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Thu, 9 Nov 2023 09:27:02 +0000 (UTC) Date: Thu, 9 Nov 2023 10:26:27 +0100 From: jrodrigues To: Alexander Stein Cc: Bruno Thomsen , Fabio Estevam , Rob Herring , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , NXP Linux Team , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v1] ARM: dts: imx: tqma7: add lm75a sensor (rev. 01xxx) Message-ID: <20231109102627.0bafc531@pcn112> In-Reply-To: <1783737.VLH7GnMWUR@steina-w> References: <20231102231130.13ca0513@pcn112> <2253436.iZASKD2KPV@steina-w> <1783737.VLH7GnMWUR@steina-w> Followup-To: Krzysztof Kozlowski X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231109_012705_992348_65AFD905 X-CRM114-Status: GOOD ( 25.63 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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Thu, 9 Nov 2023 09:27:02 +0000 (UTC) Date: Thu, 9 Nov 2023 10:26:27 +0100 From: jrodrigues To: Alexander Stein Cc: Bruno Thomsen , Fabio Estevam , Rob Herring , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , NXP Linux Team , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v1] ARM: dts: imx: tqma7: add lm75a sensor (rev. 01xxx) Message-ID: <20231109102627.0bafc531@pcn112> In-Reply-To: <1783737.VLH7GnMWUR@steina-w> References: <20231102231130.13ca0513@pcn112> <2253436.iZASKD2KPV@steina-w> <1783737.VLH7GnMWUR@steina-w> Followup-To: Krzysztof Kozlowski X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Alexander, On Thu, 09 Nov 2023 07:57:36 +0100 Alexander Stein wrote: > Hi Jo=C3=A3o, >=20 > Am Dienstag, 7. November 2023, 07:34:32 CET schrieb Alexander Stein: > > Hi, > >=20 > > Am Freitag, 3. November 2023, 22:07:08 CET schrieb Fabio Estevam: =20 > > > [Adding Bruno and Alexander] > > >=20 > > > On Thu, Nov 2, 2023 at 7:12=E2=80=AFPM Jo=C3=A3o Rodrigues > > > =20 > wrote: > > > > From: Jo=C3=A3o Rodrigues > > > >=20 > > > > TQMa7x (revision 01xxx) uses a LM75A temperature sensor. > > > > The two sensors use different I2C addresses, so we can set both > > > > sensors simultaneously. =20 > >=20 > > I've contacted responsible department and I am waiting for more > > details. =20 >=20 > I got response that REV.01xx was just a prototype and not released > officially. But REV. 01xx was not an internal-only prototype.=20 Furthermore, in the board manual, https://www.tq-group.com/filedownloads/files/products/embedded/manuals/arm/= carrierboard/MBa7x/MBa7x.UM.0101.pdf section 4.1.2, the old version is still referenced. >=20 > > Best regards, > > Alexander > > =20 > > > > Signed-off-by: Jo=C3=A3o Rodrigues > > > > --- > > > >=20 > > > > arch/arm/boot/dts/nxp/imx/imx7-tqma7.dtsi | 9 +++++++-- > > > > 1 file changed, 7 insertions(+), 2 deletions(-) > > > >=20 > > > > diff --git a/arch/arm/boot/dts/nxp/imx/imx7-tqma7.dtsi > > > > b/arch/arm/boot/dts/nxp/imx/imx7-tqma7.dtsi index > > > > fe42b0a4683..3fc3130f9de 100644 > > > > --- a/arch/arm/boot/dts/nxp/imx/imx7-tqma7.dtsi > > > > +++ b/arch/arm/boot/dts/nxp/imx/imx7-tqma7.dtsi > > > > @@ -128,11 +128,16 @@ vgen6_reg: vldo4 { > > > >=20 > > > > }; > > > > =20 > > > > }; > > > >=20 > > > > - /* NXP SE97BTP with temperature sensor + eeprom */ > > > > + /* LM75A temperature sensor, TQMa7x 01xx */ > > > > + lm75a: temperature-sensor@48 { > > > > + compatible =3D "national,lm75a"; > > > > + reg =3D <0x48>; > > > > + }; =20 >=20 > I don't like the idea of adding an i2c device for everybody. This > restricts/ affects usage of i2c address 0x48 for all rev.02xx users, > no? Yes, it restricts the usage of I2C address 0x48 in I2C1. While I2C1 is not exclusive to the SoM, the TQMa7x manual states "I2C1 is used for devices on the TQMa7x". As a counterpoint, the MBa7x carrier board also uses I2C1. >=20 > Best regards, > Alexander > > > > + > > > > + /* NXP SE97BTP with temperature sensor + eeprom, TQMa7x > > > > 02xx */ > > > >=20 > > > > se97b: temperature-sensor-eeprom@1e { > > > > =20 > > > > compatible =3D "nxp,se97b", "jedec,jc-42.4-temp"; > > > > reg =3D <0x1e>; > > > >=20 > > > > - status =3D "okay"; > > > >=20 > > > > }; > > > > =20 > > > > /* ST M24C64 */ > > > >=20 > > > > -- > > > > 2.25.1 =20 >=20 >=20