lkml.org 
[lkml]   [2019]   [Jun]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/3] dt-bindings: iio: adc: stm32: add analog switches supply control
Date
On stm32h7 and stm32mp1, the ADC inputs are multiplexed with analog
switches which have reduced performances when their supply is below 2.7V
(vdda by default).

Add documentation for optional vdda-supply & vdd-supply that can be used
to supply analog circuitry (controlled by syscfg bits).

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
---
Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
index 8346bcb..3af48b9 100644
--- a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
+++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
@@ -46,6 +46,12 @@ Required properties:
Optional properties:
- A pinctrl state named "default" for each ADC channel may be defined to set
inX ADC pins in mode of operation for analog input on external pin.
+- vdda-supply: Phandle to the vdda input voltage. It can be used to supply ADC
+ analog inputs switches on stm32h7 and stm32mp1.
+- vdd-supply: Phandle to the vdd input voltage. It can be used to supply ADC
+ analog inputs switches on stm32mp1.
+- st,syscfg: Phandle to system configuration controller. It can be used to
+ control the analog circuitry on stm32h7 and stm32mp1.

Contents of a stm32 adc child node:
-----------------------------------
--
2.7.4
\
 
 \ /
  Last update: 2019-06-12 09:26    [W:0.051 / U:34.588 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site