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Tue, 6 Jan 2026 06:08:31 -0800 From: "Sheetal ." To: Mark Brown CC: Sander Vanheule , Greg Kroah-Hartman , "Rafael J . Wysocki" , Danilo Krummrich , Liam Girdwood , Jaroslav Kysela , Takashi Iwai , "Thierry Reding" , Jonathan Hunter , , , , Sheetal Subject: [RFC PATCH 0/2] regmap: Add cache_default_is_zero flag for flat cache Date: Tue, 6 Jan 2026 19:38:25 +0530 Message-ID: <20260106140827.3771375-1-sheetal@nvidia.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF00026369:EE_|SA3PR12MB8047:EE_ X-MS-Office365-Filtering-Correlation-Id: 26e743ea-a298-4b76-3e24-08de4d2d1e72 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|36860700013|1800799024|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?S4VVwf0gDomGznLY5s0xbpTzg9o5O+0DXVRHvYm8lk1SfPNmDLI6l5FFeAnG?= =?us-ascii?Q?uEzt6KI8ZjXl0Yu8Rir3CENZ1L6cWKWdJT6bn4TCqC6NW4be3cSZ4wvweXXN?= =?us-ascii?Q?qtWlKr1W2X+qTN4mcAIRqNhu2G97pLnSQvYfZuZHfyVrGnYHA8Pl2bf5IEpf?= =?us-ascii?Q?bB2n8Te5RhPc7hksNNoevHrJvcAvvtsuBEn0CYGOOP1R0B43L0qfsqA9riJ5?= =?us-ascii?Q?rskGYVyFQ1C6Qb7ZH6Ia/j6gtrya7tUUt5QHvaTMnBsVS4WgD/5oeW8RJ0Z5?= =?us-ascii?Q?fqGphmNvxTfnBYNvMXtvOQ+ACAPsZV0xdScrjwqDGp0BN+QgRV0vfhTxGZCM?= =?us-ascii?Q?+//nImUhwubVvy6I+BvtJqZE1YTUX68xstpjfgaIcNh32S4gMs2X0ruekqW8?= =?us-ascii?Q?m7V87vVJaVuxbgwrnzy22jPObXgDqa0TjUHs0gCZZJaxEsdb6OBKwfWpCc8y?= =?us-ascii?Q?zxCieq2d7L34+zQx3CgN2EVnqu0FIc1VtAMdMrlyP3r4HCX5vfHZgzSIP52A?= =?us-ascii?Q?ZOh5sHJQf83YQSIlJzC5Fe/q2CpkmcNG9SHtp5qGbjQB5nLCqnVp94z4btpo?= =?us-ascii?Q?pY06++/Ei7BBhjQTldZ9lRowXGo3h6YteIMTTOu2xwEO0WUbThwklY6GpQZd?= =?us-ascii?Q?kuoGfHcKrgMOfmA4opAn9AkQceLuIuG1zM0hLOoisD4bmKIwjrzT1cvDAZIW?= =?us-ascii?Q?A4IX7fXcjU9Cmq4zIO60Y57KWa4dGjX7B9QuBfxMYGXRfBC/S0WF5WEBpiHa?= =?us-ascii?Q?S38FclnNTDxhNktzSUsYTvf4NGgviRV7oWMELeWflJIjkuokY8JfuXmbcUJ4?= =?us-ascii?Q?yfoTOKCGijr2LShmJwpnBfIvDWTAnKV7ST0h5Bjj3SQvpBvvVnJOjCPhaKGf?= =?us-ascii?Q?JqgpF6QBM2rRNy6lmSB+254oz1l31cGEH6cJikkZKDTmvgHp3uitYwrQiPg6?= =?us-ascii?Q?WoRX0hqCMRw+Ja+0NroBdPNX1fyETsNJkDnFTkwksVkCP8arg4G/B/qgjsf7?= =?us-ascii?Q?MCOJotCMpBKGrchWySrlitfe6YYG+pRhdXHOOjpAuQiSrejbfVehubzlUWQ9?= =?us-ascii?Q?bWE+Q/Sj1UUfGfHyWEubCTWcGxu00jAfOD4XeCWO8SBs1/WPlv48YMNXPyIE?= =?us-ascii?Q?yHAuV4iALaXhftocE4egt5doOxUyWLiTzMI7qAnbKPAMzz1jaiiUoWD3B7ug?= =?us-ascii?Q?kozMEhUj9RLf9q9AR8WkIpkzIO1WGtlQQJuVOS516tBOilTzeGHAKyFXhzw5?= =?us-ascii?Q?BT/ra3qIIJCYys7E1x4AWG8308y6/Dt96gJPq1I1EIqJZO7E+Jjv4oAAVqWp?= =?us-ascii?Q?H7AaAiXt0Ody75zfXWo/gcQISOT2CyfL58ALfI30CNx4J7RKb6wIQYR1jYy8?= =?us-ascii?Q?4lcmYnCkjSa4zPdKbA0XL0tfdJggzYRf9AjOpwBETxpQLHCn3tNMrEoahQPX?= =?us-ascii?Q?p100hMqAgyQsgGeHStKepjNgYbabmT5S7MRQdHZ83rYm6wdp4bTc0XUs5pZ5?= =?us-ascii?Q?pwQhgoBP8cIt9i65hZyrHgfOF+u8wUzHHfbYBkmS4VC3NNbWJHukWzZ1VQ5Z?= =?us-ascii?Q?IJwZLy1HfxK3E4bYnwc=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(7416014)(36860700013)(1800799024)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jan 2026 14:08:51.0255 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 26e743ea-a298-4b76-3e24-08de4d2d1e72 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF00026369.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB8047 From: Sheetal This patch series adds a cache_default_is_zero flag for REGCACHE_FLAT that marks cache entries as valid on first read. For hardware with zero power-on-reset registers, this avoids the need to add all such registers to reg_defaults (maintenance burden, code bloat, no functional benefit) just to set the validity bits. Sheetal (2): regmap: Add cache_default_is_zero flag for flat cache ASoC: tegra: Enable cache_default_is_zero for audio drivers drivers/base/regmap/internal.h | 2 ++ drivers/base/regmap/regcache-flat.c | 11 +++++++---- drivers/base/regmap/regcache.c | 1 + include/linux/regmap.h | 3 +++ sound/soc/tegra/tegra186_asrc.c | 1 + sound/soc/tegra/tegra186_dspk.c | 1 + sound/soc/tegra/tegra210_admaif.c | 3 +++ sound/soc/tegra/tegra210_adx.c | 2 ++ sound/soc/tegra/tegra210_ahub.c | 3 +++ sound/soc/tegra/tegra210_amx.c | 3 +++ sound/soc/tegra/tegra210_dmic.c | 1 + sound/soc/tegra/tegra210_i2s.c | 2 ++ sound/soc/tegra/tegra210_mbdrc.c | 1 + sound/soc/tegra/tegra210_mixer.c | 1 + sound/soc/tegra/tegra210_mvc.c | 1 + sound/soc/tegra/tegra210_ope.c | 1 + sound/soc/tegra/tegra210_peq.c | 1 + sound/soc/tegra/tegra210_sfc.c | 1 + 18 files changed, 35 insertions(+), 4 deletions(-) -- 2.17.1