From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gabriel Fernandez Subject: [RESEND PATCH v2 04/13] drivers: clk: st: Add clock propagation for audio clocks Date: Thu, 16 Jun 2016 11:20:24 +0200 Message-ID: <1466068833-5055-5-git-send-email-gabriel.fernandez@linaro.org> References: <1466068833-5055-1-git-send-email-gabriel.fernandez@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1466068833-5055-1-git-send-email-gabriel.fernandez@linaro.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Rob Herring , Mark Rutland , Ian Campbell , Kumar Gala , Srinivas Kandagatla , Maxime Coquelin , Patrice Chotard , Russell King , Michael Turquette , Stephen Boyd , Olivier Bideau , Gabriel Fernandez , Geert Uytterhoeven , Sebastian Hesselbarth , Andrzej Hajda , Pankaj Dev , Dinh Nguyen , Arnd Bergmann , Thierry Reding Cc: devicetree@vger.kernel.org, kernel@stlinux.com, vincent.abriou@st.com, arnaud.pouliquen@st.com, linux-kernel@vger.kernel.org, gabriel.fernandez@st.com, Peter Griffin , Lee Jones , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, benjamin.gaignard@st.com List-Id: devicetree@vger.kernel.org This patch allows fine tuning of the quads FS for audio clocks accuracy. Signed-off-by: Olivier Bideau Signed-off-by: Gabriel Fernandez --- .../devicetree/bindings/clock/st/st,flexgen.txt | 2 ++ drivers/clk/st/clk-flexgen.c | 24 ++++++++++++++++++++++ 2 files changed, 26 insertions(+) diff --git a/Documentation/devicetree/bindings/clock/st/st,flexgen.txt b/Documentation/devicetree/bindings/clock/st/st,flexgen.txt index b7ee5c7..d68f6a5f 100644 --- a/Documentation/devicetree/bindings/clock/st/st,flexgen.txt +++ b/Documentation/devicetree/bindings/clock/st/st,flexgen.txt @@ -60,6 +60,8 @@ This binding uses the common clock binding[2]. Required properties: - compatible : shall be: "st,flexgen" + "st,flexgen-audio", "st,flexgen" (enable clock propagation on parent for + audio use case) - #clock-cells : from common clock binding; shall be set to 1 (multiple clock outputs). diff --git a/drivers/clk/st/clk-flexgen.c b/drivers/clk/st/clk-flexgen.c index 627267c..33d6ced 100644 --- a/drivers/clk/st/clk-flexgen.c +++ b/drivers/clk/st/clk-flexgen.c @@ -15,6 +15,10 @@ #include #include +struct clkgen_data { + unsigned long flags; +}; + struct flexgen { struct clk_hw hw; @@ -259,6 +263,18 @@ static const char ** __init flexgen_get_parents(struct device_node *np, return parents; } +static const struct clkgen_data clkgen_audio = { + .flags = CLK_SET_RATE_PARENT, +}; + +static const struct of_device_id flexgen_of_match[] = { + { + .compatible = "st,flexgen-audio", + .data = &clkgen_audio, + }, + {} +}; + static void __init st_of_flexgen_setup(struct device_node *np) { struct device_node *pnode; @@ -267,6 +283,8 @@ static void __init st_of_flexgen_setup(struct device_node *np) const char **parents; int num_parents, i; spinlock_t *rlock = NULL; + const struct of_device_id *match; + struct clkgen_data *data = NULL; unsigned long flex_flags = 0; int ret; @@ -282,6 +300,12 @@ static void __init st_of_flexgen_setup(struct device_node *np) if (!parents) return; + match = of_match_node(flexgen_of_match, np); + if (match) { + data = (struct clkgen_data *)match->data; + flex_flags = data->flags; + } + clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL); if (!clk_data) goto err; -- 1.9.1