summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2015-09-02 02:37:56 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-02 02:37:56 (GMT)
commitf1a3c0b933e7ff856223d6fcd7456d403e54e4e5 (patch)
tree248904252b10d6685b5a81f2ba4dc5cf35dcec38
parent089b669506ef28fae2c24a0ec21e06c02a38556b (diff)
parentc8fb70a3e8dd60e31c4422bae85783cf1733f038 (diff)
downloadlinux-f1a3c0b933e7ff856223d6fcd7456d403e54e4e5.tar.xz
Merge tag 'devicetree-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree updates from Rob Herring: - added Frank Rowand as DT maintainer in preparation for Grant's retirement. - generic MSI binding documentation and a few other minor doc updates - fix long standing issue with DT platorm device unregistration - fix loop forever bug in of_find_matching_node_by_address() * tag 'devicetree-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: MAINTAINERS: Add Frank Rowand as DT maintainer mtd: nand: pxa3xx: add optional dma for pxa architecture Documentation: DT: cpsw: document missing compatible Docs: dt: add generic MSI bindings drivercore: Fix unregistration path of platform devices of/address: Don't loop forever in of_find_matching_node_by_address(). of: Add vendor prefix for JEDEC Solid State Technology Association of/platform: add function to populate default bus of: Add vendor prefix for Sharp Corporation
-rw-r--r--Documentation/devicetree/bindings/interrupt-controller/msi.txt135
-rw-r--r--Documentation/devicetree/bindings/mtd/pxa3xx-nand.txt3
-rw-r--r--Documentation/devicetree/bindings/net/cpsw.txt6
-rw-r--r--Documentation/devicetree/bindings/vendor-prefixes.txt2
-rw-r--r--MAINTAINERS3
-rw-r--r--drivers/base/platform.c8
-rw-r--r--drivers/of/address.c6
-rw-r--r--drivers/of/platform.c9
-rw-r--r--include/linux/of_platform.h9
9 files changed, 170 insertions, 11 deletions
diff --git a/Documentation/devicetree/bindings/interrupt-controller/msi.txt b/Documentation/devicetree/bindings/interrupt-controller/msi.txt
new file mode 100644
index 0000000..c60c034
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/msi.txt
@@ -0,0 +1,135 @@
+This document describes the generic device tree binding for MSI controllers and
+their master(s).
+
+Message Signaled Interrupts (MSIs) are a class of interrupts generated by a
+write to an MMIO address.
+
+MSIs were originally specified by PCI (and are used with PCIe), but may also be
+used with other busses, and hence a mechanism is required to relate devices on
+those busses to the MSI controllers which they are capable of using,
+potentially including additional information.
+
+MSIs are distinguished by some combination of:
+
+- The doorbell (the MMIO address written to).
+
+ Devices may be configured by software to write to arbitrary doorbells which
+ they can address. An MSI controller may feature a number of doorbells.
+
+- The payload (the value written to the doorbell).
+
+ Devices may be configured to write an arbitrary payload chosen by software.
+ MSI controllers may have restrictions on permitted payloads.
+
+- Sideband information accompanying the write.
+
+ Typically this is neither configurable nor probeable, and depends on the path
+ taken through the memory system (i.e. it is a property of the combination of
+ MSI controller and device rather than a property of either in isolation).
+
+
+MSI controllers:
+================
+
+An MSI controller signals interrupts to a CPU when a write is made to an MMIO
+address by some master. An MSI controller may feature a number of doorbells.
+
+Required properties:
+--------------------
+
+- msi-controller: Identifies the node as an MSI controller.
+
+Optional properties:
+--------------------
+
+- #msi-cells: The number of cells in an msi-specifier, required if not zero.
+
+ Typically this will encode information related to sideband data, and will
+ not encode doorbells or payloads as these can be configured dynamically.
+
+ The meaning of the msi-specifier is defined by the device tree binding of
+ the specific MSI controller.
+
+
+MSI clients
+===========
+
+MSI clients are devices which generate MSIs. For each MSI they wish to
+generate, the doorbell and payload may be configured, though sideband
+information may not be configurable.
+
+Required properties:
+--------------------
+
+- msi-parent: A list of phandle + msi-specifier pairs, one for each MSI
+ controller which the device is capable of using.
+
+ This property is unordered, and MSIs may be allocated from any combination of
+ MSI controllers listed in the msi-parent property.
+
+ If a device has restrictions on the allocation of MSIs, these restrictions
+ must be described with additional properties.
+
+ When #msi-cells is non-zero, busses with an msi-parent will require
+ additional properties to describe the relationship between devices on the bus
+ and the set of MSIs they can potentially generate.
+
+
+Example
+=======
+
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ msi_a: msi-controller@a {
+ reg = <0xa 0xf00>;
+ compatible = "vendor-a,some-controller";
+ msi-controller;
+ /* No sideband data, so #msi-cells omitted */
+ };
+
+ msi_b: msi-controller@b {
+ reg = <0xb 0xf00>;
+ compatible = "vendor-b,another-controller";
+ msi-controller;
+ /* Each device has some unique ID */
+ #msi-cells = <1>;
+ };
+
+ msi_c: msi-controller@c {
+ reg = <0xb 0xf00>;
+ compatible = "vendor-b,another-controller";
+ msi-controller;
+ /* Each device has some unique ID */
+ #msi-cells = <1>;
+ };
+
+ dev@0 {
+ reg = <0x0 0xf00>;
+ compatible = "vendor-c,some-device";
+
+ /* Can only generate MSIs to msi_a */
+ msi-parent = <&msi_a>;
+ };
+
+ dev@1 {
+ reg = <0x1 0xf00>;
+ compatible = "vendor-c,some-device";
+
+ /*
+ * Can generate MSIs to either A or B.
+ */
+ msi-parent = <&msi_a>, <&msi_b 0x17>;
+ };
+
+ dev@2 {
+ reg = <0x2 0xf00>;
+ compatible = "vendor-c,some-device";
+ /*
+ * Has different IDs at each MSI controller.
+ * Can generate MSIs to all of the MSI controllers.
+ */
+ msi-parent = <&msi_a>, <&msi_b 0x17>, <&msi_c 0x53>;
+ };
+};
diff --git a/Documentation/devicetree/bindings/mtd/pxa3xx-nand.txt b/Documentation/devicetree/bindings/mtd/pxa3xx-nand.txt
index 4f833e3..d9b655f 100644
--- a/Documentation/devicetree/bindings/mtd/pxa3xx-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/pxa3xx-nand.txt
@@ -11,6 +11,7 @@ Required properties:
Optional properties:
+ - dmas: dma data channel, see dma.txt binding doc
- marvell,nand-enable-arbiter: Set to enable the bus arbiter
- marvell,nand-keep-config: Set to keep the NAND controller config as set
by the bootloader
@@ -32,6 +33,8 @@ Example:
compatible = "marvell,pxa3xx-nand";
reg = <0x43100000 90>;
interrupts = <45>;
+ dmas = <&pdma 97 0>;
+ dma-names = "data";
#address-cells = <1>;
marvell,nand-enable-arbiter;
diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt
index 33fe846..a9df21a 100644
--- a/Documentation/devicetree/bindings/net/cpsw.txt
+++ b/Documentation/devicetree/bindings/net/cpsw.txt
@@ -2,7 +2,11 @@ TI SoC Ethernet Switch Controller Device Tree Bindings
------------------------------------------------------
Required properties:
-- compatible : Should be "ti,cpsw"
+- compatible : Should be one of the below:-
+ "ti,cpsw" for backward compatible
+ "ti,am335x-cpsw" for AM335x controllers
+ "ti,am4372-cpsw" for AM437x controllers
+ "ti,dra7-cpsw" for DRA7x controllers
- reg : physical base address and size of the cpsw
registers map
- interrupts : property with a value describing the interrupt
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index d3fbd1f..56a6d4e 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -113,6 +113,7 @@ intel Intel Corporation
intercontrol Inter Control Group
isee ISEE 2007 S.L.
isil Intersil
+jedec JEDEC Solid State Technology Association
karo Ka-Ro electronics GmbH
keymile Keymile GmbH
kinetic Kinetic Technologies
@@ -184,6 +185,7 @@ sbs Smart Battery System
schindler Schindler
seagate Seagate Technology PLC
semtech Semtech Corporation
+sharp Sharp Corporation
sil Silicon Image
silabs Silicon Laboratories
siliconmitus Silicon Mitus, Inc.
diff --git a/MAINTAINERS b/MAINTAINERS
index 532bd5d..6eee6db 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7573,8 +7573,9 @@ F: Documentation/i2c/busses/i2c-ocores
F: drivers/i2c/busses/i2c-ocores.c
OPEN FIRMWARE AND FLATTENED DEVICE TREE
-M: Grant Likely <grant.likely@linaro.org>
M: Rob Herring <robh+dt@kernel.org>
+M: Frank Rowand <frowand.list@gmail.com>
+M: Grant Likely <grant.likely@linaro.org>
L: devicetree@vger.kernel.org
W: http://www.devicetree.org/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux.git
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 063f0ab..f80aaaf 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -375,9 +375,7 @@ int platform_device_add(struct platform_device *pdev)
while (--i >= 0) {
struct resource *r = &pdev->resource[i];
- unsigned long type = resource_type(r);
-
- if (type == IORESOURCE_MEM || type == IORESOURCE_IO)
+ if (r->parent)
release_resource(r);
}
@@ -408,9 +406,7 @@ void platform_device_del(struct platform_device *pdev)
for (i = 0; i < pdev->num_resources; i++) {
struct resource *r = &pdev->resource[i];
- unsigned long type = resource_type(r);
-
- if (type == IORESOURCE_MEM || type == IORESOURCE_IO)
+ if (r->parent)
release_resource(r);
}
}
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 8bfda6a..384574c 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -845,10 +845,10 @@ struct device_node *of_find_matching_node_by_address(struct device_node *from,
struct resource res;
while (dn) {
- if (of_address_to_resource(dn, 0, &res))
- continue;
- if (res.start == base_address)
+ if (!of_address_to_resource(dn, 0, &res) &&
+ res.start == base_address)
return dn;
+
dn = of_find_matching_node(dn, matches);
}
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 8a002d6..1001efa 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -457,6 +457,15 @@ int of_platform_populate(struct device_node *root,
}
EXPORT_SYMBOL_GPL(of_platform_populate);
+int of_platform_default_populate(struct device_node *root,
+ const struct of_dev_auxdata *lookup,
+ struct device *parent)
+{
+ return of_platform_populate(root, of_default_bus_match_table, lookup,
+ parent);
+}
+EXPORT_SYMBOL_GPL(of_platform_default_populate);
+
static int of_platform_device_destroy(struct device *dev, void *data)
{
/* Do not touch devices not populated from the device tree */
diff --git a/include/linux/of_platform.h b/include/linux/of_platform.h
index 611a691..956a100 100644
--- a/include/linux/of_platform.h
+++ b/include/linux/of_platform.h
@@ -72,6 +72,9 @@ extern int of_platform_populate(struct device_node *root,
const struct of_device_id *matches,
const struct of_dev_auxdata *lookup,
struct device *parent);
+extern int of_platform_default_populate(struct device_node *root,
+ const struct of_dev_auxdata *lookup,
+ struct device *parent);
extern void of_platform_depopulate(struct device *parent);
#else
static inline int of_platform_populate(struct device_node *root,
@@ -81,6 +84,12 @@ static inline int of_platform_populate(struct device_node *root,
{
return -ENODEV;
}
+static inline int of_platform_default_populate(struct device_node *root,
+ const struct of_dev_auxdata *lookup,
+ struct device *parent)
+{
+ return -ENODEV;
+}
static inline void of_platform_depopulate(struct device *parent) { }
#endif