From: <gabriel.fernandez@st.com>
To: Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Russell King <linux@armlinux.org.uk>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>,
Nicolas Pitre <nico@linaro.org>, Arnd Bergmann <arnd@arndb.de>,
<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>
Subject: [PATCH v4 1/9] clk: stm32f4: Update DT bindings documentation
Date: Tue, 13 Dec 2016 15:20:12 +0100 [thread overview]
Message-ID: <1481638820-29324-2-git-send-email-gabriel.fernandez@st.com> (raw)
In-Reply-To: <1481638820-29324-1-git-send-email-gabriel.fernandez@st.com>
From: Gabriel Fernandez <gabriel.fernandez@st.com>
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 <gabriel.fernandez@st.com>
Acked-by: Rob Herring <robh@kernel.org>
---
.../devicetree/bindings/clock/st,stm32-rcc.txt | 17 ++++++++++
include/dt-bindings/clock/stm32fx-clock.h | 39 ++++++++++++++++++++++
2 files changed, 56 insertions(+)
create mode 100644 include/dt-bindings/clock/stm32fx-clock.h
diff --git a/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt b/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt
index 0532d81..8f19d87 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 +70,19 @@ 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
+ 12 CLK_I2SQ_PDIV (post divisor of pll i2s q divisor)
+ 13 CLK_SAIQ_PDIV (post divisor of pll sai q divisor)
Example:
diff --git a/include/dt-bindings/clock/stm32fx-clock.h b/include/dt-bindings/clock/stm32fx-clock.h
new file mode 100644
index 0000000..08bcab6
--- /dev/null
+++ b/include/dt-bindings/clock/stm32fx-clock.h
@@ -0,0 +1,39 @@
+/*
+ * stm32fx-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:
+ <assigned-clocks = <&rcc 1 CLK_LSE>;
+*/
+
+#ifndef _DT_BINDINGS_CLK_STMFX_H
+#define _DT_BINDINGS_CLK_STMFX_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 CLK_I2SQ_PDIV 12
+#define CLK_SAIQ_PDIV 13
+
+#define END_PRIMARY_CLK 14
+
+#endif
--
1.9.1
next prev parent reply other threads:[~2016-12-13 14:22 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-13 14:20 [PATCH v4 0/9] STM32F4 missing clocks gabriel.fernandez
2016-12-13 14:20 ` gabriel.fernandez [this message]
2016-12-22 0:10 ` [PATCH v4 1/9] clk: stm32f4: Update DT bindings documentation Stephen Boyd
2017-01-09 16:28 ` Alexandre Torgue
2017-01-09 19:33 ` Stephen Boyd
2017-01-10 10:08 ` Alexandre Torgue
2016-12-13 14:20 ` [PATCH v4 2/9] clk: stm32f4: Add PLL_I2S & PLL_SAI for STM32F429/469 boards gabriel.fernandez
2016-12-22 0:10 ` Stephen Boyd
2016-12-13 14:20 ` [PATCH v4 3/9] clk: stm32f4: Add post divisor for I2S & SAI PLLs gabriel.fernandez
2016-12-22 0:11 ` Stephen Boyd
2016-12-13 14:20 ` [PATCH v4 4/9] clk: stm32f4: Add lcd-tft clock gabriel.fernandez
2016-12-22 0:11 ` Stephen Boyd
2016-12-13 14:20 ` [PATCH v4 5/9] clk: stm32f4: Add I2S clock gabriel.fernandez
2016-12-22 0:11 ` Stephen Boyd
2016-12-13 14:20 ` [PATCH v4 6/9] clk: stm32f4: Add SAI clocks gabriel.fernandez
2016-12-22 0:11 ` Stephen Boyd
2016-12-13 14:20 ` [PATCH v4 7/9] clk: stm32f4: SDIO & 48Mhz clock management for STM32F469 board gabriel.fernandez
2016-12-22 0:11 ` Stephen Boyd
2016-12-13 14:20 ` [PATCH v4 8/9] ARM: dts: stm32f4: Add external I2S clock gabriel.fernandez
2017-01-10 10:59 ` Alexandre Torgue
2016-12-13 14:20 ` [PATCH v4 9/9] ARM: dts: stm32f4: Include auxiliary stm32fx clock definition gabriel.fernandez
2017-01-10 10:59 ` Alexandre Torgue
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