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Alexandru HossuandGreg Kroah-Hartman
fb2ae75b1a
tegra_nvec_remove() unconditionally sets pm_power_off = NULL, even if nvec was not the one that registered it. This breaks any other driver that may have set pm_power_off to its own handler. Replace the unconditional assignment with a guarded check so that pm_power_off is only cleared if nvec was the one that set it. Also remove the stale FIXME comment, as the guard addresses exactly what it was asking for. Reviewed-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Alexandru Hossu <hossu.alexandru@gmail.com> Link: https://patch.msgid.link/20260427081713.3401874-3-hossu.alexandru@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
NVEC: An NVidia compliant Embedded Controller Protocol Implementation This is an implementation of the NVEC protocol used to communicate with an embedded controller (EC) via I2C bus. The EC is an I2C master while the host processor is the I2C slave. Requests from the host processor to the EC are started by triggering a gpio line. There is no written documentation of the protocol available to the public, but the source code[1] of the published nvec reference drivers can be a guide. This driver is currently only used by the AC100 project[2], but it is likely, that other Tegra boards (not yet mainlined, if ever) also use it. [1] e.g. https://nv-tegra.nvidia.com/gitweb/?p=linux-2.6.git;a=tree;f=arch/arm/mach-tegra/nvec;hb=android-tegra-2.6.32 [2] http://gitorious.org/ac100, http://launchpad.net/ac100