armbian/linux-rockchip
0
0
Fork 0
mirror of https://github.com/armbian/linux-rockchip.git synced 2026-01-06 11:08:10 -08:00
Code Issues Packages Projects Releases Wiki Activity

soc: ti: Add wkup_m3_ipc driver

Browse Source 
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 <d-gerlach@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Dave Gerlach
2015-09-22 19:14:54 -05:00
committed by Tony Lindgren
parent fe9b867d24
commit cdd5de500b
4 changed files with 574 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/soc/ti/Kconfig
View File

@@ -28,4 +28,14 @@ config KEYSTONE_NAVIGATOR_DMA
If unsure, say N.
config WKUP_M3_IPC
tristate "TI AMx3 Wkup-M3 IPC Driver"
depends on WKUP_M3_RPROC
depends on OMAP2PLUS_MBOX
help
TI AM33XX and AM43XX have a Cortex M3, the Wakeup M3, to handle
low power transitions. This IPC driver provides the necessary API
to communicate and use the Wakeup M3 for PM features like suspend
resume and boots it using wkup_m3_rproc driver.
endif # SOC_TI

1
drivers/soc/ti/Makefile
View File

@@ -4,3 +4,4 @@
obj-$(CONFIG_KEYSTONE_NAVIGATOR_QMSS) += knav_qmss.o
knav_qmss-y := knav_qmss_queue.o knav_qmss_acc.o
obj-$(CONFIG_KEYSTONE_NAVIGATOR_DMA) += knav_dma.o
obj-$(CONFIG_WKUP_M3_IPC) += wkup_m3_ipc.o

508
drivers/soc/ti/wkup_m3_ipc.c Normal file
View File

File diff suppressed because it is too large Load Diff

55
include/linux/wkup_m3_ipc.h Normal file
View File

@@ -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 <d-gerlach@ti.com>
*
* 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 <linux/mailbox_client.h>
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 */