linux/drivers/devfreq, branch v6.17

PM / devfreq: Add HiSilicon uncore frequency scaling driver

2025-07-14T11:23:57Z

Add the HiSilicon uncore frequency scaling driver for Kunpeng SoCs based on the devfreq framework. The uncore domain contains shared computing resources, including system interconnects and L3 cache. The uncore frequency significantly impacts the system-wide performance as well as power consumption. This driver adds support for runtime management of uncore frequency from kernel and userspace. The main function includes setting and getting frequencies, changing frequency scaling policies, and querying the list of CPUs whose performance is significantly related to this uncore frequency domain, etc. The driver communicates with a platform controller through an ACPI PCC mailbox to take the actual actions of frequency scaling. Co-developed-by: Lifeng Zheng Signed-off-by: Lifeng Zheng Reviewed-by: Jonathan Cameron Reviewed-by: Huisong Li Signed-off-by: Jie Zhan Signed-off-by: Chanwoo Choi Link: https://patchwork.kernel.org/project/linux-pm/patch/20250623143401.4095045-3-zhanjie9@hisilicon.com/

PM / devfreq: Allow devfreq driver to add custom sysfs ABIs

2025-07-14T11:22:59Z

Extend the devfreq_dev_profile to allow drivers optionally create device-specific sysfs ABIs together with other common devfreq ABIs under the devfreq device path. Reviewed-by: Jonathan Cameron Reviewed-by: Huisong Li Signed-off-by: Jie Zhan Signed-off-by: Chanwoo Choi Link: https://patchwork.kernel.org/project/linux-pm/patch/20250623143401.4095045-2-zhanjie9@hisilicon.com/

PM / devfreq: sun8i-a33-mbus: Simplify by using more devm functions

2025-07-14T11:04:17Z

Use devm allocators for enabling the bus clock and clk_rate_exclusive_get(). This simplifies error handling and the remove callback. Reviewed-by: Chen-Yu Tsai Signed-off-by: Uwe Kleine-König Tested-by: Corentin LABBE Link: https://patchwork.kernel.org/project/linux-pm/patch/20250513203908.205060-2-u.kleine-koenig@baylibre.com/ Signed-off-by: Chanwoo Choi

PM / devfreq: Fix a index typo in trans_stat

2025-07-14T11:04:17Z

Fixes: 4920ee6dcfaf ("PM / devfreq: Convert to use sysfs_emit_at() API") Signed-off-by: pls Link: https://patchwork.kernel.org/project/linux-pm/patch/20250515143100.17849-1-chanwoo@kernel.org/ Signed-off-by: Chanwoo Choi

PM / devfreq: Check governor before using governor->name

2025-07-14T11:04:17Z

Commit 96ffcdf239de ("PM / devfreq: Remove redundant governor_name from struct devfreq") removes governor_name and uses governor->name to replace it. But devfreq->governor may be NULL and directly using devfreq->governor->name may cause null pointer exception. Move the check of governor to before using governor->name. Fixes: 96ffcdf239de ("PM / devfreq: Remove redundant governor_name from struct devfreq") Signed-off-by: Lifeng Zheng Link: https://lore.kernel.org/lkml/20250421030020.3108405-5-zhenglifeng1@huawei.com/ Signed-off-by: Chanwoo Choi

PM / devfreq: Remove redundant devfreq_get_freq_range() calling in devfreq_add_device()

2025-07-14T11:04:16Z

The calling of devfreq_get_freq_range() in devfreq_add_device() is redundant because min_freq and max_freq are never used. Remove it. Signed-off-by: Lifeng Zheng Link: https://lore.kernel.org/lkml/20250421030020.3108405-4-zhenglifeng1@huawei.com/ Signed-off-by: Chanwoo Choi

PM / devfreq: Limit max_freq with scaling_min_freq

2025-07-14T11:04:16Z

Limit max_freq in devfreq_get_freq_range() with scaling_min_freq to avoid showing an unreachable freq when reading it. Use macro clamp to simplify code. Signed-off-by: Lifeng Zheng Link: https://lore.kernel.org/lkml/20250421030020.3108405-3-zhenglifeng1@huawei.com/ Signed-off-by: Chanwoo Choi

PM / devfreq: governor: Replace sscanf() with kstrtoul() in set_freq_store()

2025-07-14T11:04:16Z

Replace sscanf() with kstrtoul() in set_freq_store() and check the result to avoid invalid input. Signed-off-by: Lifeng Zheng Link: https://lore.kernel.org/lkml/20250421030020.3108405-2-zhenglifeng1@huawei.com/ Signed-off-by: Chanwoo Choi

PM / devfreq: rockchip-dfi: Switch to use hrtimer_setup()

2025-02-18T09:32:34Z

hrtimer_setup() takes the callback function pointer as argument and initializes the timer completely. Replace hrtimer_init() and the open coded initialization of hrtimer::function with the new setup mechanism. Patch was created by using Coccinelle. Signed-off-by: Nam Cao Signed-off-by: Thomas Gleixner Acked-by: Chanwoo Choi Link: https://lore.kernel.org/all/dfb35fb45eacdba7b8767052aa8c29ca157ac1b0.1738746821.git.namcao@linutronix.de

Merge tag 'devfreq-next-for-6.14' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux

2025-01-13T19:48:34Z

Merge devfreq updates for 6.14 from Chanwoo Choi: "- Call of_node_put() only once in devfreq_event_get_edev_by_phandle() on devfreq-event.c - Remove unused function parameter of exynos_bus_parse_of() on exynos-bus.c" * tag 'devfreq-next-for-6.14' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux: PM / devfreq: exynos: remove unused function parameter PM / devfreq: event: Call of_node_put() only once in devfreq_event_get_edev_by_phandle()