[POWERPC] Introduce new CPM device bindings.

This introduces a new device binding for the CPM and other devices on
these boards.  Some of the changes include:

1. Proper namespace scoping for Freescale compatibles and properties.

2. Use compatible rather than things like device_type and model
to determine which particular variant of a device is present.

3. Give the drivers the relevant CPM command word directly, rather than
requiring it to have a lookup table based on device-id, SCC v. SMC, and
CPM version.

4. Specify the CPCR and the usable DPRAM region in the CPM's reg property.

Boards that do not require the legacy bindings should select
CONFIG_PPC_CPM_NEW_BINDING to enable the of_platform CPM devices. Once
all existing boards are converted and tested, the config option can
become default y to prevent new boards from using the old model.  Once
arch/ppc is gone, the config option can be removed altogether.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Scott Wood 2007-09-14 13:04:54 -05:00 committed by Kumar Gala
parent 6d817aa71f
commit e631ae3b16
3 changed files with 183 additions and 1 deletions

View file

@ -1510,7 +1510,10 @@ platforms are moved over to use the flattened-device-tree model.
i) Freescale QUICC Engine module (QE)
This represents qe module that is installed on PowerQUICC II Pro.
Hopefully it will merge backward compatibility with CPM/CPM2.
NOTE: This is an interim binding; it should be updated to fit
in with the CPM binding later in this document.
Basically, it is a bus of devices, that could act more or less
as a complete entity (UCC, USB etc ). All of them should be siblings on
the "root" qe node, using the common properties from there.
@ -1848,6 +1851,172 @@ platforms are moved over to use the flattened-device-tree model.
fsl,has-rstcr;
};
l) Freescale Communications Processor Module
NOTE: This is an interim binding, and will likely change slightly,
as more devices are supported. The QE bindings especially are
incomplete.
i) Root CPM node
Properties:
- compatible : "fsl,cpm1", "fsl,cpm2", or "fsl,qe".
- reg : The first resource is a 48-byte region beginning with
CPCR. The second is the available general-purpose
DPRAM.
Example:
cpm@119c0 {
#address-cells = <1>;
#size-cells = <1>;
#interrupt-cells = <2>;
compatible = "fsl,mpc8272-cpm", "fsl,cpm2";
reg = <119c0 30 0 2000>;
}
ii) Properties common to mulitple CPM/QE devices
- fsl,cpm-command : This value is ORed with the opcode and command flag
to specify the device on which a CPM command operates.
- fsl,cpm-brg : Indicates which baud rate generator the device
is associated with. If absent, an unused BRG
should be dynamically allocated. If zero, the
device uses an external clock rather than a BRG.
- reg : Unless otherwise specified, the first resource represents the
scc/fcc/ucc registers, and the second represents the device's
parameter RAM region (if it has one).
iii) Serial
Currently defined compatibles:
- fsl,cpm1-smc-uart
- fsl,cpm2-smc-uart
- fsl,cpm1-scc-uart
- fsl,cpm2-scc-uart
- fsl,qe-uart
Example:
serial@11a00 {
device_type = "serial";
compatible = "fsl,mpc8272-scc-uart",
"fsl,cpm2-scc-uart";
reg = <11a00 20 8000 100>;
interrupts = <28 8>;
interrupt-parent = <&PIC>;
fsl,cpm-brg = <1>;
fsl,cpm-command = <00800000>;
};
iii) Network
Currently defined compatibles:
- fsl,cpm1-scc-enet
- fsl,cpm2-scc-enet
- fsl,cpm1-fec-enet
- fsl,cpm2-fcc-enet (third resource is GFEMR)
- fsl,qe-enet
Example:
ethernet@11300 {
device_type = "network";
compatible = "fsl,mpc8272-fcc-enet",
"fsl,cpm2-fcc-enet";
reg = <11300 20 8400 100 11390 1>;
local-mac-address = [ 00 00 00 00 00 00 ];
interrupts = <20 8>;
interrupt-parent = <&PIC>;
phy-handle = <&PHY0>;
linux,network-index = <0>;
fsl,cpm-command = <12000300>;
};
iv) MDIO
Currently defined compatibles:
fsl,pq1-fec-mdio (reg is same as first resource of FEC device)
fsl,cpm2-mdio-bitbang (reg is port C registers)
Properties for fsl,cpm2-mdio-bitbang:
fsl,mdio-pin : pin of port C controlling mdio data
fsl,mdc-pin : pin of port C controlling mdio clock
Example:
mdio@10d40 {
device_type = "mdio";
compatible = "fsl,mpc8272ads-mdio-bitbang",
"fsl,mpc8272-mdio-bitbang",
"fsl,cpm2-mdio-bitbang";
reg = <10d40 14>;
#address-cells = <1>;
#size-cells = <0>;
fsl,mdio-pin = <12>;
fsl,mdc-pin = <13>;
};
v) Baud Rate Generators
Currently defined compatibles:
fsl,cpm-brg
fsl,cpm1-brg
fsl,cpm2-brg
Properties:
- reg : There may be an arbitrary number of reg resources; BRG
numbers are assigned to these in order.
- clock-frequency : Specifies the base frequency driving
the BRG.
Example:
brg@119f0 {
compatible = "fsl,mpc8272-brg",
"fsl,cpm2-brg",
"fsl,cpm-brg";
reg = <119f0 10 115f0 10>;
clock-frequency = <d#25000000>;
};
vi) Interrupt Controllers
Currently defined compatibles:
- fsl,cpm1-pic
- only one interrupt cell
- fsl,pq1-pic
- fsl,cpm2-pic
- second interrupt cell is level/sense:
- 2 is falling edge
- 8 is active low
Example:
interrupt-controller@10c00 {
#interrupt-cells = <2>;
interrupt-controller;
reg = <10c00 80>;
compatible = "mpc8272-pic", "fsl,cpm2-pic";
};
vii) USB (Universal Serial Bus Controller)
Properties:
- compatible : "fsl,cpm1-usb", "fsl,cpm2-usb", "fsl,qe-usb"
Example:
usb@11bc0 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,cpm2-usb";
reg = <11b60 18 8b00 100>;
interrupts = <b 8>;
interrupt-parent = <&PIC>;
fsl,cpm-command = <2e600000>;
};
More devices will be defined as this spec matures.
VII - Specifying interrupt information for devices

View file

@ -279,6 +279,17 @@ config CPM2
you wish to build a kernel for a machine with a CPM2 coprocessor
on it (826x, 827x, 8560).
config PPC_CPM_NEW_BINDING
bool
depends on CPM1 || CPM2
help
Select this if your board has been converted to use the new
device tree bindings for CPM, and no longer needs the
ioport callbacks or the platform device glue code.
The fs_enet and cpm_uart drivers will be built as
of_platform devices.
config AXON_RAM
tristate "Axon DDR2 memory device driver"
depends on PPC_IBM_CELL_BLADE

View file

@ -665,6 +665,7 @@ static int __init fsl_usb_of_init(void)
arch_initcall(fsl_usb_of_init);
#ifndef CONFIG_PPC_CPM_NEW_BINDING
#ifdef CONFIG_CPM2
extern void init_scc_ioports(struct fs_uart_platform_info*);
@ -1204,6 +1205,7 @@ static int __init cpm_smc_uart_of_init(void)
arch_initcall(cpm_smc_uart_of_init);
#endif /* CONFIG_8xx */
#endif /* CONFIG_PPC_CPM_NEW_BINDING */
int __init fsl_spi_init(struct spi_board_info *board_infos,
unsigned int num_board_infos,