diff options
Diffstat (limited to 'zephyr/projects/herobrine/adc.dts')
| -rw-r--r-- | zephyr/projects/herobrine/adc.dts | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/zephyr/projects/herobrine/adc.dts b/zephyr/projects/herobrine/adc.dts new file mode 100644 index 0000000000..16a5434e9d --- /dev/null +++ b/zephyr/projects/herobrine/adc.dts @@ -0,0 +1,47 @@ +/* Copyright 2022 The ChromiumOS Authors + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include <zephyr/dt-bindings/adc/adc.h> + +/ { + named-adc-channels { + compatible = "named-adc-channels"; + + vbus { + enum-name = "ADC_VBUS"; + io-channels = <&adc0 1>; + /* Measure VBUS through a 1/10 voltage divider */ + mul = <10>; + }; + amon_bmon { + enum-name = "ADC_AMON_BMON"; + io-channels = <&adc0 2>; + /* + * Adapter current output or battery charging/ + * discharging current (uV) 18x amplification on + * charger side. + */ + mul = <1000>; + div = <18>; + }; + psys { + enum-name = "ADC_PSYS"; + io-channels = <&adc0 3>; + /* + * ISL9238 PSYS output is 1.44 uA/W over 5.6K resistor, + * to read 0.8V @ 99 W, i.e. 124000 uW/mV. + */ + mul = <124000>; + }; + }; +}; + +&adc0 { + status = "okay"; + pinctrl-0 = <&adc0_chan1_gp44 + &adc0_chan2_gp43 + &adc0_chan3_gp42>; + pinctrl-names = "default"; +}; |