remoteproc: Introduce wkup_m3_rproc driver

new file mode 100644
index 0000000..ceb6acf
@@ -0,0 +1,41 @@
+Wakeup M3 IPC Driver
+=====================
+
+TI AMx3 family of devices use a Cortex M3 co-processor to help with various
+low power tasks that cannot be controlled from the MPU like suspend/resume
+and certain deep C-states for CPU Idle. Once the wkup_m3_ipc driver uses the
+wkup_m3_rproc driver to boot the wkup_m3, it handles communication with the
+CM3 using IPC registers present in the SoC's control module and a mailbox.
+The wkup_m3_ipc exposes an API to allow the SoC PM code to execute specific
+PM tasks.
+
+Wkup M3 Device Node:
+====================
+A wkup_m3_ipc device node is used to represent a wakeup M3 IP instance within
+an SoC. The sub-mailboxes are represented as child node of this parent node.
+
+Required properties:
+--------------------
+- compatible:		Should be "ti,am3353-wkup-m3-ipc" for AM33xx SoCs
+- reg:			Contains the wkup_m3 register address ranges for
+			ipc-regs.
+- reg-names:		Name for ipc-regs given above
+- interrupts:		Contains the interrupt information for the wkup_m3
+			interrupt that signals the MPU.
+- ti,rproc:		Phandle to the wkup_m3 rproc node so the IPC driver
+			can boot it.
+- mboxes:		Phandles used by IPC framework to get correct mbox
+			channel for communication. Must point to appropriate
+			mbox_wkupm3 child node.
+
+Example:
+--------
+/* AM33xx */
+wkup_m3_ipc: wkup_m3_ipc at 44e11324 {
+	compatible = "ti,am3353-wkup-m3-ipc";
+	reg = <0x44e11324 0x0024>;
+	reg-names = "ipc_regs";
+	interrupts = <78>;
+	ti,rproc = <&wkup_m3>;
+	mboxes = <&mailbox &mbox_wkupm3>;
+};

new file mode 100644
index 0000000..72d6db0
@@ -0,0 +1,31 @@
+EMIF SRAM Driver
+=====================
+
+TI AMx3 family of devices use a similar EMIF to other TI SoCs but have
+different PM requirements. Late suspend code runs from SRAM and requires
+save and restore of EMIF context and placing the SDRAM in and out of
+self-refresh. Because of this, the ti-emif-sram driver introduces
+relocatable PM function that can run from SRAM and place the EMIF in
+the proper state for low-power mode transition.
+
+EMIF Device Node:
+====================
+A emif node is used to represent an EMIF IP instance within an SoC. The node
+must contain a phandle to an sram node so the ti-emif-sram driver can allocate
+space within the sram and copy the relocatable PM functions.
+
+Required properties:
+--------------------
+- compatible:		Should be "ti,am3352-emif" for AM33xx SoCs
+- reg:			Contains the emif register address ranges.
+- sram:			Phandle for generic sram node for the driver
+			to use to copy PM functions to.
+
+Example:
+--------
+/* AM33xx */
+emif: emif at 4c000000 {
+	compatible = "ti,am3352-emif";
+	reg =	<0x4C000000 0x1000>;
+	sram = <&ocmcram>;
+};

new file mode 100644
index 0000000..4d64a23
@@ -0,0 +1,32 @@
+Wakeup M3 Remote Proc Driver
+=====================
+
+TI AMx3 family of devices use a Cortex M3 co-processor to help with various
+low power tasks that cannot be controlled from the MPU. The CM3 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 a wakeup M3 IP instance within
+a SoC.
+
+Required properties:
+--------------------
+- compatible:		Should be "ti,am3353-wkup-m3" for AM33xx SoCs
+- reg:			Contains the wkup_m3 register address ranges for
+			umem and dmem.
+- ti,hwmods:		Name of the hwmod associated with the mailbox
+- ti,no-reset-on-init:	Reset is handled after fw has been loaded, not at
+			init of hwmod.
+
+Example:
+--------
+/* AM33xx */
+wkup_m3: wkup_m3 at 44d00000 {
+	compatible = "ti,am3353-wkup-m3";
+	reg = <0x44d00000 0x4000	/* M3 UMEM */
+	       0x44d80000 0x2000>;	/* M3 DMEM */
+	ti,hwmods = "wkup_m3";
+	ti,no-reset-on-init;
+};

index 7266b21..61cda85 100644
@@ -28,4 +28,15 @@ config KEYSTONE_NAVIGATOR_DMA
 
 	  If unsure, say N.
 
+config WKUP_M3_IPC
+	bool "TI AM33XX Wkup-M3 IPC Driver"
+	depends on WKUP_M3_RPROC
+	select MAILBOX
+	select OMAP2PLUS_MBOX
+	help
+	  TI AM33XX has a Cortex M3 to handle low power transitions. This IPC
+	  driver provides the necessary API to communicate and use the wkup m3
+	  for PM features like Suspend/Resume and boots the wkup_m3 using
+	  wkup_m3_rproc driver.
+
 endif # SOC_TI

index 6bed611..b6b8c8b 100644
@@ -3,3 +3,4 @@
 #
 obj-$(CONFIG_KEYSTONE_NAVIGATOR_QMSS)	+= knav_qmss_queue.o knav_qmss_acc.o
 obj-$(CONFIG_KEYSTONE_NAVIGATOR_DMA)	+= knav_dma.o
+obj-$(CONFIG_WKUP_M3_IPC)		+= wkup_m3_ipc.o

index 6d91c27..02b778e 100644
@@ -41,6 +41,16 @@ config TI_EMIF
 	  parameters and other settings during frequency, voltage and
 	  temperature changes
 
+config TI_EMIF_SRAM
+	bool "Texas Instruments EMIF SRAM driver"
+	depends on SOC_AM33XX
+	help
+	  This driver is for the EMIF module available on Texas Instruments
+	  AM33XX SoCs and is required for PM. Certain parts of the EMIF PM
+	  code must run from on-chip SRAM late in the suspend sequence so
+	  this driver provides several relocatable PM functions for the SoC
+	  PM code to use.
+
 config MVEBU_DEVBUS
 	bool "Marvell EBU Device Bus Controller"
 	default y

index c32d319..42888c2 100644
@@ -13,3 +13,6 @@ obj-$(CONFIG_FSL_IFC)		+= fsl_ifc.o
 obj-$(CONFIG_MVEBU_DEVBUS)	+= mvebu-devbus.o
 obj-$(CONFIG_TEGRA20_MC)	+= tegra20-mc.o
 obj-$(CONFIG_TEGRA30_MC)	+= tegra30-mc.o
+obj-$(CONFIG_TI_EMIF_SRAM)	+= ti-emif-sram.o ti-emif-sram-pm.o
+
+AFLAGS_ti-emif-sram-pm.o	:=-Wa,-march=armv7-a

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index 5e343ba..7fbdb53 100644
@@ -41,6 +41,18 @@ config STE_MODEM_RPROC
 	  This can be either built-in or a loadable module.
 	  If unsure say N.
 
+config WKUP_M3_RPROC
+	bool "AM33xx wkup-m3 remoteproc support"
+	depends on SOC_AM33XX
+	select REMOTEPROC
+	help
+	  Say y here to support AM33xx wkup-m3.
+
+	  Required for Suspend-to-ram and CPUIdle on AM33xx. Allows for
+	  loading of firmware of CM3 PM coprocessor that is present
+	  on AM33xx family of SoCs
+	  If unsure say N.
+
 config DA8XX_REMOTEPROC
 	tristate "DA8xx/OMAP-L13x remoteproc support"
 	depends on ARCH_DAVINCI_DA8XX

index ac2ff75..81b04d1 100644
@@ -9,4 +9,5 @@ remoteproc-y				+= remoteproc_virtio.o
 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

index 41659df..b86d8c0 100644
@@ -848,6 +848,15 @@
 			reg = <0x48310000 0x2000>;
 			interrupts = <111>;
 		};
+
+		wkup_m3_ipc: wkup_m3_ipc at 44e11324 {
+			compatible = "ti,am3353-wkup-m3-ipc";
+			reg = <0x44e11324 0x0024>;
+			reg-names = "ipc_regs";
+			interrupts = <78>;
+			ti,rproc = <&wkup_m3>;
+			mboxes = <&mailbox &mbox_wkupm3>;
+		};
 	};
 };
 

index b86d8c0..b432499 100644
@@ -153,6 +153,12 @@
 			#dma-cells = <1>;
 		};
 
+		emif: emif at 4c000000 {
+			compatible = "ti,am3352-emif";
+			reg =	<0x4C000000 0x1000>;
+			sram = <&ocmcram>;
+		};
+
 		gpio0: gpio at 44e07000 {
 			compatible = "ti,omap4-gpio";
 			ti,hwmods = "gpio1";