Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758193Ab1DYNdn (ORCPT ); Mon, 25 Apr 2011 09:33:43 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:52566 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754672Ab1DYNdm (ORCPT ); Mon, 25 Apr 2011 09:33:42 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:date:message-id:subject; b=a1DoHgEN+WN3rW0b3ISZGLhYKFpX7CFD6TXjUdxvlniD57ns8qcBiWZPP0wEXVNSy8 Rn07/uxpkXRg0uTMJCjmGsL1jisrUo6v7By73KGx2XIwjtDQ1NecZWQLyRhsFxOhwtvj JdOQsJFshPIdt3x6BqvgnqV4eqpQP0rVnAYq4= From: Magnus Damm To: linux-kernel@vger.kernel.org Cc: johnstul@us.ibm.com, Magnus Damm , lethal@linux-sh.org, linux-sh@vger.kernel.org Date: Mon, 25 Apr 2011 22:40:26 +0900 Message-Id: <20110425134026.4249.13858.sendpatchset@t400s> Subject: [PATCH] clocksource: sh_tmu: Runtime PM support Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2016 Lines: 73 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; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/