88f0f0b0be
The cyclecounter mult and shift values can be calculated based on the
CPTS rfclk frequency and timekeepnig framework provides required algos
and API's.
Hence, calc mult and shift basing on CPTS rfclk frequency if both
cpts_clock_shift and cpts_clock_mult properties are not provided in DT (the
basis of calculation algorithm is borrowed from
__clocksource_update_freq_scale() commit 7d2f944a2b ("clocksource:
Provide a generic mult/shift factor calculation")). After this change
cpts_clock_shift and cpts_clock_mult DT properties will become optional.
Cc: John Stultz <john.stultz@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
123 lines
3.9 KiB
Plaintext
123 lines
3.9 KiB
Plaintext
TI SoC Ethernet Switch Controller Device Tree Bindings
|
|
------------------------------------------------------
|
|
|
|
Required properties:
|
|
- compatible : Should be one of the below:-
|
|
"ti,cpsw" for backward compatible
|
|
"ti,am335x-cpsw" for AM335x controllers
|
|
"ti,am4372-cpsw" for AM437x controllers
|
|
"ti,dra7-cpsw" for DRA7x controllers
|
|
- reg : physical base address and size of the cpsw
|
|
registers map
|
|
- interrupts : property with a value describing the interrupt
|
|
number
|
|
- interrupt-parent : The parent interrupt controller
|
|
- cpdma_channels : Specifies number of channels in CPDMA
|
|
- ale_entries : Specifies No of entries ALE can hold
|
|
- bd_ram_size : Specifies internal descriptor RAM size
|
|
- mac_control : Specifies Default MAC control register content
|
|
for the specific platform
|
|
- slaves : Specifies number for slaves
|
|
- active_slave : Specifies the slave to use for time stamping,
|
|
ethtool and SIOCGMIIPHY
|
|
|
|
Optional properties:
|
|
- ti,hwmods : Must be "cpgmac0"
|
|
- no_bd_ram : Must be 0 or 1
|
|
- dual_emac : Specifies Switch to act as Dual EMAC
|
|
- syscon : Phandle to the system control device node, which is
|
|
the control module device of the am33x
|
|
- mode-gpios : Should be added if one/multiple gpio lines are
|
|
required to be driven so that cpsw data lines
|
|
can be connected to the phy via selective mux.
|
|
For example in dra72x-evm, pcf gpio has to be
|
|
driven low so that cpsw slave 0 and phy data
|
|
lines are connected via mux.
|
|
- cpts_clock_mult : Numerator to convert input clock ticks into nanoseconds
|
|
- cpts_clock_shift : Denominator to convert input clock ticks into nanoseconds
|
|
Mult and shift will be calculated basing on CPTS
|
|
rftclk frequency if both cpts_clock_shift and
|
|
cpts_clock_mult properties are not provided.
|
|
|
|
Slave Properties:
|
|
Required properties:
|
|
- phy-mode : See ethernet.txt file in the same directory
|
|
|
|
Optional properties:
|
|
- dual_emac_res_vlan : Specifies VID to be used to segregate the ports
|
|
- mac-address : See ethernet.txt file in the same directory
|
|
- phy_id : Specifies slave phy id (deprecated, use phy-handle)
|
|
- phy-handle : See ethernet.txt file in the same directory
|
|
|
|
Slave sub-nodes:
|
|
- fixed-link : See fixed-link.txt file in the same directory
|
|
|
|
Note: Exactly one of phy_id, phy-handle, or fixed-link must be specified.
|
|
|
|
Note: "ti,hwmods" field is used to fetch the base address and irq
|
|
resources from TI, omap hwmod data base during device registration.
|
|
Future plan is to migrate hwmod data base contents into device tree
|
|
blob so that, all the required data will be used from device tree dts
|
|
file.
|
|
|
|
Examples:
|
|
|
|
mac: ethernet@4A100000 {
|
|
compatible = "ti,cpsw";
|
|
reg = <0x4A100000 0x1000>;
|
|
interrupts = <55 0x4>;
|
|
interrupt-parent = <&intc>;
|
|
cpdma_channels = <8>;
|
|
ale_entries = <1024>;
|
|
bd_ram_size = <0x2000>;
|
|
no_bd_ram = <0>;
|
|
rx_descs = <64>;
|
|
mac_control = <0x20>;
|
|
slaves = <2>;
|
|
active_slave = <0>;
|
|
cpts_clock_mult = <0x80000000>;
|
|
cpts_clock_shift = <29>;
|
|
syscon = <&cm>;
|
|
cpsw_emac0: slave@0 {
|
|
phy_id = <&davinci_mdio>, <0>;
|
|
phy-mode = "rgmii-txid";
|
|
/* Filled in by U-Boot */
|
|
mac-address = [ 00 00 00 00 00 00 ];
|
|
};
|
|
cpsw_emac1: slave@1 {
|
|
phy_id = <&davinci_mdio>, <1>;
|
|
phy-mode = "rgmii-txid";
|
|
/* Filled in by U-Boot */
|
|
mac-address = [ 00 00 00 00 00 00 ];
|
|
};
|
|
};
|
|
|
|
(or)
|
|
mac: ethernet@4A100000 {
|
|
compatible = "ti,cpsw";
|
|
ti,hwmods = "cpgmac0";
|
|
cpdma_channels = <8>;
|
|
ale_entries = <1024>;
|
|
bd_ram_size = <0x2000>;
|
|
no_bd_ram = <0>;
|
|
rx_descs = <64>;
|
|
mac_control = <0x20>;
|
|
slaves = <2>;
|
|
active_slave = <0>;
|
|
cpts_clock_mult = <0x80000000>;
|
|
cpts_clock_shift = <29>;
|
|
syscon = <&cm>;
|
|
cpsw_emac0: slave@0 {
|
|
phy_id = <&davinci_mdio>, <0>;
|
|
phy-mode = "rgmii-txid";
|
|
/* Filled in by U-Boot */
|
|
mac-address = [ 00 00 00 00 00 00 ];
|
|
};
|
|
cpsw_emac1: slave@1 {
|
|
phy_id = <&davinci_mdio>, <1>;
|
|
phy-mode = "rgmii-txid";
|
|
/* Filled in by U-Boot */
|
|
mac-address = [ 00 00 00 00 00 00 ];
|
|
};
|
|
};
|