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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org On 28/04/2026 16:09, Chris Morgan wrote: > On Tue, Apr 28, 2026 at 09:47:00AM +0200, Krzysztof Kozlowski wrote: >> On Mon, Apr 27, 2026 at 12:09:09PM -0500, Chris Morgan wrote: >>> From: Chris Morgan >>> >>> Document the SG Micro sgm41542 battery charger/boost converter. >>> >>> Signed-off-by: Chris Morgan >>> --- >>> .../supply/sgmicro,sgm41542-charger.yaml | 99 +++++++++++++++++++ >>> 1 file changed, 99 insertions(+) >>> create mode 100644 Documentation/devicetree/bindings/power/supply/sgmicro,sgm41542-charger.yaml >>> >>> diff --git a/Documentation/devicetree/bindings/power/supply/sgmicro,sgm41542-charger.yaml b/Documentation/devicetree/bindings/power/supply/sgmicro,sgm41542-charger.yaml >>> new file mode 100644 >>> index 000000000000..3e5041e5b551 >>> --- /dev/null >>> +++ b/Documentation/devicetree/bindings/power/supply/sgmicro,sgm41542-charger.yaml >> >> Filename must match compatible. > > Acknowledged. > >> >>> @@ -0,0 +1,99 @@ >>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >>> +%YAML 1.2 >>> +--- >>> +$id: http://devicetree.org/schemas/power/supply/sgmicro,sgm41542-charger.yaml# >>> +$schema: http://devicetree.org/meta-schemas/core.yaml# >>> + >>> +title: SGM41542 Battery Charger >>> + >>> +description: | >> >> Do not need '|' unless you need to preserve formatting. >> > > Will fix. > >>> + The SGMicro SGM41542 is a single cell battery charger/boost controller. >>> + >>> +maintainers: >>> + - Chris Morgan >>> + - Xu Shengfei >>> + >>> +properties: >>> + compatible: >>> + const: sgmicro,sgm41542 >>> + >>> + input-current-limit-microamp: >> >> Missing vendor prefix. >> > > This *appears* to be a standard value (perhaps not formally, but in use by > enough devices to suggest a defacto standard), which is why I did not use > the vendor prefix here. Do I need to add that for this one? I know, I found these other properties but I think they were just coming from old schema. If it is really a common property, then should be defined in a common schema and this did not happen. > >>> + description: >>> + Optional value to clamp the maximum input current limit to for >>> + the device. If omitted, the default value for the hardware will >>> + be used (2400000). >>> + minimum: 100000 >>> + maximum: 3800000 >>> + >>> + input-voltage-limit-microvolt: >>> + description: >>> + Optional value to clamp the maximum input voltage limit to for >>> + the device. If omitted, the default value for the hardware will >>> + be used (4500000). >>> + minimum: 3900000 >>> + maximum: 12000000 >>> + >>> + interrupts: >>> + maxItems: 1 >>> + >>> + monitored-battery: >> >> You miss definition of this property. I guess this is power supply, so >> reference proper schema for power supplies. Look at other bindings to >> for some example code. > > I'll look at this some more, I might have a few more questions. But I will > make the changes requested. > >> >>> + description: | >>> + A phandle to a monitored battery node. Values for the following >>> + are used by the driver and if not present will result in default >>> + values being applied: >>> + constant-charge-current-max-microamp >>> + constant-charge-voltage-max-microvolt >>> + charge-term-current-microamp >>> + precharge-current-microamp >>> + >>> + reg: >>> + maxItems: 1 >>> + >>> + regulators: >> >> No need for regulators node, just define here otg-vbus directly. But >> honestly, your example is incomplete or you defined something implied by >> the compatible. If you have a fixed 5V regulator, what is the point of >> defining it in the DT? > > The regulator can be adjusted within a range around 5V, and is referenced > by the USB subsystem. Should I still omit it from the device tree or instead > define the min and max values? If it can be adjusted then it's fine, can stay. Best regards, Krzysztof _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip