63 lines
1.8 KiB
Diff
63 lines
1.8 KiB
Diff
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From 2c2e60256f2cbb2fce50a6317f85b1500efd1a6c Mon Sep 17 00:00:00 2001
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From: "Miouyouyou (Myy)" <myy@miouyouyou.fr>
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Date: Mon, 5 Nov 2018 22:03:26 +0100
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Subject: [PATCH] ARM: DTS: rk3288-tinker: Setup the Bluetooth UART pins
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The most essential being the RTS pin, which is clearly needed to
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upload the initial configuration into the Realtek Bluetooth
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chip, and make the Bluetooth chip work.
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Now, the Bluetooth chip also needs 3 other GPIOS to be enabled.
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I'll see how I do that through the DTS file in a near future.
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The 3 GPIOS being :
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Bluetooth Reset : <&gpio4 29 GPIO_ACTIVE_HIGH>
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Bluetooth Wake : <&gpio4 26 GPIO_ACTIVE_HIGH>
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Bluetooth Wake_Host_IRQ : <&gpio4 31 GPIO_ACTIVE_HIGH>
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These are currently setup manually, through scripts. But it seems that
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GPIO handling through /sys entries might not be possible in the long
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term, the replacement being libgpio.
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Anyway, if you're interesting in enabling the Bluetooth GPIO by hand,
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here are the commands :
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cd /sys/class/gpio &&
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echo 146 > export &&
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echo 149 > export &&
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echo 151 > export &&
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echo high > gpio146/direction &&
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echo high > gpio149/direction &&
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echo high > gpio151/direction
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Resetting the chip is done like this :
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echo "Resetting the Bluetooth chip"
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cd /sys/class/gpio/gpio149 &&
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echo 0 > value &&
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sleep 1 &&
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echo 1 > value &&
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sleep 1
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Signed-off-by: Miouyouyou (Myy) <myy@miouyouyou.fr>
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---
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arch/arm/boot/dts/rk3288-tinker.dts | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/arch/arm/boot/dts/rk3288-tinker.dts b/arch/arm/boot/dts/rk3288-tinker.dts
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index d4df13bed..b92e59c1e 100644
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--- a/arch/arm/boot/dts/rk3288-tinker.dts
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+++ b/arch/arm/boot/dts/rk3288-tinker.dts
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@@ -73,3 +73,9 @@
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status = "okay";
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supports-sdio;
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};
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+
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+&uart0 {
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&uart0_xfer>, <&uart0_cts>, <&uart0_rts>;
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+};
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+
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--
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2.16.4
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