git.openwrt.org Git - openwrt/staging/pepe2k.git/blob

   1 From 97638920f1a40e2e0cab363d1e03837ff50c5478 Mon Sep 17 00:00:00 2001
   2 From: eng33 <eng33@waveshare.com>
   3 Date: Thu, 5 Dec 2024 17:19:23 +0800
   4 Subject: [PATCH] drivers:input:touchscreen: Add support for no irq to ili210x
   5  driver
   6
   7 Signed-off-by: eng33 <eng33@waveshare.com>
   8 ---
   9  drivers/input/touchscreen/ili210x.c | 63 ++++++++++++++++++++++++-----
  10  1 file changed, 52 insertions(+), 11 deletions(-)
  11
  12 --- a/drivers/input/touchscreen/ili210x.c
  13 +++ b/drivers/input/touchscreen/ili210x.c
  14 @@ -67,6 +67,8 @@ struct ili210x {
  15         u8 version_proto[2];
  16         u8 ic_mode[2];
  17         bool stop;
  18 +       struct timer_list poll_timer;
  19 +       struct work_struct poll_work;
  20  };
  21
  22  static int ili210x_read_reg(struct i2c_client *client,
  23 @@ -360,6 +362,34 @@ static irqreturn_t ili210x_irq(int irq,
  24         return IRQ_HANDLED;
  25  }
  26
  27 +static void ili210x_poll_work(struct work_struct *work)
  28 +{
  29 +       struct ili210x *priv = container_of(work, struct ili210x, poll_work);
  30 +       struct i2c_client *client = priv->client;
  31 +       const struct ili2xxx_chip *chip = priv->chip;
  32 +       u8 touchdata[ILI210X_DATA_SIZE] = { 0 };
  33 +       bool touch;
  34 +       int error;
  35 +
  36 +       error = chip->get_touch_data(client, touchdata);
  37 +       if (error) {
  38 +               dev_err(&client->dev, "Unable to get touch data: %d\n", error);
  39 +               return;
  40 +       }
  41 +
  42 +       touch = ili210x_report_events(priv, touchdata);
  43 +}
  44 +
  45 +static void ili210x_poll_timer_callback(struct timer_list *t)
  46 +{
  47 +       struct ili210x *priv = from_timer(priv, t, poll_timer);
  48 +
  49 +       schedule_work(&priv->poll_work);
  50 +
  51 +       if (!priv->stop)
  52 +               mod_timer(&priv->poll_timer, jiffies + msecs_to_jiffies(ILI2XXX_POLL_PERIOD));
  53 +}
  54 +
  55  static int ili251x_firmware_update_resolution(struct device *dev)
  56  {
  57         struct i2c_client *client = to_i2c_client(dev);
  58 @@ -945,11 +975,6 @@ static int ili210x_i2c_probe(struct i2c_
  59                 return -ENODEV;
  60         }
  61
  62 -       if (client->irq <= 0) {
  63 -               dev_err(dev, "No IRQ!\n");
  64 -               return -EINVAL;
  65 -       }
  66 -
  67         reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
  68         if (IS_ERR(reset_gpio))
  69                 return PTR_ERR(reset_gpio);
  70 @@ -1001,12 +1026,17 @@ static int ili210x_i2c_probe(struct i2c_
  71                 return error;
  72         }
  73
  74 -       error = devm_request_threaded_irq(dev, client->irq, NULL, ili210x_irq,
  75 -                                         IRQF_ONESHOT, client->name, priv);
  76 -       if (error) {
  77 -               dev_err(dev, "Unable to request touchscreen IRQ, err: %d\n",
  78 -                       error);
  79 -               return error;
  80 +       if (client->irq) {
  81 +               error = devm_request_threaded_irq(dev, client->irq, NULL, ili210x_irq,
  82 +                                       IRQF_ONESHOT, client->name, priv);
  83 +               if (error) {
  84 +                       dev_err(dev, "Unable to request touchscreen IRQ, err: %d\n", error);
  85 +                       return error;
  86 +               }
  87 +       } else {
  88 +               timer_setup(&priv->poll_timer, ili210x_poll_timer_callback, 0);
  89 +               mod_timer(&priv->poll_timer, jiffies + msecs_to_jiffies(ILI2XXX_POLL_PERIOD));
  90 +               INIT_WORK(&priv->poll_work, ili210x_poll_work);
  91         }
  92
  93         error = devm_add_action_or_reset(dev, ili210x_stop, priv);
  94 @@ -1029,6 +1059,16 @@ static int ili210x_i2c_probe(struct i2c_
  95         return 0;
  96  }
  97
  98 +static void ili210x_i2c_remove(struct i2c_client *client)
  99 +{
 100 +       struct ili210x *tsdata = i2c_get_clientdata(client);
 101 +
 102 +       if (!client->irq) {
 103 +               del_timer(&tsdata->poll_timer);
 104 +               cancel_work_sync(&tsdata->poll_work);
 105 +       }
 106 +}
 107 +
 108  static const struct i2c_device_id ili210x_i2c_id[] = {
 109         { "ili210x", (long)&ili210x_chip },
 110         { "ili2117", (long)&ili211x_chip },
 111 @@ -1054,6 +1094,7 @@ static struct i2c_driver ili210x_ts_driv
 112         },
 113         .id_table = ili210x_i2c_id,
 114         .probe = ili210x_i2c_probe,
 115 +       .remove   = ili210x_i2c_remove,
 116  };
 117
 118  module_i2c_driver(ili210x_ts_driver);