diff options
| author | Liviu Dudau <Liviu.Dudau@arm.com> | 2014-02-20 12:54:48 +0000 |
|---|---|---|
| committer | Jon Medhurst <tixy@linaro.org> | 2014-04-09 18:55:11 +0100 |
| commit | bab9b19bafe00a0022b9f2dd0a615cbb111aeca6 (patch) | |
| tree | 62071de2f717f3a03ce9528ddb588942e721c763 /include/linux | |
| parent | 5bc83dcd789a064f9b0d902796a6cb77e0fa7a45 (diff) | |
misc: Add support for communication with System Control and Power unit via MHU.
Modern ARM systems contain a System Control and Power unit that allows
for control of compute cores and clusters, oscillator setup, wakeup
timers and even system reset. This driver adds support for communication
with the SCP via the Message Handling Unit hardware.
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/scpi.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/scpi.h b/include/linux/scpi.h new file mode 100644 index 00000000000..adf2df09b37 --- /dev/null +++ b/include/linux/scpi.h @@ -0,0 +1,22 @@ +#ifndef __ARM_SCPI_H +#define __ARM_SCPI_H + +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/workqueue.h> + +#define SCPI_MHU_CHANNEL_MAX 2 + +#define SCPI_CMD_INVALID 0x00 +#define SCPI_CMD_SCP_READY 0x01 +#define SCPI_CMD_SCP_CAPABILITIES 0x02 +#define SCPI_CMD_FAULT 0x03 +#define SCPI_CMD_GET_CLOCKS 0x13 +#define SCPI_CMD_SET_CLOCK_FREQ_INDEX 0x14 +#define SCPI_CMD_SET_CLOCK_FREQ 0x15 +#define SCPI_CMD_GET_CLOCK_FREQ 0x16 + +int scpi_exec_command(uint8_t cmd, void *payload, int size, + void *reply_payload, int rsize); + +#endif /* __ARM_SCPI_H */ |