1 /* SPDX-License-Identifier: GPL-2.0-only */
3 #ifndef __PSP_PLATFORM_ACCESS_H
4 #define __PSP_PLATFORM_ACCESS_H
8 enum psp_platform_access_msg {
10 PSP_I2C_REQ_BUS_CMD = 0x64,
13 struct psp_req_buffer_hdr {
19 struct psp_req_buffer_hdr header;
24 * psp_send_platform_access_msg() - Send a message to control platform features
26 * This function is intended to be used by drivers outside of ccp to communicate
31 * -%EBUSY: mailbox in recovery or in use
32 * -%ENODEV: driver not bound with PSP device
33 * -%ETIMEDOUT: request timed out
34 * -%EIO: unknown error (see kernel log)
36 int psp_send_platform_access_msg(enum psp_platform_access_msg, struct psp_request *req);
39 * psp_ring_platform_doorbell() - Ring platform doorbell
41 * This function is intended to be used by drivers outside of ccp to ring the
42 * platform doorbell with a message.
46 * -%EBUSY: mailbox in recovery or in use
47 * -%ENODEV: driver not bound with PSP device
48 * -%ETIMEDOUT: request timed out
49 * -%EIO: error will be stored in result argument
51 int psp_ring_platform_doorbell(int msg, u32 *result);
54 * psp_check_platform_access_status() - Checks whether platform features is ready
56 * This function is intended to be used by drivers outside of ccp to determine
57 * if platform features has initialized.
60 * 0 platform features is ready
61 * -%ENODEV platform features is not ready or present
63 int psp_check_platform_access_status(void);
65 #endif /* __PSP_PLATFORM_ACCESS_H */