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authorDaniel Lezcano <daniel.lezcano@linaro.org>2022-01-28 19:35:37 +0300
committerDaniel Lezcano <daniel.lezcano@linaro.org>2022-02-04 19:38:09 +0300
commitb9d6c47a2be8d273ecc063afda6e9fd66a35116d (patch)
treed4524ba4e5383247a886237750f05f7307b0f4fc /drivers/soc/rockchip
parente446556173170e675a7a321e76ce5fa3587de724 (diff)
downloadlinux-b9d6c47a2be8d273ecc063afda6e9fd66a35116d.tar.xz
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/Kconfig8
-rw-r--r--drivers/soc/rockchip/Makefile1
-rw-r--r--drivers/soc/rockchip/dtpm.c59
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");