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Fri, 12 Dec 2025 08:33:49 -0800 (PST) Message-ID: <67209860ae2ff5626b7eaa50f2dd4b496eaa06d3.camel@gmail.com> Subject: Re: [PATCH v4 2/3] hwmon: ltc4283: Add support for the LTC4283 Swap Controller From: Nuno =?ISO-8859-1?Q?S=E1?= To: Guenter Roeck , nuno.sa@analog.com, linux-hwmon@vger.kernel.org, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-doc@vger.kernel.org Cc: Krzysztof Kozlowski , Conor Dooley , Jean Delvare , Jonathan Corbet , Linus Walleij , Bartosz Golaszewski Date: Fri, 12 Dec 2025 16:34:29 +0000 In-Reply-To: <144d50f7-398c-4b10-bd21-a6d0c6c7b4c8@roeck-us.net> References: <20251204-ltc4283-support-v4-0-db0197fd7984@analog.com> <20251204-ltc4283-support-v4-2-db0197fd7984@analog.com> <144d50f7-398c-4b10-bd21-a6d0c6c7b4c8@roeck-us.net> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.58.2 Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Sat, 2025-12-06 at 10:40 -0800, Guenter Roeck wrote: > On 12/4/25 08:15, Nuno S=C3=A1 via B4 Relay wrote: > > From: Nuno S=C3=A1 > >=20 > > Support the LTC4283 How Swap Controller. The device features programmab= le > > current limit with foldback and independently adjustable inrush current= to > > optimize the MOSFET safe operating area (SOA). The SOA timer limits MOS= FET > > temperature rise for reliable protection against overstresses. > >=20 > > An I2C interface and onboard ADC allow monitoring of board current, > > voltage, power, energy, and fault status. > >=20 > > Signed-off-by: Nuno S=C3=A1 >=20 > I finally found the time to write module test code for the driver. >=20 Thanks! > Some early feedback: >=20 > - The driver must work with non-devicetree systems and without device > =C2=A0=C2=A0 property support. Select defaults where necessary. I'll double check that... But one thing that already comes to mind is rsens= e? Rsense is the main design choice for a thing like this. Not sure we can decide on = a meaningful default for it? I believe we have the same situation for ltc4282.c > - Attributes marked as readable in the is_visible function must be readab= le. > =C2=A0=C2=A0 It is not acceptable to return -EOPNOTSUPP. That applies to = all > =C2=A0=C2=A0 reset_history attributes and maybe to others. Hmm that's a mistake. They should be WO and I have the same bug in ltc4282 = so I need to send a patch. - Nuno S=C3=A1 >=20