From mboxrd@z Thu Jan 1 00:00:00 1970 From: Magnus Damm Date: Mon, 25 Apr 2011 13:40:26 +0000 Subject: [PATCH] clocksource: sh_tmu: Runtime PM support Message-Id: <20110425134026.4249.13858.sendpatchset@t400s> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-kernel@vger.kernel.org Cc: johnstul@us.ibm.com, Magnus Damm , lethal@linux-sh.org, linux-sh@vger.kernel.org From: Magnus Damm Add Runtime PM support to the TMU driver. The hardware device is enabled as long as the clocksource or the clockevent portion of the driver is used. Signed-off-by: Magnus Damm --- Tested on the sh7372 Mackerel board with TMU00 and TMU01. drivers/clocksource/sh_tmu.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) --- 0010/drivers/clocksource/sh_tmu.c +++ work/drivers/clocksource/sh_tmu.c 2011-04-25 15:13:20.000000000 +0900 @@ -25,6 +25,7 @@ #include #include #include +#include #include #include #include @@ -109,10 +110,12 @@ static int sh_tmu_enable(struct sh_tmu_p { int ret; - /* enable clock */ + /* wake up device and enable clock */ + pm_runtime_get_sync(&p->pdev->dev); ret = clk_enable(p->clk); if (ret) { dev_err(&p->pdev->dev, "cannot enable clock\n"); + pm_runtime_put_sync(&p->pdev->dev); return ret; } @@ -141,8 +144,9 @@ static void sh_tmu_disable(struct sh_tmu /* disable interrupts in TMU block */ sh_tmu_write(p, TCR, 0x0000); - /* stop clock */ + /* stop clock and mark device as idle */ clk_disable(p->clk); + pm_runtime_put_sync(&p->pdev->dev); } static void sh_tmu_set_next(struct sh_tmu_priv *p, unsigned long delta, @@ -411,6 +415,7 @@ static int __devinit sh_tmu_probe(struct if (p) { dev_info(&pdev->dev, "kept as earlytimer\n"); + pm_runtime_enable(&pdev->dev); return 0; } @@ -425,6 +430,9 @@ static int __devinit sh_tmu_probe(struct kfree(p); platform_set_drvdata(pdev, NULL); } + + if (!is_early_platform_device(pdev)) + pm_runtime_enable(&pdev->dev); return ret; }