Commit b9d6c47a authored by Daniel Lezcano's avatar Daniel Lezcano
Browse files

rockchip/soc/drivers: Add DTPM description for rk3399 



The DTPM framework does support now the hierarchy description.

The platform specific code can call the hierarchy creation function
with an array of struct dtpm_node pointing to their parent.

This patch provides a description of the big / Little CPUs and the
GPU and tie them together under a virtual 'package' name. Only rk3399 is
described now.

The description could be extended in the future with the memory
controller with devfreq.

The description is always a module and it describes the soft
dependencies. The userspace has to load the softdeps module in the
right order.

Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by; Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20220128163537.212248-6-daniel.lezcano@linaro.org
parent e4465561

drivers/soc/rockchip/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -34,4 +34,12 @@ config ROCKCHIP_PM_DOMAINS 


          If unsure, say N.



config ROCKCHIP_DTPM

	tristate "Rockchip DTPM hierarchy"

	depends on DTPM && m

	help

	 Describe the hierarchy for the Dynamic Thermal Power

	 Management tree on this platform. That will create all the

	 power capping capable devices.



endif

drivers/soc/rockchip/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -5,3 +5,4 @@ 
obj-$(CONFIG_ROCKCHIP_GRF) += grf.o

obj-$(CONFIG_ROCKCHIP_IODOMAIN) += io-domain.o

obj-$(CONFIG_ROCKCHIP_PM_DOMAINS) += pm_domains.o

obj-$(CONFIG_ROCKCHIP_DTPM) += dtpm.o

drivers/soc/rockchip/dtpm.c

0 → 100644
+59 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright 2021 Linaro Limited

 *

 * Author: Daniel Lezcano <daniel.lezcano@linaro.org>

 *

 * DTPM hierarchy description

 */

#include <linux/dtpm.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>



static struct dtpm_node __initdata rk3399_hierarchy[] = {

	[0]{ .name = "rk3399",

	     .type = DTPM_NODE_VIRTUAL },

	[1]{ .name = "package",

	     .type = DTPM_NODE_VIRTUAL,

	     .parent = &rk3399_hierarchy[0] },

	[2]{ .name = "/cpus/cpu@0",

	     .type = DTPM_NODE_DT,

	     .parent = &rk3399_hierarchy[1] },

	[3]{ .name = "/cpus/cpu@1",

	     .type = DTPM_NODE_DT,

	     .parent = &rk3399_hierarchy[1] },

	[4]{ .name = "/cpus/cpu@2",

	     .type = DTPM_NODE_DT,

	     .parent = &rk3399_hierarchy[1] },

	[5]{ .name = "/cpus/cpu@3",

	     .type = DTPM_NODE_DT,

	     .parent = &rk3399_hierarchy[1] },

	[6]{ .name = "/cpus/cpu@100",

	     .type = DTPM_NODE_DT,

	     .parent = &rk3399_hierarchy[1] },

	[7]{ .name = "/cpus/cpu@101",

	     .type = DTPM_NODE_DT,

	     .parent = &rk3399_hierarchy[1] },

	[8]{ .name = "/gpu@ff9a0000",

	     .type = DTPM_NODE_DT,

	     .parent = &rk3399_hierarchy[1] },

	[9]{ /* sentinel */ }

};



static struct of_device_id __initdata rockchip_dtpm_match_table[] = {

        { .compatible = "rockchip,rk3399", .data = rk3399_hierarchy },

        {},

};



static int __init rockchip_dtpm_init(void)

{

	return dtpm_create_hierarchy(rockchip_dtpm_match_table);

}

module_init(rockchip_dtpm_init);



MODULE_SOFTDEP("pre: panfrost cpufreq-dt");

MODULE_DESCRIPTION("Rockchip DTPM driver");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:dtpm");

MODULE_AUTHOR("Daniel Lezcano <daniel.lezcano@kernel.org");