Messages in this thread Patch in this message | | | From | Erwan Le Ray <> | Subject | [PATCH 1/3] ARM: dts: stm32: update uart4 pin configuration for low power on stm32mp157 | Date | Thu, 28 May 2020 09:38:51 +0200 |
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Sleep pin configuration is refined for low power modes: - "sleep" (no wakeup & console suspend enabled): put pins in analog state to optimize power - "idle" (wakeup capability): keep Rx pin in alternate function
Signed-off-by: Bich Hemon <bich.hemon@st.com> Signed-off-by: Erwan Le Ray <erwan.leray@st.com>
diff --git a/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi index 7eb858732d6d..7cf535dc05f5 100644 --- a/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi +++ b/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi @@ -1648,6 +1648,23 @@ }; }; + uart4_idle_pins_a: uart4-idle-0 { + pins1 { + pinmux = <STM32_PINMUX('G', 11, ANALOG)>; /* UART4_TX */ + }; + pins2 { + pinmux = <STM32_PINMUX('B', 2, AF8)>; /* UART4_RX */ + bias-disable; + }; + }; + + uart4_sleep_pins_a: uart4-sleep-0 { + pins { + pinmux = <STM32_PINMUX('G', 11, ANALOG)>, /* UART4_TX */ + <STM32_PINMUX('B', 2, ANALOG)>; /* UART4_RX */ + }; + }; + uart4_pins_b: uart4-1 { pins1 { pinmux = <STM32_PINMUX('D', 1, AF8)>; /* UART4_TX */ -- 2.17.1
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