forked from Minki/linux
ef8006846a
- Update the PM-runtime framework to use ktime instead of jiffies for accounting (Thara Gopinath, Vincent Guittot). - Optimize the autosuspend code in the PM-runtime framework somewhat (Ladislav Michl). - Add a PM core flag to mark devices that don't need any form of power management (Sudeep Holla). - Introduce driver API documentation for cpuidle and add a new cpuidle governor for tickless systems (Rafael Wysocki). - Add Jacobsville support to the intel_idle driver (Zhang Rui). - Clean up a cpuidle core header file and the cpuidle-dt and ACPI processor-idle drivers (Yangtao Li, Joseph Lo, Yazen Ghannam). - Add new cpufreq driver for Armada 8K (Gregory Clement). - Fix and clean up cpufreq core (Rafael Wysocki, Viresh Kumar, Amit Kucheria). - Add support for light-weight tear-down and bring-up of CPUs to the cpufreq core and use it in the cpufreq-dt driver (Viresh Kumar). - Fix cpu_cooling Kconfig dependencies, add support for CPU cooling auto-registration to the cpufreq core and use it in multiple cpufreq drivers (Amit Kucheria). - Fix some minor issues and do some cleanups in the davinci, e_powersaver, ap806, s5pv210, qcom and kryo cpufreq drivers (Bartosz Golaszewski, Gustavo Silva, Julia Lawall, Paweł Chmiel, Taniya Das, Viresh Kumar). - Add a Hisilicon CPPC quirk to the cppc_cpufreq driver (Xiongfeng Wang). - Clean up the intel_pstate and acpi-cpufreq drivers (Erwan Velu, Rafael Wysocki). - Clean up multiple cpufreq drivers (Yangtao Li). - Update cpufreq-related MAINTAINERS entries (Baruch Siach, Lukas Bulwahn). - Add support for exposing the Energy Model via debugfs and make multiple cpufreq drivers register an Energy Model to support energy-aware scheduling (Quentin Perret, Dietmar Eggemann, Matthias Kaehlcke). - Add Ice Lake mobile and Jacobsville support to the Intel RAPL power-capping driver (Gayatri Kammela, Zhang Rui). - Add a power estimation helper to the operating performance points (OPP) framework and clean up a core function in it (Quentin Perret, Viresh Kumar). - Make minor improvements in the generic power domains (genpd), OPP and system suspend frameworks and in the PM core (Aditya Pakki, Douglas Anderson, Greg Kroah-Hartman, Rafael Wysocki, Yangtao Li). -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABCAAGBQJcfSGlAAoJEILEb/54YlRxikwP/1rQ9+HqDmDUvO2QeYREGO/m R4kK+iUQW7O4ZJzsSvoGyuKCl7c2ANPlJWmbsEZKbevpKZ4XuUcv/CJDqKD1izV7 hfsQyum34ePSCUEMf6CpMAGAkdmK//NVysHiLXZ4j1hhzi6gA6Cm50qyNZ8xX6kF Ri6zYG5x7nhn/o/l569FDe+K5W/LDDaZUmvr858pPsrZZR5c4p3ylq+HBrZt0FPQ 70D+u7RcT5v3DQLTghNrgHHiOJ0/DQM43I7aZvkKM3JA8BCDou/Nvq+gH0C0YUP0 QE+oFK9C8CBPEz9N9cSMTb0+S78GQNB0GntJPDN3QQFCHRe6EYKUtu6CvllIE1v9 5pFfagXGVi9UmShu80v+qGGUILVK1ZJ5fjSyxx4UcneTsarNJZg7Y7d72mrX+0zi J3KodcqQi295jNq9P55K/9XtAiRdpRR6bQzXBtrprpw8PA94yqBHPpxbD32Wl05/ U2+ss/SNyMAzhsP9kqzxSxPBlTFek/ArxZm0Uk4kHt75gkl09CG64r+6OG8gLtwD Skkr02AeYvx6fx0kFnKIS4sc2c2/8xW3FUtHlv+TDPvuzCEaL0ooqsWgt7rcwlmg Xz5ufXbEIiVSlLlH/YGZxbgy+WfIzYA5WMpYrA1Givn8s5jI9Sm+ROD2qhOKA2n4 aekEDkum/bxVVeykZaXy =TSKG -----END PGP SIGNATURE----- Merge tag 'pm-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management updates from Rafael Wysocki: "These are PM-runtime framework changes to use ktime instead of jiffies for accounting, new PM core flag to mark devices that don't need any form of power management, cpuidle updates including driver API documentation and a new governor, cpufreq updates including a new driver for Armada 8K, thermal cleanups and more, some energy-aware scheduling (EAS) enabling changes, new chips support in the intel_idle and RAPL drivers and assorted cleanups in some other places. Specifics: - Update the PM-runtime framework to use ktime instead of jiffies for accounting (Thara Gopinath, Vincent Guittot) - Optimize the autosuspend code in the PM-runtime framework somewhat (Ladislav Michl) - Add a PM core flag to mark devices that don't need any form of power management (Sudeep Holla) - Introduce driver API documentation for cpuidle and add a new cpuidle governor for tickless systems (Rafael Wysocki) - Add Jacobsville support to the intel_idle driver (Zhang Rui) - Clean up a cpuidle core header file and the cpuidle-dt and ACPI processor-idle drivers (Yangtao Li, Joseph Lo, Yazen Ghannam) - Add new cpufreq driver for Armada 8K (Gregory Clement) - Fix and clean up cpufreq core (Rafael Wysocki, Viresh Kumar, Amit Kucheria) - Add support for light-weight tear-down and bring-up of CPUs to the cpufreq core and use it in the cpufreq-dt driver (Viresh Kumar) - Fix cpu_cooling Kconfig dependencies, add support for CPU cooling auto-registration to the cpufreq core and use it in multiple cpufreq drivers (Amit Kucheria) - Fix some minor issues and do some cleanups in the davinci, e_powersaver, ap806, s5pv210, qcom and kryo cpufreq drivers (Bartosz Golaszewski, Gustavo Silva, Julia Lawall, Paweł Chmiel, Taniya Das, Viresh Kumar) - Add a Hisilicon CPPC quirk to the cppc_cpufreq driver (Xiongfeng Wang) - Clean up the intel_pstate and acpi-cpufreq drivers (Erwan Velu, Rafael Wysocki) - Clean up multiple cpufreq drivers (Yangtao Li) - Update cpufreq-related MAINTAINERS entries (Baruch Siach, Lukas Bulwahn) - Add support for exposing the Energy Model via debugfs and make multiple cpufreq drivers register an Energy Model to support energy-aware scheduling (Quentin Perret, Dietmar Eggemann, Matthias Kaehlcke) - Add Ice Lake mobile and Jacobsville support to the Intel RAPL power-capping driver (Gayatri Kammela, Zhang Rui) - Add a power estimation helper to the operating performance points (OPP) framework and clean up a core function in it (Quentin Perret, Viresh Kumar) - Make minor improvements in the generic power domains (genpd), OPP and system suspend frameworks and in the PM core (Aditya Pakki, Douglas Anderson, Greg Kroah-Hartman, Rafael Wysocki, Yangtao Li)" * tag 'pm-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (80 commits) cpufreq: kryo: Release OPP tables on module removal cpufreq: ap806: add missing of_node_put after of_device_is_available cpufreq: acpi-cpufreq: Report if CPU doesn't support boost technologies cpufreq: Pass updated policy to driver ->setpolicy() callback cpufreq: Fix two debug messages in cpufreq_set_policy() cpufreq: Reorder and simplify cpufreq_update_policy() cpufreq: Add kerneldoc comments for two core functions PM / core: Add support to skip power management in device/driver model cpufreq: intel_pstate: Rework iowait boosting to be less aggressive cpufreq: intel_pstate: Eliminate intel_pstate_get_base_pstate() cpufreq: intel_pstate: Avoid redundant initialization of local vars powercap/intel_rapl: add Ice Lake mobile ACPI / processor: Set P_LVL{2,3} idle state descriptions cpufreq / cppc: Work around for Hisilicon CPPC cpufreq ACPI / CPPC: Add a helper to get desired performance cpufreq: davinci: move configuration to include/linux/platform_data cpufreq: speedstep: convert BUG() to BUG_ON() cpufreq: powernv: fix missing check of return value in init_powernv_pstates() cpufreq: longhaul: remove unneeded semicolon cpufreq: pcc-cpufreq: remove unneeded semicolon ..
174 lines
3.9 KiB
C
174 lines
3.9 KiB
C
/*
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* Tegra 124 cpufreq driver
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pm_opp.h>
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#include <linux/types.h>
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struct tegra124_cpufreq_priv {
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struct clk *cpu_clk;
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struct clk *pllp_clk;
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struct clk *pllx_clk;
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struct clk *dfll_clk;
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struct platform_device *cpufreq_dt_pdev;
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};
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static int tegra124_cpu_switch_to_dfll(struct tegra124_cpufreq_priv *priv)
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{
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struct clk *orig_parent;
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int ret;
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ret = clk_set_rate(priv->dfll_clk, clk_get_rate(priv->cpu_clk));
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if (ret)
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return ret;
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orig_parent = clk_get_parent(priv->cpu_clk);
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clk_set_parent(priv->cpu_clk, priv->pllp_clk);
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ret = clk_prepare_enable(priv->dfll_clk);
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if (ret)
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goto out;
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clk_set_parent(priv->cpu_clk, priv->dfll_clk);
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return 0;
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out:
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clk_set_parent(priv->cpu_clk, orig_parent);
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return ret;
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}
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static int tegra124_cpufreq_probe(struct platform_device *pdev)
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{
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struct tegra124_cpufreq_priv *priv;
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struct device_node *np;
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struct device *cpu_dev;
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struct platform_device_info cpufreq_dt_devinfo = {};
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int ret;
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priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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cpu_dev = get_cpu_device(0);
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if (!cpu_dev)
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return -ENODEV;
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np = of_cpu_device_node_get(0);
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if (!np)
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return -ENODEV;
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priv->cpu_clk = of_clk_get_by_name(np, "cpu_g");
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if (IS_ERR(priv->cpu_clk)) {
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ret = PTR_ERR(priv->cpu_clk);
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goto out_put_np;
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}
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priv->dfll_clk = of_clk_get_by_name(np, "dfll");
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if (IS_ERR(priv->dfll_clk)) {
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ret = PTR_ERR(priv->dfll_clk);
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goto out_put_cpu_clk;
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}
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priv->pllx_clk = of_clk_get_by_name(np, "pll_x");
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if (IS_ERR(priv->pllx_clk)) {
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ret = PTR_ERR(priv->pllx_clk);
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goto out_put_dfll_clk;
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}
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priv->pllp_clk = of_clk_get_by_name(np, "pll_p");
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if (IS_ERR(priv->pllp_clk)) {
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ret = PTR_ERR(priv->pllp_clk);
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goto out_put_pllx_clk;
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}
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ret = tegra124_cpu_switch_to_dfll(priv);
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if (ret)
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goto out_put_pllp_clk;
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cpufreq_dt_devinfo.name = "cpufreq-dt";
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cpufreq_dt_devinfo.parent = &pdev->dev;
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priv->cpufreq_dt_pdev =
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platform_device_register_full(&cpufreq_dt_devinfo);
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if (IS_ERR(priv->cpufreq_dt_pdev)) {
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ret = PTR_ERR(priv->cpufreq_dt_pdev);
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goto out_put_pllp_clk;
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}
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platform_set_drvdata(pdev, priv);
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of_node_put(np);
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return 0;
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out_put_pllp_clk:
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clk_put(priv->pllp_clk);
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out_put_pllx_clk:
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clk_put(priv->pllx_clk);
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out_put_dfll_clk:
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clk_put(priv->dfll_clk);
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out_put_cpu_clk:
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clk_put(priv->cpu_clk);
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out_put_np:
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of_node_put(np);
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return ret;
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}
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static struct platform_driver tegra124_cpufreq_platdrv = {
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.driver.name = "cpufreq-tegra124",
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.probe = tegra124_cpufreq_probe,
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};
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static int __init tegra_cpufreq_init(void)
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{
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int ret;
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struct platform_device *pdev;
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if (!(of_machine_is_compatible("nvidia,tegra124") ||
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of_machine_is_compatible("nvidia,tegra210")))
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return -ENODEV;
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/*
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* Platform driver+device required for handling EPROBE_DEFER with
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* the regulator and the DFLL clock
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*/
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ret = platform_driver_register(&tegra124_cpufreq_platdrv);
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if (ret)
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return ret;
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pdev = platform_device_register_simple("cpufreq-tegra124", -1, NULL, 0);
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if (IS_ERR(pdev)) {
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platform_driver_unregister(&tegra124_cpufreq_platdrv);
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return PTR_ERR(pdev);
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}
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return 0;
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}
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module_init(tegra_cpufreq_init);
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MODULE_AUTHOR("Tuomas Tynkkynen <ttynkkynen@nvidia.com>");
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MODULE_DESCRIPTION("cpufreq driver for NVIDIA Tegra124");
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MODULE_LICENSE("GPL v2");
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