diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/mach-bcm283x/Makefile | 2 | ||||
-rw-r--r-- | arch/arm/mach-bcm283x/include/mach/msg.h | 18 | ||||
-rw-r--r-- | arch/arm/mach-bcm283x/msg.c | 39 |
3 files changed, 58 insertions, 1 deletions
diff --git a/arch/arm/mach-bcm283x/Makefile b/arch/arm/mach-bcm283x/Makefile index 5cb1b2f..b5f606e 100644 --- a/arch/arm/mach-bcm283x/Makefile +++ b/arch/arm/mach-bcm283x/Makefile @@ -5,4 +5,4 @@ # obj-$(CONFIG_BCM2835) += lowlevel_init.o -obj-y += init.o reset.o mbox.o phys2bus.o +obj-y += init.o reset.o mbox.o msg.o phys2bus.o diff --git a/arch/arm/mach-bcm283x/include/mach/msg.h b/arch/arm/mach-bcm283x/include/mach/msg.h new file mode 100644 index 0000000..3bcb5db --- /dev/null +++ b/arch/arm/mach-bcm283x/include/mach/msg.h @@ -0,0 +1,18 @@ +/* + * (C) Copyright 2012,2015 Stephen Warren + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _BCM2835_MSG_H +#define _BCM2835_MSG_H + +/** + * bcm2835_power_on_module() - power on an SoC module + * + * @module: ID of module to power on (BCM2835_MBOX_POWER_DEVID_...) + * @return 0 if OK, -EIO on error + */ +int bcm2835_power_on_module(u32 module); + +#endif diff --git a/arch/arm/mach-bcm283x/msg.c b/arch/arm/mach-bcm283x/msg.c new file mode 100644 index 0000000..08b1bea --- /dev/null +++ b/arch/arm/mach-bcm283x/msg.c @@ -0,0 +1,39 @@ +/* + * (C) Copyright 2012 Stephen Warren + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <memalign.h> +#include <asm/arch/mbox.h> + +struct msg_set_power_state { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_set_power_state set_power_state; + u32 end_tag; +}; + +int bcm2835_power_on_module(u32 module) +{ + ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); + int ret; + + BCM2835_MBOX_INIT_HDR(msg_pwr); + BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, + SET_POWER_STATE); + msg_pwr->set_power_state.body.req.device_id = module; + msg_pwr->set_power_state.body.req.state = + BCM2835_MBOX_SET_POWER_STATE_REQ_ON | + BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; + + ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, + &msg_pwr->hdr); + if (ret) { + printf("bcm2835: Could not set module %u power state\n", + module); + return -EIO; + } + + return 0; +} |