| From 0152a0d91c9a6b30ebeae65dd67a7833a7738866 Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Thu, 11 Feb 2021 12:07:03 +0100 |
| Subject: ARM: dts: stm32: fix usart 2 & 3 pinconf to wake up with flow control |
| |
| From: Valentin CARON - foss <valentin.caron@foss.st.com> |
| |
| [ Upstream commit a1429f3d3029b65cd4032f6218d5290911377ce4 ] |
| |
| Modify usart 2 & 3 pins to allow wake up from low power mode while the |
| hardware flow control is activated. UART RTS pin need to stay configure |
| in idle mode to receive characters in order to wake up. |
| |
| Fixes: 842ed898a757 ("ARM: dts: stm32: add usart2, usart3 and uart7 pins in stm32mp15-pinctrl") |
| |
| Signed-off-by: Valentin Caron <valentin.caron@foss.st.com> |
| Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com> |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| arch/arm/boot/dts/stm32mp15-pinctrl.dtsi | 21 ++++++++++++++++++--- |
| 1 file changed, 18 insertions(+), 3 deletions(-) |
| |
| diff --git a/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi |
| index 20a59e8f7a33..f10a740ca3c1 100644 |
| --- a/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi |
| +++ b/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi |
| @@ -1868,10 +1868,15 @@ |
| usart2_idle_pins_c: usart2-idle-2 { |
| pins1 { |
| pinmux = <STM32_PINMUX('D', 5, ANALOG)>, /* USART2_TX */ |
| - <STM32_PINMUX('D', 4, ANALOG)>, /* USART2_RTS */ |
| <STM32_PINMUX('D', 3, ANALOG)>; /* USART2_CTS_NSS */ |
| }; |
| pins2 { |
| + pinmux = <STM32_PINMUX('D', 4, AF7)>; /* USART2_RTS */ |
| + bias-disable; |
| + drive-push-pull; |
| + slew-rate = <3>; |
| + }; |
| + pins3 { |
| pinmux = <STM32_PINMUX('D', 6, AF7)>; /* USART2_RX */ |
| bias-disable; |
| }; |
| @@ -1917,10 +1922,15 @@ |
| usart3_idle_pins_b: usart3-idle-1 { |
| pins1 { |
| pinmux = <STM32_PINMUX('B', 10, ANALOG)>, /* USART3_TX */ |
| - <STM32_PINMUX('G', 8, ANALOG)>, /* USART3_RTS */ |
| <STM32_PINMUX('I', 10, ANALOG)>; /* USART3_CTS_NSS */ |
| }; |
| pins2 { |
| + pinmux = <STM32_PINMUX('G', 8, AF8)>; /* USART3_RTS */ |
| + bias-disable; |
| + drive-push-pull; |
| + slew-rate = <0>; |
| + }; |
| + pins3 { |
| pinmux = <STM32_PINMUX('B', 12, AF8)>; /* USART3_RX */ |
| bias-disable; |
| }; |
| @@ -1953,10 +1963,15 @@ |
| usart3_idle_pins_c: usart3-idle-2 { |
| pins1 { |
| pinmux = <STM32_PINMUX('B', 10, ANALOG)>, /* USART3_TX */ |
| - <STM32_PINMUX('G', 8, ANALOG)>, /* USART3_RTS */ |
| <STM32_PINMUX('B', 13, ANALOG)>; /* USART3_CTS_NSS */ |
| }; |
| pins2 { |
| + pinmux = <STM32_PINMUX('G', 8, AF8)>; /* USART3_RTS */ |
| + bias-disable; |
| + drive-push-pull; |
| + slew-rate = <0>; |
| + }; |
| + pins3 { |
| pinmux = <STM32_PINMUX('B', 12, AF8)>; /* USART3_RX */ |
| bias-disable; |
| }; |
| -- |
| 2.30.2 |
| |