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

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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 <xiaopeng.bai@unisoc.com>
Change-Id: I9a6651f07a048ffebd5c2d8e369a4e7b374bc182
(cherry picked from commit 53e342c183)
This commit is contained in:
Xiaopeng Bai
2022-04-14 16:22:43 +08:00
committed by Treehugger Robot
parent 7c2b6c7b56
commit 8726a2d930
3 changed files with 28 additions and 0 deletions
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2
drivers/android/vendor_hooks.c
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@@ -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);

2
drivers/mfd/syscon.c
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@@ -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;

24
include/trace/hooks/regmap.h Normal file
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@@ -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>