These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / include / linux / scpi_protocol.h

diff --git a/kernel/include/linux/scpi_protocol.h b/kernel/include/linux/scpi_protocol.h
new file mode 100644 (file)
index 0000000..72ce932
--- /dev/null
+++ b/kernel/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_REACHABLE(CONFIG_ARM_SCPI_PROTOCOL)
+struct scpi_ops *get_scpi_ops(void);
+#else
+static inline struct scpi_ops *get_scpi_ops(void) { return NULL; }
+#endif