| Message ID | 20170206185015.12296-4-fu.wei@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Tue, Feb 07, 2017 at 02:50:05AM +0800, fu.wei@linaro.org wrote: > From: Fu Wei <fu.wei@linaro.org> > > The original counter frequency detection call(arch_timer_detect_rate) > include getting the frequency from the per-cpu arch-timer and the > memory-mapped (MMIO) timer interfaces. But they will be needed only when > the system initializes the relevant timer. > > This patch remove arch_timer_detect_rate founction, and use the > arch_timer_get_sysreg_freq and arch_timer_get_mmio_freq directly. > > Signed-off-by: Fu Wei <fu.wei@linaro.org> Could you please fold this with the prior patch? > @@ -1087,7 +1072,12 @@ static int __init arch_timer_mem_init(struct device_node *np) > */ > if (!arch_timer_rate && > of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) > - arch_timer_detect_rate(base); > + arch_timer_rate = arch_timer_get_mmio_freq(base); > + if (!arch_timer_rate) { > + pr_err(FW_BUG "frequency not available for MMIO timer.\n"); It would be better to say "MMIO frequency not available.\n" here. Thanks, Mark. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Mark, On 18 March 2017 at 02:07, Mark Rutland <mark.rutland@arm.com> wrote: > On Tue, Feb 07, 2017 at 02:50:05AM +0800, fu.wei@linaro.org wrote: >> From: Fu Wei <fu.wei@linaro.org> >> >> The original counter frequency detection call(arch_timer_detect_rate) >> include getting the frequency from the per-cpu arch-timer and the >> memory-mapped (MMIO) timer interfaces. But they will be needed only when >> the system initializes the relevant timer. >> >> This patch remove arch_timer_detect_rate founction, and use the >> arch_timer_get_sysreg_freq and arch_timer_get_mmio_freq directly. >> >> Signed-off-by: Fu Wei <fu.wei@linaro.org> > > Could you please fold this with the prior patch? Sure, will do > >> @@ -1087,7 +1072,12 @@ static int __init arch_timer_mem_init(struct device_node *np) >> */ >> if (!arch_timer_rate && >> of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) >> - arch_timer_detect_rate(base); >> + arch_timer_rate = arch_timer_get_mmio_freq(base); >> + if (!arch_timer_rate) { >> + pr_err(FW_BUG "frequency not available for MMIO timer.\n"); > > It would be better to say "MMIO frequency not available.\n" here. thanks , will do > > Thanks, > Mark.
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index aa14305..63fb441 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -571,25 +571,6 @@ static u32 arch_timer_get_mmio_freq(void __iomem *cntbase) return readl_relaxed(cntbase + CNTFRQ); } -static void arch_timer_detect_rate(void __iomem *cntbase) -{ - /* Who has more than one independent system counter? */ - if (arch_timer_rate) - return; - - /* - * Try to determine the frequency from the MMIO timer or the sysreg. - */ - if (cntbase) - arch_timer_rate = arch_timer_get_mmio_freq(cntbase); - else - arch_timer_rate = arch_timer_get_sysreg_freq(); - - /* Check the timer frequency. */ - if (arch_timer_rate == 0) - pr_warn("frequency not available\n"); -} - static void arch_timer_banner(unsigned type) { pr_info("%s%s%s timer(s) running at %lu.%02luMHz (%s%s%s).\n", @@ -970,7 +951,11 @@ static int __init arch_timer_of_init(struct device_node *np) */ if (!arch_timer_rate && of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) - arch_timer_detect_rate(NULL); + arch_timer_rate = arch_timer_get_sysreg_freq(); + if (!arch_timer_rate) { + pr_err(FW_BUG "frequency not available.\n"); + return -EINVAL; + } arch_timer_c3stop = !of_property_read_bool(np, "always-on"); @@ -1087,7 +1072,12 @@ static int __init arch_timer_mem_init(struct device_node *np) */ if (!arch_timer_rate && of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) - arch_timer_detect_rate(base); + arch_timer_rate = arch_timer_get_mmio_freq(base); + if (!arch_timer_rate) { + pr_err(FW_BUG "frequency not available for MMIO timer.\n"); + ret = -EINVAL; + goto out; + } ret = arch_timer_mem_register(base, irq); if (ret) @@ -1150,7 +1140,11 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table) gtdt->non_secure_el2_flags); /* Get the frequency from the sysreg CNTFRQ */ - arch_timer_detect_rate(NULL); + arch_timer_rate = arch_timer_get_sysreg_freq(); + if (!arch_timer_rate) { + pr_err(FW_BUG "frequency not available.\n"); + return -EINVAL; + } arch_timer_uses_ppi = arch_timer_select_ppi(); if (!arch_timer_ppi[arch_timer_uses_ppi]) {