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authorSascha Hauer <s.hauer@pengutronix.de>2014-04-25 11:22:32 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2014-04-28 09:08:46 +0200
commit00ce25c6dcdae5582ae4be37147ab33678adc995 (patch)
tree41c93102ae304a61738c31353e3cb5336ef0b297 /dts/Bindings/x86
parent0af79fbb6779921d3f1962773adb7fb57d3c89d4 (diff)
downloadbarebox-00ce25c6dcdae5582ae4be37147ab33678adc995.tar.gz
barebox-00ce25c6dcdae5582ae4be37147ab33678adc995.tar.xz
Add devicetree source files as of Linux-3.15-rc2
This adds the Linux dts files to barebox. The dts files are generated from Ian Campbells device-tree-rebasing.git: git://xenbits.xen.org/people/ianc/device-tree-rebasing.git The dts are found in dts/ in the barebox repository and will be updated from upstream regularly, probably for each upstream -rc. To keep the synchronization with upstream easy no changes to the original files are allowed under dts/. Instead changes to upstream dts files will be done using overlays in arch/$ARCH/dts/. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'dts/Bindings/x86')
-rw-r--r--dts/Bindings/x86/ce4100.txt38
-rw-r--r--dts/Bindings/x86/interrupt.txt26
-rw-r--r--dts/Bindings/x86/timer.txt6
3 files changed, 70 insertions, 0 deletions
diff --git a/dts/Bindings/x86/ce4100.txt b/dts/Bindings/x86/ce4100.txt
new file mode 100644
index 0000000000..b49ae593a6
--- /dev/null
+++ b/dts/Bindings/x86/ce4100.txt
@@ -0,0 +1,38 @@
+CE4100 Device Tree Bindings
+---------------------------
+
+The CE4100 SoC uses for in core peripherals the following compatible
+format: <vendor>,<chip>-<device>.
+Many of the "generic" devices like HPET or IO APIC have the ce4100
+name in their compatible property because they first appeared in this
+SoC.
+
+The CPU node
+------------
+ cpu@0 {
+ device_type = "cpu";
+ compatible = "intel,ce4100";
+ reg = <0>;
+ lapic = <&lapic0>;
+ };
+
+The reg property describes the CPU number. The lapic property points to
+the local APIC timer.
+
+The SoC node
+------------
+
+This node describes the in-core peripherals. Required property:
+ compatible = "intel,ce4100-cp";
+
+The PCI node
+------------
+This node describes the PCI bus on the SoC. Its property should be
+ compatible = "intel,ce4100-pci", "pci";
+
+If the OS is using the IO-APIC for interrupt routing then the reported
+interrupt numbers for devices is no longer true. In order to obtain the
+correct interrupt number, the child node which represents the device has
+to contain the interrupt property. Besides the interrupt property it has
+to contain at least the reg property containing the PCI bus address and
+compatible property according to "PCI Bus Binding Revision 2.1".
diff --git a/dts/Bindings/x86/interrupt.txt b/dts/Bindings/x86/interrupt.txt
new file mode 100644
index 0000000000..7d19f494f1
--- /dev/null
+++ b/dts/Bindings/x86/interrupt.txt
@@ -0,0 +1,26 @@
+Interrupt chips
+---------------
+
+* Intel I/O Advanced Programmable Interrupt Controller (IO APIC)
+
+ Required properties:
+ --------------------
+ compatible = "intel,ce4100-ioapic";
+ #interrupt-cells = <2>;
+
+ Device's interrupt property:
+
+ interrupts = <P S>;
+
+ The first number (P) represents the interrupt pin which is wired to the
+ IO APIC. The second number (S) represents the sense of interrupt which
+ should be configured and can be one of:
+ 0 - Edge Rising
+ 1 - Level Low
+ 2 - Level High
+ 3 - Edge Falling
+
+* Local APIC
+ Required property:
+
+ compatible = "intel,ce4100-lapic";
diff --git a/dts/Bindings/x86/timer.txt b/dts/Bindings/x86/timer.txt
new file mode 100644
index 0000000000..c688af58e3
--- /dev/null
+++ b/dts/Bindings/x86/timer.txt
@@ -0,0 +1,6 @@
+Timers
+------
+
+* High Precision Event Timer (HPET)
+ Required property:
+ compatible = "intel,ce4100-hpet";