diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-27 12:21:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-27 12:21:56 -0700 |
| commit | 6253a29206959128f5d99a119fcf29bd7fb3c106 (patch) | |
| tree | f934fd74b724c39efa0e29b0eb3fa6c6fe9bcd78 /drivers | |
| parent | 7cec13314dd8935afbfc0430d9d43fad75285b37 (diff) | |
| parent | 44f7b876b7c6c7b3a219b7a810d3d9548df21540 (diff) | |
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
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/regulator/tps65185.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/regulator/tps65185.c b/drivers/regulator/tps65185.c index 1f13e4156cab..6a3130177e7a 100644 --- a/drivers/regulator/tps65185.c +++ b/drivers/regulator/tps65185.c @@ -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); |