linux-next.git/drivers/devfreq, branch master

Merge branch 'devfreq-next' of https://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git

2026-07-03T14:44:24+00:00

Replace by more specific (c files)

2026-07-03T05:38:17+00:00

Replace the #include of by the more specific where applicable. For most cases the include can be dropped completely, only a few drivers need one or two headers added. Acked-by: Danilo Krummrich Acked-by: Takashi Sakamoto Acked-by: Bjorn Helgaas Link: https://patch.msgid.link/1a3f2007c5c5dcf555c09a4035ce3ae8ef1b6c49.1782808461.git.u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König (The Capable Hub)

devfreq: change devfreq_event_class to a const struct

2026-05-22T11:28:46+00:00

The class_create() call has been deprecated in favor of class_register() as the driver core now allows for a struct class to be in read-only memory. Change devfreq_event_class to be a const struct class and drop the class_create() call. Compile tested. Link: https://lore.kernel.org/all/2023040244-duffel-pushpin-f738@gregkh/ Suggested-by: Greg Kroah-Hartman Signed-off-by: Jori Koolstra Link: https://patch.msgid.link/20260303162505.3748001-1-jkoolstra@xs4all.nl Signed-off-by: Greg Kroah-Hartman

PM / devfreq: Fix governor_store() failing when device has no current governor

2026-05-10T12:53:44+00:00

Since devfreq_remove_governor() may clear the device's current governor in certain situations, while governors actually exist independently of the device, directly returning EINVAL in this case is inaccurate. To fix this issue, remove this check and add relevant logic for when df->governor is NULL. Fixes: 483d557ee9a3 ("PM / devfreq: Clean up the devfreq instance name in sysfs attr") Co-developed-by: Choi Chanwoo Signed-off-by: Yaxiong Tian Signed-off-by: Chanwoo Choi Link: https://lore.kernel.org/all/20260430032035.75496-1-tianyaxiong@kylinos.cn/

PM / devfreq: event: rockchip-dfi: Fix missing clk_disable_unprepare() on error

2026-04-29T22:38:34+00:00

Smatch reports: drivers/devfreq/event/rockchip-dfi.c:215 rockchip_dfi_enable() warn: 'dfi->clk' from clk_prepare_enable() not released. If rockchip_dfi_ddrtype_to_ctrl() fails after clk_prepare_enable(), the clock is not disabled, leading to a resource leak. Add clk_disable_unprepare() in the error path to properly release the clock. Fixes: d724f4a4581b ("PM / devfreq: rockchip-dfi: Prepare for multiple users") Signed-off-by: Anas Iqbal Signed-off-by: Chanwoo Choi Link: https://lore.kernel.org/lkml/20260319163011.18876-1-mohd.abd.6602@gmail.com/

PM / devfreq: Change devfreq_event_class to a const struct

2026-04-29T22:38:27+00:00

The class_create() call has been deprecated in favor of class_register() as the driver core now allows for a struct class to be in read-only memory. Change devfreq_event_class to be a const struct class and drop the class_create() call. Compile tested. Suggested-by: Greg Kroah-Hartman Signed-off-by: Jori Koolstra Signed-off-by: Chanwoo Choi Link: https://patchwork.kernel.org/project/linux-pm/patch/20260401165519.3842485-1-jkoolstra@xs4all.nl/

PM / devfreq: Optimize error return value of governor_show()

2026-04-29T22:06:44+00:00

When df->governor is NULL, governor_show() returns -EINVAL, which confuses users. To fix this issue, return -ENOENT to indicate that no governor is currently set for the device. Signed-off-by: Yaxiong Tian Signed-off-by: Chanwoo Choi Link: https://patchwork.kernel.org/project/linux-pm/patch/20260401033128.67925-1-tianyaxiong@kylinos.cn/

PM / devfreq: Fix available_governors_show() when no governor is set

2026-04-29T21:47:06+00:00

Since devfreq_remove_governor() may clear the device's current governor in certain situations, while governors actually exist independently of the device, directly returning EINVAL in this case is inaccurate. To fix this issue, remove this check and use df->governor for validity verification in the following code. Fixes: 483d557ee9a3 ("PM / devfreq: Clean up the devfreq instance name in sysfs attr") Signed-off-by: Yaxiong Tian Reviewed-by: Jie Zhan Signed-off-by: Chanwoo Choi Link: https://patchwork.kernel.org/project/linux-pm/patch/20260401033055.67608-1-tianyaxiong@kylinos.cn/

PM / devfreq: Fix possible null pointer issue in devfreq_add_governor()

2026-04-29T21:47:05+00:00

When a user removes a governor using devfreq_remove_governor(), if the current device is using this governor, devfreq->governor will be set to NULL. When the user registers any governor using devfreq_add_governor(), since devfreq->governor is NULL, a null pointer error occurs in strncmp(). For example: A user loads the userspace gov through a module, then a device selects userspace. When unloading the userspace module and then loading it again, the null pointer error occurs: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 Mem abort info: ESR = 0x0000000096000004 EC = 0x25: DABT (current EL), IL = 32 bits *******************skip ********************* Call trace: __pi_strncmp+0x20/0x1b8 devfreq_userspace_init+0x1c/0xff8 [governor_userspace] do_one_initcall+0x4c/0x278 do_init_module+0x5c/0x218 load_module+0x1f1c/0x1fc8 init_module_from_file+0x8c/0xd0 __arm64_sys_finit_module+0x220/0x3d8 invoke_syscall+0x48/0x110 el0_svc_common.constprop.0+0xbc/0xe8 do_el0_svc+0x20/0x30 el0_svc+0x24/0xb8 el0t_64_sync_handler+0xb8/0xc0 el0t_64_sync+0x14c/0x150 To fix this issue, remove the list_for_each_entry() logic, as find_devfreq_governor() has already checked for the existence of governor with the same name. This makes it impossible to find a duplicate governor in the list, so the subsequent logic is unreachable and can be removed. Fixes: 1b5c1be2c88e ("PM / devfreq: map devfreq drivers to governor using name") Signed-off-by: Yaxiong Tian Co-developed-by: Jie Zhan Signed-off-by: Jie Zhan Signed-off-by: Chanwoo Choi Link: https://patchwork.kernel.org/project/linux-pm/patch/20260401033046.67482-1-tianyaxiong@kylinos.cn/

PM / devfreq: tegra30-devfreq: add support for Tegra114

2026-04-03T18:15:39+00:00

Lets add Tegra114 support to activity monitor device as a preparation to upcoming EMC controller support. Signed-off-by: Svyatoslav Ryhel Reviewed-by: Mikko Perttunen Acked-by: Dmitry Osipenko Acked-by: MyungJoo Ham Signed-off-by: Chanwoo Choi Link: https://lore.kernel.org/lkml/20260126185423.77786-1-clamor95@gmail.com/