[PATCH] arm64: dts: qcom: sc7180: Add sleep state for alc5682 codec

[Joseph S. Barrera III]

Add sleep state to acl5682. In default, gpio28 (HP_IRQ) is bias-pull-up.
To save power, in the new sleep state, gpio28 is bias-disable.

sleeping, /sys/kernel/debug/gpio shows gpio28 as "no pull". When codec
is awake (microphone plugged in and in use), it shows gpio28 as "pull up".

Signed-off-by: Joseph S. Barrera III <joebar@xxxxxxxxxxxx>
---

 arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
index b5f534db135a..94dd6c34d997 100644
--- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
@@ -755,8 +755,9 @@ hp_i2c: &i2c9 {
 	alc5682: codec@1a {
 		compatible = "realtek,rt5682i";
 		reg = <0x1a>;
-		pinctrl-names = "default";
+		pinctrl-names = "default", "sleep";
 		pinctrl-0 = <&hp_irq>;
+		pinctrl-1 = <&hp_sleep>;
 
 		#sound-dai-cells = <1>;
 
@@ -1336,6 +1337,18 @@ pinconf {
 		};
 	};
 
+	hp_sleep: hp-sleep {
+		pinmux {
+			pins = "gpio28";
+			function = "gpio";
+		};
+
+		pinconf {
+			pins = "gpio28";
+			bias-disable;
+		};
+	};
+
 	pen_irq_l: pen-irq-l {
 		pinmux {
 			pins = "gpio21";
-- 
2.31.0