diff mbox series

[v2,2/3] dt-bindings: iio: magnetometer: ak8975: add gpio reset support

Message ID 20200519065749.4624-3-jonathan.albrieux@gmail.com (mailing list archive)
State New, archived
Headers show
Series iio: magnetometer: ak8975: Add gpio reset support | expand

Commit Message

Jonathan Albrieux May 19, 2020, 6:57 a.m. UTC
Add reset-gpio support.

Without reset's deassertion during ak8975_power_on, driver's probe fails on
ak8975_who_i_am while checking for device identity for AK09911 chip

AK09911 has an active low reset gpio to handle register's reset.
AK09911 datasheed says that, if not used, reset pin should be connected
to VID. This patch emulates this situation

Signed-off-by: Jonathan Albrieux <jonathan.albrieux@gmail.com>
---
 .../devicetree/bindings/iio/magnetometer/ak8975.yaml          | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/iio/magnetometer/ak8975.yaml b/Documentation/devicetree/bindings/iio/magnetometer/ak8975.yaml
index 86e3efa693a8..a82c0ff5d098 100644
--- a/Documentation/devicetree/bindings/iio/magnetometer/ak8975.yaml
+++ b/Documentation/devicetree/bindings/iio/magnetometer/ak8975.yaml
@@ -37,6 +37,9 @@  properties:
   mount-matrix:
     description: an optional 3x3 mounting rotation matrix
 
+  reset-gpio:
+    description: an optional pin needed for AK09911 to set the reset state
+
 required:
   - compatible
   - reg
@@ -53,6 +56,7 @@  examples:
             reg = <0x0c>;
             gpios = <&gpj0 7 0>;
             vdd-supply = <&ldo_3v3_gnss>;
+            reset-gpio = <&msmgpio 111 1>;
             mount-matrix = "-0.984807753012208",  /* x0 */
                            "0",                   /* y0 */
                            "-0.173648177666930",  /* z0 */