dt-bindings: iio: magnetometer: ak8975: add gpio reset support (94d2adc9) · Commits · 戴 / test

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 datasheet 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> Reviewed-by:

Rob Herring <robh@kernel.org> Signed-off-by:

Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/magnetometer/asahi-kasei,ak8975.yaml

+7 −0

Original line number	Diff line number	Diff line
		@@ -46,6 +46,11 @@ properties:
		mount-matrix:
		description: an optional 3x3 mounting rotation matrix.

		reset-gpios:
		description: \|
		an optional pin needed for AK09911 to set the reset state. This should
		be usually active low

		required:
		- compatible
		- reg
		@@ -53,6 +58,7 @@ required:
		examples:
		- \|
		#include <dt-bindings/interrupt-controller/irq.h>
		#include <dt-bindings/gpio/gpio.h>
		i2c {
		#address-cells = <1>;
		#size-cells = <0>;
		@@ -63,6 +69,7 @@ examples:
		interrupt-parent = <&gpio6>;
		interrupts = <15 IRQ_TYPE_EDGE_RISING>;
		vdd-supply = <&ldo_3v3_gnss>;
		reset-gpios = <&msmgpio 111 GPIO_ACTIVE_LOW>;
		mount-matrix = "-0.984807753012208", /* x0 */
		"0", /* y0 */
		"-0.173648177666930", /* z0 */

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