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97ea1906b3
Support configuration of ext_wakeup sources. This patch makes it possible to enable ext_wakeup and set it's polarity, depending on board configuration. AM335x's dedicated PMIC (tps65217) uses ext_wakeup to notify about power-button presses. Handling power-button presses enables to recover from RTC-only power states correctly. Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
55 lines
1.6 KiB
Plaintext
55 lines
1.6 KiB
Plaintext
TI Real Time Clock
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Required properties:
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- compatible:
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- "ti,da830-rtc" - for RTC IP used similar to that on DA8xx SoC family.
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- "ti,am3352-rtc" - for RTC IP used similar to that on AM335x SoC family.
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This RTC IP has special WAKE-EN Register to enable
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Wakeup generation for event Alarm. It can also be
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used to control an external PMIC via the
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pmic_power_en pin.
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- "ti,am4372-rtc" - for RTC IP used similar to that on AM437X SoC family.
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- reg: Address range of rtc register set
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- interrupts: rtc timer, alarm interrupts in order
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- interrupt-parent: phandle for the interrupt controller
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Optional properties:
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- system-power-controller: whether the rtc is controlling the system power
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through pmic_power_en
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- clocks: Any internal or external clocks feeding in to rtc
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- clock-names: Corresponding names of the clocks
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- pinctrl-0: a phandle pointing to the pin settings for the device
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- pinctrl-names: should be "default"
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Optional subnodes:
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- generic pinctrl node
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Required pinctrl subnodes properties:
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- pins - Names of ext_wakeup pins to configure
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Optional pinctrl subnodes properties:
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- input-enable - Enables ext_wakeup
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- ti,active-high - Set input active high (by default active low)
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Example:
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rtc@1c23000 {
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compatible = "ti,da830-rtc";
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reg = <0x23000 0x1000>;
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interrupts = <19
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19>;
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interrupt-parent = <&intc>;
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system-power-controller;
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clocks = <&clk_32k_rtc>, <&clk_32768_ck>;
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clock-names = "ext-clk", "int-clk";
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pinctrl-0 = <&ext_wakeup>;
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pinctrl-names = "default";
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ext_wakeup: ext-wakeup {
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pins = "ext_wakeup0";
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input-enable;
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ti,active-high;
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};
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};
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