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ARM: dts: stm32: update uart4 pin configuration for low power on stm32mp157

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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>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
This commit is contained in:
Erwan Le Ray
2020-05-28 09:38:51 +02:00
committed by Alexandre Torgue
parent 1a21240dd0
commit 251fe9a533
1 changed files with 17 additions and 0 deletions
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17
arch/arm/boot/dts/stm32mp15-pinctrl.dtsi
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@@ -1648,6 +1648,23 @@ pins2 {
};
};
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 */