From: Hans de Goede Date: Wed, 9 Sep 2020 10:32:33 +0000 (+0200) Subject: i2c: core: Call i2c_acpi_install_space_handler() before i2c_acpi_register_devices() X-Git-Tag: v4.9.238~18 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8b086aa98d2597439228dcb0f3adfb0214f228ab;p=platform%2Fkernel%2Flinux-amlogic.git i2c: core: Call i2c_acpi_install_space_handler() before i2c_acpi_register_devices() [ Upstream commit 21653a4181ff292480599dad996a2b759ccf050f ] Some ACPI i2c-devices _STA method (which is used to detect if the device is present) use autodetection code which probes which device is present over i2c. This requires the I2C ACPI OpRegion handler to be registered before we enumerate i2c-clients under the i2c-adapter. This fixes the i2c touchpad on the Lenovo ThinkBook 14-IIL and ThinkBook 15 IIL not getting an i2c-client instantiated and thus not working. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1842039 Signed-off-by: Hans de Goede Reviewed-by: Mika Westerberg Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 80d82c6..4fd7bfd 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -1858,8 +1858,8 @@ static int i2c_register_adapter(struct i2c_adapter *adap) /* create pre-declared device nodes */ of_i2c_register_devices(adap); - i2c_acpi_register_devices(adap); i2c_acpi_install_space_handler(adap); + i2c_acpi_register_devices(adap); if (adap->nr < __i2c_first_dynamic_bus_num) i2c_scan_static_board_info(adap);