Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752476Ab1BGGIp (ORCPT ); Mon, 7 Feb 2011 01:08:45 -0500 Received: from ozlabs.org ([203.10.76.45]:35573 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752147Ab1BGGI3 (ORCPT ); Mon, 7 Feb 2011 01:08:29 -0500 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [RFC,PATCH 2/3] clk: Generic support for fixed-rate clocks Message-Id: <1297058877.800455.891273153193.2.gpush@pororo> In-Reply-To: <201102011711.31258.jeremy.kerr@canonical.com> To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Nicolas Pitre , Dima Zavin , Lorenzo Pieralisi , Vincent Guittot , , Ben Herrenschmidt , Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= , Sascha Hauer , Paul Mundt , Saravana Kannan , Ben Dooks , Jeremy Kerr , Russell King From: Jeremy Kerr Date: Mon, 07 Feb 2011 14:07:57 +0800 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1762 Lines: 64 Since most platforms will need a fixed-rate clock, add one. This will also serve as a basic example of an implementation of struct clk. Signed-off-by: Jeremy Kerr --- drivers/clk/clk.c | 14 ++++++++++++++ include/linux/clk.h | 16 ++++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 12e0daf..51dbd33 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -132,3 +132,17 @@ struct clk *clk_get_parent(struct clk *clk) return ERR_PTR(-ENOSYS); } EXPORT_SYMBOL_GPL(clk_get_parent); + +/* clk_fixed support */ + +#define to_clk_fixed(clk) (container_of(clk, struct clk_fixed, clk)) + +static unsigned long clk_fixed_get_rate(struct clk *clk) +{ + return to_clk_fixed(clk)->rate; +} + +struct clk_ops clk_fixed_ops = { + .get_rate = clk_fixed_get_rate, +}; +EXPORT_SYMBOL_GPL(clk_fixed_ops); diff --git a/include/linux/clk.h b/include/linux/clk.h index e081ca1..daa2d5a 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -176,6 +176,22 @@ static inline void clk_common_init(struct clk *clk) mutex_init(&clk->prepare_lock); } +/* Simple fixed-rate clock */ +struct clk_fixed { + struct clk clk; + unsigned long rate; +}; + +extern struct clk_ops clk_fixed_ops; + +#define INIT_CLK_FIXED(name, r) { \ + .clk = INIT_CLK(name.clk, clk_fixed_ops), \ + .rate = (r) \ +} + +#define DEFINE_CLK_FIXED(name, r) \ + struct clk_fixed name = INIT_CLK_FIXED(name, r) + #else /* !CONFIG_USE_COMMON_STRUCT_CLK */ /* -- 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/