diff options
| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2013-12-14 07:07:32 +0100 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2013-12-18 15:13:50 +0100 |
| commit | 57dee992df244ccce6a6a3a88a43160e285da5d8 (patch) | |
| tree | e49a842874965835a97b77929fc6c455ccc98a4e /drivers/clocksource | |
| parent | Linux 3.13-rc2 (diff) | |
| download | linux-57dee992df244ccce6a6a3a88a43160e285da5d8.tar.xz linux-57dee992df244ccce6a6a3a88a43160e285da5d8.zip | |
clocksource: sh_cmt: Add clk_prepare/unprepare support
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>
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/sh_cmt.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c index 0965e9848b3d..940341a185d7 100644 --- a/drivers/clocksource/sh_cmt.c +++ b/drivers/clocksource/sh_cmt.c @@ -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: |