Thread (8 messages) 8 messages, 3 authors, 2021-06-15

Re: [PATCH 2/2 v4] input: add SparkFun Qwiic Joystick driver

From: Oleh Kravchenko <hidden>
Date: 2021-06-15 07:50:05
Also in: linux-devicetree

Hello Dmitry,
Thank you for your code-review
15 черв. 2021 р. о 07:57 Dmitry Torokhov [off-list ref] пише:

Hi Oleh,
quoted
+struct qwiic_data {
+    __be16 x;
+    __be16 y;
+    u8 thumb;
+} __packed;
The members of this structure are naturally aligned, so there is no need
to declare it as __packed.
Sorry, I forgot to fix this nitpick :-/
quoted
+
+static void qwiic_poll(struct input_dev *input)
+{
+    struct qwiic_jsk *priv;
+    struct qwiic_data data;
+    int err;
+
+    priv = input_get_drvdata(input);
+
+    err = i2c_smbus_read_i2c_block_data(priv->client, QWIIC_JSK_REG_DATA,
+                        sizeof(data), (u8 *)&data);
+    if (err != sizeof(data))
+        return;
+
+    input_report_abs(input, ABS_X, be16_to_cpu(data.x) >> 6);
+    input_report_abs(input, ABS_Y, be16_to_cpu(data.y) >> 6);
+    input_report_key(input, BTN_THUMBL, !data.thumb);
+    input_sync(input);
+}
+
+static int qwiic_probe(struct i2c_client *client,
+               const struct i2c_device_id *id)
The probe() does not use the i2c_device_id parameter, so I will switch
it to probe_new() to avoid the temptation of using it in the future.
Sounds awesome!
Please let me know if you disagree, otherwise I will go and apply (no
need to resubmit).
I agree,
please merge.
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