2b328421e4
Detailed description for this pull request: 1. Update devfreq core - Check NULL governor in available_governors_show sysfs in order to prevent showing the wrong governor information. - Fix the race condition between devfreq_update_status() and trans_stat_show() - Add new 'interrupt-driven' flag for devfreq goveror. Each devfreq driver can add the their own governor (NIVIDIA Tegra30 ACTMON governor) which is interrupt-driven governor. It needs to use the following sysfs interface to get the new polling interval in order to change the NVIDIA Tegra30 hardware's polling interval. : /sys/class/devfreq/devfreqX/polling_interval So, if 'interrupt-driven' flag of devfreq governor is 1, the devfreq governor is able to use the 'polling_interval' sysfs interface to get the new polling interval value. But, the devfreq core doesn't schedule out the polling work for this governor like NVIDIA Tegra30 ACTMON governor. 2. Update devfreq driver - For exynos-bus.c, remove unused property from dt-binding documentation - For tegra30-devfreq.c, update the internal behavior like fixing the overflow integer issue and clean-up code. 3. Update devfreq-event driver - For exynos-ppmu.c, add exynos_ppmu.h dt-binding file for 'event-data-type' filed. and update dt-binging documentation. Also, Fix minor coding style. -----BEGIN PGP SIGNATURE----- iQJKBAABCgA0FiEEsSpuqBtbWtRe4rLGnM3fLN7rz1MFAl3DkgMWHGN3MDAuY2hv aUBzYW1zdW5nLmNvbQAKCRCczd8s3uvPU++zD/9sQWoJCap6a8sill+P1gXB0IJw cPu4U35tUag6CphuT6DYRpljXQGTGLhUriP8xJ5RP2BNgMzqhPzlI+CiODgoJZvv PfimRi9KBK4ayavKYt3OI6t+O4ULihoglPHUuc2F4o1jPPUAki7Y82ihTzBlZ+U8 702fsibivKPP3c2rSugo3cfO5E/Pb4ITSOWTnuoEEsSV3TfbcH6ThK2Cisu5SY83 XgQIs+G0FWRJZj/TCEghcq43Ccgac1njS+Wat7RqeC29vjGxxsUGo+TBo5CLSgWl FeD9W6DzNwA6dv7SNetYUPQRycZydty8ItmvZP6Y2o/eLIiqePcjcxfAFlxcQAQA qbwRMIsZRlYZ3ZeIJkhAJnkbYNalHuRU3QPPAEtIgnzabJqWYeVoY2nvYzh8nr6F 2ksCY2ufqcAjuXxoiRbj4PvMWJhdeKMyIuP9NGKIhqAc749MjexoZz0+gl4dD56X k9d94WV8NwRMguWr7UNuiLQIqAYJeQJta4V5yT6qnxmBhVuSuYPNzcHaGS6Sh05a JTjCsb6y5jM5fakvktAPdj2JE4ie7Dxuwf8YuYmXdY0sWskAY6vauGL7g2JrM56R GfQW8tsa0G2iPEzX8gnuH2k+tBLO8NnctC01iKm7W4S2epMB8uGDzHob9jSk3hq4 5NwbEVDWuKMlKfJY4Q== =LMM9 -----END PGP SIGNATURE----- Merge tag 'devfreq-next-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux Pull devfreq updates for v5.5 from Chanwoo Choi: "1. Update devfreq core - Check NULL governor in available_governors_show sysfs in order to prevent showing wrong governor information. - Fix race condition between devfreq_update_status() and trans_stat_show() - Add new 'interrupt-driven' flag for devfreq goveroris. Each devfreq driver can add their own interrupt-driven governor (NIVIDIA Tegra30 ACTMON governor). It needs to use the following sysfs interface to get the new polling interval in order to change the NVIDIA Tegra30 hardware's polling interval. : /sys/class/devfreq/devfreqX/polling_interval So, if 'interrupt-driven' flag of devfreq governor is 1, the devfreq governor is able to use the 'polling_interval' sysfs interface to get the new polling interval value. But, the devfreq core doesn't schedule out the polling work for this governor like NVIDIA Tegra30 ACTMON governor. 2. Update devfreq drivers - For exynos-bus.c, remove unused property from dt-binding documentation - For tegra30-devfreq.c, update the internal behavior like fixing the overflow integer issue and clean-up code. 3. Update devfreq-event driver - For exynos-ppmu.c, add exynos_ppmu.h dt-binding file for 'event-data-type' filed. and update dt-binging documentation. Also, Fix minor coding style." * tag 'devfreq-next-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux: (25 commits) PM / devfreq: tegra30: Tune up MCCPU boost-down coefficient PM / devfreq: tegra30: Support variable polling interval PM / devfreq: Add new interrupt_driven flag for governors PM / devfreq: tegra30: Use kHz units for dependency threshold PM / devfreq: tegra30: Disable consecutive interrupts when appropriate PM / devfreq: tegra30: Don't enable already enabled consecutive interrupts PM / devfreq: tegra30: Include appropriate header PM / devfreq: tegra30: Constify structs PM / devfreq: tegra30: Don't enable consecutive-down interrupt on startup PM / devfreq: tegra30: Reset boosting on startup PM / devfreq: tegra30: Move clk-notifier's registration to governor's start PM / devfreq: tegra30: Use CPUFreq notifier PM / devfreq: tegra30: Use kHz units uniformly in the code PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out PM / devfreq: tegra30: Drop write-barrier PM / devfreq: tegra30: Handle possible round-rate error PM / devfreq: tegra30: Keep interrupt disabled while governor is stopped PM / devfreq: tegra30: Change irq type to unsigned int PM / devfreq: exynos-ppmu: remove useless assignment PM / devfreq: Lock devfreq in trans_stat_show ... |
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README
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.