Commit 5a6338cc authored by Viresh Kumar's avatar Viresh Kumar Committed by Jassi Brar
Browse files

mailbox: arm_mhuv2: Add driver 



This adds driver for the ARM MHUv2 (Message Handling Unit) mailbox
controller.

This is based on the accepted DT bindings of the controller and supports
combination of both transport protocols, i.e. doorbell and data-transfer.

Transmitting and receiving data through the mailbox framework is done
through struct arm_mhuv2_mbox_msg.

Based on the initial work done by Morten Borup Petersen from ARM.

Co-developed-by: default avatarTushar Khandelwal <tushar.khandelwal@arm.com>
Signed-off-by: default avatarTushar Khandelwal <tushar.khandelwal@arm.com>
Tested-by: default avatarUsama Arif <usama.arif@arm.com>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarJassi Brar <jaswinder.singh@linaro.org>
parent aa80be50

MAINTAINERS

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@@ -10418,6 +10418,15 @@ F: drivers/mailbox/ 
F:	include/linux/mailbox_client.h

F:	include/linux/mailbox_controller.h













MAILBOX ARM MHUv2













M:	Viresh Kumar <viresh.kumar@linaro.org>













M:	Tushar Khandelwal <Tushar.Khandelwal@arm.com>













L:	linux-kernel@vger.kernel.org













S:	Maintained













F:	drivers/mailbox/arm_mhuv2.c













F:	include/linux/mailbox/arm_mhuv2_message.h













F:	Documentation/devicetree/bindings/mailbox/arm,mhuv2.yaml



























MAN-PAGES: MANUAL PAGES FOR LINUX -- Sections 2, 3, 4, 5, and 7















M:	Michael Kerrisk <mtk.manpages@gmail.com>















L:	linux-man@vger.kernel.org

































drivers/mailbox/Kconfig



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@@ -16,6 +16,13 @@ config ARM_MHU













	  The controller has 3 mailbox channels, the last of which can be















	  used in Secure mode only.





























config ARM_MHU_V2













	tristate "ARM MHUv2 Mailbox"













	depends on ARM_AMBA













	help













	  Say Y here if you want to build the ARM MHUv2 controller driver,













	  which provides unidirectional mailboxes between processing elements.





























config IMX_MBOX















	tristate "i.MX Mailbox"















	depends on ARCH_MXC || COMPILE_TEST

































drivers/mailbox/Makefile



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@@ -7,6 +7,8 @@ obj-$(CONFIG_MAILBOX_TEST)	+= mailbox-test.o





























obj-$(CONFIG_ARM_MHU)	+= arm_mhu.o arm_mhu_db.o





























obj-$(CONFIG_ARM_MHU_V2)	+= arm_mhuv2.o





























obj-$(CONFIG_IMX_MBOX)	+= imx-mailbox.o































obj-$(CONFIG_ARMADA_37XX_RWTM_MBOX)	+= armada-37xx-rwtm-mailbox.o

































drivers/mailbox/arm_mhuv2.c
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include/linux/mailbox/arm_mhuv2_message.h
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// SPDX-License-Identifier: GPL-2.0













/*













 * ARM MHUv2 Mailbox Message













 *













 * Copyright (C) 2020 Arm Ltd.













 * Copyright (C) 2020 Linaro Ltd.













 */



























#ifndef _LINUX_ARM_MHUV2_MESSAGE_H_













#define _LINUX_ARM_MHUV2_MESSAGE_H_



























#include <linux/types.h>



























/* Data structure for data-transfer protocol */













struct arm_mhuv2_mbox_msg {













	void *data;













	size_t len;













};



























#endif /* _LINUX_ARM_MHUV2_MESSAGE_H_ */


























































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