1 files changed, 78 insertions, 0 deletions

diff --git a/include/linux/scpi_protocol.h b/include/linux/scpi_protocol.h
new file mode 100644
index 000000000000..80af3cd35ae4
--- /dev/null
+++ b/include/linux/scpi_protocol.h
@@ -0,0 +1,78 @@
+/*
+ * 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;
+};
+
+enum scpi_sensor_class {
+        TEMPERATURE,
+        VOLTAGE,
+        CURRENT,
+        POWER,
+};
+
+struct scpi_sensor_info {
+        u16 sensor_id;
+        u8 class;
+        u8 trigger_type;
+        char name[20];
+} __packed;
+
+/**
+ * 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);
+        int (*sensor_get_capability)(u16 *sensors);
+        int (*sensor_get_info)(u16 sensor_id, struct scpi_sensor_info *);
+        int (*sensor_get_value)(u16, u32 *);
+};
+
+#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