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Mon, 18 Jan 2021 20:44:26 +0000 From: Jeff LaBundy To: dmitry.torokhov@gmail.com Cc: linux-input@vger.kernel.org, Jeff LaBundy Subject: [PATCH 04/10] input: iqs5xx: Expose firmware revision to user space Date: Mon, 18 Jan 2021 14:43:40 -0600 Message-Id: <1611002626-5889-5-git-send-email-jeff@labundy.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1611002626-5889-1-git-send-email-jeff@labundy.com> References: <1611002626-5889-1-git-send-email-jeff@labundy.com> X-Originating-IP: [136.49.173.128] X-ClientProxiedBy: SN4PR0501CA0137.namprd05.prod.outlook.com (2603:10b6:803:2c::15) To SN6PR08MB5517.namprd08.prod.outlook.com (2603:10b6:805:fb::32) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (136.49.173.128) by SN4PR0501CA0137.namprd05.prod.outlook.com (2603:10b6:803:2c::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.3784.6 via Frontend Transport; Mon, 18 Jan 2021 20:44:26 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 3bfb8b5c-7407-450b-8554-08d8bbf1d876 X-MS-TrafficTypeDiagnostic: SN6PR08MB4846: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3968; 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Having the ability to read this field from user space can be useful during development. As such, promote the fw_file attribute from W/O to R/W. Writing to the attribute pushes firmware to the device as normal, but reading from it will now return the customer-assigned revision field as an unsigned integer (e.g. 256 = 1.0, 257 = 1.1 and so on). Signed-off-by: Jeff LaBundy --- drivers/input/touchscreen/iqs5xx.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/input/touchscreen/iqs5xx.c b/drivers/input/touchscreen/iqs5xx.c index b2de8c67..5ee22ab 100644 --- a/drivers/input/touchscreen/iqs5xx.c +++ b/drivers/input/touchscreen/iqs5xx.c @@ -64,6 +64,7 @@ #define IQS5XX_XY_CFG0 0x0669 #define IQS5XX_X_RES 0x066E #define IQS5XX_Y_RES 0x0670 +#define IQS5XX_EXP_FILE 0x0677 #define IQS5XX_CHKSM 0x83C0 #define IQS5XX_APP 0x8400 #define IQS5XX_CSTM 0xBE00 @@ -99,6 +100,7 @@ struct iqs5xx_private { struct input_dev *input; struct gpio_desc *reset_gpio; struct mutex lock; + u16 exp_file; u8 bl_status; }; @@ -666,6 +668,10 @@ static int iqs5xx_dev_init(struct i2c_client *client) return -EINVAL; } + error = iqs5xx_read_word(client, IQS5XX_EXP_FILE, &iqs5xx->exp_file); + if (error) + return error; + error = iqs5xx_axis_init(client); if (error) return error; @@ -1004,7 +1010,15 @@ static ssize_t fw_file_store(struct device *dev, return count; } -static DEVICE_ATTR_WO(fw_file); +static ssize_t fw_file_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iqs5xx_private *iqs5xx = dev_get_drvdata(dev); + + return scnprintf(buf, PAGE_SIZE, "%u\n", iqs5xx->exp_file); +} + +static DEVICE_ATTR_RW(fw_file); static struct attribute *iqs5xx_attrs[] = { &dev_attr_fw_file.attr,