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Fri, 28 Jun 2024 12:57:56 +0000 Received: from SJ0PR03MB6343.namprd03.prod.outlook.com ([fe80::6744:a83a:ab:7e23]) by SJ0PR03MB6343.namprd03.prod.outlook.com ([fe80::6744:a83a:ab:7e23%2]) with mapi id 15.20.7698.025; Fri, 28 Jun 2024 12:57:55 +0000 From: "Agarwal, Utsav" To: "Hennerich, Michael" , "dmitry.torokhov@gmail.com" , "linux-input@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: "Artamonovs, Arturs" , "Bimpikas, Vasileios" , "Gaskell, Oliver" , =?iso-8859-1?q?Nuno_S=E1?= Subject: [PATCH v2] adp5588-keys: Support for dedicated gpio operation Thread-Topic: [PATCH v2] adp5588-keys: Support for dedicated gpio operation Thread-Index: AdrJVdnSzNlyofTJQlia1zDLY76hug== Date: Fri, 28 Jun 2024 12:57:55 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-dg-ref: =?iso-8859-1?q?PG1ldGE+PGF0IG5tPSJib2R5LnR4dCIgcD0iYzpcdXNlcnNcdWF?= =?iso-8859-1?q?nYXJ3YTJcYXBwZGF0YVxyb2FtaW5nXDA5ZDg0OWI2LTMyZDMtNGE0MC04NWV?= =?iso-8859-1?q?lLTZiODRiYTI5ZTM1Ylxtc2dzXG1zZy0wN2RjZTkzYS0zNTRlLTExZWYtODR?= =?iso-8859-1?q?mMS02NDQ5N2RjZTVmODVcYW1lLXRlc3RcMDdkY2U5M2MtMzU0ZS0xMWVmLTg?= =?iso-8859-1?q?0ZjEtNjQ0OTdkY2U1Zjg1Ym9keS50eHQiIHN6PSI3MTUwIiB0PSIxMzM2NDA?= =?iso-8859-1?q?1MzA3Mzc1NjQxMTQiIGg9InFEbUVxcTdlZHRtRUh5aWtIZlBSZVhNbFlMYz0?= =?iso-8859-1?q?iIGlkPSIiIGJsPSIwIiBibz0iMSIgY2k9ImNBQUFBRVJIVTFSU1JVRk5DZ1V?= =?iso-8859-1?q?BQUVvQ0FBRFNDVFhLV3NuYUFlWWhkOHpQTEp1czVpRjN6TThzbTZ3REFBQUF?= =?iso-8859-1?q?BQUFBQUFBQUFBQUFBQUFBQUFBQUFIQUFBQURhQVFBQUFBQUFBQUFBQUFBQUF?= =?iso-8859-1?q?BQUFBQUFBQUFFQUFRQUJBQUFBM0xoU2ZnQUFBQUFBQUFBQUFBQUFBSjRBQUF?= =?iso-8859-1?q?CaEFHUUFhUUJmQUhNQVpRQmpBSFVBY2dCbEFGOEFjQUJ5QUc4QWFnQmxBR01?= =?iso-8859-1?q?BZEFCekFGOEFaZ0JoQUd3QWN3QmxBRjhBWmdCdkFITUFhUUIwQUdrQWRnQmx?= =?iso-8859-1?q?BQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUF?= =?iso-8859-1?q?BQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUF?= =?iso-8859-1?q?BQUFBQUFBQUVBQUFBQUFBQUFBZ0FBQUFBQW5nQUFBR0VBWkFCcEFGOEFjd0J?= =?iso-8859-1?q?sQUdNQWRRQnlBR1VBWHdCd0FISUFid0JxQUdVQVl3QjBBSE1BWHdCMEFHa0F?= =?iso-8859-1?q?aUUJ5QURFQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUF?= =?iso-8859-1?q?BQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUF?= =?iso-8859-1?q?BQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFRQUFBQUF?= =?iso-8859-1?q?BQUFBQ0FBQUFBQUNlQUFBQVlRQmtBR2tBWHdCekFHVUFZd0IxQUhJQVpRQmZ?= =?iso-8859-1?q?BSEFBY2dCdkFHb0FaUUJqQUhRQWN3QmZBSFFBYVFCbEFISUFNZ0FBQUFBQUF?= =?iso-8859-1?q?BQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUF?= =?iso-8859-1?q?BQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUF?= =?iso-8859-1?q?BQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFCQUFBQUFBQUFBQUlBQUFBQUFBPT0?= =?iso-8859-1?q?iLz48L21ldGE+?= x-ms-publictraffictype: Email x-ms-traffictypediagnostic: SJ0PR03MB6343:EE_|PH7PR03MB7195:EE_ x-ms-office365-filtering-correlation-id: 94846d5e-cd96-4dd4-10e4-08dc9771edee x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0;ARA:13230040|366016|376014|1800799024|38070700018; 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This support was previously present as a separate gpio driver, which was dropped with the commit 5ddc896088b0 ("gpio: gpio-adp5588: drop the driver") since the functionality was deemed to have been merged with adp5588-keys. To restore this, keypad specific checks in the probe function are relaxed if the following conditions are met: 1) "gpio-only" property has been specified for the node 2) No keypad rows/columns are specified The "gpio-only" property is introduced to simplify usage since it serves as a clear indication of the user's intention as opposed to being inferred from the number of rows and columns specified. This also adds simplicity for the accompanying dt binding update as well as interpretation of the same. In such a case, additional checks are also introduced to make sure that keypad and pure GPIO operation are mutually exclusive by checking for keypad specific properties (keypad,num-rows and keypad,num-columns). Signed-off-by: Utsav Agarwal Signed-off-by: Utsav Agarwal --- drivers/input/keyboard/adp5588-keys.c | 33 +++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c index 1b0279393df4..6bfe748797df 100644 --- a/drivers/input/keyboard/adp5588-keys.c +++ b/drivers/input/keyboard/adp5588-keys.c @@ -188,6 +188,7 @@ struct adp5588_kpad { u32 cols; u32 unlock_keys[2]; int nkeys_unlock; + bool gpio_only; unsigned short keycode[ADP5588_KEYMAPSIZE]; unsigned char gpiomap[ADP5588_MAXGPIO]; struct gpio_chip gc; @@ -647,6 +648,25 @@ static int adp5588_fw_parse(struct adp5588_kpad *kpad) struct i2c_client *client = kpad->client; int ret, i; + /* + * Check if the device is to be operated purely in GPIO mode. If + * so, confirm that no keypad rows or columns have been specified, since + * all GPINS should be configured as GPIO. + */ + if (kpad->gpio_only) { + ret = device_property_present(&client->dev, + "keypad,num-rows"); + if (ret) + return -EINVAL; + + ret = device_property_present(&client->dev, + "keypad,num-columns"); + if (ret) + return -EINVAL; + + return 0; + } + ret = matrix_keypad_parse_properties(&client->dev, &kpad->rows, &kpad->cols); if (ret) @@ -739,6 +759,7 @@ static int adp5588_probe(struct i2c_client *client) kpad->client = client; kpad->input = input; + kpad->gpio_only = device_property_present(&client->dev, "gpio-only"); error = adp5588_fw_parse(kpad); if (error) return error; @@ -790,6 +811,11 @@ static int adp5588_probe(struct i2c_client *client) if (error) return error; + if (!client->irq && kpad->gpio_only) { + dev_info(&client->dev, "Rev.%d, started as GPIO only\n", revid); + return 0; + } + error = devm_request_threaded_irq(&client->dev, client->irq, adp5588_hard_irq, adp5588_thread_irq, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, @@ -800,6 +826,13 @@ static int adp5588_probe(struct i2c_client *client) return error; } + + if (kpad->gpio_only) { + dev_info(&client->dev, "Rev.%d irq %d, started as GPIO only\n", + revid, client->irq); + return 0; + } + dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq); return 0; }