Re: [PATCH v1] ARM: dts: imx: tqma7: add lm75a sensor (rev. 01xxx)

Alexander Stein
2023-11-09T06:59:33Z

Hi João,

Am Dienstag, 7. November 2023, 07:34:32 CET schrieb Alexander Stein:
> Hi,
>
> Am Freitag, 3. November 2023, 22:07:08 CET schrieb Fabio Estevam:
> > [Adding Bruno and Alexander]
> >
> > On Thu, Nov 2, 2023 at 7:12 PM João Rodrigues <jrodrigues@ubimet.com>
wrote:
> > > From: João Rodrigues <jrodrigues@ubimet.com>
> > >
> > > TQMa7x (revision 01xxx) uses a LM75A temperature sensor.
> > > The two sensors use different I2C addresses, so we can set both sensors
> > > simultaneously.
>
> I've contacted responsible department and I am waiting for more details.

I got response that REV.01xx was just a prototype and not released officially.

> Best regards,
> Alexander
>
> > > Signed-off-by: João Rodrigues <jrodrigues@ubimet.com>
> > > ---
> > >
> > > arch/arm/boot/dts/nxp/imx/imx7-tqma7.dtsi | 9 +++++++--
> > > 1 file changed, 7 insertions(+), 2 deletions(-)
> > >
> > > 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 {
> > >
> > > };
> > >
> > > };
> > >
> > > - /* NXP SE97BTP with temperature sensor + eeprom */
> > > + /* LM75A temperature sensor, TQMa7x 01xx */
> > > + lm75a: temperature-sensor@48 {
> > > + compatible = "national,lm75a";
> > > + reg = <0x48>;
> > > + };

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?

Best regards,
Alexander

> > > +
> > > + /* NXP SE97BTP with temperature sensor + eeprom, TQMa7x 02xx */
> > >
> > > se97b: temperature-sensor-eeprom@1e {
> > >
> > > compatible = "nxp,se97b", "jedec,jc-42.4-temp";
> > > reg = <0x1e>;
> > >
> > > - status = "okay";
> > >
> > > };
> > >
> > > /* ST M24C64 */
> > >
> > > --
> > > 2.25.1

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