diff mbox series

[v2,5/5] ARM: dts: axp209: Add iio-hwmon node for internal temperature

Message ID 2a9bd53a65c4a154cccba622c60cbffcdceaeb95.1683719613.git.noodles@earth.li
State New
Headers
Series Minor device-tree additions for C.H.I.P |

Commit Message

Jonathan McDowell May 10, 2023, 12:02 p.m. UTC 
  This adds a DT node to hook up the internal temperature ADC to the
iio-hwmon driver. The various voltage + current ADCs are consumed and
exposed by their respective drivers, but this is not and is always
available. Naming chosen to match the axp20x_ prefix the power sensors
use.

Signed-off-by: Jonathan McDowell <noodles@earth.li>
---
 arch/arm/boot/dts/axp209.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

Comments

Jernej Škrabec May 11, 2023, 4:11 p.m. UTC | #1 
Dne sreda, 10. maj 2023 ob 14:02:28 CEST je Jonathan McDowell napisal(a):
> This adds a DT node to hook up the internal temperature ADC to the
> iio-hwmon driver. The various voltage + current ADCs are consumed and
> exposed by their respective drivers, but this is not and is always
> available. Naming chosen to match the axp20x_ prefix the power sensors
> use.

Sorry for maybe obvious thing, but where are other ADC channels exposed?

Best regards,
Jernej

> 
> Signed-off-by: Jonathan McDowell <noodles@earth.li>
> ---
>  arch/arm/boot/dts/axp209.dtsi | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/axp209.dtsi b/arch/arm/boot/dts/axp209.dtsi
> index ca240cd6f6c3..469d0f7d5185 100644
> --- a/arch/arm/boot/dts/axp209.dtsi
> +++ b/arch/arm/boot/dts/axp209.dtsi
> @@ -48,6 +48,13 @@
>   * http://dl.linux-sunxi.org/AXP/AXP209%20Datasheet%20v1.0_cn.pdf
>   */
> 
> +/ {
> +	pmic-temp {
> +		compatible = "iio-hwmon";
> +		io-channels = <&axp_adc 4>; /* Internal temperature */
> +	};
> +};
> +
>  &axp209 {
>  	compatible = "x-powers,axp209";
>  	interrupt-controller;
Jonathan McDowell May 12, 2023, 10:30 a.m. UTC | #2 
On Thu, May 11, 2023 at 06:11:49PM +0200, Jernej Škrabec wrote:
> Dne sreda, 10. maj 2023 ob 14:02:28 CEST je Jonathan McDowell napisal(a):
> > This adds a DT node to hook up the internal temperature ADC to the
> > iio-hwmon driver. The various voltage + current ADCs are consumed and
> > exposed by their respective drivers, but this is not and is always
> > available. Naming chosen to match the axp20x_ prefix the power sensors
> > use.
> 
> Sorry for maybe obvious thing, but where are other ADC channels exposed?

In the associated power drivers; e.g. axp20x_ac_power, axp20x_usb_power
+ axp20x_battery. The internal temperature is the only one that
logically belongs to the chip as a whole rather than one of the
subfunctions.

root@chip:~# sensors
axp20x_battery-isa-0000
Adapter: ISA adapter
in0:           0.00 V
curr1:         0.00 A

pmic_temp-isa-0000
Adapter: ISA adapter
temp1:        +42.5°C

axp20x_ac-isa-0000
Adapter: ISA adapter
in0:           0.00 V
curr1:         0.00 A

axp20x_usb-isa-0000
Adapter: ISA adapter
in0:           4.93 V  (min =  +4.00 V)
curr1:       330.00 mA (max =  +0.00 A)

> > Signed-off-by: Jonathan McDowell <noodles@earth.li>
> > ---
> >  arch/arm/boot/dts/axp209.dtsi | 7 +++++++
> >  1 file changed, 7 insertions(+)
> > 
> > diff --git a/arch/arm/boot/dts/axp209.dtsi b/arch/arm/boot/dts/axp209.dtsi
> > index ca240cd6f6c3..469d0f7d5185 100644
> > --- a/arch/arm/boot/dts/axp209.dtsi
> > +++ b/arch/arm/boot/dts/axp209.dtsi
> > @@ -48,6 +48,13 @@
> >   * http://dl.linux-sunxi.org/AXP/AXP209%20Datasheet%20v1.0_cn.pdf
> >   */
> > 
> > +/ {
> > +	pmic-temp {
> > +		compatible = "iio-hwmon";
> > +		io-channels = <&axp_adc 4>; /* Internal temperature */
> > +	};
> > +};
> > +
> >  &axp209 {
> >  	compatible = "x-powers,axp209";
> >  	interrupt-controller;

J.
Jernej Škrabec May 12, 2023, 4:37 p.m. UTC | #3 
Dne petek, 12. maj 2023 ob 12:30:32 CEST je Jonathan McDowell napisal(a):
> On Thu, May 11, 2023 at 06:11:49PM +0200, Jernej Škrabec wrote:
> > Dne sreda, 10. maj 2023 ob 14:02:28 CEST je Jonathan McDowell napisal(a):
> > > This adds a DT node to hook up the internal temperature ADC to the
> > > iio-hwmon driver. The various voltage + current ADCs are consumed and
> > > exposed by their respective drivers, but this is not and is always
> > > available. Naming chosen to match the axp20x_ prefix the power sensors
> > > use.
> > 
> > Sorry for maybe obvious thing, but where are other ADC channels exposed?
> 
> In the associated power drivers; e.g. axp20x_ac_power, axp20x_usb_power
> + axp20x_battery. The internal temperature is the only one that
> logically belongs to the chip as a whole rather than one of the
> subfunctions.
> 
> root@chip:~# sensors
> axp20x_battery-isa-0000
> Adapter: ISA adapter
> in0:           0.00 V
> curr1:         0.00 A
> 
> pmic_temp-isa-0000
> Adapter: ISA adapter
> temp1:        +42.5°C
> 
> axp20x_ac-isa-0000
> Adapter: ISA adapter
> in0:           0.00 V
> curr1:         0.00 A
> 
> axp20x_usb-isa-0000
> Adapter: ISA adapter
> in0:           4.93 V  (min =  +4.00 V)
> curr1:       330.00 mA (max =  +0.00 A)

Right.

Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Best regards,
Jernej

> 
> > > Signed-off-by: Jonathan McDowell <noodles@earth.li>
> > > ---
> > > 
> > >  arch/arm/boot/dts/axp209.dtsi | 7 +++++++
> > >  1 file changed, 7 insertions(+)
> > > 
> > > diff --git a/arch/arm/boot/dts/axp209.dtsi
> > > b/arch/arm/boot/dts/axp209.dtsi
> > > index ca240cd6f6c3..469d0f7d5185 100644
> > > --- a/arch/arm/boot/dts/axp209.dtsi
> > > +++ b/arch/arm/boot/dts/axp209.dtsi
> > > @@ -48,6 +48,13 @@
> > > 
> > >   * http://dl.linux-sunxi.org/AXP/AXP209%20Datasheet%20v1.0_cn.pdf
> > >   */
> > > 
> > > +/ {
> > > +	pmic-temp {
> > > +		compatible = "iio-hwmon";
> > > +		io-channels = <&axp_adc 4>; /* Internal temperature */
> > > +	};
> > > +};
> > > +
> > > 
> > >  &axp209 {
> > >  
> > >  	compatible = "x-powers,axp209";
> > >  	interrupt-controller;
> 
> J.
diff mbox series

Patch

diff --git a/arch/arm/boot/dts/axp209.dtsi b/arch/arm/boot/dts/axp209.dtsi
index ca240cd6f6c3..469d0f7d5185 100644
--- a/arch/arm/boot/dts/axp209.dtsi
+++ b/arch/arm/boot/dts/axp209.dtsi
@@ -48,6 +48,13 @@ 
  * http://dl.linux-sunxi.org/AXP/AXP209%20Datasheet%20v1.0_cn.pdf
  */
 
+/ {
+	pmic-temp {
+		compatible = "iio-hwmon";
+		io-channels = <&axp_adc 4>; /* Internal temperature */
+	};
+};
+
 &axp209 {
 	compatible = "x-powers,axp209";
 	interrupt-controller;