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clocksource: sh_cmt: Add clk_prepare/unprepare support

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Prepare the clock at probe time, as there is no other appropriate place
in the driver where we're allowed to sleep.

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This commit is contained in:
Laurent Pinchart 2013-12-14 15:07:32 +09:00 • committed by Daniel Lezcano
parent dc1ccc4815
commit 57dee992df
1 changed files with 16 additions and 4 deletions
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20
drivers/clocksource/sh_cmt.c
View file

@ -634,12 +634,18 @@ static int sh_cmt_clock_event_next(unsigned long delta,
static void sh_cmt_clock_event_suspend(struct clock_event_device *ced)
{
pm_genpd_syscore_poweroff(&ced_to_sh_cmt(ced)->pdev->dev);
struct sh_cmt_priv *p = ced_to_sh_cmt(ced);
pm_genpd_syscore_poweroff(&p->pdev->dev);
clk_unprepare(p->clk);
}
static void sh_cmt_clock_event_resume(struct clock_event_device *ced)
{
pm_genpd_syscore_poweron(&ced_to_sh_cmt(ced)->pdev->dev);
struct sh_cmt_priv *p = ced_to_sh_cmt(ced);
clk_prepare(p->clk);
pm_genpd_syscore_poweron(&p->pdev->dev);
}
static void sh_cmt_register_clockevent(struct sh_cmt_priv *p,
@ -737,6 +743,10 @@ static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev)
goto err2;
}
ret = clk_prepare(p->clk);
if (ret < 0)
goto err3;
if (res2 && (resource_size(res2) == 4)) {
/* assume both CMSTR and CMCSR to be 32-bit */
p->read_control = sh_cmt_read32;
@ -773,19 +783,21 @@ static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev)
cfg->clocksource_rating);
if (ret) {
dev_err(&p->pdev->dev, "registration failed\n");
goto err3;
goto err4;
}
p->cs_enabled = false;
ret = setup_irq(irq, &p->irqaction);
if (ret) {
dev_err(&p->pdev->dev, "failed to request irq %d\n", irq);
goto err3;
goto err4;
}
platform_set_drvdata(pdev, p);
return 0;
err4:
clk_unprepare(p->clk);
err3:
clk_put(p->clk);
err2: