Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration

The PDC driver manages data transfer to and from various offload engines

on some Broadcom SoCs. An SoC may have multiple PDC hardware blocks. There is

one device tree entry per block.

Required properties:

- compatible : Should be "brcm,iproc-pdc-mbox".

- reg: Should contain PDC registers location and length.

- interrupts: Should contain the IRQ line for the PDC.

- #mbox-cells: 1

- brcm,rx-status-len: Length of metadata preceding received frames, in bytes.

Optional properties:

- brcm,use-bcm-hdr:  present if a BCM header precedes each frame.

Example:

	pdc0: iproc-pdc0@0x612c0000 {

		compatible = "brcm,iproc-pdc-mbox";

		reg = <0 0x612c0000 0 0x445>;  /* PDC FS0 regs */

		interrupts = <GIC_SPI 187 IRQ_TYPE_LEVEL_HIGH>;

		#mbox-cells = <1>;   /* one cell per mailbox channel */

		brcm,rx-status-len = <32>;

		brcm,use-bcm-hdr;

	};

	  It is used to send short messages between ARM64-bit cores and

	  the SLIMpro Management Engine, primarily for PM. Say Y here if you

	  want to use the APM X-Gene SLIMpro IPCM support.

config BCM_PDC_MBOX

	tristate "Broadcom PDC Mailbox"

	depends on ARM64 || COMPILE_TEST

	default ARCH_BCM_IPROC

	help

	  Mailbox implementation for the Broadcom PDC ring manager,

	  which provides access to various offload engines on Broadcom

	  SoCs. Say Y here if you want to use the Broadcom PDC.

endif

obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o

obj-$(CONFIG_HI6220_MBOX)	+= hi6220-mailbox.o

obj-$(CONFIG_BCM_PDC_MBOX)	+= bcm-pdc-mailbox.o

out:

	kfree(tdev->signal);

	kfree(tdev->message);

	tdev->signal = NULL;

	return ret < 0 ? ret : count;

}