From mboxrd@z Thu Jan 1 00:00:00 1970 From: Subject: [PATCH v3 1/9] clk: stm32f4: Update DT bindings documentation Date: Thu, 1 Dec 2016 16:27:41 +0100 Message-ID: <1480606069-5178-2-git-send-email-gabriel.fernandez@st.com> References: <1480606069-5178-1-git-send-email-gabriel.fernandez@st.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1480606069-5178-1-git-send-email-gabriel.fernandez@st.com> Sender: linux-clk-owner@vger.kernel.org To: Rob Herring , Mark Rutland , Russell King , Maxime Coquelin , Alexandre Torgue , Michael Turquette , Stephen Boyd , Nicolas Pitre , Arnd Bergmann , daniel.thompson@linaro.org, andrea.merello@gmail.com, radoslaw.pietrzyk@gmail.com Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, kernel@stlinux.com, gabriel.fernandez@st.com, ludovic.barre@st.com, olivier.bideau@st.com, amelie.delaunay@st.com List-Id: devicetree@vger.kernel.org From: Gabriel Fernandez Creation of dt include file for specific stm32f4 clocks. These specific clocks are not derived from system clock (SYSCLOCK) We should use index 1 to use these clocks in DT. e.g. <&rcc 1 CLK_LSI> Signed-off-by: Gabriel Fernandez Acked-by: Rob Herring --- .../devicetree/bindings/clock/st,stm32-rcc.txt | 15 +++++++++ include/dt-bindings/clock/stm32f4-clock.h | 37 ++++++++++++++++++++++ 2 files changed, 52 insertions(+) create mode 100644 include/dt-bindings/clock/stm32f4-clock.h diff --git a/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt b/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt index 0532d81..8f93740 100644 --- a/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt +++ b/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt @@ -17,6 +17,9 @@ Required properties: property, containing a phandle to the clock device node, an index selecting between gated clocks and other clocks and an index specifying the clock to use. +- clocks: External oscillator clock phandle + - high speed external clock signal (HSE) + - external I2S clock (I2S_CKIN) Example: @@ -25,6 +28,7 @@ Example: #clock-cells = <2> compatible = "st,stm32f42xx-rcc", "st,stm32-rcc"; reg = <0x40023800 0x400>; + clocks = <&clk_hse>, <&clk_i2s_ckin>; }; Specifying gated clocks @@ -66,6 +70,17 @@ The secondary index is bound with the following magic numbers: 0 SYSTICK 1 FCLK + 2 CLK_LSI (low-power clock source) + 3 CLK_LSE (generated from a 32.768 kHz low-speed external + crystal or ceramic resonator) + 4 CLK_HSE_RTC (HSE division factor for RTC clock) + 5 CLK_RTC (real-time clock) + 6 PLL_VCO_I2S (vco frequency of I2S pll) + 7 PLL_VCO_SAI (vco frequency of SAI pll) + 8 CLK_LCD (LCD-TFT) + 9 CLK_I2S (I2S clocks) + 10 CLK_SAI1 (audio clocks) + 11 CLK_SAI2 Example: diff --git a/include/dt-bindings/clock/stm32f4-clock.h b/include/dt-bindings/clock/stm32f4-clock.h new file mode 100644 index 0000000..5431f00 --- /dev/null +++ b/include/dt-bindings/clock/stm32f4-clock.h @@ -0,0 +1,37 @@ +/* + * stm32f4-clock.h + * + * Copyright (C) 2016 STMicroelectronics + * Author: Gabriel Fernandez for STMicroelectronics. + * License terms: GNU General Public License (GPL), version 2 + */ + +/* + * List of clocks wich are not derived from system clock (SYSCLOCK) + * + * The index of these clocks is the secondary index of DT bindings + * (see Documentatoin/devicetree/bindings/clock/st,stm32-rcc.txt) + * + * e.g: + ; +*/ + +#ifndef _DT_BINDINGS_CLK_STMF4_H +#define _DT_BINDINGS_CLK_STMF4_H + +#define SYSTICK 0 +#define FCLK 1 +#define CLK_LSI 2 +#define CLK_LSE 3 +#define CLK_HSE_RTC 4 +#define CLK_RTC 5 +#define PLL_VCO_I2S 6 +#define PLL_VCO_SAI 7 +#define CLK_LCD 8 +#define CLK_I2S 9 +#define CLK_SAI1 10 +#define CLK_SAI2 11 + +#define END_PRIMARY_CLK 12 + +#endif -- 1.9.1