diff options
Diffstat (limited to 'roms/u-boot/doc/device-tree-bindings/rtc')
3 files changed, 68 insertions, 0 deletions
diff --git a/roms/u-boot/doc/device-tree-bindings/rtc/abracon,abx80x.txt b/roms/u-boot/doc/device-tree-bindings/rtc/abracon,abx80x.txt new file mode 100644 index 000000000..2405e35a1 --- /dev/null +++ b/roms/u-boot/doc/device-tree-bindings/rtc/abracon,abx80x.txt @@ -0,0 +1,31 @@ +Abracon ABX80X I2C ultra low power RTC/Alarm chip + +The Abracon ABX80X family consist of the ab0801, ab0803, ab0804, ab0805, ab1801, +ab1803, ab1804 and ab1805. The ab0805 is the superset of ab080x and the ab1805 +is the superset of ab180x. + +Required properties: + + - "compatible": should one of: + "abracon,abx80x" + "abracon,ab0801" + "abracon,ab0803" + "abracon,ab0804" + "abracon,ab0805" + "abracon,ab1801" + "abracon,ab1803" + "abracon,ab1804" + "abracon,ab1805" + "microcrystal,rv1805" + Using "abracon,abx80x" will enable chip autodetection. + - "reg": I2C bus address of the device + +Optional properties: + +The abx804 and abx805 have a trickle charger that is able to charge the +connected battery or supercap. Both the following properties have to be defined +and valid to enable charging: + + - "abracon,tc-diode": should be "standard" (0.6V) or "schottky" (0.3V) + - "abracon,tc-resistor": should be <0>, <3>, <6> or <11>. 0 disables the output + resistor, the other values are in kOhm. diff --git a/roms/u-boot/doc/device-tree-bindings/rtc/brcm,brcmstb-waketimer.txt b/roms/u-boot/doc/device-tree-bindings/rtc/brcm,brcmstb-waketimer.txt new file mode 100644 index 000000000..1d990bcc0 --- /dev/null +++ b/roms/u-boot/doc/device-tree-bindings/rtc/brcm,brcmstb-waketimer.txt @@ -0,0 +1,22 @@ +Broadcom STB wake-up Timer + +The Broadcom STB wake-up timer provides a 27Mhz resolution timer, with the +ability to wake up the system from low-power suspend/standby modes. + +Required properties: +- compatible : should contain "brcm,brcmstb-waketimer" +- reg : the register start and length for the WKTMR block +- interrupts : The TIMER interrupt +- interrupt-parent: The phandle to the Always-On (AON) Power Management (PM) L2 + interrupt controller node +- clocks : The phandle to the UPG fixed clock (27Mhz domain) + +Example: + +waketimer@f0411580 { + compatible = "brcm,brcmstb-waketimer"; + reg = <0xf0411580 0x14>; + interrupts = <0x3>; + interrupt-parent = <&aon_pm_l2_intc>; + clocks = <&upg_fixed>; +}; diff --git a/roms/u-boot/doc/device-tree-bindings/rtc/ds3232.txt b/roms/u-boot/doc/device-tree-bindings/rtc/ds3232.txt new file mode 100644 index 000000000..254b7bc3c --- /dev/null +++ b/roms/u-boot/doc/device-tree-bindings/rtc/ds3232.txt @@ -0,0 +1,15 @@ +DS3232 Real-Time Clock with SRAM + +The RTC driver provides time and date functionality. Also read and write +functions are provided that can be used to access the SRAM memory. + +Required properties: +- compatible : should contain "dallas,ds3232" +- reg : the I2C RTC address + +Example: + +rtc@68 { + compatible = "dallas,ds3232"; + reg = <0x68>; +}; |