nvidia-tegra-modules.git/include/linux/platform_data/pwm_fan.h, branch rtss22-ae NVIDIA's kernel modules to support tegra chips (used in Jetson boards) pwm: fan: Add support for always on fan 2020-12-25T17:38:32+00:00 Mantravadi Karthik mkarthik@nvidia.com 2020-11-20T07:43:40+00:00 c3cd2b4417ea8767d35b4e04ba9731fb58a2a477 Why? In case of continuous governor, the fan-poweron pwm value is assumed to be at index 1 of pwm values. In case of tmargin the pwm table would be reversed (high to low) and hence the assumption is invalid. How? While calculating the pwm value in the case of continuous governor, add a check if the cooling device is always on fan. If true, for all values of temp, pwm should be calculated instead of assigning 0. Bug 200646929 Change-Id: Ibed572fa2af9f8bd36a4a4cbb472029e21aeb442 Signed-off-by: Mantravadi Karthik <mkarthik@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2448826 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Bibek Basu <bbasu@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit 
Why?
In case of continuous governor, the fan-poweron pwm
value is assumed to be at index 1 of pwm values.
In case of tmargin the pwm table would be reversed
(high to low) and hence the assumption is invalid.

How?
While calculating the pwm value in the case of
continuous governor, add a check if the cooling device
is always on fan. If true, for all values of temp,
pwm should be calculated instead of assigning 0.

Bug 200646929

Change-Id: Ibed572fa2af9f8bd36a4a4cbb472029e21aeb442
Signed-off-by: Mantravadi Karthik <mkarthik@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2448826
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
thermal: pwm_fan: Add platform data 2018-07-19T10:58:05+00:00 Anshul Jain anshulj@nvidia.com 2012-12-01T00:41:54+00:00 dbdd954bffb6e7fdb594d3d40a8cd5818eac268d pwm_fan driver is moved to nvidia repo and platform data related to it is pulled from below commits Bug 200430924 Bug 1179033 Bug 1259204 Bug 1261177 Bug 1259488 Bug 1259204 Bug 1388303 Bug 1399542 Bug 1489876 Change based on below commits from linux-4.9 2c03205c thermal: pwm_fan: Add PWM controlled fan driver e4443760 thermal: pwm_fan: Add sysfs node for state cap 2e2f0810 thermal: pwm_fan: Add support for look up table f0e562bc thermal: pwm_fan: toggle gpio in suspend/resume 132ef9d7 arm:tegra:loki: update fan pwm period Signed-off-by: Anshul Jain <anshulj@nvidia.com> Change-Id: Ia6d99e22c8a32e8a98f7a54073397721c65f220f Reviewed-on: https://git-master.nvidia.com/r/1780502 Reviewed-by: Ajay Nandakumar M <anandakumarm@nvidia.com> Reviewed-by: Krishna Yarlagadda <kyarlagadda@nvidia.com> Tested-by: Krishna Yarlagadda <kyarlagadda@nvidia.com> GVS: Gerrit_Virtual_Submit Tested-by: Ajay Nandakumar M <anandakumarm@nvidia.com> Reviewed-by: Sachin Nikam <snikam@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
pwm_fan driver is moved to nvidia repo and platform data related
to it is pulled from below commits

Bug 200430924
Bug 1179033
Bug 1259204
Bug 1261177
Bug 1259488
Bug 1259204
Bug 1388303
Bug 1399542
Bug 1489876

Change based on below commits from linux-4.9
2c03205c thermal: pwm_fan: Add PWM controlled fan driver
e4443760 thermal: pwm_fan: Add sysfs node for state cap
2e2f0810 thermal: pwm_fan: Add support for look up table
f0e562bc thermal: pwm_fan: toggle gpio in suspend/resume
132ef9d7 arm:tegra:loki: update fan pwm period

Signed-off-by: Anshul Jain <anshulj@nvidia.com>
Change-Id: Ia6d99e22c8a32e8a98f7a54073397721c65f220f
Reviewed-on: https://git-master.nvidia.com/r/1780502
Reviewed-by: Ajay Nandakumar M <anandakumarm@nvidia.com>
Reviewed-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Tested-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: Ajay Nandakumar M <anandakumarm@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>