Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758927AbYCZPxM (ORCPT ); Wed, 26 Mar 2008 11:53:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754786AbYCZPw5 (ORCPT ); Wed, 26 Mar 2008 11:52:57 -0400 Received: from fk-out-0910.google.com ([209.85.128.190]:54535 "EHLO fk-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752485AbYCZPw4 (ORCPT ); Wed, 26 Mar 2008 11:52:56 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=date:from:to:cc:subject:message-id:references:mime-version:content-type:content-disposition:in-reply-to:user-agent; b=rEiH3mrdgWjcNOS7nOPZpbn7wKeOGV7Jeyaz7OaS1U56u2E1Ubfq/zJyzC59lCOQCLbraa4RbdtlCxURhxJ3AETuwKcxCafFcIglmBT5rsC6FhTf/fhKTukSnC/KEiIFNkK2uX8fYN8ocy//kt9Zo+ZKewFug6tIqwNgFFyvhRY= Date: Wed, 26 Mar 2008 18:52:44 +0300 From: Dmitry Baryshkov To: linux-kernel@vger.kernel.org Cc: akpm@linux-foundation.org, hskinnemoen@atmel.com, domen.puncer@telargo.com, lethal@linux-sh.org, tony@atomide.com, rmk+kernel@arm.linux.org.uk, paul@pwsan.com Subject: [PATCH 2/3] Clocklib: debugfs support Message-ID: <20080326155244.GA15418@doriath.ww600.siemens.net> References: <20080326154913.GA15326@doriath.ww600.siemens.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080326154913.GA15326@doriath.ww600.siemens.net> User-Agent: Mutt/1.5.17+20080114 (2008-01-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2635 Lines: 115 Provide /sys/kernel/debug/clock to ease debugging. Signed-off-by: Dmitry Baryshkov --- include/linux/clklib.h | 5 +++ kernel/clklib.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 75 insertions(+), 0 deletions(-) diff --git a/include/linux/clklib.h b/include/linux/clklib.h index 92f0a45..f9c1db4 100644 --- a/include/linux/clklib.h +++ b/include/linux/clklib.h @@ -30,6 +30,11 @@ struct clk { int (*setrate) (struct clk *, unsigned long); long (*roundrate) (struct clk *, unsigned long); + /* + * format any additional info + */ + int (*format) (struct clk *, struct seq_file *); + void *priv; }; diff --git a/kernel/clklib.c b/kernel/clklib.c index b41e7c2..1c52e55 100644 --- a/kernel/clklib.c +++ b/kernel/clklib.c @@ -313,3 +313,73 @@ out: return rc; } EXPORT_SYMBOL(clk_alloc_function); + +#ifdef CONFIG_DEBUG_FS + +#include +#include +static void dump_clocks(struct seq_file *s, struct clk *parent, int nest) +{ + struct clk *clk; + int i; + + list_for_each_entry(clk, &clocks, node) { + if (clk->parent == parent) { + for (i = 0; i < nest; i++) + seq_putc(s, ' '); + seq_puts(s, clk->name); + + i = nest + strlen(clk->name); + if (i >= 16) + i = 15; + for (; i < 16; i++) { + seq_putc(s, ' '); + seq_putc(s, ' '); + } + seq_printf(s, "%c use=%d rate=%10lu Hz", + clk->set_parent ? '*' : ' ', + clk->users, + __clk_get_rate(clk)); + if (clk->format) + clk->format(clk, s); + seq_putc(s, '\n'); + + dump_clocks(s, clk, nest + 1); + } + } +} + +static int clocklib_show(struct seq_file *s, void *unused) +{ + unsigned long flags; + + spin_lock_irqsave(&clocks_lock, flags); + + dump_clocks(s, NULL, 0); + + spin_unlock_irqrestore(&clocks_lock, flags); + + return 0; +} + +static int clocklib_open(struct inode *inode, struct file *file) +{ + return single_open(file, clocklib_show, NULL); +} + +static struct file_operations clocklib_operations = { + .open = clocklib_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int __init clocklib_debugfs_init(void) +{ + debugfs_create_file("clock", S_IFREG | S_IRUGO, + NULL, NULL, &clocklib_operations); + return 0; +} +subsys_initcall(clocklib_debugfs_init); + +#endif /* DEBUG_FS */ -- 1.5.4.4 -- With best wishes Dmitry -- 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/