[v4,1/9] clk: stm32f4: Update DT bindings documentation
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Message ID 1481638820-29324-2-git-send-email-gabriel.fernandez@st.com
State Not Applicable, archived
Headers show

Commit Message

Gabriel Fernandez Dec. 13, 2016, 2:20 p.m. UTC
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

Comments

Stephen Boyd Dec. 22, 2016, 12:10 a.m. UTC | #1
On 12/13, gabriel.fernandez@st.com wrote:
> 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>
> ---

Applied to clk-stm32f4 and merged into clk-next.
Alexandre Torgue Jan. 9, 2017, 4:28 p.m. UTC | #2
Hi Stephen,

On 12/22/2016 01:10 AM, Stephen Boyd wrote:
> On 12/13, gabriel.fernandez@st.com wrote:
>> 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>
>> ---
>
> Applied to clk-stm32f4 and merged into clk-next.
>

I'm preparing pull request branch for STM32 DT part. This patch is also 
requested to build correctly DT patches. Do you know how could we 
synchronize our pull request ?

Thanks
Alex
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Stephen Boyd Jan. 9, 2017, 7:33 p.m. UTC | #3
On 01/09, Alexandre Torgue wrote:
> Hi Stephen,
> 
> On 12/22/2016 01:10 AM, Stephen Boyd wrote:
> >On 12/13, gabriel.fernandez@st.com wrote:
> >>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>
> >>---
> >
> >Applied to clk-stm32f4 and merged into clk-next.
> >
> 
> I'm preparing pull request branch for STM32 DT part. This patch is
> also requested to build correctly DT patches. Do you know how could
> we synchronize our pull request ?
> 

clk-stm32f4 is stable and not going to be rebased, so you're good
to base patches on it and send it off to arm-soc if the arm-soc
maintainers agree to it. You can also base off an earlier part of
the branch if you only need this first patch for example.
Alexandre Torgue Jan. 10, 2017, 10:08 a.m. UTC | #4
On 01/09/2017 08:33 PM, Stephen Boyd wrote:
> On 01/09, Alexandre Torgue wrote:
>> Hi Stephen,
>>
>> On 12/22/2016 01:10 AM, Stephen Boyd wrote:
>>> On 12/13, gabriel.fernandez@st.com wrote:
>>>> 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>
>>>> ---
>>>
>>> Applied to clk-stm32f4 and merged into clk-next.
>>>
>>
>> I'm preparing pull request branch for STM32 DT part. This patch is
>> also requested to build correctly DT patches. Do you know how could
>> we synchronize our pull request ?
>>
>
> clk-stm32f4 is stable and not going to be rebased, so you're good
> to base patches on it and send it off to arm-soc if the arm-soc
> maintainers agree to it. You can also base off an earlier part of
> the branch if you only need this first patch for example.
>
I will base my DT branch from 4.10-rc1 + this commit (seen with Arnd)

Thanks

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Patch
diff mbox

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