korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-16 00:34:20 +08:00
Code Issues Packages Projects Releases Wiki Activity

ARM: vexpress: Remove motherboard dependencies in the DTS files

Browse Source 
The way the VE motherboard Device Trees were constructed
enforced naming and structure of daughterboard files. This
patch makes it possible to simply include the motherboard
description anywhere in the main Device Tree and retires
the "arm,v2m-timer" alias - any of the motherboard SP804
timers will be used instead.

Signed-off-by: Pawel Moll <pawel.moll@arm.com>
This commit is contained in:
Pawel Moll 2012-10-16 15:27:12 +01:00
parent 38669e045d
commit 433683a664
8 changed files with 73 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
Documentation/devicetree/bindings/arm/vexpress.txt
View File

@ -141,14 +141,19 @@ can be used to obtain required phandle in the tile's "aliases" node:
- SP804 timers:
v2m_timer01 and v2m_timer23
Current Linux implementation requires a "arm,v2m_timer" alias
pointing at one of the motherboard's SP804 timers, if it is to be
used as the system timer. This alias should be defined in the
motherboard files.
The tile description must define "ranges", "interrupt-map-mask" and
"interrupt-map" properties to translate the motherboard's address
and interrupt space into one used by the tile's processor.
The tile description should define a "smb" node, describing the
Static Memory Bus between the tile and motherboard. It must define
the following properties:
- "simple-bus" compatible value (to ensure creation of the children)
compatible = "simple-bus";
- mapping of the SMB CS/offset addresses into main address space:
#address-cells = <2>;
#size-cells = <1>;
ranges = <...>;
- interrupts mapping:
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 63>;
interrupt-map = <...>;
Example of a VE tile description (simplified)
@ -200,13 +205,20 @@ Example of a VE tile description (simplified)
};
};
motherboard {
smb {
compatible = "simple-bus";
#address-cells = <2>;
#size-cells = <1>;
/* CS0 is visible at 0x08000000 */
ranges = <0 0 0x08000000 0x04000000>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 63>;
/* Active high IRQ 0 is connected to GIC's SPI0 */
interrupt-map = <0 0 0 &gic 0 0 4>;
/include/ "vexpress-v2m-rs1.dtsi"
};
};
/include/ "vexpress-v2m-rs1.dtsi"

11
arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
View File

@ -17,18 +17,16 @@
* CHANGES TO vexpress-v2m.dtsi!
*/
/ {
aliases {
arm,v2m_timer = &v2m_timer01;
};
motherboard {
compatible = "simple-bus";
model = "V2M-P1";
arm,hbi = <0x190>;
arm,vexpress,site = <0>;
arm,v2m-memory-map = "rs1";
compatible = "arm,vexpress,v2m-p1", "simple-bus";
#address-cells = <2>; /* SMB chipselect number and offset */
#size-cells = <1>;
#interrupt-cells = <1>;
ranges;
flash@0,00000000 {
compatible = "arm,vexpress-flash", "cfi-flash";
@ -340,4 +338,3 @@
};
};
};
};

11
arch/arm/boot/dts/vexpress-v2m.dtsi
View File

@ -17,17 +17,15 @@
* CHANGES TO vexpress-v2m-rs1.dtsi!
*/
/ {
aliases {
arm,v2m_timer = &v2m_timer01;
};
motherboard {
compatible = "simple-bus";
model = "V2M-P1";
arm,hbi = <0x190>;
arm,vexpress,site = <0>;
compatible = "arm,vexpress,v2m-p1", "simple-bus";
#address-cells = <2>; /* SMB chipselect number and offset */
#size-cells = <1>;
#interrupt-cells = <1>;
ranges;
flash@0,00000000 {
compatible = "arm,vexpress-flash", "cfi-flash";
@ -339,4 +337,3 @@
};
};
};
};

11
arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
View File

@ -220,7 +220,11 @@
};
};
motherboard {
smb {
compatible = "simple-bus";
#address-cells = <2>;
#size-cells = <1>;
ranges = <0 0 0 0x08000000 0x04000000>,
<1 0 0 0x14000000 0x04000000>,
<2 0 0 0x18000000 0x04000000>,
@ -228,6 +232,7 @@
<4 0 0 0x0c000000 0x04000000>,
<5 0 0 0x10000000 0x04000000>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 63>;
interrupt-map = <0 0 0 &gic 0 0 4>,
<0 0 1 &gic 0 1 4>,
@ -272,7 +277,7 @@
<0 0 40 &gic 0 40 4>,
<0 0 41 &gic 0 41 4>,
<0 0 42 &gic 0 42 4>;
/include/ "vexpress-v2m-rs1.dtsi"
};
};
/include/ "vexpress-v2m-rs1.dtsi"

11
arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
View File

@ -305,7 +305,11 @@
};
};
motherboard {
smb {
compatible = "simple-bus";
#address-cells = <2>;
#size-cells = <1>;
ranges = <0 0 0 0x08000000 0x04000000>,
<1 0 0 0x14000000 0x04000000>,
<2 0 0 0x18000000 0x04000000>,
@ -313,6 +317,7 @@
<4 0 0 0x0c000000 0x04000000>,
<5 0 0 0x10000000 0x04000000>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 63>;
interrupt-map = <0 0 0 &gic 0 0 4>,
<0 0 1 &gic 0 1 4>,
@ -357,7 +362,7 @@
<0 0 40 &gic 0 40 4>,
<0 0 41 &gic 0 41 4>,
<0 0 42 &gic 0 42 4>;
/include/ "vexpress-v2m-rs1.dtsi"
};
};
/include/ "vexpress-v2m-rs1.dtsi"

11
arch/arm/boot/dts/vexpress-v2p-ca5s.dts
View File

@ -182,7 +182,11 @@
};
};
motherboard {
smb {
compatible = "simple-bus";
#address-cells = <2>;
#size-cells = <1>;
ranges = <0 0 0x08000000 0x04000000>,
<1 0 0x14000000 0x04000000>,
<2 0 0x18000000 0x04000000>,
@ -190,6 +194,7 @@
<4 0 0x0c000000 0x04000000>,
<5 0 0x10000000 0x04000000>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 63>;
interrupt-map = <0 0 0 &gic 0 0 4>,
<0 0 1 &gic 0 1 4>,
@ -234,7 +239,7 @@
<0 0 40 &gic 0 40 4>,
<0 0 41 &gic 0 41 4>,
<0 0 42 &gic 0 42 4>;
/include/ "vexpress-v2m-rs1.dtsi"
};
};
/include/ "vexpress-v2m-rs1.dtsi"

11
arch/arm/boot/dts/vexpress-v2p-ca9.dts
View File

@ -265,13 +265,18 @@
};
};
motherboard {
smb {
compatible = "simple-bus";
#address-cells = <2>;
#size-cells = <1>;
ranges = <0 0 0x40000000 0x04000000>,
<1 0 0x44000000 0x04000000>,
<2 0 0x48000000 0x04000000>,
<3 0 0x4c000000 0x04000000>,
<7 0 0x10000000 0x00020000>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 63>;
interrupt-map = <0 0 0 &gic 0 0 4>,
<0 0 1 &gic 0 1 4>,
@ -316,7 +321,7 @@
<0 0 40 &gic 0 40 4>,
<0 0 41 &gic 0 41 4>,
<0 0 42 &gic 0 42 4>;
/include/ "vexpress-v2m.dtsi"
};
};
/include/ "vexpress-v2m.dtsi"

19
arch/arm/mach-vexpress/v2m.c
View File

@ -446,17 +446,20 @@ static void __init v2m_dt_init_irq(void)
static void __init v2m_dt_timer_init(void)
{
struct device_node *node;
const char *path;
int err;
struct device_node *node = NULL;
vexpress_clk_of_init();
err = of_property_read_string(of_aliases, "arm,v2m_timer", &path);
if (WARN_ON(err))
return;
node = of_find_node_by_path(path);
v2m_sp804_init(of_iomap(node, 0), irq_of_parse_and_map(node, 0));
do {
node = of_find_compatible_node(node, NULL, "arm,sp804");
} while (node && vexpress_get_site_by_node(node) != VEXPRESS_SITE_MB);
if (node) {
pr_info("Using SP804 '%s' as a clock & events source\n",
node->full_name);
v2m_sp804_init(of_iomap(node, 0),
irq_of_parse_and_map(node, 0));
}
if (arch_timer_of_register() != 0)
twd_local_timer_of_register();