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32 lines
1.1 KiB
Diff
32 lines
1.1 KiB
Diff
From 6089ad38cfbede7abb69dbf1ca9b7dd30711b09e Mon Sep 17 00:00:00 2001
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From: Ondrej Jirman <megi@xff.cz>
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Date: Sat, 26 Nov 2022 15:18:14 +0100
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Subject: input: pinephone-keyboard: Wait a bit after enabling vbus
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In case the MCU was browned out, we want to wait a bit after enabling
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VBUS and before probing the MCU over I2C, for the MCU to initialize.
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Otherwise it may be possible for the MCU to fail to respond during probe
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and for the driver to fail initialization.
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Signed-off-by: Ondrej Jirman <megi@xff.cz>
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---
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drivers/input/keyboard/pinephone-keyboard.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/drivers/input/keyboard/pinephone-keyboard.c b/drivers/input/keyboard/pinephone-keyboard.c
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index ceeb26069c8f..e4e266f1b70f 100644
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--- a/drivers/input/keyboard/pinephone-keyboard.c
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+++ b/drivers/input/keyboard/pinephone-keyboard.c
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@@ -350,6 +350,8 @@ static int ppkb_probe(struct i2c_client *client)
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return error;
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}
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+ mdelay(100);
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+
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ret = i2c_smbus_read_i2c_block_data(client, 0, sizeof(info), info);
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if (ret != sizeof(info)) {
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error = ret < 0 ? ret : -EIO;
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--
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2.35.3
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