Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755338Ab3EMUBa (ORCPT ); Mon, 13 May 2013 16:01:30 -0400 Received: from mail-pa0-f42.google.com ([209.85.220.42]:41155 "EHLO mail-pa0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755119Ab3EMUB2 convert rfc822-to-8bit (ORCPT ); Mon, 13 May 2013 16:01:28 -0400 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT To: James Hogan , , From: Mike Turquette In-Reply-To: <1366388904-13903-2-git-send-email-james.hogan@imgtec.com> Cc: Stephen Boyd , James Hogan References: <1366388904-13903-1-git-send-email-james.hogan@imgtec.com> <1366388904-13903-2-git-send-email-james.hogan@imgtec.com> Message-ID: <20130513200123.10068.57183@quantum> User-Agent: alot/0.3.4 Subject: Re: [PATCH v2 1/3] clk: abstract parent cache Date: Mon, 13 May 2013 13:01:23 -0700 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3027 Lines: 78 Quoting James Hogan (2013-04-19 09:28:22) > Abstract access to the clock parent cache by defining > __clk_get_parent_by_index(clk, index). This allows access to parent > clocks from clock drivers. > > Signed-off-by: James Hogan > --- > drivers/clk/clk.c | 21 ++++++++++++++------- > include/linux/clk-provider.h | 1 + > 2 files changed, 15 insertions(+), 7 deletions(-) > > diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c > index ed87b24..79d5deb 100644 > --- a/drivers/clk/clk.c > +++ b/drivers/clk/clk.c > @@ -415,6 +415,19 @@ struct clk *__clk_get_parent(struct clk *clk) > return !clk ? NULL : clk->parent; > } > > +struct clk *__clk_get_parent_by_index(struct clk *clk, u8 index) This looks good, but in the next version can you remove the double underscore? I'm getting rid of a lot of those double underscore helpers now that the reentrancy patch is merged and I think this is a reasonable top-level API for a clock provider to have. Thanks, Mike > +{ > + if (!clk || index >= clk->num_parents) > + return NULL; > + else if (!clk->parents) > + return __clk_lookup(clk->parent_names[index]); > + else if (!clk->parents[index]) > + return clk->parents[index] = > + __clk_lookup(clk->parent_names[index]); > + else > + return clk->parents[index]; > +} > + > unsigned int __clk_get_enable_count(struct clk *clk) > { > return !clk ? 0 : clk->enable_count; > @@ -1150,13 +1163,7 @@ static struct clk *__clk_init_parent(struct clk *clk) > kzalloc((sizeof(struct clk*) * clk->num_parents), > GFP_KERNEL); > > - if (!clk->parents) > - ret = __clk_lookup(clk->parent_names[index]); > - else if (!clk->parents[index]) > - ret = clk->parents[index] = > - __clk_lookup(clk->parent_names[index]); > - else > - ret = clk->parents[index]; > + ret = __clk_get_parent_by_index(clk, index); > > out: > return ret; > diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h > index 7f197d7..4e0b634 100644 > --- a/include/linux/clk-provider.h > +++ b/include/linux/clk-provider.h > @@ -347,6 +347,7 @@ const char *__clk_get_name(struct clk *clk); > struct clk_hw *__clk_get_hw(struct clk *clk); > u8 __clk_get_num_parents(struct clk *clk); > struct clk *__clk_get_parent(struct clk *clk); > +struct clk *__clk_get_parent_by_index(struct clk *clk, u8 index); > unsigned int __clk_get_enable_count(struct clk *clk); > unsigned int __clk_get_prepare_count(struct clk *clk); > unsigned long __clk_get_rate(struct clk *clk); > -- > 1.8.1.2 -- 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/