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- Alphascale Clock Controller
- The ACC (Alphascale Clock Controller) is responsible of choising proper
- clock source, setting deviders and clock gates.
- Required properties for the ACC node:
- - compatible: must be "alphascale,asm9260-clock-controller"
- - reg: must contain the ACC register base and size
- - #clock-cells : shall be set to 1.
- Simple one-cell clock specifier format is used, where the only cell is used
- as an index of the clock inside the provider.
- It is encouraged to use dt-binding for clock index definitions. SoC specific
- dt-binding should be included to the device tree descriptor. For example
- Alphascale ASM9260:
- #include <dt-bindings/clock/alphascale,asm9260.h>
- This binding contains two types of clock providers:
- _AHB_ - AHB gate;
- _SYS_ - adjustable clock source. Not all peripheral have _SYS_ clock provider.
- All clock specific details can be found in the SoC documentation.
- CLKID_AHB_ROM 0
- CLKID_AHB_RAM 1
- CLKID_AHB_GPIO 2
- CLKID_AHB_MAC 3
- CLKID_AHB_EMI 4
- CLKID_AHB_USB0 5
- CLKID_AHB_USB1 6
- CLKID_AHB_DMA0 7
- CLKID_AHB_DMA1 8
- CLKID_AHB_UART0 9
- CLKID_AHB_UART1 10
- CLKID_AHB_UART2 11
- CLKID_AHB_UART3 12
- CLKID_AHB_UART4 13
- CLKID_AHB_UART5 14
- CLKID_AHB_UART6 15
- CLKID_AHB_UART7 16
- CLKID_AHB_UART8 17
- CLKID_AHB_UART9 18
- CLKID_AHB_I2S0 19
- CLKID_AHB_I2C0 20
- CLKID_AHB_I2C1 21
- CLKID_AHB_SSP0 22
- CLKID_AHB_IOCONFIG 23
- CLKID_AHB_WDT 24
- CLKID_AHB_CAN0 25
- CLKID_AHB_CAN1 26
- CLKID_AHB_MPWM 27
- CLKID_AHB_SPI0 28
- CLKID_AHB_SPI1 29
- CLKID_AHB_QEI 30
- CLKID_AHB_QUADSPI0 31
- CLKID_AHB_CAMIF 32
- CLKID_AHB_LCDIF 33
- CLKID_AHB_TIMER0 34
- CLKID_AHB_TIMER1 35
- CLKID_AHB_TIMER2 36
- CLKID_AHB_TIMER3 37
- CLKID_AHB_IRQ 38
- CLKID_AHB_RTC 39
- CLKID_AHB_NAND 40
- CLKID_AHB_ADC0 41
- CLKID_AHB_LED 42
- CLKID_AHB_DAC0 43
- CLKID_AHB_LCD 44
- CLKID_AHB_I2S1 45
- CLKID_AHB_MAC1 46
- CLKID_SYS_CPU 47
- CLKID_SYS_AHB 48
- CLKID_SYS_I2S0M 49
- CLKID_SYS_I2S0S 50
- CLKID_SYS_I2S1M 51
- CLKID_SYS_I2S1S 52
- CLKID_SYS_UART0 53
- CLKID_SYS_UART1 54
- CLKID_SYS_UART2 55
- CLKID_SYS_UART3 56
- CLKID_SYS_UART4 56
- CLKID_SYS_UART5 57
- CLKID_SYS_UART6 58
- CLKID_SYS_UART7 59
- CLKID_SYS_UART8 60
- CLKID_SYS_UART9 61
- CLKID_SYS_SPI0 62
- CLKID_SYS_SPI1 63
- CLKID_SYS_QUADSPI 64
- CLKID_SYS_SSP0 65
- CLKID_SYS_NAND 66
- CLKID_SYS_TRACE 67
- CLKID_SYS_CAMM 68
- CLKID_SYS_WDT 69
- CLKID_SYS_CLKOUT 70
- CLKID_SYS_MAC 71
- CLKID_SYS_LCD 72
- CLKID_SYS_ADCANA 73
- Example of clock consumer with _SYS_ and _AHB_ sinks.
- uart4: serial@80010000 {
- compatible = "alphascale,asm9260-uart";
- reg = <0x80010000 0x4000>;
- clocks = <&acc CLKID_SYS_UART4>, <&acc CLKID_AHB_UART4>;
- interrupts = <19>;
- status = "disabled";
- };
- Clock consumer with only one, _AHB_ sink.
- timer0: timer@80088000 {
- compatible = "alphascale,asm9260-timer";
- reg = <0x80088000 0x4000>;
- clocks = <&acc CLKID_AHB_TIMER0>;
- interrupts = <29>;
- };
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