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

   1 From fd373fba7abfec9f8fed6e5e439d4df61811bd32 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 16 May 2024 18:26:36 +0100
   4 Subject: [PATCH 1091/1135] regulator: rpi_panel_v2: Add remove and shutdown
   5  hooks
   6
   7 Add shutdown and remove hooks so that the panel gets powered
   8 off with the system.
   9
  10 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  11 ---
  12  drivers/regulator/rpi-panel-v2-regulator.c | 18 ++++++++++++++++++
  13  1 file changed, 18 insertions(+)
  14
  15 --- a/drivers/regulator/rpi-panel-v2-regulator.c
  16 +++ b/drivers/regulator/rpi-panel-v2-regulator.c
  17 @@ -104,6 +104,7 @@ static int rpi_panel_v2_i2c_probe(struct
  18                 return -ENOMEM;
  19
  20         mutex_init(&state->lock);
  21 +       i2c_set_clientdata(i2c, state);
  22
  23         regmap = devm_regmap_init_i2c(i2c, &rpi_panel_regmap_config);
  24         if (IS_ERR(regmap)) {
  25 @@ -168,6 +169,21 @@ error:
  26         return ret;
  27  }
  28
  29 +static void rpi_panel_v2_i2c_remove(struct i2c_client *client)
  30 +{
  31 +       struct rpi_panel_v2_lcd *state = i2c_get_clientdata(client);
  32 +
  33 +       mutex_destroy(&state->lock);
  34 +}
  35 +
  36 +static void rpi_panel_v2_i2c_shutdown(struct i2c_client *client)
  37 +{
  38 +       struct rpi_panel_v2_lcd *state = i2c_get_clientdata(client);
  39 +
  40 +       regmap_write(state->regmap, REG_PWM, 0);
  41 +       regmap_write(state->regmap, REG_POWERON, 0);
  42 +}
  43 +
  44  static const struct of_device_id rpi_panel_v2_dt_ids[] = {
  45         { .compatible = "raspberrypi,v2-touchscreen-panel-regulator" },
  46         {},
  47 @@ -180,6 +196,8 @@ static struct i2c_driver rpi_panel_v2_re
  48                 .of_match_table = of_match_ptr(rpi_panel_v2_dt_ids),
  49         },
  50         .probe = rpi_panel_v2_i2c_probe,
  51 +       .remove = rpi_panel_v2_i2c_remove,
  52 +       .shutdown = rpi_panel_v2_i2c_shutdown,
  53  };
  54
  55  module_i2c_driver(rpi_panel_v2_regulator_driver);