From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752596Ab2GIHmK (ORCPT ); Mon, 9 Jul 2012 03:42:10 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:50409 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751729Ab2GIHmI (ORCPT ); Mon, 9 Jul 2012 03:42:08 -0400 Date: Mon, 9 Jul 2012 09:41:58 +0200 From: Sascha Hauer To: Fabio Estevam Cc: kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, "Theodore Ts'o" , linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] hw_random: mxc-rnga: Adapt clocks to new i.mx clock framework Message-ID: <20120709074158.GS30009@pengutronix.de> References: <1341606020-26449-1-git-send-email-fabio.estevam@freescale.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1341606020-26449-1-git-send-email-fabio.estevam@freescale.com> X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Uptime: 09:36:53 up 15 days, 22:48, 42 users, load average: 0.23, 0.48, 0.59 User-Agent: Mutt/1.5.21 (2010-09-15) X-SA-Exim-Connect-IP: 2001:6f8:1178:2:21e:67ff:fe11:9c5c X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 06, 2012 at 05:20:19PM -0300, Fabio Estevam wrote: > Cc: Theodore Ts'o > Cc: Herbert Xu > Cc: > Signed-off-by: Fabio Estevam > --- > drivers/char/hw_random/mxc-rnga.c | 8 ++++---- > 1 files changed, 4 insertions(+), 4 deletions(-) > > diff --git a/drivers/char/hw_random/mxc-rnga.c b/drivers/char/hw_random/mxc-rnga.c > index 85074de..c49c0b8 100644 > --- a/drivers/char/hw_random/mxc-rnga.c > +++ b/drivers/char/hw_random/mxc-rnga.c > @@ -152,14 +152,14 @@ static int __init mxc_rnga_probe(struct platform_device *pdev) > if (rng_dev) > return -EBUSY; > > - clk = clk_get(&pdev->dev, "rng"); > + clk = clk_get(&pdev->dev, NULL); > if (IS_ERR(clk)) { > dev_err(&pdev->dev, "Could not get rng_clk!\n"); > err = PTR_ERR(clk); > goto out; > } > > - clk_enable(clk); > + clk_prepare_enable(clk); > > res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > if (!res) { > @@ -201,7 +201,7 @@ err_ioremap: > release_mem_region(res->start, resource_size(res)); > > err_region: > - clk_disable(clk); > + clk_disable_unprepare(clk); > clk_put(clk); > > out: > @@ -212,7 +212,7 @@ static int __exit mxc_rnga_remove(struct platform_device *pdev) > { > struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > void __iomem *rng_base = (void __iomem *)mxc_rnga.priv; > - struct clk *clk = clk_get(&pdev->dev, "rng"); > + struct clk *clk = clk_get(&pdev->dev, NULL); Uhh, that's a driver bug that should be fixed. Although right now there is no reference counting for clocks, the driver should keep the clk internally instead of simply calling clk_get whenever it needs access to a clk. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |