1 Texas Instruments TWL family (twl4030) reset a 1 Texas Instruments TWL family (twl4030) reset and power management module
2 2
3 The power management module inside the TWL fam 3 The power management module inside the TWL family provides several facilities
4 to control the power resources, including powe 4 to control the power resources, including power scripts. For now, the
5 binding only supports the complete shutdown of 5 binding only supports the complete shutdown of the system after poweroff.
6 6
7 Required properties: 7 Required properties:
8 - compatible : must be one of the following 8 - compatible : must be one of the following
9 "ti,twl4030-power" 9 "ti,twl4030-power"
10 "ti,twl4030-power-reset" 10 "ti,twl4030-power-reset"
11 "ti,twl4030-power-idle" 11 "ti,twl4030-power-idle"
12 "ti,twl4030-power-idle-osc-off" 12 "ti,twl4030-power-idle-osc-off"
13 13
14 The use of ti,twl4030-power-reset is recommend 14 The use of ti,twl4030-power-reset is recommended at least on
15 3530 that needs a special configuration for wa 15 3530 that needs a special configuration for warm reset to work.
16 16
17 When using ti,twl4030-power-idle, the TI recom 17 When using ti,twl4030-power-idle, the TI recommended configuration
18 for idle modes is loaded to the tlw4030 PMIC. 18 for idle modes is loaded to the tlw4030 PMIC.
19 19
20 When using ti,twl4030-power-idle-osc-off, the 20 When using ti,twl4030-power-idle-osc-off, the TI recommended
21 configuration is used with the external oscill 21 configuration is used with the external oscillator being shut
22 down during off-idle. Note that this does not 22 down during off-idle. Note that this does not work on all boards
23 depending on how the external oscillator is wi 23 depending on how the external oscillator is wired.
24 24
25 Optional properties: 25 Optional properties:
26 26
27 - ti,system-power-controller: This indicates t 27 - ti,system-power-controller: This indicates that TWL4030 is the
28 power supply master of the system. With this 28 power supply master of the system. With this flag, the chip will
29 initiate an ACTIVE-to-OFF or SLEEP-to-OFF tr 29 initiate an ACTIVE-to-OFF or SLEEP-to-OFF transition when the
30 system poweroffs. 30 system poweroffs.
31 31
32 - ti,use_poweroff: Deprecated name for ti,syst 32 - ti,use_poweroff: Deprecated name for ti,system-power-controller
33 33
34 Example: 34 Example:
35 &i2c1 { 35 &i2c1 {
36 clock-frequency = <2600000>; 36 clock-frequency = <2600000>;
37 37
38 twl: twl@48 { 38 twl: twl@48 {
39 reg = <0x48>; 39 reg = <0x48>;
40 interrupts = <7>; /* SYS_NIRQ 40 interrupts = <7>; /* SYS_NIRQ cascaded to intc */
41 interrupt-parent = <&intc>; 41 interrupt-parent = <&intc>;
42 42
43 twl_power: power { 43 twl_power: power {
44 compatible = "ti,twl40 44 compatible = "ti,twl4030-power";
45 ti,use_poweroff; 45 ti,use_poweroff;
46 }; 46 };
47 }; 47 };
48 }; 48 };
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