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Add new property "ti,system-power-controller" to register the RTC as a power-off handler. Some RTC IP revisions can control an external PMIC via the pmic_power_en pin, which can be configured to transition to OFF on ALARM2 events and back to ON on subsequent ALARM (wakealarm) events. This is based on earlier work by Colin Foe-Parker and AnilKumar Ch. [1] [1] https://www.mail-archive.com/linux-omap@vger.kernel.org/msg82127.html [akpm@linux-foundation.org: add comment] Signed-off-by: Johan Hovold <johan@kernel.org> Cc: Colin Foe-Parker <colin.foeparker@logicpd.com> Cc: AnilKumar Ch <anilkumar@ti.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Tony Lindgren <tony@atomide.com> Cc: Benot Cousson <bcousson@baylibre.com> Cc: Lokesh Vutla <lokeshvutla@ti.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Sekhar Nori <nsekhar@ti.com> Cc: Tero Kristo <t-kristo@ti.com> Cc: Keerthy J <j-keerthy@ti.com> Tested-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
29 lines
838 B
Plaintext
29 lines
838 B
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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- 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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- ti,system-power-controller: whether the rtc is controlling the system power
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through pmic_power_en
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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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ti,system-power-controller;
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};
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