Re: [PATCH 1/2] dt-bindings: rtc: Convert TI Palmas RTC to DT schema

[Alexandre Belloni <alexandre.belloni@bootlin.com>]

On 19/07/2026 14:10:07+0000, Eduard Bostina wrote:
> Convert the Texas Instruments Palmas RTC controller bindings
> to DT schema.
> 
> As part of the conversion, declare 'wakeup-source: true'.
> This documents the Palmas PMIC's capability to wake the system.
> 
> Signed-off-by: Eduard Bostina <egbostina@gmail.com>
> ---
>  .../devicetree/bindings/rtc/rtc-palmas.txt    | 32 -----------
>  .../bindings/rtc/ti,palmas-rtc.yaml           | 57 +++++++++++++++++++
>  2 files changed, 57 insertions(+), 32 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/rtc/rtc-palmas.txt
>  create mode 100644 Documentation/devicetree/bindings/rtc/ti,palmas-rtc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/rtc/rtc-palmas.txt b/Documentation/devicetree/bindings/rtc/rtc-palmas.txt
> deleted file mode 100644
> index c6cf37758a77..000000000000
> --- a/Documentation/devicetree/bindings/rtc/rtc-palmas.txt
> +++ /dev/null
> @@ -1,32 +0,0 @@
> -Palmas RTC controller bindings
> -
> -Required properties:
> -- compatible:
> -  - "ti,palmas-rtc" for palma series of the RTC controller
> -- interrupts: Interrupt number of RTC submodule on device.
> -
> -Optional properties:
> -
> -- ti,backup-battery-chargeable: The Palmas series device like TPS65913 or
> -	TPS80036 supports the backup battery for powering the RTC when main
> -	battery is removed or in very low power state. The backup battery
> -	can be chargeable or non-chargeable. This flag will tells whether
> -	battery is chargeable or not. If charging battery then driver can
> -	enable the charging.
> -- ti,backup-battery-charge-high-current: Enable high current charging in
> -	backup battery. Device supports the < 100uA and > 100uA charging.
> -	The high current will be > 100uA. Absence of this property will
> -	charge battery to lower current i.e. < 100uA.
> -
> -Example:
> -	palmas: tps65913@58 {
> -		...
> -		palmas_rtc: rtc {
> -			compatible = "ti,palmas-rtc";
> -			interrupt-parent = <&palmas>;
> -			interrupts = <8 0>;
> -			ti,backup-battery-chargeable;
> -			ti,backup-battery-charge-high-current;
> -		};
> -		...
> -	};
> diff --git a/Documentation/devicetree/bindings/rtc/ti,palmas-rtc.yaml b/Documentation/devicetree/bindings/rtc/ti,palmas-rtc.yaml
> new file mode 100644
> index 000000000000..ac64f0589c84
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/rtc/ti,palmas-rtc.yaml
> @@ -0,0 +1,57 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/rtc/ti,palmas-rtc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments Palmas RTC
> +
> +maintainers:
> +  - Eduard Bostina <egbostina@gmail.com>
> +
> +allOf:
> +  - $ref: /schemas/rtc/rtc.yaml#
> +
> +properties:
> +  compatible:
> +    const: ti,palmas-rtc
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  wakeup-source: true
> +
> +  ti,backup-battery-chargeable:
> +    type: boolean
> +    description:
> +      The backup battery can be chargeable or non-chargeable. This flag
> +      indicates whether the battery is chargeable. If present, the driver
> +      can enable charging.
> +

It would be great to convert to the genric proeprty which is
aux-voltage-chargeable from rtc.yaml

> +  ti,backup-battery-charge-high-current:
> +    type: boolean
> +    description:
> +      Enable high current charging in the backup battery.
> +      Device supports the < 100uA and > 100uA charging. The high current will
> +      be > 100uA. Absence of this property will charge battery to lower
> +      current i.e. < 100uA.


I guess we could make trickle-resistor-ohms fit or get a new generic
property for this.

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com