Clock bindings for ST-Ericsson U300 System Controller Clocks
Bindings for the gated system controller clocks:
Required properties:
- compatible: must be “stericsson,u300-syscon-clk”
- #clock-cells: must be <0>
- clock-type: specifies the type of clock:
0 = slow clock
1 = fast clock
2 = rest/remaining clock - clock-id: specifies the clock in the type range
Optional properties:
- clocks: parent clock(s)
The available clocks per type are as follows:
Type: ID: Clock:
0 0 Slow peripheral bridge clock
0 1 UART0 clock
0 4 GPIO clock
0 6 RTC clock
0 7 Application timer clock
0 8 Access timer clock
1 0 Fast peripheral bridge clock
1 1 I2C bus 0 clock
1 2 I2C bus 1 clock
1 5 MMC interface peripheral (silicon) clock
1 6 SPI clock
2 3 CPU clock
2 4 DMA controller clock
2 5 External Memory Interface (EMIF) clock
2 6 NAND flask interface clock
2 8 XGAM graphics engine clock
2 9 Shared External Memory Interface (SEMI) clock
2 10 AHB Subsystem Bridge clock
2 12 Interrupt controller clock
Example:
gpio_clk: gpio_clk@13M {
#clock-cells = <0>;
compatible = “stericsson,u300-syscon-clk”;
clock-type = <0>; /* Slow */
clock-id = <4>;
clocks = <&slow_clk>;
};
gpio: gpio@c0016000 {
compatible = “stericsson,gpio-coh901”;
(…)
clocks = <&gpio_clk>;
};
Bindings for the MMC/SD card clock:
Required properties:
- compatible: must be “stericsson,u300-syscon-mclk”
- #clock-cells: must be <0>
Optional properties:
- clocks: parent clock(s)
mmc_mclk: mmc_mclk {
#clock-cells = <0>;
compatible = “stericsson,u300-syscon-mclk”;
clocks = <&mmc_pclk>;
};
mmcsd: mmcsd@c0001000 {
compatible = “arm,pl18x”, “arm,primecell”;
clocks = <&mmc_pclk>, <&mmc_mclk>;
clock-names = “apb_pclk”, “mclk”;
(…)
};
