From:   Quan Nguyen <quan@os.amperecomputing.com>
To:     Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>,
        Jean Delvare <jdelvare@suse.com>,
        Guenter Roeck <linux@roeck-us.net>,
        Rob Herring <robh+dt@kernel.org>,
        Lee Jones <lee.jones@linaro.org>,
        Jonathan Corbet <corbet@lwn.net>, linux-hwmon@vger.kernel.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-doc@vger.kernel.org, linux-aspeed@lists.ozlabs.org,
        openbmc@lists.ozlabs.org, Mark Brown <broonie@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Derek Kiernan <derek.kiernan@xilinx.com>,
        Dragan Cvetic <dragan.cvetic@xilinx.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Cc:     Open Source Submission <patches@amperecomputing.com>,
        Phong Vo <phong@os.amperecomputing.com>,
        "Thang Q . Nguyen" <thang@os.amperecomputing.com>,
        Quan Nguyen <quan@os.amperecomputing.com>
Subject: [PATCH v6 5/9] regmap: Introduces regmap lock helpers
Date:   Fri, 24 Dec 2021 11:13:48 +0700
Message-Id: <20211224041352.29405-6-quan@os.amperecomputing.com>
In-Reply-To: <20211224041352.29405-1-quan@os.amperecomputing.com>
References: <20211224041352.29405-1-quan@os.amperecomputing.com>
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?5prVHqeWQwOlYA4qG3YV7qVjM19x4bYHLTbbjiFNPqHAz9u97cf9KTzyYTaz?=
 =?us-ascii?Q?rLvYjddDQrK+CQ7kESxaR2KZyXtSiQzJtjdnn02NVW+PBw9NSk2PoGWdw8sG?=
 =?us-ascii?Q?OAgCnDwVnmxpLYJG1ReqsY2huZcjxnsP5WIIxN0hxRnMPmJBWHi3PtPoH5Mm?=
 =?us-ascii?Q?Gm69UutJSdArec1gXwxw/PKcls5azYamgLmoox3MwKMfaAe9P13ro6slAS37?=
 =?us-ascii?Q?gGBzW+kuvgC8O5v3qwRFBraqWmTJF2vgiNsiLkAEOp+GypSqeHZP+pv0BNGU?=
 =?us-ascii?Q?PGkn1228+bJeEE1PV5qDbyti17VHNJsPuLtwCUkw4F+vGLl6NKC6oxlikU+3?=
 =?us-ascii?Q?9mM1aSmjQoUceM92rdOkTKURmFK0Ix+4DV9ovwUyUy0fBjG2PCUvkesV4gn9?=
 =?us-ascii?Q?YapFOjvTDjZSQFzaGDW/oN0XO4OuR0DFQqPpZ+Rl91BYNZPWNjMxXmjtnJU3?=
 =?us-ascii?Q?But5W1ewfnzGrdyftAYhi1iNU/GQHIsn5nQlEmkMOOTareVzsCPYJuFESgsO?=
 =?us-ascii?Q?O5G7K4JdW39MUg0/z7142/f2YPYJE8VP2+4OE7Jner1tFDcjFWUVfzUe9vnE?=
 =?us-ascii?Q?eUVtLhczXJJ5rovJ5JZkNPpru2THbJhcDa/I+cDJJY8/c0kx1XlZ+EqnZ610?=
 =?us-ascii?Q?s2I4S5xlPfYN8FfClxmEHtSGDPRdIVEronuOBmNkBof0D/Z46bIkvn3f/NV7?=
 =?us-ascii?Q?/52uuW5SP8twaNPBXbCsfTGZ1d20PeDTuHZw/7ETsiyFAU6PoMaUtTPC7VSW?=
 =?us-ascii?Q?S46uz/yEITPCii6+nknDtNtdeG/Nip9U1bTKF4uIJMT6kYEgp/JmvNCoplCc?=
 =?us-ascii?Q?Bqb8nzyHkHPQcrb6mSWRuQF0UdNfVgj5E8wCWNZMSatkcxmwFRMoxnY4vYxr?=
 =?us-ascii?Q?vc5UbztXY1RMRD14Zrqb5YhzTKTdCz0zlM9ox3WaHFIiqcEBDdsAi7j37cpY?=
 =?us-ascii?Q?jrvYUfNkdrbhsM5nPvafa2J/IBM0alq9wnym5dD1rL9iHUbaafZClTby+4cl?=
 =?us-ascii?Q?h00/C3sugiDsbWU48+ln6GJNrxZFY6Hi5EI8Z2Xonj9r3aLTXKCImqeOdHsQ?=
 =?us-ascii?Q?rLtOLwGSGE3Uk5z3vmdU+F59obZvRD1vgwTqQMOiAZrRcfI6JKT+SH6aKVL8?=
 =?us-ascii?Q?fPqVec6jzaCsFZlTUrOOLP7KIF/GroBW2I6BW6Bln2vr13KGPVbhBFUoFqfm?=
 =?us-ascii?Q?R1UGW02WmEHI2562/47aOaORRBfleP7MQlFMWa+B5jg6tIsFud6RuPOOOJJg?=
 =?us-ascii?Q?IvUR5eveLTrkyvP91Mus+eHUO0K/FWGNjrATyprs/bpN4292RWp1F3SBeuoG?=
 =?us-ascii?Q?N6fIO0TTSbtt2Dqd0x+E7qJg2thgykgQDklpzjlM2cew5rq2vXIX70ImtJ0I?=
 =?us-ascii?Q?gLVNgWQHkx9dSAPYPifdPoOLF8hq0ZBhz4HMcu1cq6+3SVkq9qjHOtcZzLtE?=
 =?us-ascii?Q?seDqgoPfilGolm+KiLcyHjb/ouivq5OHLchWnO4WTR8ayyxrt+2cdFp5xQ4H?=
 =?us-ascii?Q?M1VGDEz1AGvp/5dw7Gy8nEPt8jb3JtzMYqDO4RhPjh0dGI6Xjx5jBI8CAYcs?=
 =?us-ascii?Q?5i7kYqPQXTpgaIfJ6MZQMqXRbBDHOw3dG7+7MTozcmcYaCPbGzpfDW9DOPp/?=
 =?us-ascii?Q?EliDFAiimGgP1Kb7hCF6/haWsMkH4xmlQUbOy0DkgF1LFXS4DCjpVU1jHDSn?=
 =?us-ascii?Q?5VuVAlTBDwqkcZgc2lUWwESMRCg=3D?=
X-OriginatorOrg: os.amperecomputing.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 5ae92ab6-25d7-4939-4bbe-08d9c693fdfe
X-MS-Exchange-CrossTenant-AuthSource: SJ0PR01MB7282.prod.exchangelabs.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Dec 2021 04:15:17.6579
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 3bc2b170-fd94-476d-b0ce-4229bdc904a7
X-MS-Exchange-CrossTenant-MailboxType: HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName: 08mA/gR6HXPFlYnkzbBCCH6JdgE4RiSL0biWXEMdMHEqaxg9vyYj/23RDCR6yq+esJj4Y2Z3WyfpF514YiVZ8OywBl8UZYrRAZQdoL7fot4=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR01MB5189
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

This commit introduces regmap_acquire/release_lock() functions and makes
them available for drivers that need atomic access of regmap registers

Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com>
---
Change in v6:
  + First introduced in v6 [Quan]

 drivers/base/regmap/regmap.c | 12 ++++++++++++
 include/linux/regmap.h       |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 2d74f9f82aa9..36921309725b 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -87,6 +87,18 @@ bool regmap_check_range_table(struct regmap *map, unsigned int reg,
 }
 EXPORT_SYMBOL_GPL(regmap_check_range_table);
 
+void regmap_acquire_lock(struct regmap *map)
+{
+	map->lock(map->lock_arg);
+}
+EXPORT_SYMBOL_GPL(regmap_acquire_lock);
+
+void regmap_release_lock(struct regmap *map)
+{
+	map->unlock(map->lock_arg);
+}
+EXPORT_SYMBOL_GPL(regmap_release_lock);
+
 bool regmap_writeable(struct regmap *map, unsigned int reg)
 {
 	if (map->max_register && reg > map->max_register)
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 22652e5fbc38..0ed12e6ad4fb 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -1194,6 +1194,8 @@ int regmap_async_complete(struct regmap *map);
 bool regmap_can_raw_write(struct regmap *map);
 size_t regmap_get_raw_read_max(struct regmap *map);
 size_t regmap_get_raw_write_max(struct regmap *map);
+void regmap_acquire_lock(struct regmap *map);
+void regmap_release_lock(struct regmap *map);
 
 int regcache_sync(struct regmap *map);
 int regcache_sync_region(struct regmap *map, unsigned int min,
-- 
2.28.0