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| author | Sebastian Reichel <sre@kernel.org> | 2025-11-19 01:41:41 +0100 |
|---|---|---|
| committer | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2025-11-21 19:05:27 +0200 |
| commit | 752630cb8c62abca0407f96cc7baa2e13335cd15 (patch) | |
| tree | afa0ce373652e7a13e6a33f91562c7e76bef26ec /scripts/extract-fwblobs | |
| parent | 29be646f75c4406bdd8322572a6054ebd22bf63b (diff) | |
| download | linux-752630cb8c62abca0407f96cc7baa2e13335cd15.tar.gz | |
platform: arm64: thinkpad-t14s-ec: sleep after EC access
The ACPI ECRD and ECWR functions have a 10ms sleep at the end. It turns
out, that this is sometimes needed to avoid I2C transmission failures,
especially for functions doing regmap_update_bits (and thus read + write
shortly after each other). This fixes problems like the following
appearing in the kernel log:
leds platform::micmute: Setting an LED's brightness failed (-6)
leds platform::kbd_backlight: Setting an LED's brightness failed (-6)
The ACPI QEVT function used to read the interrupt status register also
has a 10ms sleep at the end. Without that there are problems with
reading multiple events following directly after each other resulting
in the following error message being logged:
thinkpad-t14s-ec 4-0028: Failed to read event
Fixes: 60b7ab6ce030 ("platform: arm64: thinkpad-t14s-ec: new driver")
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Link: https://patch.msgid.link/20251119-thinkpad-t14s-ec-improvements-v2-2-441219857c02@kernel.org
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Diffstat (limited to 'scripts/extract-fwblobs')
0 files changed, 0 insertions, 0 deletions