ANDROID: GKI: regmap: Add regmap vendor hook for of_syscon_register

For global registers access, UNISOC have one special method called set/clear mechanism that would avoid using hardware spinlock. But now regmap framework does not support our set/clear mechanism, so add vendor hook to support this feature. Bug: 228907258 Signed-off-by: Xiaopeng Bai <[email protected]> Change-Id: I9a6651f07a048ffebd5c2d8e369a4e7b374bc182 (cherry picked from commit 53e342c183af58f03bd1445838a3f499e7fbd191)
OnePlusOSS · Jul 13, 2023 · 8726a2d · 8726a2d
1 parent 7c2b6c7
commit 8726a2d
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diff --git a/drivers/android/vendor_hooks.c b/drivers/android/vendor_hooks.c
@@ -66,6 +66,7 @@
 #include <trace/hooks/psci.h>
 #include <trace/hooks/psi.h>
 #include <trace/hooks/bl_hib.h>
+#include <trace/hooks/regmap.h>
 
 /*
  * Export tracepoints that act as a bare tracehook (ie: have no trace event
@@ -310,3 +311,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_post_image_save);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_madvise_cold_pageout_skip);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rmqueue_smallest_bypass);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_free_one_page_bypass);
+EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_regmap_update);
diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
@@ -22,6 +22,7 @@
 #include <linux/regmap.h>
 #include <linux/mfd/syscon.h>
 #include <linux/slab.h>
+#include <trace/hooks/regmap.h>
 
 static struct platform_driver syscon_driver;
 
@@ -128,6 +129,7 @@ static struct syscon *of_syscon_register(struct device_node *np, bool check_clk)
 		}
 	}
 
+	trace_android_vh_regmap_update(&syscon_config, regmap);
 	syscon->regmap = regmap;
 	syscon->np = np;
 

diff --git a/include/trace/hooks/regmap.h b/include/trace/hooks/regmap.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM regmap
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH trace/hooks
+
+#if !defined(_TRACE_HOOK_REGMAP_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_HOOK_REGMAP_H
+#include <trace/hooks/vendor_hooks.h>
+
+struct regmap_config;
+struct regmap;
+
+/*
+ * Following tracepoints are not exported in tracefs and provide a
+ * mechanism for vendor modules to hook and extend functionality
+ */
+DECLARE_HOOK(android_vh_regmap_update,
+	TP_PROTO(const struct regmap_config *config, struct regmap *map),
+	TP_ARGS(config, map));
+
+#endif /* _TRACE_HOOK_REGMAP_H */
+/* This part must be outside protection */
+#include <trace/define_trace.h>