Input: melfas_mip4 - add product_id sysfs attribute

Add product_id sysfs attribute and update protocol version to support it.

Signed-off-by: Sangwon Jee <jeesw@melfas.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/touchscreen/melfas_mip4.c b/drivers/input/touchscreen/melfas_mip4.c
index 552a3773f79d0b7815d6d180f7aabc9083ff6c92..8739cb718b4c430f7d647008df361974857c76ca 100644 (file)
--- a/drivers/input/touchscreen/melfas_mip4.c
+++ b/drivers/input/touchscreen/melfas_mip4.c
@@ -33,7 +33,7 @@
 
 /*****************************************************************
  * Protocol
- * Version : MIP 4.0 Rev 4.6
+ * Version : MIP 4.0 Rev 5.4
  *****************************************************************/
 
 /* Address */
@@ -81,6 +81,9 @@
 #define MIP4_R1_INFO_IC_HW_CATEGORY            0x77
 #define MIP4_R1_INFO_CONTACT_THD_SCR           0x78
 #define MIP4_R1_INFO_CONTACT_THD_KEY           0x7A
+#define MIP4_R1_INFO_PID                               0x7C
+#define MIP4_R1_INFO_VID                               0x7E
+#define MIP4_R1_INFO_SLAVE_ADDR                        0x80
 
 #define MIP4_R0_EVENT                          0x02
 #define MIP4_R1_EVENT_SUPPORTED_FUNC           0x00
@@ -157,6 +160,7 @@ struct mip4_ts {
 
        char phys[32];
        char product_name[16];
+       u16 product_id;
        char ic_name[4];
 
        unsigned int max_x;
@@ -264,6 +268,18 @@ static int mip4_query_device(struct mip4_ts *ts)
                dev_dbg(&ts->client->dev, "product name: %.*s\n",
                        (int)sizeof(ts->product_name), ts->product_name);
 
+       /* Product ID */
+       cmd[0] = MIP4_R0_INFO;
+       cmd[1] = MIP4_R1_INFO_PID;
+       error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 2);
+       if (error) {
+               dev_warn(&ts->client->dev,
+                        "Failed to retrieve product id: %d\n", error);
+       } else {
+               ts->product_id = get_unaligned_le16(&buf[0]);
+               dev_dbg(&ts->client->dev, "product id: %04X\n", ts->product_id);
+       }
+
        /* IC name */
        cmd[0] = MIP4_R0_INFO;
        cmd[1] = MIP4_R1_INFO_IC_NAME;
@@ -1348,6 +1364,25 @@ static ssize_t mip4_sysfs_read_hw_version(struct device *dev,
 
 static DEVICE_ATTR(hw_version, S_IRUGO, mip4_sysfs_read_hw_version, NULL);
 
+static ssize_t mip4_sysfs_read_product_id(struct device *dev,
+                                         struct device_attribute *attr,
+                                         char *buf)
+{
+       struct i2c_client *client = to_i2c_client(dev);
+       struct mip4_ts *ts = i2c_get_clientdata(client);
+       size_t count;
+
+       mutex_lock(&ts->input->mutex);
+
+       count = snprintf(buf, PAGE_SIZE, "%04X\n", ts->product_id);
+
+       mutex_unlock(&ts->input->mutex);
+
+       return count;
+}
+
+static DEVICE_ATTR(product_id, S_IRUGO, mip4_sysfs_read_product_id, NULL);
+
 static ssize_t mip4_sysfs_read_ic_name(struct device *dev,
                                          struct device_attribute *attr,
                                          char *buf)
@@ -1371,6 +1406,7 @@ static DEVICE_ATTR(ic_name, S_IRUGO, mip4_sysfs_read_ic_name, NULL);
 static struct attribute *mip4_attrs[] = {
        &dev_attr_fw_version.attr,
        &dev_attr_hw_version.attr,
+       &dev_attr_product_id.attr,
        &dev_attr_ic_name.attr,
        &dev_attr_update_fw.attr,
        NULL,
@@ -1572,6 +1608,6 @@ static struct i2c_driver mip4_driver = {
 module_i2c_driver(mip4_driver);
 
 MODULE_DESCRIPTION("MELFAS MIP4 Touchscreen");
-MODULE_VERSION("2016.09.28");
+MODULE_VERSION("2016.10.20");
 MODULE_AUTHOR("Sangwon Jee <jeesw@melfas.com>");
 MODULE_LICENSE("GPL");