From: Erwan Le Ray <erwan.leray@st.com>
To: Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>
Cc: <linux-stm32@st-md-mailman.stormreply.com>,
<linux-arm-kernel@lists.infradead.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
Erwan Le Ray <erwan.leray@st.com>,
Fabrice Gasnier <fabrice.gasnier@st.com>,
Bich Hemon <bich.hemon@st.com>
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 [thread overview]
Message-ID: <20200528073853.24759-2-erwan.leray@st.com> (raw)
In-Reply-To: <20200528073853.24759-1-erwan.leray@st.com>
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
next prev parent reply other threads:[~2020-05-28 7:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-28 7:38 [PATCH 0/3] STM32 update uart4 pin configuration for low power Erwan Le Ray
2020-05-28 7:38 ` Erwan Le Ray [this message]
2020-05-28 7:38 ` [PATCH 2/3] ARM: dts: stm32: Update pin states for uart4 on stm32mp157c-ed1 Erwan Le Ray
2020-05-28 7:38 ` [PATCH 3/3] ARM: dts: stm32: Update UART4 pin states on stm32mp15xx-dkx Erwan Le Ray
2020-06-15 10:12 ` [PATCH 0/3] STM32 update uart4 pin configuration for low power Alexandre Torgue
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