drivers/soc/rockchip/dtpm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2021 Linaro Limited
   4  *
   5  * Author: Daniel Lezcano <[email protected]>
   6  *
   7  * DTPM hierarchy description
   8  */
   9 #include <linux/dtpm.h>
  10 #include <linux/module.h>
  11 #include <linux/of.h>
  12 #include <linux/platform_device.h>
  13
  14 static struct dtpm_node __initdata rk3399_hierarchy[] = {
  15         [0] = { .name = "rk3399",
  16                 .type = DTPM_NODE_VIRTUAL },
  17         [1] = { .name = "package",
  18                 .type = DTPM_NODE_VIRTUAL,
  19                 .parent = &rk3399_hierarchy[0] },
  20         [2] = { .name = "/cpus/cpu@0",
  21                 .type = DTPM_NODE_DT,
  22                 .parent = &rk3399_hierarchy[1] },
  23         [3] = { .name = "/cpus/cpu@1",
  24                 .type = DTPM_NODE_DT,
  25                 .parent = &rk3399_hierarchy[1] },
  26         [4] = { .name = "/cpus/cpu@2",
  27                 .type = DTPM_NODE_DT,
  28                 .parent = &rk3399_hierarchy[1] },
  29         [5] = { .name = "/cpus/cpu@3",
  30                 .type = DTPM_NODE_DT,
  31                 .parent = &rk3399_hierarchy[1] },
  32         [6] = { .name = "/cpus/cpu@100",
  33                 .type = DTPM_NODE_DT,
  34                 .parent = &rk3399_hierarchy[1] },
  35         [7] = { .name = "/cpus/cpu@101",
  36                 .type = DTPM_NODE_DT,
  37                 .parent = &rk3399_hierarchy[1] },
  38         [8] = { .name = "/gpu@ff9a0000",
  39                 .type = DTPM_NODE_DT,
  40                 .parent = &rk3399_hierarchy[1] },
  41         [9] = { /* sentinel */ }
  42 };
  43
  44 static struct of_device_id __initdata rockchip_dtpm_match_table[] = {
  45         { .compatible = "rockchip,rk3399", .data = rk3399_hierarchy },
  46         {},
  47 };
  48
  49 static int __init rockchip_dtpm_init(void)
  50 {
  51         return dtpm_create_hierarchy(rockchip_dtpm_match_table);
  52 }
  53 module_init(rockchip_dtpm_init);
  54
  55 static void __exit rockchip_dtpm_exit(void)
  56 {
  57         return dtpm_destroy_hierarchy();
  58 }
  59 module_exit(rockchip_dtpm_exit);
  60
  61 MODULE_SOFTDEP("pre: panfrost cpufreq-dt");
  62 MODULE_DESCRIPTION("Rockchip DTPM driver");
  63 MODULE_LICENSE("GPL");
  64 MODULE_ALIAS("platform:dtpm");
  65 MODULE_AUTHOR("Daniel Lezcano <[email protected]");