linux-kernel - [PATCH v4 3/4] ARM: dts: sun8i-a83t-tbs-a711: Add support for the vibrator motor

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Date:   Tue, 14 Jul 2020 12:23:02 +0200
From:   Ondrej Jirman <megous@...ous.com>
To:     linux-sunxi@...glegroups.com,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>
Cc:     Ondrej Jirman <megous@...ous.com>, Luca Weiss <luca@...tu.xyz>,
        Tomas Novotny <tomas@...otny.cz>, linux-input@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v4 3/4] ARM: dts: sun8i-a83t-tbs-a711: Add support for the vibrator motor

The board has a vibrator motor. Hook it to the input subsystem.

According to the PMIC specification, LDO needs to be enabled (value 0b11)
to achieve the specified max driving current of 150mA. We can't drive
the motor with just GPIO mode.

In GPIO mode the chip is probably just using the regular CMOS logic
output circuitry (typically limited to around 20-35mA, but not specified
in this datasheet).

Signed-off-by: Ondrej Jirman <megous@...ous.com>
---
 arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts b/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts
index bfc9bb277a49..a278a1e33930 100644
--- a/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts
+++ b/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts
@@ -99,6 +99,11 @@ panel_input: endpoint {
 		};
 	};
 
+	vibrator {
+		compatible = "gpio-vibrator";
+		vcc-supply = <&reg_ldo_io1>;
+	};
+
 	reg_gps: reg-gps {
 		compatible = "regulator-fixed";
 		regulator-name = "gps";
-- 
2.27.0