134 lines
4.7 KiB
Plaintext
134 lines
4.7 KiB
Plaintext
* Exynos Thermal Management Unit (TMU)
|
|
|
|
** Required properties:
|
|
|
|
- compatible : One of the following:
|
|
"samsung,exynos3250-tmu"
|
|
"samsung,exynos4412-tmu"
|
|
"samsung,exynos4210-tmu"
|
|
"samsung,exynos5250-tmu"
|
|
"samsung,exynos5260-tmu"
|
|
"samsung,exynos5420-tmu" for TMU channel 0, 1 on Exynos5420
|
|
"samsung,exynos5420-tmu-ext-triminfo" for TMU channels 2, 3 and 4
|
|
Exynos5420 (Must pass triminfo base and triminfo clock)
|
|
"samsung,exynos5433-tmu"
|
|
"samsung,exynos5440-tmu"
|
|
"samsung,exynos7-tmu"
|
|
- interrupt-parent : The phandle for the interrupt controller
|
|
- reg : Address range of the thermal registers. For soc's which has multiple
|
|
instances of TMU and some registers are shared across all TMU's like
|
|
interrupt related then 2 set of register has to supplied. First set
|
|
belongs to register set of TMU instance and second set belongs to
|
|
registers shared with the TMU instance.
|
|
|
|
NOTE: On Exynos5420, the TRIMINFO register is misplaced for TMU
|
|
channels 2, 3 and 4
|
|
Use "samsung,exynos5420-tmu-ext-triminfo" in cases, there is a misplaced
|
|
register, also provide clock to access that base.
|
|
|
|
TRIMINFO at 0x1006c000 contains data for TMU channel 3
|
|
TRIMINFO at 0x100a0000 contains data for TMU channel 4
|
|
TRIMINFO at 0x10068000 contains data for TMU channel 2
|
|
|
|
- interrupts : Should contain interrupt for thermal system
|
|
- clocks : The main clocks for TMU device
|
|
-- 1. operational clock for TMU channel
|
|
-- 2. optional clock to access the shared registers of TMU channel
|
|
-- 3. optional special clock for functional operation
|
|
- clock-names : Thermal system clock name
|
|
-- "tmu_apbif" operational clock for current TMU channel
|
|
-- "tmu_triminfo_apbif" clock to access the shared triminfo register
|
|
for current TMU channel
|
|
-- "tmu_sclk" clock for functional operation of the current TMU
|
|
channel
|
|
|
|
The Exynos TMU supports generating interrupts when reaching given
|
|
temperature thresholds. Number of supported thermal trip points depends
|
|
on the SoC (only first trip points defined in DT will be configured):
|
|
- most of SoC: 4
|
|
- samsung,exynos5433-tmu: 8
|
|
- samsung,exynos7-tmu: 8
|
|
|
|
Following properties are mandatory (depending on SoC):
|
|
- samsung,tmu_gain: Gain value for internal TMU operation.
|
|
- samsung,tmu_reference_voltage: Value of TMU IP block's reference voltage
|
|
- samsung,tmu_noise_cancel_mode: Mode for noise cancellation
|
|
- samsung,tmu_efuse_value: Default level of temperature - it is needed when
|
|
in factory fusing produced wrong value
|
|
- samsung,tmu_min_efuse_value: Minimum temperature fused value
|
|
- samsung,tmu_max_efuse_value: Maximum temperature fused value
|
|
- samsung,tmu_first_point_trim: First point trimming value
|
|
- samsung,tmu_second_point_trim: Second point trimming value
|
|
- samsung,tmu_default_temp_offset: Default temperature offset
|
|
- samsung,tmu_cal_type: Callibration type
|
|
|
|
** Optional properties:
|
|
|
|
- vtmu-supply: This entry is optional and provides the regulator node supplying
|
|
voltage to TMU. If needed this entry can be placed inside
|
|
board/platform specific dts file.
|
|
|
|
Example 1):
|
|
|
|
tmu@100C0000 {
|
|
compatible = "samsung,exynos4412-tmu";
|
|
interrupt-parent = <&combiner>;
|
|
reg = <0x100C0000 0x100>;
|
|
interrupts = <2 4>;
|
|
clocks = <&clock 383>;
|
|
clock-names = "tmu_apbif";
|
|
status = "disabled";
|
|
vtmu-supply = <&tmu_regulator_node>;
|
|
#include "exynos4412-tmu-sensor-conf.dtsi"
|
|
};
|
|
|
|
Example 2):
|
|
|
|
tmuctrl_0: tmuctrl@160118 {
|
|
compatible = "samsung,exynos5440-tmu";
|
|
reg = <0x160118 0x230>, <0x160368 0x10>;
|
|
interrupts = <0 58 0>;
|
|
clocks = <&clock 21>;
|
|
clock-names = "tmu_apbif";
|
|
#include "exynos5440-tmu-sensor-conf.dtsi"
|
|
};
|
|
|
|
Example 3): (In case of Exynos5420 "with misplaced TRIMINFO register")
|
|
tmu_cpu2: tmu@10068000 {
|
|
compatible = "samsung,exynos5420-tmu-ext-triminfo";
|
|
reg = <0x10068000 0x100>, <0x1006c000 0x4>;
|
|
interrupts = <0 184 0>;
|
|
clocks = <&clock 318>, <&clock 318>;
|
|
clock-names = "tmu_apbif", "tmu_triminfo_apbif";
|
|
#include "exynos4412-tmu-sensor-conf.dtsi"
|
|
};
|
|
|
|
tmu_cpu3: tmu@1006c000 {
|
|
compatible = "samsung,exynos5420-tmu-ext-triminfo";
|
|
reg = <0x1006c000 0x100>, <0x100a0000 0x4>;
|
|
interrupts = <0 185 0>;
|
|
clocks = <&clock 318>, <&clock 319>;
|
|
clock-names = "tmu_apbif", "tmu_triminfo_apbif";
|
|
#include "exynos4412-tmu-sensor-conf.dtsi"
|
|
};
|
|
|
|
tmu_gpu: tmu@100a0000 {
|
|
compatible = "samsung,exynos5420-tmu-ext-triminfo";
|
|
reg = <0x100a0000 0x100>, <0x10068000 0x4>;
|
|
interrupts = <0 215 0>;
|
|
clocks = <&clock 319>, <&clock 318>;
|
|
clock-names = "tmu_apbif", "tmu_triminfo_apbif";
|
|
#include "exynos4412-tmu-sensor-conf.dtsi"
|
|
};
|
|
|
|
Note: For multi-instance tmu each instance should have an alias correctly
|
|
numbered in "aliases" node.
|
|
|
|
Example:
|
|
|
|
aliases {
|
|
tmuctrl0 = &tmuctrl_0;
|
|
tmuctrl1 = &tmuctrl_1;
|
|
tmuctrl2 = &tmuctrl_2;
|
|
};
|