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39 lines
1.2 KiB
Diff
39 lines
1.2 KiB
Diff
From a02f1a28cf74e9593e5b2e1c18fe0cbe6cc59e42 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Thu, 25 Apr 2024 17:13:05 +0100
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Subject: [PATCH 1072/1085] regulator/rpi-panel: Power off display on shutdown
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Adds a shutdown function to turn off the backlight, bridge, and
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touch controller on shutdown.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/regulator/rpi-panel-attiny-regulator.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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--- a/drivers/regulator/rpi-panel-attiny-regulator.c
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+++ b/drivers/regulator/rpi-panel-attiny-regulator.c
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@@ -370,6 +370,14 @@ static void attiny_i2c_remove(struct i2c
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mutex_destroy(&state->lock);
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}
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+static void attiny_i2c_shutdown(struct i2c_client *client)
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+{
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+ struct attiny_lcd *state = i2c_get_clientdata(client);
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+
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+ regmap_write(state->regmap, REG_PWM, 0);
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+ regmap_write(state->regmap, REG_POWERON, 0);
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+}
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+
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static const struct of_device_id attiny_dt_ids[] = {
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{ .compatible = "raspberrypi,7inch-touchscreen-panel-regulator" },
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{},
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@@ -384,6 +392,7 @@ static struct i2c_driver attiny_regulato
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},
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.probe = attiny_i2c_probe,
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.remove = attiny_i2c_remove,
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+ .shutdown = attiny_i2c_shutdown,
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};
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module_i2c_driver(attiny_regulator_driver);
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