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regulator: Fix for v7.3

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One fix here, for a race condition on startup in the tps65185 driver
 which is seen on actual boards - we need a delay after waking the chip
 before it is ready to talk to the host.
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Merge tag 'regulator-fix-v7.3-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fix from Mark Brown:
 "One fix here, for a race condition on startup in the tps65185 driver
  which is seen on actual boards - we need a delay after waking the chip
  before it is ready to talk to the host"

* tag 'regulator-fix-v7.3-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: tps65185: wait for the IC to wake before the first I2C access
This commit is contained in:
Linus Torvalds 2026-08-27 12:21:56 -07:00
commit 6253a29206
1 changed files with 6 additions and 0 deletions
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6
drivers/regulator/tps65185.c
View File

@ -5,6 +5,7 @@
#include <linux/cleanup.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
@ -375,6 +376,11 @@ static int tps65185_probe(struct i2c_client *client)
return dev_err_probe(&client->dev, ret,
"failed to get vin regulator\n");
// TPS65185x PMIC for E Ink Vizplex Enabled Electronic Paper Display Chapter 7.6 Figure 2:
// "Minimum delay time between WAKEUP rising edge and IC ready to accept I2C transaction."
// https://www.ti.com/lit/ds/symlink/tps65185.pdf
usleep_range(1800, 3000);
data->dev = &client->dev;
i2c_set_clientdata(client, data);