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-* NXP LPC1850 Clock Generation Unit (CGU)
-
-The CGU generates multiple independent clocks for the core and the
-peripheral blocks of the LPC18xx. Each independent clock is called
-a base clock and itself is one of the inputs to the two Clock
-Control Units (CCUs) which control the branch clocks to the
-individual peripherals.
-
-The CGU selects the inputs to the clock generators from multiple
-clock sources, controls the clock generation, and routes the outputs
-of the clock generators through the clock source bus to the output
-stages. Each output stage provides an independent clock source and
-corresponds to one of the base clocks for the LPC18xx.
-
- - Above text taken from NXP LPC1850 User Manual.
-
-
-This binding uses the common clock binding:
- Documentation/devicetree/bindings/clock/clock-bindings.txt
-
-Required properties:
-- compatible:
- Should be "nxp,lpc1850-cgu"
-- reg:
- Shall define the base and range of the address space
- containing clock control registers
-- #clock-cells:
- Shall have value <1>. The permitted clock-specifier values
- are the base clock numbers defined below.
-- clocks:
- Shall contain a list of phandles for the external input
- sources to the CGU. The list shall be in the following
- order: xtal, 32khz, enet_rx_clk, enet_tx_clk, gp_clkin.
-- clock-indices:
- Shall be an ordered list of numbers defining the base clock
- number provided by the CGU.
-- clock-output-names:
- Shall be an ordered list of strings defining the names of
- the clocks provided by the CGU.
-
-Which base clocks that are available on the CGU depends on the
-specific LPC part. Base clocks are numbered from 0 to 27.
-
-Number: Name: Description:
- 0 BASE_SAFE_CLK Base safe clock (always on) for WWDT
- 1 BASE_USB0_CLK Base clock for USB0
- 2 BASE_PERIPH_CLK Base clock for Cortex-M0SUB subsystem,
- SPI, and SGPIO
- 3 BASE_USB1_CLK Base clock for USB1
- 4 BASE_CPU_CLK System base clock for ARM Cortex-M core
- and APB peripheral blocks #0 and #2
- 5 BASE_SPIFI_CLK Base clock for SPIFI
- 6 BASE_SPI_CLK Base clock for SPI
- 7 BASE_PHY_RX_CLK Base clock for Ethernet PHY Receive clock
- 8 BASE_PHY_TX_CLK Base clock for Ethernet PHY Transmit clock
- 9 BASE_APB1_CLK Base clock for APB peripheral block # 1
-10 BASE_APB3_CLK Base clock for APB peripheral block # 3
-11 BASE_LCD_CLK Base clock for LCD
-12 BASE_ADCHS_CLK Base clock for ADCHS
-13 BASE_SDIO_CLK Base clock for SD/MMC
-14 BASE_SSP0_CLK Base clock for SSP0
-15 BASE_SSP1_CLK Base clock for SSP1
-16 BASE_UART0_CLK Base clock for UART0
-17 BASE_UART1_CLK Base clock for UART1
-18 BASE_UART2_CLK Base clock for UART2
-19 BASE_UART3_CLK Base clock for UART3
-20 BASE_OUT_CLK Base clock for CLKOUT pin
-24-21 - Reserved
-25 BASE_AUDIO_CLK Base clock for audio system (I2S)
-26 BASE_CGU_OUT0_CLK Base clock for CGU_OUT0 clock output
-27 BASE_CGU_OUT1_CLK Base clock for CGU_OUT1 clock output
-
-BASE_PERIPH_CLK and BASE_SPI_CLK is only available on LPC43xx.
-BASE_ADCHS_CLK is only available on LPC4370.
-
-
-Example board file:
-
-/ {
- clocks {
- xtal: xtal {
- compatible = "fixed-clock";
- #clock-cells = <0>;
- clock-frequency = <12000000>;
- };
-
- xtal32: xtal32 {
- compatible = "fixed-clock";
- #clock-cells = <0>;
- clock-frequency = <32768>;
- };
-
- enet_rx_clk: enet_rx_clk {
- compatible = "fixed-clock";
- #clock-cells = <0>;
- clock-frequency = <0>;
- clock-output-names = "enet_rx_clk";
- };
-
- enet_tx_clk: enet_tx_clk {
- compatible = "fixed-clock";
- #clock-cells = <0>;
- clock-frequency = <0>;
- clock-output-names = "enet_tx_clk";
- };
-
- gp_clkin: gp_clkin {
- compatible = "fixed-clock";
- #clock-cells = <0>;
- clock-frequency = <0>;
- clock-output-names = "gp_clkin";
- };
- };
-
- soc {
- cgu: clock-controller@40050000 {
- compatible = "nxp,lpc1850-cgu";
- reg = <0x40050000 0x1000>;
- #clock-cells = <1>;
- clocks = <&xtal>, <&creg_clk 1>, <&enet_rx_clk>, <&enet_tx_clk>, <&gp_clkin>;
- };
-
- /* A CGU and CCU clock consumer */
- lcdc: lcdc@40008000 {
- ...
- clocks = <&cgu BASE_LCD_CLK>, <&ccu1 CLK_CPU_LCD>;
- clock-names = "clcdclk", "apb_pclk";
- ...
- };
- };
-};