Merge tag 'remoteproc-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc

TI Wakeup M3 Remoteproc Driver

==============================

The TI AM33xx and AM43xx family of devices use a small Cortex M3 co-processor

(commonly referred to as Wakeup M3 or CM3) to help with various low power tasks

that cannot be controlled from the MPU. This CM3 processor requires a firmware

binary to accomplish this. The wkup_m3 remoteproc driver handles the loading of

the firmware and booting of the CM3.

Wkup M3 Device Node:

====================

A wkup_m3 device node is used to represent the Wakeup M3 processor instance

within the SoC. It is added as a child node of the parent interconnect bus

(l4_wkup) through which it is accessible to the MPU.

Required properties:

--------------------

- compatible:		Should be one of,

				"ti,am3352-wkup-m3" for AM33xx SoCs

				"ti,am4372-wkup-m3" for AM43xx SoCs

- reg:			Should contain the address ranges for the two internal

			memory regions, UMEM and DMEM. The parent node should

			provide an appropriate ranges property for properly

			translating these into bus addresses.

- reg-names:		Contains the corresponding names for the two memory

			regions. These should be named "umem" & "dmem".

- ti,hwmods:		Name of the hwmod associated with the wkupm3 device.

- ti,pm-firmware:	Name of firmware file to be used for loading and

			booting the wkup_m3 remote processor.

Example:

--------

/* AM33xx */

ocp {

	 l4_wkup: l4_wkup@44c00000 {

		compatible = "am335-l4-wkup", "simple-bus";

		ranges = <0 0x44c00000 0x400000>;

		#address-cells = <1>;

		#size-cells = <1>;

		wkup_m3: wkup_m3@100000 {

			compatible = "ti,am3352-wkup-m3";

			reg = <0x100000 0x4000>,

			      <0x180000 0x2000>;

			reg-names = "umem", "dmem";

			ti,hwmods = "wkup_m3";

			ti,pm-firmware = "am335x-pm-firmware.elf";

		};

	};

	...

};

        rproc_shutdown() returns, and users can still use it with a subsequent

        rproc_boot(), if needed.

  struct rproc *rproc_get_by_phandle(phandle phandle)

    - Find an rproc handle using a device tree phandle. Returns the rproc

      handle on success, and NULL on failure. This function increments

      the remote processor's refcount, so always use rproc_put() to

      decrement it back once rproc isn't needed anymore.

3. Typical usage

#include <linux/remoteproc.h>

	  This can be either built-in or a loadable module.

	  If unsure say N.

config WKUP_M3_RPROC

	tristate "AMx3xx Wakeup M3 remoteproc support"

	depends on SOC_AM33XX || SOC_AM43XX

	select REMOTEPROC

	help

	  Say y here to support Wakeup M3 remote processor on TI AM33xx

	  and AM43xx family of SoCs.

	  Required for Suspend-to-RAM on AM33xx and AM43xx SoCs. Also needed

	  for deep CPUIdle states on AM33xx SoCs. Allows for loading of the

	  firmware onto these remote processors.

	  If unsure say N.

config DA8XX_REMOTEPROC

	tristate "DA8xx/OMAP-L13x remoteproc support"

	depends on ARCH_DAVINCI_DA8XX

remoteproc-y				+= remoteproc_elf_loader.o

obj-$(CONFIG_OMAP_REMOTEPROC)		+= omap_remoteproc.o

obj-$(CONFIG_STE_MODEM_RPROC)	 	+= ste_modem_rproc.o

obj-$(CONFIG_WKUP_M3_RPROC)		+= wkup_m3_rproc.o

obj-$(CONFIG_DA8XX_REMOTEPROC)		+= da8xx_remoteproc.o

static char *da8xx_fw_name;

module_param(da8xx_fw_name, charp, S_IRUGO);

MODULE_PARM_DESC(da8xx_fw_name,

		 "\n\t\tName of DSP firmware file in /lib/firmware"

		 " (if not specified defaults to 'rproc-dsp-fw')");

		 "Name of DSP firmware file in /lib/firmware (if not specified defaults to 'rproc-dsp-fw')");

/*

 * OMAP-L138 Technical References: