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rockchip/soc/drivers: Add DTPM description for rk3399

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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: Daniel 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
This commit is contained in:
Daniel Lezcano 2022-01-28 17:35:37 +01:00
parent e446556173
commit b9d6c47a2b
3 changed files with 68 additions and 0 deletions
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8
drivers/soc/rockchip/Kconfig
View File

@ -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

1
drivers/soc/rockchip/Makefile
View File

@ -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

59
drivers/soc/rockchip/dtpm.c Normal file
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@ -0,0 +1,59 @@
// 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");