Re: [PATCH] clocksource/drivers/timer_sun5i: Replace code by clocksource_mmio_init

From: Maxime Ripard
Date: Thu Nov 12 2015 - 13:08:41 EST


Hi Daniel,

On Thu, Nov 12, 2015 at 06:11:18PM +0100, Daniel Lezcano wrote:
> The current code to initialize, register and read the clocksource is
> already factored out in mmio.c via the clocksource_mmio_init function.
>
> The only difference is the readl vs readl_relaxed.
>
> Factor out the code with the clocksource_mmio_init function.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
> ---
> drivers/clocksource/timer-sun5i.c | 16 ++--------------
> 1 file changed, 2 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/clocksource/timer-sun5i.c b/drivers/clocksource/timer-sun5i.c
> index bca9573..dc3793c 100644
> --- a/drivers/clocksource/timer-sun5i.c
> +++ b/drivers/clocksource/timer-sun5i.c
> @@ -152,13 +152,6 @@ static irqreturn_t sun5i_timer_interrupt(int irq, void *dev_id)
> return IRQ_HANDLED;
> }
>
> -static cycle_t sun5i_clksrc_read(struct clocksource *clksrc)
> -{
> - struct sun5i_timer_clksrc *cs = to_sun5i_timer_clksrc(clksrc);
> -
> - return ~readl(cs->timer.base + TIMER_CNTVAL_LO_REG(1));
> -}
> -
> static int sun5i_rate_cb_clksrc(struct notifier_block *nb,
> unsigned long event, void *data)
> {
> @@ -217,13 +210,8 @@ static int __init sun5i_setup_clocksource(struct device_node *node,
> writel(TIMER_CTL_ENABLE | TIMER_CTL_RELOAD,
> base + TIMER_CTL_REG(1));
>
> - cs->clksrc.name = node->name;
> - cs->clksrc.rating = 340;
> - cs->clksrc.read = sun5i_clksrc_read;
> - cs->clksrc.mask = CLOCKSOURCE_MASK(32);
> - cs->clksrc.flags = CLOCK_SOURCE_IS_CONTINUOUS;
> -
> - ret = clocksource_register_hz(&cs->clksrc, rate);
> + ret = clocksource_mmio_init(base + TIMER_CNTVAL_LO_REG(1), node->name,
> + rate, 340, UINT_MAX, clocksource_mmio_readw_down);

Shouldn't it be clocksource_mmio_readl_down?

Thanks!
Maxime

--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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