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[90.63.244.31]) by smtp.gmail.com with ESMTPSA id o126sm6802520wmo.1.2019.06.20.08.00.21 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 20 Jun 2019 08:00:21 -0700 (PDT) From: Neil Armstrong To: jbrunet@baylibre.com, khilman@baylibre.com Cc: linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, martin.blumenstingl@googlemail.com, Neil Armstrong Subject: [RFC/RFT 02/14] clk: core: introduce clk_hw_set_parent() Date: Thu, 20 Jun 2019 17:00:01 +0200 Message-Id: <20190620150013.13462-3-narmstrong@baylibre.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190620150013.13462-1-narmstrong@baylibre.com> References: <20190620150013.13462-1-narmstrong@baylibre.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce the clk_hw_set_parent() provider call to change parent of a clock by using the clk_hw pointers. This eases the clock reparenting from clock rate notifiers and implementing DVFS with simpler code avoiding the boilerplates functions as __clk_lookup(clk_hw_get_name()) then clk_set_parent(). Signed-off-by: Neil Armstrong --- drivers/clk/clk.c | 5 +++++ include/linux/clk-provider.h | 1 + 2 files changed, 6 insertions(+) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index aa51756fd4d6..3e98f7dec626 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -2490,6 +2490,11 @@ static int clk_core_set_parent_nolock(struct clk_core *core, return ret; } +int clk_hw_set_parent(struct clk_hw *hw, struct clk_hw *parent) +{ + return clk_core_set_parent_nolock(hw->core, parent->core); +} + /** * clk_set_parent - switch the parent of a mux clk * @clk: the mux clk whose input we are switching diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index bb6118f79784..8a453380f9a4 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -812,6 +812,7 @@ unsigned int clk_hw_get_num_parents(const struct clk_hw *hw); struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw); struct clk_hw *clk_hw_get_parent_by_index(const struct clk_hw *hw, unsigned int index); +int clk_hw_set_parent(struct clk_hw *hw, struct clk_hw *new_parent); unsigned int __clk_get_enable_count(struct clk *clk); unsigned long clk_hw_get_rate(const struct clk_hw *hw); unsigned long __clk_get_flags(struct clk *clk); -- 2.21.0