mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
7f2ce16801
Document the device tree binding for Broadcom BCM28164 clock control units and clocks. This SoC uses Kona CCUs, similar to the BCM281XX SoC family. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
140 lines
5.6 KiB
Plaintext
140 lines
5.6 KiB
Plaintext
Broadcom Kona Family Clocks
|
|
|
|
This binding is associated with Broadcom SoCs having "Kona" style
|
|
clock control units (CCUs). A CCU is a clock provider that manages
|
|
a set of clock signals. Each CCU is represented by a node in the
|
|
device tree.
|
|
|
|
This binding uses the common clock binding:
|
|
Documentation/devicetree/bindings/clock/clock-bindings.txt
|
|
|
|
Required properties:
|
|
- compatible
|
|
Shall have a value of the form "brcm,<model>-<which>-ccu",
|
|
where <model> is a Broadcom SoC model number and <which> is
|
|
the name of a defined CCU. For example:
|
|
"brcm,bcm11351-root-ccu"
|
|
The compatible strings used for each supported SoC family
|
|
are defined below.
|
|
- 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 defined below.
|
|
- clock-output-names
|
|
Shall be an ordered list of strings defining the names of
|
|
the clocks provided by the CCU.
|
|
|
|
Device tree example:
|
|
|
|
slave_ccu: slave_ccu {
|
|
compatible = "brcm,bcm11351-slave-ccu";
|
|
reg = <0x3e011000 0x0f00>;
|
|
#clock-cells = <1>;
|
|
clock-output-names = "uartb",
|
|
"uartb2",
|
|
"uartb3",
|
|
"uartb4";
|
|
};
|
|
|
|
ref_crystal_clk: ref_crystal {
|
|
#clock-cells = <0>;
|
|
compatible = "fixed-clock";
|
|
clock-frequency = <26000000>;
|
|
};
|
|
|
|
uart@3e002000 {
|
|
compatible = "brcm,bcm11351-dw-apb-uart", "snps,dw-apb-uart";
|
|
status = "disabled";
|
|
reg = <0x3e002000 0x1000>;
|
|
clocks = <&slave_ccu BCM281XX_SLAVE_CCU_UARTB3>;
|
|
interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
|
|
reg-shift = <2>;
|
|
reg-io-width = <4>;
|
|
};
|
|
|
|
BCM281XX family
|
|
---------------
|
|
CCU compatible string values for SoCs in the BCM281XX family are:
|
|
"brcm,bcm11351-root-ccu"
|
|
"brcm,bcm11351-aon-ccu"
|
|
"brcm,bcm11351-hub-ccu"
|
|
"brcm,bcm11351-master-ccu"
|
|
"brcm,bcm11351-slave-ccu"
|
|
|
|
The following table defines the set of CCUs and clock specifiers for
|
|
BCM281XX family clocks. When a clock consumer references a clocks,
|
|
its symbolic specifier (rather than its numeric index value) should
|
|
be used. These specifiers are defined in:
|
|
"include/dt-bindings/clock/bcm281xx.h"
|
|
|
|
CCU Clock Type Index Specifier
|
|
--- ----- ---- ----- ---------
|
|
root frac_1m peri 0 BCM281XX_ROOT_CCU_FRAC_1M
|
|
|
|
aon hub_timer peri 0 BCM281XX_AON_CCU_HUB_TIMER
|
|
aon pmu_bsc peri 1 BCM281XX_AON_CCU_PMU_BSC
|
|
aon pmu_bsc_var peri 2 BCM281XX_AON_CCU_PMU_BSC_VAR
|
|
|
|
hub tmon_1m peri 0 BCM281XX_HUB_CCU_TMON_1M
|
|
|
|
master sdio1 peri 0 BCM281XX_MASTER_CCU_SDIO1
|
|
master sdio2 peri 1 BCM281XX_MASTER_CCU_SDIO2
|
|
master sdio3 peri 2 BCM281XX_MASTER_CCU_SDIO3
|
|
master sdio4 peri 3 BCM281XX_MASTER_CCU_SDIO4
|
|
master dmac peri 4 BCM281XX_MASTER_CCU_DMAC
|
|
master usb_ic peri 5 BCM281XX_MASTER_CCU_USB_IC
|
|
master hsic2_48m peri 6 BCM281XX_MASTER_CCU_HSIC_48M
|
|
master hsic2_12m peri 7 BCM281XX_MASTER_CCU_HSIC_12M
|
|
|
|
slave uartb peri 0 BCM281XX_SLAVE_CCU_UARTB
|
|
slave uartb2 peri 1 BCM281XX_SLAVE_CCU_UARTB2
|
|
slave uartb3 peri 2 BCM281XX_SLAVE_CCU_UARTB3
|
|
slave uartb4 peri 3 BCM281XX_SLAVE_CCU_UARTB4
|
|
slave ssp0 peri 4 BCM281XX_SLAVE_CCU_SSP0
|
|
slave ssp2 peri 5 BCM281XX_SLAVE_CCU_SSP2
|
|
slave bsc1 peri 6 BCM281XX_SLAVE_CCU_BSC1
|
|
slave bsc2 peri 7 BCM281XX_SLAVE_CCU_BSC2
|
|
slave bsc3 peri 8 BCM281XX_SLAVE_CCU_BSC3
|
|
slave pwm peri 9 BCM281XX_SLAVE_CCU_PWM
|
|
|
|
|
|
BCM21664 family
|
|
---------------
|
|
CCU compatible string values for SoCs in the BCM21664 family are:
|
|
"brcm,bcm21664-root-ccu"
|
|
"brcm,bcm21664-aon-ccu"
|
|
"brcm,bcm21664-master-ccu"
|
|
"brcm,bcm21664-slave-ccu"
|
|
|
|
The following table defines the set of CCUs and clock specifiers for
|
|
BCM21664 family clocks. When a clock consumer references a clocks,
|
|
its symbolic specifier (rather than its numeric index value) should
|
|
be used. These specifiers are defined in:
|
|
"include/dt-bindings/clock/bcm21664.h"
|
|
|
|
CCU Clock Type Index Specifier
|
|
--- ----- ---- ----- ---------
|
|
root frac_1m peri 0 BCM21664_ROOT_CCU_FRAC_1M
|
|
|
|
aon hub_timer peri 0 BCM21664_AON_CCU_HUB_TIMER
|
|
|
|
master sdio1 peri 0 BCM21664_MASTER_CCU_SDIO1
|
|
master sdio2 peri 1 BCM21664_MASTER_CCU_SDIO2
|
|
master sdio3 peri 2 BCM21664_MASTER_CCU_SDIO3
|
|
master sdio4 peri 3 BCM21664_MASTER_CCU_SDIO4
|
|
master sdio1_sleep peri 4 BCM21664_MASTER_CCU_SDIO1_SLEEP
|
|
master sdio2_sleep peri 5 BCM21664_MASTER_CCU_SDIO2_SLEEP
|
|
master sdio3_sleep peri 6 BCM21664_MASTER_CCU_SDIO3_SLEEP
|
|
master sdio4_sleep peri 7 BCM21664_MASTER_CCU_SDIO4_SLEEP
|
|
|
|
slave uartb peri 0 BCM21664_SLAVE_CCU_UARTB
|
|
slave uartb2 peri 1 BCM21664_SLAVE_CCU_UARTB2
|
|
slave uartb3 peri 2 BCM21664_SLAVE_CCU_UARTB3
|
|
slave uartb4 peri 3 BCM21664_SLAVE_CCU_UARTB4
|
|
slave bsc1 peri 4 BCM21664_SLAVE_CCU_BSC1
|
|
slave bsc2 peri 5 BCM21664_SLAVE_CCU_BSC2
|
|
slave bsc3 peri 6 BCM21664_SLAVE_CCU_BSC3
|
|
slave bsc4 peri 7 BCM21664_SLAVE_CCU_BSC4
|