From: Robin Murphy <robin.murphy@arm.com>
To: heiko@sntech.de
Cc: linux-rockchip@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org
Subject: [PATCH v2 3/4] arm64: dts: rockchip: Add NanoPC-T4 IR receiver
Date: Mon, 14 Jan 2019 12:05:33 +0000 [thread overview]
Message-ID: <7356fc6d1e3eebfec0408d0ca61b32c11e4994e9.1547466003.git.robin.murphy@arm.com> (raw)
In-Reply-To: <cover.1547466003.git.robin.murphy@arm.com>
In common with most Rockchip reference designs, NanoPC-T4 has a passive
IR receiver connected to PWM3. In lieu of a specialised driver for
PWM-based IR pulse measurement, running the pin as a GPIO with the basic
driver works perfectly well.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
v2: No change
.../arm64/boot/dts/rockchip/rk3399-nanopc-t4.dts | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopc-t4.dts b/arch/arm64/boot/dts/rockchip/rk3399-nanopc-t4.dts
index 623a03f2548a..84433cf02be9 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopc-t4.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopc-t4.dts
@@ -45,6 +45,22 @@
press-threshold-microvolt = <18000>;
};
};
+
+ ir-receiver {
+ compatible = "gpio-ir-receiver";
+ gpios = <&gpio0 RK_PA6 GPIO_ACTIVE_LOW>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&ir_rx>;
+ };
+};
+
+&pinctrl {
+ ir {
+ ir_rx: ir-rx {
+ /* external pullup to VCC3V3_SYS, despite being 1.8V :/ */
+ rockchip,pins = <0 RK_PA6 RK_FUNC_1 &pcfg_pull_none>;
+ };
+ };
};
&sdhci {
--
2.20.1.dirty
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next prev parent reply other threads:[~2019-01-14 12:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-14 12:05 [PATCH v2 0/4] NanoPC-T4 (and a bit of NanoPi M4) support Robin Murphy
2019-01-14 12:05 ` [PATCH v2 1/4] arm64: dts: rockchip: Add DT for NanoPi M4 Robin Murphy
2019-01-16 21:12 ` Rob Herring
2019-01-14 12:05 ` [PATCH v2 2/4] arm64: dts: rockchip: Refine nanopi4 differences Robin Murphy
2019-01-14 12:05 ` Robin Murphy [this message]
2019-01-14 12:05 ` [PATCH v2 4/4] arm64: dts: rockchip: 'Fix' nanopi4 uSD card detect Robin Murphy
2019-01-17 14:01 ` [PATCH v2 0/4] NanoPC-T4 (and a bit of NanoPi M4) support Heiko Stuebner
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