From: Erwan Le Ray <erwan.leray@st.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jslaby@suse.com>,
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-serial@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
Erwan Le Ray <erwan.leray@st.com>,
"Fabrice Gasnier" <fabrice.gasnier@st.com>,
Bich Hemon <bich.hemon@st.com>
Subject: [PATCH 07/10] ARM: dts: stm32: update uart4 pin configurations for low power
Date: Tue, 4 Jun 2019 10:55:16 +0200 [thread overview]
Message-ID: <1559638519-6128-8-git-send-email-erwan.leray@st.com> (raw)
In-Reply-To: <1559638519-6128-1-git-send-email-erwan.leray@st.com>
Currently, pinctrl states defines only one "sleep" configuration for pins,
no matter the possible uart low power modes (Rx pin always kept active).
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
- "default" state remains untouched, to be used while the UART is active
or in case the no_console_suspend mode is enabled
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/stm32mp157-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
index 85c417d..2e1ab1b 100644
--- a/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
@@ -599,6 +599,23 @@
bias-disable;
};
};
+
+ 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 */
+ };
+ };
};
pinctrl_z: pin-controller-z@54004000 {
--
1.9.1
next prev parent reply other threads:[~2019-06-04 9:12 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-04 8:55 [PATCH 00/10] STM32 usart power improvements Erwan Le Ray
2019-06-04 8:55 ` [PATCH 01/10] dt-bindings: serial: stm32: add wakeup option Erwan Le Ray
2019-06-04 8:55 ` [PATCH 02/10] dt-bindings: serial: add optional pinctrl states Erwan Le Ray
2019-06-04 8:55 ` [PATCH 03/10] serial: stm32: select pinctrl state in each suspend/resume function Erwan Le Ray
2019-06-04 8:55 ` [PATCH 04/10] serial: stm32: add pm_runtime support Erwan Le Ray
2019-06-10 16:48 ` Greg Kroah-Hartman
2019-06-04 8:55 ` [PATCH 05/10] serial: stm32: Use __maybe_unused instead of #if CONFIG_PM_SLEEP Erwan Le Ray
2019-06-04 8:55 ` [PATCH 06/10] serial: stm32: add support for no_console_suspend Erwan Le Ray
2019-06-04 8:55 ` Erwan Le Ray [this message]
2019-06-04 8:55 ` [PATCH 08/10] ARM: dts: stm32: Update pin states for uart4 on stm32mp157c-ed1 Erwan Le Ray
2019-06-04 8:55 ` [PATCH 09/10] ARM: dts: stm32: Update UART4 pin states on stm32mp157a-dk1 Erwan Le Ray
2019-06-04 8:55 ` [PATCH 10/10] ARM: dts: stm32: add wakeup capability on each usart/uart on stm32mp157c Erwan Le Ray
2019-06-10 16:00 ` [PATCH 00/10] STM32 usart power improvements Alexandre Torgue
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