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Tue, 6 Oct 2026 14:42:52 +0200 Message-ID: <39d56818-922f-488e-842d-19a194654921@foss.st.com> Date: Tue, 6 Oct 2026 14:42:51 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 5/5] iio: adc: stm32-adc: Drop runtime_idle() To: Brian Norris , "Rafael J. Wysocki" CC: , , Andy Shevchenko , Alexandre Torgue , =?UTF-8?Q?Nuno_S=C3=A1?= , , Jonathan Cameron , David Lechner , Maxime Coquelin , , Fabrice Gasnier , References: <20261002230714.507921-1-briannorris@chromium.org> <20261002160309.5.Ica1e32ae51d7975844386684d2b6a097f3ca9122@changeid> Content-Language: en-US From: Fabrice Gasnier In-Reply-To: <20261002160309.5.Ica1e32ae51d7975844386684d2b6a097f3ca9122@changeid> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.252.27.219] X-ClientProxiedBy: STKCAS1NODE1.st.com (10.75.128.134) To STKDAG1NODE2.st.com (10.75.128.133) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: ZR1PEPF0000E6BC:EE_|GV4PR10MB002783:EE_ X-MS-Office365-Filtering-Correlation-Id: 14bae2b7-1ba4-44af-ae8e-08df23a75a46 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|36860700016|82310400026|376014|7416014|1800799024|11063799006|56012099006|4143699003|10067099003|22082099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:164.130.1.60;CTRY:IT;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:smtpO365.st.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(23010399003)(36860700016)(82310400026)(376014)(7416014)(1800799024)(11063799006)(56012099006)(4143699003)(10067099003)(22082099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: FWLOLvhxvEutvQBvRi2QcPrejuqfkQOZEVv4sONd1dFqN3js++QcL75Mj+s0y6GRduTMeDgLQKZw0EpQ1rSQkMfjuxv8Wq6xatU9b4P5IcQ7jMtopOp/RSg2RBbmKLDbiduoWDkgALARpYXS9rIKRYL1Y7yK74R2kq0fYUbL+CrTxts8kJ65HozyiZx7s8Bx6Eu0HPfp9jwzmG51bWadsGYLbKs2175b0dtKYPKG2xbAOuevNPs/JA9EjC1dLlhVPrHrT87PZjxmazWVk2jThK0EEoeGSiK0mTXLF8Dfl+O8cAK495A5ayM1t/OskpSXbhSMQFG229MYiR6YPOKmQdjYZOx8rflZNsQxtLzmZJsmWaZB+x6IVUdWinMNTtNw3xoUIneUu4jIdTLZzk1ugj1/QqJfufcjqTajmZwx8ONkXozLcMijuFZCLnJztMQz X-OriginatorOrg: foss.st.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Oct 2026 12:42:59.0257 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 14bae2b7-1ba4-44af-ae8e-08df23a75a46 X-MS-Exchange-CrossTenant-Id: 75e027c9-20d5-47d5-b82f-77d7cd041e8f X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=75e027c9-20d5-47d5-b82f-77d7cd041e8f;Ip=[164.130.1.60];Helo=[smtpO365.st.com] X-MS-Exchange-CrossTenant-AuthSource: ZR1PEPF0000E6BC.eurprd07.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: GV4PR10MB002783 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261006_054306_513944_DD300B80 X-CRM114-Status: GOOD ( 16.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 10/3/26 01:03, Brian Norris wrote: > This runtime_idle() implementation was added in commit c537d3457542 ("iio: > adc: stm32-adc: fix runtime autosuspend delay when slow polling"), to work > around a suboptimal behavior in the runtime PM core. It should no longer > be necessary as of "PM: runtime: Propagate last_busy from dependent to > dependency". > > Cc: Jonathan Cameron > Cc: Fabrice Gasnier > Cc: Ulf Hansson > Signed-off-by: Brian Norris > --- > I do not have these devices to test. I have tested other drivers, and I've > verified this behavior in unit tests as well. Hi Brian, I've been able to reproduce on stm32 earlier behavior by applying this patch only. With the full series, so far, everything seems fine from my point of view. I haven't deeply inspected all the series, at least for the stm32-adc driver, you can add my: Tested-by: Fabrice Gasnier Thanks, Best Regards, Fabrice > > drivers/iio/adc/stm32-adc-core.c | 9 +-------- > 1 file changed, 1 insertion(+), 8 deletions(-) > > diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c > index a42d82d61cb8..e9e113a46ccf 100644 > --- a/drivers/iio/adc/stm32-adc-core.c > +++ b/drivers/iio/adc/stm32-adc-core.c > @@ -836,17 +836,10 @@ static int stm32_adc_core_runtime_resume(struct device *dev) > return stm32_adc_core_hw_start(dev); > } > > -static int stm32_adc_core_runtime_idle(struct device *dev) > -{ > - pm_runtime_mark_last_busy(dev); > - > - return 0; > -} > - > static DEFINE_RUNTIME_DEV_PM_OPS(stm32_adc_core_pm_ops, > stm32_adc_core_runtime_suspend, > stm32_adc_core_runtime_resume, > - stm32_adc_core_runtime_idle); > + NULL); > > static const struct stm32_adc_priv_cfg stm32f4_adc_priv_cfg = { > .regs = &stm32f4_adc_common_regs,