diff options
| author | Gabriel Fernandez <gabriel.fernandez@st.com> | 2016-12-13 15:20:00 +0100 |
|---|---|---|
| committer | Alexandre TORGUE <alexandre.torgue@st.com> | 2017-01-10 11:40:40 +0100 |
| commit | be20fe159d000ca6d8ce0b7b10f8787d879490ab (patch) | |
| tree | b98f9f0282b27e9a6285964c295c679a27f2a5e9 /Documentation/devicetree/bindings/clock | |
| parent | 7ce7d89f48834cefece7804d38fc5d85382edf77 (diff) | |
clk: stm32f4: Update DT bindings documentation
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>
Diffstat (limited to 'Documentation/devicetree/bindings/clock')
| -rw-r--r-- | Documentation/devicetree/bindings/clock/st,stm32-rcc.txt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt b/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt index 0532d815dae3..8f19d87cbf24 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: |