From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752703AbbL1KZh (ORCPT ); Mon, 28 Dec 2015 05:25:37 -0500 Received: from conuserg009.nifty.com ([202.248.44.35]:46757 "EHLO conuserg009-v.nifty.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752123AbbL1KW5 (ORCPT ); Mon, 28 Dec 2015 05:22:57 -0500 X-Nifty-SrcIP: [153.142.97.90] From: Masahiro Yamada To: linux-clk@vger.kernel.org Cc: Masahiro Yamada , Stephen Boyd , Michael Turquette , linux-kernel@vger.kernel.org Subject: [RESEND PATCH v2 11/16] clk: simplify __clk_init_parent() Date: Mon, 28 Dec 2015 19:23:05 +0900 Message-Id: <1451298191-30815-12-git-send-email-yamada.masahiro@socionext.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1451298191-30815-1-git-send-email-yamada.masahiro@socionext.com> References: <1451298191-30815-1-git-send-email-yamada.masahiro@socionext.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The translation from the index into clk_core is done by clk_core_get_parent_by_index(). The if-block for num_parents == 1 case is duplicating the code in the clk_core_get_parent_by_index(). Drop the "if (num_parents == 1)" from the special case. Instead, set the index to zero if .get_parent() is missing. Signed-off-by: Masahiro Yamada --- Changes in v2: None drivers/clk/clk.c | 38 ++++---------------------------------- 1 file changed, 4 insertions(+), 34 deletions(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 4ad0a36..03b87d8 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -1651,44 +1651,14 @@ struct clk *clk_get_parent(struct clk *clk) } EXPORT_SYMBOL_GPL(clk_get_parent); -/* - * .get_parent is mandatory for clocks with multiple possible parents. It is - * optional for single-parent clocks. Always call .get_parent if it is - * available and WARN if it is missing for multi-parent clocks. - * - * For single-parent clocks without .get_parent, first check to see if the - * .parents array exists, and if so use it to avoid an expensive tree - * traversal. If .parents does not exist then walk the tree. - */ static struct clk_core *__clk_init_parent(struct clk_core *core) { - struct clk_core *ret = NULL; - u8 index; - - /* handle the trivial cases */ + u8 index = 0; - if (!core->num_parents) - goto out; - - if (core->num_parents == 1) { - if (IS_ERR_OR_NULL(core->parent)) - core->parent = clk_core_lookup(core->parent_names[0]); - ret = core->parent; - goto out; - } + if (core->ops->get_parent) + index = core->ops->get_parent(core->hw); - /* - * Do our best to cache parent clocks in core->parents. This prevents - * unnecessary and expensive lookups. We don't set core->parent here; - * that is done by the calling function. - */ - - index = core->ops->get_parent(core->hw); - - ret = clk_core_get_parent_by_index(core, index); - -out: - return ret; + return clk_core_get_parent_by_index(core, index); } static void clk_core_reparent(struct clk_core *core, -- 1.9.1