From cdd5de500b2c90d5181ebc963826019a0a4234ba Mon Sep 17 00:00:00 2001 From: Dave Gerlach Date: Tue, 22 Sep 2015 19:14:54 -0500 Subject: soc: ti: Add wkup_m3_ipc driver Introduce a wkup_m3_ipc driver to handle communication between the MPU and Cortex M3 wkup_m3 present on am335x. This driver is responsible for actually booting the wkup_m3_rproc and also handling all IPC which is done using the IPC registers in the control module, a mailbox, and a separate interrupt back from the wkup_m3. A small API is exposed for executing specific power commands, which include configuring for low power mode, request a transition to a low power mode, and status info on a previous transition. Signed-off-by: Dave Gerlach Signed-off-by: Tony Lindgren --- include/linux/wkup_m3_ipc.h | 55 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 include/linux/wkup_m3_ipc.h (limited to 'include/linux/wkup_m3_ipc.h') diff --git a/include/linux/wkup_m3_ipc.h b/include/linux/wkup_m3_ipc.h new file mode 100644 index 000000000000..d6ba7d39a62f --- /dev/null +++ b/include/linux/wkup_m3_ipc.h @@ -0,0 +1,55 @@ +/* + * TI Wakeup M3 for AMx3 SoCs Power Management Routines + * + * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ + * Dave Gerlach + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _LINUX_WKUP_M3_IPC_H +#define _LINUX_WKUP_M3_IPC_H + +#define WKUP_M3_DEEPSLEEP 1 +#define WKUP_M3_STANDBY 2 +#define WKUP_M3_IDLE 3 + +#include + +struct wkup_m3_ipc_ops; + +struct wkup_m3_ipc { + struct rproc *rproc; + + void __iomem *ipc_mem_base; + struct device *dev; + + int mem_type; + unsigned long resume_addr; + int state; + + struct completion sync_complete; + struct mbox_client mbox_client; + struct mbox_chan *mbox; + + struct wkup_m3_ipc_ops *ops; +}; + +struct wkup_m3_ipc_ops { + void (*set_mem_type)(struct wkup_m3_ipc *m3_ipc, int mem_type); + void (*set_resume_address)(struct wkup_m3_ipc *m3_ipc, void *addr); + int (*prepare_low_power)(struct wkup_m3_ipc *m3_ipc, int state); + int (*finish_low_power)(struct wkup_m3_ipc *m3_ipc); + int (*request_pm_status)(struct wkup_m3_ipc *m3_ipc); +}; + +struct wkup_m3_ipc *wkup_m3_ipc_get(void); +void wkup_m3_ipc_put(struct wkup_m3_ipc *m3_ipc); +#endif /* _LINUX_WKUP_M3_IPC_H */ -- cgit v1.2.3-59-g8ed1b