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Commit 426b8eeb authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'rpmsg-v4.13' of git://github.com/andersson/remoteproc 

Pull rpmsg updates from Bjorn Andersson:
 "This introduces the Qualcomm GLINK protocol driver and
  DeviceTree-based modalias support, as well as a number of smaller
  fixes"

* tag 'rpmsg-v4.13' of git://github.com/andersson/remoteproc:
  rpmsg: Make modalias work for DeviceTree based devices
  rpmsg: Drop VIRTUALIZATION dependency from RPMSG_VIRTIO
  rpmsg: Don't overwrite release op of rpdev
  rpmsg: virtio_rpmsg_bus: cleanup multiple assignment to ops
  rpmsg: virtio_rpmsg_bus: fix nameservice address
  rpmsg: cleanup incorrect function in dev_err message
  rpmsg: virtio_rpmsg_bus: fix announce for devices without endpoint
  rpmsg: Introduce Qualcomm RPM glink driver
  soc: qcom: Add device tree binding for GLINK RPM
  rpmsg: Release rpmsg devices in backends
parents 0dfaeb61 f4ce8528

Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt

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+73 −0
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Qualcomm RPM GLINK binding



This binding describes the Qualcomm RPM GLINK, a fifo based mechanism for

communication with the Resource Power Management system on various Qualcomm

platforms.



- compatible:

	Usage: required

	Value type: <stringlist>

	Definition: must be "qcom,glink-rpm"



- interrupts:

	Usage: required

	Value type: <prop-encoded-array>

	Definition: should specify the IRQ used by the remote processor to

		    signal this processor about communication related events



- qcom,rpm-msg-ram:

	Usage: required

	Value type: <prop-encoded-array>

	Definition: handle to RPM message memory resource



- mboxes:

	Usage: required

	Value type: <prop-encoded-array>

	Definition: reference to the "rpm_hlos" mailbox in APCS, as described

		    in mailbox/mailbox.txt



= GLINK DEVICES

Each subnode of the GLINK node represent function tied to a virtual

communication channel. The name of the nodes are not important. The properties

of these nodes are defined by the individual bindings for the specific function

- but must contain the following property:



- qcom,glink-channels:

	Usage: required

	Value type: <stringlist>

	Definition: a list of channels tied to this function, used for matching

		    the function to a set of virtual channels



= EXAMPLE

The following example represents the GLINK RPM node on a MSM8996 device, with

the function for the "rpm_request" channel defined, which is used for

regualtors and root clocks.



	apcs_glb: mailbox@9820000 {

		compatible = "qcom,msm8996-apcs-hmss-global";

		reg = <0x9820000 0x1000>;



		#mbox-cells = <1>;

	};



	rpm_msg_ram: memory@68000 {

		compatible = "qcom,rpm-msg-ram";

		reg = <0x68000 0x6000>;

	};



	rpm-glink {

		compatible = "qcom,glink-rpm";



		interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;



		qcom,rpm-msg-ram = <&rpm_msg_ram>;



		mboxes = <&apcs_glb 0>;



		rpm-requests {

			compatible = "qcom,rpm-msm8996";

			qcom,glink-channels = "rpm_requests";



			...

		};

	};

drivers/rpmsg/Kconfig

+10 −1
Original line number Diff line number Diff line
@@ -13,6 +13,16 @@ config RPMSG_CHAR 
	  in /dev. They make it possible for user-space programs to send and

	  receive rpmsg packets.



config RPMSG_QCOM_GLINK_RPM

	tristate "Qualcomm RPM Glink driver"

	select RPMSG

	depends on HAS_IOMEM

	depends on MAILBOX

	help

	  Say y here to enable support for the GLINK RPM communication driver,

	  which serves as a channel for communication with the RPM in GLINK

	  enabled systems.



config RPMSG_QCOM_SMD

	tristate "Qualcomm Shared Memory Driver (SMD)"

	depends on QCOM_SMEM
@@ -26,6 +36,5 @@ config RPMSG_VIRTIO 
	tristate

	select RPMSG

	select VIRTIO

	select VIRTUALIZATION



endmenu

drivers/rpmsg/Makefile

+1 −0
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obj-$(CONFIG_RPMSG)		+= rpmsg_core.o

obj-$(CONFIG_RPMSG_CHAR)	+= rpmsg_char.o

obj-$(CONFIG_RPMSG_QCOM_GLINK_RPM) += qcom_glink_rpm.o

obj-$(CONFIG_RPMSG_QCOM_SMD)	+= qcom_smd.o

obj-$(CONFIG_RPMSG_VIRTIO)	+= virtio_rpmsg_bus.o

drivers/rpmsg/qcom_glink_rpm.c

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+1233 −0

File added.

Preview size limit exceeded, changes collapsed.

drivers/rpmsg/qcom_smd.c

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@@ -969,6 +969,14 @@ static const struct rpmsg_endpoint_ops qcom_smd_endpoint_ops = { 
	.poll = qcom_smd_poll,

};



static void qcom_smd_release_device(struct device *dev)

{

	struct rpmsg_device *rpdev = to_rpmsg_device(dev);

	struct qcom_smd_device *qsdev = to_smd_device(rpdev);



	kfree(qsdev);

}



/*

 * Create a smd client device for channel that is being opened.

 */
@@ -998,6 +1006,7 @@ static int qcom_smd_create_device(struct qcom_smd_channel *channel) 


	rpdev->dev.of_node = qcom_smd_match_channel(edge->of_node, channel->name);

	rpdev->dev.parent = &edge->dev;

	rpdev->dev.release = qcom_smd_release_device;



	return rpmsg_register_device(rpdev);

}
@@ -1013,6 +1022,8 @@ static int qcom_smd_create_chrdev(struct qcom_smd_edge *edge) 
	qsdev->edge = edge;

	qsdev->rpdev.ops = &qcom_smd_device_ops;

	qsdev->rpdev.dev.parent = &edge->dev;

	qsdev->rpdev.dev.release = qcom_smd_release_device;



	return rpmsg_chrdev_register_device(&qsdev->rpdev);

}