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Miller" , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nfc@lists.01.org, netdev@vger.kernel.org, Stephan Gerhold Subject: [PATCH] NFC: nxp-nci: Make firmware GPIO pin optional Date: Mon, 30 Nov 2020 12:04:42 +0100 Message-Id: <20201130110447.16891-1-frieder.schrempf@kontron.de> X-Mailer: git-send-email 2.17.1 X-Originating-IP: [46.142.77.113] X-ClientProxiedBy: AM7PR04CA0003.eurprd04.prod.outlook.com (2603:10a6:20b:110::13) To AM0PR10MB2963.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:208:157::14) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from fs-work.localdomain (46.142.77.113) by AM7PR04CA0003.eurprd04.prod.outlook.com (2603:10a6:20b:110::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3611.20 via Frontend Transport; Mon, 30 Nov 2020 11:06:11 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: d8cc93e9-0864-4d5a-bb01-08d8951ff274 X-MS-TrafficTypeDiagnostic: AM9PR10MB4402: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5797; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: sA19WqVjsjCsNjoq15JVXb4GvP63dViLXqDDFWfz8J7jWpA6RG8Fz1/Mwx+8qb+xjyWIusktL0ni3vc/wWATKH3+KWmhMLOMhv3WM+0eeeqbwgC7Kd9jfFR462hvo8LX9DjK7az/jqFTUe8ph4tymPtJH5vpO/KNZ3A84GFQNKosfU5u4eMoqh/gNHMsexJ8RYKksP/LJiGyn7ZyoivdPqgN8wn4KykWorO6TrWxb1oK3QQ0t9Zox8N/Dh3VifMIH3K4zAT+N1NigdN2wbCuVmGRTfWERw6bzfaqwwzMtEMB7g0IFkVrC/pMlw65DsAE2z/PoJRG7UWQy7v8EFdGzQ== X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM0PR10MB2963.EURPRD10.PROD.OUTLOOK.COM;PTR:;CAT:NONE;SFS:(4636009)(39860400002)(136003)(366004)(396003)(346002)(376002)(2906002)(1076003)(6486002)(8936002)(478600001)(5660300002)(4326008)(8676002)(66946007)(86362001)(66476007)(66556008)(36756003)(52116002)(6666004)(6512007)(54906003)(83380400001)(16526019)(316002)(7049001)(110136005)(2616005)(186003)(26005)(6506007)(956004);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: kontron.de X-MS-Exchange-CrossTenant-Network-Message-Id: d8cc93e9-0864-4d5a-bb01-08d8951ff274 X-MS-Exchange-CrossTenant-AuthSource: AM0PR10MB2963.EURPRD10.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Nov 2020 11:06:11.8765 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 8c9d3c97-3fd9-41c8-a2b1-646f3942daf1 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 9vuSxMiZwSCNd+p++EIundfCdFlSCkTDjlzebHfwmauJnjt9WNalCLHonedwUN9wdnLehX34+ABU97mhRUW61O0ymT0qZxReZyii8MEkuUQ= X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM9PR10MB4402 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Frieder Schrempf There are other NXP NCI compatible NFC controllers such as the PN7150 that use an integrated firmware and therefore do not have a GPIO to select firmware downloading mode. To support these kind of chips, let's make the firmware GPIO optional. Signed-off-by: Frieder Schrempf --- Documentation/devicetree/bindings/net/nfc/nxp-nci.txt | 2 +- drivers/nfc/nxp-nci/i2c.c | 5 +++-- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/net/nfc/nxp-nci.txt b/Documentation/devicetree/bindings/net/nfc/nxp-nci.txt index cfaf88998918..cb2385c277d0 100644 --- a/Documentation/devicetree/bindings/net/nfc/nxp-nci.txt +++ b/Documentation/devicetree/bindings/net/nfc/nxp-nci.txt @@ -6,11 +6,11 @@ Required properties: - reg: address on the bus - interrupts: GPIO interrupt to which the chip is connected - enable-gpios: Output GPIO pin used for enabling/disabling the chip -- firmware-gpios: Output GPIO pin used to enter firmware download mode Optional SoC Specific Properties: - pinctrl-names: Contains only one value - "default". - pintctrl-0: Specifies the pin control groups used for this controller. +- firmware-gpios: Output GPIO pin used to enter firmware download mode Example (for ARM-based BeagleBone with NPC100 NFC controller on I2C2): diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c index 9f60e4dc5a90..528893686e18 100644 --- a/drivers/nfc/nxp-nci/i2c.c +++ b/drivers/nfc/nxp-nci/i2c.c @@ -47,7 +47,8 @@ static int nxp_nci_i2c_set_mode(void *phy_id, { struct nxp_nci_i2c_phy *phy = (struct nxp_nci_i2c_phy *) phy_id; - gpiod_set_value(phy->gpiod_fw, (mode == NXP_NCI_MODE_FW) ? 1 : 0); + if (phy->gpiod_fw) + gpiod_set_value(phy->gpiod_fw, (mode == NXP_NCI_MODE_FW) ? 1 : 0); gpiod_set_value(phy->gpiod_en, (mode != NXP_NCI_MODE_COLD) ? 1 : 0); usleep_range(10000, 15000); @@ -286,7 +287,7 @@ static int nxp_nci_i2c_probe(struct i2c_client *client, return PTR_ERR(phy->gpiod_en); } - phy->gpiod_fw = devm_gpiod_get(dev, "firmware", GPIOD_OUT_LOW); + phy->gpiod_fw = devm_gpiod_get_optional(dev, "firmware", GPIOD_OUT_LOW); if (IS_ERR(phy->gpiod_fw)) { nfc_err(dev, "Failed to get FW gpio\n"); return PTR_ERR(phy->gpiod_fw);