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authorLinus Torvalds <torvalds@linux-foundation.org>2018-10-26 19:11:43 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-10-26 19:11:43 +0300
commit18d0eae30e6a4f8644d589243d7ac1d70d29203d (patch)
treefef5a78d54b8763cb17867018356cfe311b31036 /Documentation/devicetree
parent26873acacbdbb4e4b444f5dd28dcc4853f0e8ba2 (diff)
parent14fdc2c5318ae420e68496975f48dc1dbef52649 (diff)
downloadlinux-18d0eae30e6a4f8644d589243d7ac1d70d29203d.tar.xz
Merge tag 'char-misc-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH: "Here is the big set of char/misc patches for 4.20-rc1. Loads of things here, we have new code in all of these driver subsystems: - fpga - stm - extcon - nvmem - eeprom - hyper-v - gsmi - coresight - thunderbolt - vmw_balloon - goldfish - soundwire along with lots of fixes and minor changes to other small drivers. All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (245 commits) Documentation/security-bugs: Clarify treatment of embargoed information lib: Fix ia64 bootloader linkage MAINTAINERS: Clarify UIO vs UIOVEC maintainer docs/uio: fix a grammar nitpick docs: fpga: document programming fpgas using regions fpga: add devm_fpga_region_create fpga: bridge: add devm_fpga_bridge_create fpga: mgr: add devm_fpga_mgr_create hv_balloon: Replace spin_is_locked() with lockdep sgi-xp: Replace spin_is_locked() with lockdep eeprom: New ee1004 driver for DDR4 memory eeprom: at25: remove unneeded 'at25_remove' w1: IAD Register is yet readable trough iad sys file. Fix snprintf (%u for unsigned, count for max size). misc: mic: scif: remove set but not used variables 'src_dma_addr, dst_dma_addr' misc: mic: fix a DMA pool free failure platform: goldfish: pipe: Add a blank line to separate varibles and code platform: goldfish: pipe: Remove redundant casting platform: goldfish: pipe: Call misc_deregister if init fails platform: goldfish: pipe: Move the file-scope goldfish_pipe_dev variable into the driver state platform: goldfish: pipe: Move the file-scope goldfish_pipe_miscdev variable into the driver state ...
Diffstat (limited to 'Documentation/devicetree')
-rw-r--r--Documentation/devicetree/bindings/arm/coresight.txt120
1 files changed, 65 insertions, 55 deletions
diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
index 5d1ad09bafb4..f8aff65ab921 100644
--- a/Documentation/devicetree/bindings/arm/coresight.txt
+++ b/Documentation/devicetree/bindings/arm/coresight.txt
@@ -54,9 +54,7 @@ its hardware characteristcs.
clocks the core of that coresight component. The latter clock
is optional.
- * port or ports: The representation of the component's port
- layout using the generic DT graph presentation found in
- "bindings/graph.txt".
+ * port or ports: see "Graph bindings for Coresight" below.
* Additional required properties for System Trace Macrocells (STM):
* reg: along with the physical base address and length of the register
@@ -73,7 +71,7 @@ its hardware characteristcs.
AMBA markee):
- "arm,coresight-replicator"
- * port or ports: same as above.
+ * port or ports: see "Graph bindings for Coresight" below.
* Optional properties for ETM/PTMs:
@@ -96,6 +94,20 @@ its hardware characteristcs.
* interrupts : Exactly one SPI may be listed for reporting the address
error
+Graph bindings for Coresight
+-------------------------------
+
+Coresight components are interconnected to create a data path for the flow of
+trace data generated from the "sources" to their collection points "sink".
+Each coresight component must describe the "input" and "output" connections.
+The connections must be described via generic DT graph bindings as described
+by the "bindings/graph.txt", where each "port" along with an "endpoint"
+component represents a hardware port and the connection.
+
+ * All output ports must be listed inside a child node named "out-ports"
+ * All input ports must be listed inside a child node named "in-ports".
+ * Port address must match the hardware port number.
+
Example:
1. Sinks
@@ -105,10 +117,11 @@ Example:
clocks = <&oscclk6a>;
clock-names = "apb_pclk";
- port {
- etb_in_port: endpoint@0 {
- slave-mode;
- remote-endpoint = <&replicator_out_port0>;
+ in-ports {
+ port {
+ etb_in_port: endpoint@0 {
+ remote-endpoint = <&replicator_out_port0>;
+ };
};
};
};
@@ -119,10 +132,11 @@ Example:
clocks = <&oscclk6a>;
clock-names = "apb_pclk";
- port {
- tpiu_in_port: endpoint@0 {
- slave-mode;
- remote-endpoint = <&replicator_out_port1>;
+ in-ports {
+ port {
+ tpiu_in_port: endpoint@0 {
+ remote-endpoint = <&replicator_out_port1>;
+ };
};
};
};
@@ -133,22 +147,16 @@ Example:
clocks = <&oscclk6a>;
clock-names = "apb_pclk";
- ports {
- #address-cells = <1>;
- #size-cells = <0>;
-
- /* input port */
- port@0 {
- reg = <0>;
+ in-ports {
+ port {
etr_in_port: endpoint {
- slave-mode;
remote-endpoint = <&replicator2_out_port0>;
};
};
+ };
- /* CATU link represented by output port */
- port@1 {
- reg = <1>;
+ out-ports {
+ port {
etr_out_port: endpoint {
remote-endpoint = <&catu_in_port>;
};
@@ -163,7 +171,7 @@ Example:
*/
compatible = "arm,coresight-replicator";
- ports {
+ out-ports {
#address-cells = <1>;
#size-cells = <0>;
@@ -181,12 +189,11 @@ Example:
remote-endpoint = <&tpiu_in_port>;
};
};
+ };
- /* replicator input port */
- port@2 {
- reg = <0>;
+ in-ports {
+ port {
replicator_in_port0: endpoint {
- slave-mode;
remote-endpoint = <&funnel_out_port0>;
};
};
@@ -199,40 +206,36 @@ Example:
clocks = <&oscclk6a>;
clock-names = "apb_pclk";
- ports {
- #address-cells = <1>;
- #size-cells = <0>;
-
- /* funnel output port */
- port@0 {
- reg = <0>;
+ out-ports {
+ port {
funnel_out_port0: endpoint {
remote-endpoint =
<&replicator_in_port0>;
};
};
+ };
- /* funnel input ports */
- port@1 {
+ in-ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
reg = <0>;
funnel_in_port0: endpoint {
- slave-mode;
remote-endpoint = <&ptm0_out_port>;
};
};
- port@2 {
+ port@1 {
reg = <1>;
funnel_in_port1: endpoint {
- slave-mode;
remote-endpoint = <&ptm1_out_port>;
};
};
- port@3 {
+ port@2 {
reg = <2>;
funnel_in_port2: endpoint {
- slave-mode;
remote-endpoint = <&etm0_out_port>;
};
};
@@ -248,9 +251,11 @@ Example:
cpu = <&cpu0>;
clocks = <&oscclk6a>;
clock-names = "apb_pclk";
- port {
- ptm0_out_port: endpoint {
- remote-endpoint = <&funnel_in_port0>;
+ out-ports {
+ port {
+ ptm0_out_port: endpoint {
+ remote-endpoint = <&funnel_in_port0>;
+ };
};
};
};
@@ -262,9 +267,11 @@ Example:
cpu = <&cpu1>;
clocks = <&oscclk6a>;
clock-names = "apb_pclk";
- port {
- ptm1_out_port: endpoint {
- remote-endpoint = <&funnel_in_port1>;
+ out-ports {
+ port {
+ ptm1_out_port: endpoint {
+ remote-endpoint = <&funnel_in_port1>;
+ };
};
};
};
@@ -278,9 +285,11 @@ Example:
clocks = <&soc_smc50mhz>;
clock-names = "apb_pclk";
- port {
- stm_out_port: endpoint {
- remote-endpoint = <&main_funnel_in_port2>;
+ out-ports {
+ port {
+ stm_out_port: endpoint {
+ remote-endpoint = <&main_funnel_in_port2>;
+ };
};
};
};
@@ -295,10 +304,11 @@ Example:
clock-names = "apb_pclk";
interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
- port {
- catu_in_port: endpoint {
- slave-mode;
- remote-endpoint = <&etr_out_port>;
+ in-ports {
+ port {
+ catu_in_port: endpoint {
+ remote-endpoint = <&etr_out_port>;
+ };
};
};
};