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author | Daniel Lezcano <daniel.lezcano@linaro.org> | 2022-01-28 17:35:37 +0100 |
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committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2022-02-04 17:38:09 +0100 |
commit | b9d6c47a2be8d273ecc063afda6e9fd66a35116d (patch) | |
tree | d4524ba4e5383247a886237750f05f7307b0f4fc /drivers/soc/rockchip | |
parent | e446556173170e675a7a321e76ce5fa3587de724 (diff) | |
download | linux-stable-b9d6c47a2be8d273ecc063afda6e9fd66a35116d.tar.gz linux-stable-b9d6c47a2be8d273ecc063afda6e9fd66a35116d.tar.bz2 linux-stable-b9d6c47a2be8d273ecc063afda6e9fd66a35116d.zip |
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: 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
Diffstat (limited to 'drivers/soc/rockchip')
-rw-r--r-- | drivers/soc/rockchip/Kconfig | 8 | ||||
-rw-r--r-- | drivers/soc/rockchip/Makefile | 1 | ||||
-rw-r--r-- | drivers/soc/rockchip/dtpm.c | 59 |
3 files changed, 68 insertions, 0 deletions
diff --git a/drivers/soc/rockchip/Kconfig b/drivers/soc/rockchip/Kconfig index 25eb2c1e31bb..156ac0e0c8fe 100644 --- a/drivers/soc/rockchip/Kconfig +++ b/drivers/soc/rockchip/Kconfig @@ -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 diff --git a/drivers/soc/rockchip/Makefile b/drivers/soc/rockchip/Makefile index 875032f7344e..05f31a4e743c 100644 --- a/drivers/soc/rockchip/Makefile +++ b/drivers/soc/rockchip/Makefile @@ -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 diff --git a/drivers/soc/rockchip/dtpm.c b/drivers/soc/rockchip/dtpm.c new file mode 100644 index 000000000000..ebebb748488b --- /dev/null +++ b/drivers/soc/rockchip/dtpm.c @@ -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"); |