Mar 2017 00:31:12 +0800 Subject: [PATCH v22 01/11] clocksource: arm_arch_timer: introduce a wrapper function to get the frequency from mmio. In-Reply-To: <20170321163122.9183-1-fu.wei@linaro.org> References: <20170321163122.9183-1-fu.wei@linaro.org> Message-ID: <20170321163122.9183-2-fu.wei@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Fu Wei 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 --- 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