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Commit 57dee992 authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Daniel Lezcano
Browse files

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: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
parent dc1ccc48

drivers/clocksource/sh_cmt.c

+16 −4
Original line number Diff line number Diff line
@@ -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: