device-tree-bindings/clock/st%2Cstm32mp1.txt

5 for RCC IP and on fixed clocks.
7 -------------------------------
8 RCC CLOCK = st,stm32mp1-rcc-clk
9 -------------------------------
15 Please refer to ../mfd/st,stm32-rcc.txt for all the other properties common
20 - compatible: Should be "st,stm32mp1-rcc-clk"
22 - st,clksrc : The clock source in this order
28 	dt-bindings/clock/stm32mp1-clksrc.h: CLK_<NAME>_<SOURCE>
30 - st,clkdiv : The div parameters in this order
51 - st,pll
56     - Sub-nodes:
58 	- cfg:	The parameters for PLL configuration in this order:
75 	- frac : Fractional part of the multiplication factor
76 		(optional, PLL is in integer mode when absent)
78 	- csg : Clock Spreading Generator (optional)
84 		* SSCG_MODE: Spread spectrum clock generator mode
85 		  you can use associated defines from stm32mp1-clksrc.h
90 - st,pkcs : used to configure the peripherals kernel clock selection
92   in the file dt-bindings/clock/stm32mp1-clksrc.h
97 		compatible = "syscon", "simple-mfd";
101 		rcc_clk: rcc-clk@50000000 {
102 			#clock-cells = <1>;
103 			compatible = "st,stm32mp1-rcc-clk";
154 --------------------------
155 other clocks = fixed-clock
156 --------------------------
157 The clock tree is also based on 5 fixed-clock in clocks node
159 - clk-lsi
160 - clk-lse
161 - clk-hsi
162 - clk-hse
163 - clk-csi
166 - enable the oscillator present in device tree
167 - disable HSI oscillator if the node is absent (always activated by bootrom)
171 a) for external oscillator: "clk-lse", "clk-hse"
174 	- "st,bypass" Configure the oscillator bypass mode (HSEBYP, LSEBYP)
175 	- "st,digbypass" Configure the bypass mode as full-swing digital signal
177 	- "st,css" Activate the clock security system (HSECSSON, LSECSSON)
178 	- "st,drive" (only for LSE) value of the drive for the oscillator
179 	   (see LSEDRV_ define in the file dt-bindings/clock/stm32mp1-clksrc.h)
185 			clk_hse: clk-hse {
186 				#clock-cells = <0>;
187 				compatible = "fixed-clock";
188 				clock-frequency = <64000000>;
192 			clk_lse: clk-lse {
193 				#clock-cells = <0>;
194 				compatible = "fixed-clock";
195 				clock-frequency = <32768>;
201 b) for internal oscillator: "clk-hsi"
203 	internally HSI clock is fixed to 64MHz for STM32MP157 soc
204 	in device tree clk-hsi is the clock after HSIDIV (ck_hsi in RCC doc)
212 			clk_hsi: clk-hsi {
213 				#clock-cells = <0>;
214 				compatible = "fixed-clock";
215 				clock-frequency = <64000000>;
223 			clk_hsi: clk-hsi {
224 				#clock-cells = <0>;
225 				compatible = "fixed-clock";
226 				clock-frequency = <32000000>;