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Fri, 5 Mar 2021 04:13:31 +0000 From: Jeff LaBundy To: dmitry.torokhov@gmail.com, robh+dt@kernel.org Cc: linux-input@vger.kernel.org, devicetree@vger.kernel.org, Jeff LaBundy Subject: [PATCH 5/9] Input: iqs5xx - close bootloader using hardware reset Date: Thu, 4 Mar 2021 22:12:32 -0600 Message-Id: <20210305041236.3489-6-jeff@labundy.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210305041236.3489-1-jeff@labundy.com> References: <20210305041236.3489-1-jeff@labundy.com> X-Originating-IP: [136.49.90.243] X-ClientProxiedBy: SA9PR13CA0086.namprd13.prod.outlook.com (2603:10b6:806:23::31) To SN6PR08MB5517.namprd08.prod.outlook.com (2603:10b6:805:fb::32) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (136.49.90.243) by SA9PR13CA0086.namprd13.prod.outlook.com (2603:10b6:806:23::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3912.9 via Frontend Transport; Fri, 5 Mar 2021 04:13:31 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: c95a6bcb-b08c-4a53-55a0-08d8df8d096a X-MS-TrafficTypeDiagnostic: SN6PR08MB5693: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:7691; 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Rather than using the former option for successful firmware update procedures and reserving the latter for recovering the device upon failure, simply use hardware reset for all cases. The post-bootloader initialization delay increases marginally when triggered by a hardware reset, so increase the wait time to ensure the device does not subsequently fail to respond. As part of this change, refactor the return path to avoid an extra assignment and to make the logic a bit smaller. Signed-off-by: Jeff LaBundy --- drivers/input/touchscreen/iqs5xx.c | 24 +++++++----------------- 1 file changed, 7 insertions(+), 17 deletions(-) diff --git a/drivers/input/touchscreen/iqs5xx.c b/drivers/input/touchscreen/iqs5xx.c index 0920516124c7..a990c176abf7 100644 --- a/drivers/input/touchscreen/iqs5xx.c +++ b/drivers/input/touchscreen/iqs5xx.c @@ -832,7 +832,7 @@ static int iqs5xx_fw_file_parse(struct i2c_client *client, static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file) { struct iqs5xx_private *iqs5xx = i2c_get_clientdata(client); - int error, error_bl = 0; + int error, error_init = 0; u8 *pmap; if (iqs5xx->dev_id_info.bl_status == IQS5XX_BL_STATUS_NONE) @@ -875,21 +875,14 @@ static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file) error = iqs5xx_bl_verify(client, IQS5XX_CSTM, pmap + IQS5XX_CHKSM_LEN + IQS5XX_APP_LEN, IQS5XX_CSTM_LEN); - if (error) - goto err_reset; - - error = iqs5xx_bl_cmd(client, IQS5XX_BL_CMD_EXEC, 0); err_reset: - if (error) { - iqs5xx_reset(client); - usleep_range(10000, 10100); - } + iqs5xx_reset(client); + usleep_range(15000, 15100); - error_bl = error; - error = iqs5xx_dev_init(client); - if (!error && !iqs5xx->dev_id_info.bl_status) - error = -EINVAL; + error_init = iqs5xx_dev_init(client); + if (!iqs5xx->dev_id_info.bl_status) + error_init = error_init ? : -EINVAL; enable_irq(client->irq); @@ -898,10 +891,7 @@ static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file) err_kfree: kfree(pmap); - if (error_bl) - return error_bl; - - return error; + return error ? : error_init; } static ssize_t fw_file_store(struct device *dev,