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authorMahesh Sivasubramanian <msivasub@codeaurora.org>2018-04-10 11:57:23 -0600
committerAndy Gross <andy.gross@linaro.org>2018-05-25 15:53:52 -0500
commit312416d9171a1460b7ed8d182b5b540c910ce80d (patch)
tree4c8d0c8e04bceb4a34af121b4c05a344321698a8 /include/soc/qcom
parenteddac5af06546d2e7a0730e3dc02dde3dc91098a (diff)
downloadlinux-312416d9171a1460b7ed8d182b5b540c910ce80d.tar.bz2
drivers: qcom: add command DB driver
Command DB is a simple database in the shared memory of QCOM SoCs, that provides information regarding shared resources. Some shared resources in the SoC have properties that are probed dynamically at boot by the remote processor. The information pertaining to the SoC and the platform are made available in the shared memory. Drivers can query this information using predefined strings. Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org> Signed-off-by: Lina Iyer <ilina@codeaurora.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Andy Gross <andy.gross@linaro.org>
Diffstat (limited to 'include/soc/qcom')
-rw-r--r--include/soc/qcom/cmd-db.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/include/soc/qcom/cmd-db.h b/include/soc/qcom/cmd-db.h
new file mode 100644
index 000000000000..578180cbc134
--- /dev/null
+++ b/include/soc/qcom/cmd-db.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. */
+
+#ifndef __QCOM_COMMAND_DB_H__
+#define __QCOM_COMMAND_DB_H__
+
+
+enum cmd_db_hw_type {
+ CMD_DB_HW_INVALID = 0,
+ CMD_DB_HW_MIN = 3,
+ CMD_DB_HW_ARC = CMD_DB_HW_MIN,
+ CMD_DB_HW_VRM = 4,
+ CMD_DB_HW_BCM = 5,
+ CMD_DB_HW_MAX = CMD_DB_HW_BCM,
+ CMD_DB_HW_ALL = 0xff,
+};
+
+#if IS_ENABLED(CONFIG_QCOM_COMMAND_DB)
+u32 cmd_db_read_addr(const char *resource_id);
+
+int cmd_db_read_aux_data(const char *resource_id, u8 *data, size_t len);
+
+size_t cmd_db_read_aux_data_len(const char *resource_id);
+
+enum cmd_db_hw_type cmd_db_read_slave_id(const char *resource_id);
+
+int cmd_db_ready(void);
+#else
+static inline u32 cmd_db_read_addr(const char *resource_id)
+{ return 0; }
+
+static inline int cmd_db_read_aux_data(const char *resource_id, u8 *data,
+ size_t len)
+{ return -ENODEV; }
+
+static inline size_t cmd_db_read_aux_data_len(const char *resource_id)
+{ return -ENODEV; }
+
+static inline enum cmd_db_hw_type cmd_db_read_slave_id(const char *resource_id)
+{ return -ENODEV; }
+
+static inline int cmd_db_ready(void)
+{ return -ENODEV; }
+#endif /* CONFIG_QCOM_COMMAND_DB */
+#endif /* __QCOM_COMMAND_DB_H__ */