Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755686Ab0GLChl (ORCPT ); Sun, 11 Jul 2010 22:37:41 -0400 Received: from ozlabs.org ([203.10.76.45]:49153 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755560Ab0GLChj (ORCPT ); Sun, 11 Jul 2010 22:37:39 -0400 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [PATCH 2/2] clk: Generic support for fixed-rate clocks Message-Id: <1278902245.966134.443547423568.2.gpush@pororo> In-Reply-To: <1278902245.965352.293245076889.0.gpush@pororo> To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Ben Herrenchmidt From: Jeremy Kerr Date: Mon, 12 Jul 2010 10:37:25 +0800 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1621 Lines: 61 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 --- include/linux/clk.h | 13 +++++++++++++ kernel/clk.c | 14 ++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/include/linux/clk.h b/include/linux/clk.h index a95cc82..85e1d44 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -90,6 +90,19 @@ static inline void clk_common_init(struct clk *clk) clk->enable_count = 0; } +/* Simple fixed-rate clock */ +struct clk_fixed { + struct clk clk; + unsigned long rate; +}; + +extern struct clk_ops clk_fixed_ops; + +#define INIT_CLK_FIXED(r) { \ + .clk = INIT_CLK(clk_fixed_ops), \ + .rate = (r) \ +} + #else /* !CONFIG_USE_COMMON_STRUCT_CLK */ /* diff --git a/kernel/clk.c b/kernel/clk.c index cdea25f..32f25ef 100644 --- a/kernel/clk.c +++ b/kernel/clk.c @@ -99,3 +99,17 @@ 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); -- 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/