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From: Chen-Yu Tsai <wens@kernel.org>
To: Heiko Stuebner <heiko@sntech.de>
Cc: Chen-Yu Tsai <wens@csie.org>, Robin Murphy <robin.murphy@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] arm64: dts: rockchip: nanopi4: decrease Bluetooth UART baud rate
Date: Tue, 21 Sep 2021 01:56:46 +0800	[thread overview]
Message-ID: <20210920175647.13008-1-wens@kernel.org> (raw)

From: Chen-Yu Tsai <wens@csie.org>

The RK3399 does not seem to be able to properly generate the required
64 MHz clock for the UART to operate at 4MBd.

Drop the baud rate down to 3MBd, which can be used as the clock
controller is able to produce a 48 MHz clock.

Fixes: 3e2f0bb72be3 ("arm64: dts: rockchip: Add nanopi4 bluetooth")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi
index 8c0ff6c96e03..45ff053b119d 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi
@@ -699,7 +699,7 @@ bluetooth {
 		device-wakeup-gpios = <&gpio2 RK_PD2 GPIO_ACTIVE_HIGH>;
 		host-wakeup-gpios = <&gpio0 RK_PA4 GPIO_ACTIVE_HIGH>;
 		shutdown-gpios = <&gpio0 RK_PB1 GPIO_ACTIVE_HIGH>;
-		max-speed = <4000000>;
+		max-speed = <3000000>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&bt_reg_on_h &bt_host_wake_l &bt_wake_l>;
 		vbat-supply = <&vcc3v3_sys>;
-- 
2.30.2


_______________________________________________
Linux-rockchip mailing list
Linux-rockchip@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-rockchip

WARNING: multiple messages have this Message-ID (diff)
From: Chen-Yu Tsai <wens@kernel.org>
To: Heiko Stuebner <heiko@sntech.de>
Cc: Chen-Yu Tsai <wens@csie.org>, Robin Murphy <robin.murphy@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] arm64: dts: rockchip: nanopi4: decrease Bluetooth UART baud rate
Date: Tue, 21 Sep 2021 01:56:46 +0800	[thread overview]
Message-ID: <20210920175647.13008-1-wens@kernel.org> (raw)

From: Chen-Yu Tsai <wens@csie.org>

The RK3399 does not seem to be able to properly generate the required
64 MHz clock for the UART to operate at 4MBd.

Drop the baud rate down to 3MBd, which can be used as the clock
controller is able to produce a 48 MHz clock.

Fixes: 3e2f0bb72be3 ("arm64: dts: rockchip: Add nanopi4 bluetooth")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi
index 8c0ff6c96e03..45ff053b119d 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi
@@ -699,7 +699,7 @@ bluetooth {
 		device-wakeup-gpios = <&gpio2 RK_PD2 GPIO_ACTIVE_HIGH>;
 		host-wakeup-gpios = <&gpio0 RK_PA4 GPIO_ACTIVE_HIGH>;
 		shutdown-gpios = <&gpio0 RK_PB1 GPIO_ACTIVE_HIGH>;
-		max-speed = <4000000>;
+		max-speed = <3000000>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&bt_reg_on_h &bt_host_wake_l &bt_wake_l>;
 		vbat-supply = <&vcc3v3_sys>;
-- 
2.30.2


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Chen-Yu Tsai <wens@kernel.org>
To: Heiko Stuebner <heiko@sntech.de>
Cc: Chen-Yu Tsai <wens@csie.org>, Robin Murphy <robin.murphy@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] arm64: dts: rockchip: nanopi4: decrease Bluetooth UART baud rate
Date: Tue, 21 Sep 2021 01:56:46 +0800	[thread overview]
Message-ID: <20210920175647.13008-1-wens@kernel.org> (raw)

From: Chen-Yu Tsai <wens@csie.org>

The RK3399 does not seem to be able to properly generate the required
64 MHz clock for the UART to operate at 4MBd.

Drop the baud rate down to 3MBd, which can be used as the clock
controller is able to produce a 48 MHz clock.

Fixes: 3e2f0bb72be3 ("arm64: dts: rockchip: Add nanopi4 bluetooth")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi
index 8c0ff6c96e03..45ff053b119d 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi
@@ -699,7 +699,7 @@ bluetooth {
 		device-wakeup-gpios = <&gpio2 RK_PD2 GPIO_ACTIVE_HIGH>;
 		host-wakeup-gpios = <&gpio0 RK_PA4 GPIO_ACTIVE_HIGH>;
 		shutdown-gpios = <&gpio0 RK_PB1 GPIO_ACTIVE_HIGH>;
-		max-speed = <4000000>;
+		max-speed = <3000000>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&bt_reg_on_h &bt_host_wake_l &bt_wake_l>;
 		vbat-supply = <&vcc3v3_sys>;
-- 
2.30.2


             reply	other threads:[~2021-09-20 17:57 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-20 17:56 Chen-Yu Tsai [this message]
2021-09-20 17:56 ` [PATCH] arm64: dts: rockchip: nanopi4: decrease Bluetooth UART baud rate Chen-Yu Tsai
2021-09-20 17:56 ` Chen-Yu Tsai
2021-09-20 17:56 ` [PATCH] arm64: dts: rockchip: rk3399: Hook up DMA for UARTs Chen-Yu Tsai
2021-09-20 17:56   ` Chen-Yu Tsai
2021-09-20 17:56   ` Chen-Yu Tsai
2021-10-20  8:10   ` Heiko Stuebner
2021-10-20  8:10     ` Heiko Stuebner
2021-10-20  8:10     ` Heiko Stuebner
2021-10-06 10:49 ` [PATCH] arm64: dts: rockchip: nanopi4: decrease Bluetooth UART baud rate Robin Murphy
2021-10-06 10:49   ` Robin Murphy
2021-10-06 10:49   ` Robin Murphy
2021-10-07 17:13   ` Chen-Yu Tsai
2021-10-07 17:13     ` Chen-Yu Tsai
2021-10-07 17:13     ` Chen-Yu Tsai
2021-10-20 12:57     ` Robin Murphy
2021-10-20 12:57       ` Robin Murphy
2021-10-20 12:57       ` Robin Murphy

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