mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 13:13:57 +08:00
62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
|
/*
|
||
|
|
* SCPI Message Protocol driver header
|
||
|
|
*
|
||
|
|
* Copyright (C) 2014 ARM Ltd.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms and conditions of the GNU General Public License,
|
||
|
|
* version 2, as published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||
|
|
* more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License along with
|
||
|
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
#include <linux/types.h>
|
||
|
|
|
||
|
|
struct scpi_opp {
|
||
|
|
u32 freq;
|
||
|
|
u32 m_volt;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
struct scpi_dvfs_info {
|
||
|
|
unsigned int count;
|
||
|
|
unsigned int latency; /* in nanoseconds */
|
||
|
|
struct scpi_opp *opps;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct scpi_ops - represents the various operations provided
|
||
|
|
* by SCP through SCPI message protocol
|
||
|
|
* @get_version: returns the major and minor revision on the SCPI
|
||
|
|
* message protocol
|
||
|
|
* @clk_get_range: gets clock range limit(min - max in Hz)
|
||
|
|
* @clk_get_val: gets clock value(in Hz)
|
||
|
|
* @clk_set_val: sets the clock value, setting to 0 will disable the
|
||
|
|
* clock (if supported)
|
||
|
|
* @dvfs_get_idx: gets the Operating Point of the given power domain.
|
||
|
|
* OPP is an index to the list return by @dvfs_get_info
|
||
|
|
* @dvfs_set_idx: sets the Operating Point of the given power domain.
|
||
|
|
* OPP is an index to the list return by @dvfs_get_info
|
||
|
|
* @dvfs_get_info: returns the DVFS capabilities of the given power
|
||
|
|
* domain. It includes the OPP list and the latency information
|
||
|
|
*/
|
||
|
|
struct scpi_ops {
|
||
|
|
u32 (*get_version)(void);
|
||
|
|
int (*clk_get_range)(u16, unsigned long *, unsigned long *);
|
||
|
|
unsigned long (*clk_get_val)(u16);
|
||
|
|
int (*clk_set_val)(u16, unsigned long);
|
||
|
|
int (*dvfs_get_idx)(u8);
|
||
|
|
int (*dvfs_set_idx)(u8, u8);
|
||
|
|
struct scpi_dvfs_info *(*dvfs_get_info)(u8);
|
||
|
|
};
|
||
|
|
|
||
|
|
#if IS_ENABLED(CONFIG_ARM_SCPI_PROTOCOL)
|
||
|
|
struct scpi_ops *get_scpi_ops(void);
|
||
|
|
#else
|
||
|
|
static inline struct scpi_ops *get_scpi_ops(void) { return NULL; }
|
||
|
|
#endif
|