mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-28 22:13:08 +00:00
3a29afcbbf
Alignment with kernel directory name as it have already bindings for
DDR controllers in the directory:
Documentation/devicetree/bindings/memory-controller
PS: the drivers using RAM u-class should be associated with
this binding directory
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
46 lines
1.6 KiB
Text
46 lines
1.6 KiB
Text
Texas Instruments' K3 AM654 DDRSS
|
|
=================================
|
|
|
|
K3 based AM654 devices has DDR memory subsystem that comprises
|
|
Synopys DDR controller, Synopsis DDR phy and wrapper logic to
|
|
integrate these blocks into the device. This DDR subsystem
|
|
provides an interface to external SDRAM devices. This DDRSS driver
|
|
adds support for the initialization of the external SDRAM devices by
|
|
configuring the DDRSS registers and using the buitin PHY
|
|
initialization routines.
|
|
|
|
DDRSS device node:
|
|
==================
|
|
Required properties:
|
|
--------------------
|
|
- compatible: Shall be: "ti,am654-ddrss"
|
|
- reg-names ss - Map the sub system wrapper logic region
|
|
ctl - Map the controller region
|
|
phy - Map the PHY region
|
|
- reg: Contains the register map per reg-names.
|
|
- power-domains: Should contain a phandle to a PM domain provider node
|
|
and an args specifier containing the DDRSS device id
|
|
value. This property is as per the binding,
|
|
doc/device-tree-bindings/power/ti,sci-pm-domain.txt
|
|
- clocks: Must contain an entry for enabling DDR clock. Should
|
|
be defined as per the appropriate clock bindings consumer
|
|
usage in doc/device-tree-bindings/clock/ti,sci-clk.txt
|
|
|
|
|
|
Optional Properties:
|
|
--------------------
|
|
- clock-frequency: Frequency at which DDR pll should be locked.
|
|
If not provided, default frequency will be used.
|
|
|
|
Example (AM65x):
|
|
================
|
|
memory-controller: memory-controller@298e000 {
|
|
compatible = "ti,am654-ddrss";
|
|
reg = <0x0298e000 0x200>,
|
|
<0x02980000 0x4000>,
|
|
<0x02988000 0x2000>;
|
|
reg-names = "ss", "ctl", "phy";
|
|
clocks = <&k3_clks 20 0>;
|
|
power-domains = <&k3_pds 20>;
|
|
u-boot,dm-spl;
|
|
};
|