From mboxrd@z Thu Jan 1 00:00:00 1970 From: Francesco VIRLINZI Date: Wed, 11 Mar 2009 07:40:54 +0000 Subject: [PATCH] sh_clk: added clk_set_parent/clk_get_parent v2 Message-Id: <49B76B06.50602@st.com> MIME-Version: 1 Content-Type: multipart/mixed; boundary="------------050600020602060606080704" List-Id: References: <49B66867.2010406@st.com> In-Reply-To: <49B66867.2010406@st.com> To: linux-sh@vger.kernel.org This is a multi-part message in MIME format. --------------050600020602060606080704 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit --------------050600020602060606080704 Content-Type: text/x-patch; name="0002-sh_clk-Add-clk_set_parent-clk_get_parent-support.patch" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename*0="0002-sh_clk-Add-clk_set_parent-clk_get_parent-support.patch" >From 96d7aa00af83ecb4a3660ace507221b959aa12f1 Mon Sep 17 00:00:00 2001 From: Francesco Virlinzi Date: Wed, 11 Mar 2009 08:09:16 +0100 Subject: [PATCH] sh_clk: Add clk_set_parent/clk_get_parent support This patch adds the clk_set_parent/clk_get_parent in the sh clock framework Signed-off-by: Francesco Virlinzi --- arch/sh/include/asm/clock.h | 1 + arch/sh/kernel/cpu/clock.c | 29 +++++++++++++++++++++++++++++ 2 files changed, 30 insertions(+), 0 deletions(-) diff --git a/arch/sh/include/asm/clock.h b/arch/sh/include/asm/clock.h index f9c8858..2f6c962 100644 --- a/arch/sh/include/asm/clock.h +++ b/arch/sh/include/asm/clock.h @@ -15,6 +15,7 @@ struct clk_ops { void (*disable)(struct clk *clk); void (*recalc)(struct clk *clk); int (*set_rate)(struct clk *clk, unsigned long rate, int algo_id); + int (*set_parent)(struct clk *clk, struct clk *parent); long (*round_rate)(struct clk *clk, unsigned long rate); }; diff --git a/arch/sh/kernel/cpu/clock.c b/arch/sh/kernel/cpu/clock.c index 7b17137..332a179 100644 --- a/arch/sh/kernel/cpu/clock.c +++ b/arch/sh/kernel/cpu/clock.c @@ -239,6 +239,35 @@ void clk_recalc_rate(struct clk *clk) } EXPORT_SYMBOL_GPL(clk_recalc_rate); +int clk_set_parent(struct clk *clk, struct clk *parent) +{ + int ret = -EINVAL; + struct clk *old; + + if (!parent || !clk) + return ret; + + old = clk->parent; + if (likely(clk->ops && clk->ops->set_parent)) { + unsigned long flags; + spin_lock_irqsave(&clock_lock, flags); + ret = clk->ops->set_parent(clk, parent); + spin_unlock_irqrestore(&clock_lock, flags); + clk->parent = (ret ? old : parent); + } + + if (unlikely(clk->flags & CLK_RATE_PROPAGATES)) + propagate_rate(clk); + return ret; +} +EXPORT_SYMBOL_GPL(clk_set_parent); + +struct clk *clk_get_parent(struct clk *clk) +{ + return clk->parent; +} +EXPORT_SYMBOL_GPL(clk_get_parent); + long clk_round_rate(struct clk *clk, unsigned long rate) { if (likely(clk->ops && clk->ops->round_rate)) { -- 1.5.6.6 --------------050600020602060606080704--