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Thu, 20 Mar 2025 07:25:56 +0000 Message-ID: <5081fa69-32cb-4fd4-bad5-5f33032efc39@intel.com> Date: Thu, 20 Mar 2025 09:25:49 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] mmc: host: Wait for Vdd to settle on card power off To: Erick Shepherd , CC: , References: <20250314195021.1588090-1-erick.shepherd@ni.com> Content-Language: en-US From: Adrian Hunter Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki In-Reply-To: <20250314195021.1588090-1-erick.shepherd@ni.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: WA1P291CA0018.POLP291.PROD.OUTLOOK.COM (2603:10a6:1d0:19::25) To BYAPR11MB3605.namprd11.prod.outlook.com (2603:10b6:a03:f5::33) Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BYAPR11MB3605:EE_|DS7PR11MB6040:EE_ X-MS-Office365-Filtering-Correlation-Id: d343872e-c27b-47ee-96d3-08dd6780744e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|366016|7053199007; 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Increase wait to 15 ms so that voltage has time to drain down > to 0.5V and cards can power off correctly. Issues with voltage drain > time were only observed on Apollo Lake and Bay Trail host controllers > so this fix is limited to those devices. > > Signed-off-by: Erick Shepherd Can we leave a blank line after the block. It was that way before. With that, you can add: Acked-by: Adrian Hunter > --- > drivers/mmc/host/sdhci-pci-core.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c > index 1f0bd723f011..b1f7c11ea61e 100644 > --- a/drivers/mmc/host/sdhci-pci-core.c > +++ b/drivers/mmc/host/sdhci-pci-core.c > @@ -610,9 +610,12 @@ static void sdhci_intel_set_power(struct sdhci_host *host, unsigned char mode, > > sdhci_set_power(host, mode, vdd); > > - if (mode == MMC_POWER_OFF) > + if (mode == MMC_POWER_OFF) { > + if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_APL_SD || > + slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BYT_SD) > + usleep_range(15000, 17500); > return; > - > + } Blank line here > /* > * Bus power might not enable after D3 -> D0 transition due to the > * present state not yet having propagated. Retry for up to 2ms.