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mailbox: Add support for Armada 37xx rWTM mailbox

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This adds support for the mailbox via which the kernel can communicate
with the firmware running on the secure processor of the Armada 37xx
SOC.

The rWTM secure processor has access to internal eFuses and
cryptographic circuits, such as the Entropy Bit Generator to generate
true random numbers.

Signed-off-by: Marek Behun <marek.behun@nic.cz>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
This commit is contained in:
Marek Behun 2019-03-31 05:15:33 +02:00 • committed by Jassi Brar
parent 004c35cd8e
commit 8fbbfd966e
4 changed files with 260 additions and 0 deletions
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23
include/linux/armada-37xx-rwtm-mailbox.h Normal file
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* rWTM BIU Mailbox driver for Armada 37xx
*
* Author: Marek Behun <marek.behun@nic.cz>
*/
#ifndef _LINUX_ARMADA_37XX_RWTM_MAILBOX_H_
#define _LINUX_ARMADA_37XX_RWTM_MAILBOX_H_
#include <linux/types.h>
struct armada_37xx_rwtm_tx_msg {
u16 command;
u32 args[16];
};
struct armada_37xx_rwtm_rx_msg {
u32 retval;
u32 status[16];
};
#endif /* _LINUX_ARMADA_37XX_RWTM_MAILBOX_H_ */