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SubjectRe: [PATCH v3 3/8] clocksource/drivers/tegra: Set and use timer's period
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18.06.2019 19:32, Jon Hunter пишет:
>
> On 18/06/2019 15:03, Dmitry Osipenko wrote:
>> The of_clk structure has a period field that is set up initially by
>> timer_of_clk_init(), that period value need to be adjusted for a case of
>> TIMER1-9 that are running at a fixed rate that doesn't match the clock's
>> rate. Note that the period value is currently used only by some of the
>> clocksource drivers internally and hence this is just a minor cleanup
>> change that doesn't fix anything.
>>
>> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
>> ---
>> drivers/clocksource/timer-tegra.c | 5 +++--
>> 1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/clocksource/timer-tegra.c b/drivers/clocksource/timer-tegra.c
>> index ff5a4ccb5d52..e6221e070499 100644
>> --- a/drivers/clocksource/timer-tegra.c
>> +++ b/drivers/clocksource/timer-tegra.c
>> @@ -71,9 +71,9 @@ static int tegra_timer_shutdown(struct clock_event_device *evt)
>> static int tegra_timer_set_periodic(struct clock_event_device *evt)
>> {
>> void __iomem *reg_base = timer_of_base(to_timer_of(evt));
>> + unsigned long period = timer_of_period(to_timer_of(evt));
>>
>> - writel_relaxed(TIMER_PTV_EN | TIMER_PTV_PER |
>> - ((timer_of_rate(to_timer_of(evt)) / HZ) - 1),
>> + writel_relaxed(TIMER_PTV_EN | TIMER_PTV_PER | (period - 1),
>> reg_base + TIMER_PTV);
>>
>> return 0;
>> @@ -297,6 +297,7 @@ static int __init tegra_init_timer(struct device_node *np, bool tegra20,
>> cpu_to->clkevt.rating = rating;
>> cpu_to->clkevt.cpumask = cpumask_of(cpu);
>> cpu_to->of_base.base = timer_reg_base + base;
>> + cpu_to->of_clk.period = rate / HZ;
>> cpu_to->of_clk.rate = rate;
>>
>> irq_set_status_flags(cpu_to->clkevt.irq, IRQ_NOAUTOEN);
>
> Acked-by: Jon Hunter <jonathanh@nvidia.com>

Thanks!

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