2020-05-28 07:43:57

by Erwan LE RAY

Subject: [PATCH 0/3] STM32 update uart4 pin configuration for low power

Update uart4 pin configuration for low power in pinctrl, and for ed/ev
and dkx boards.

Erwan Le Ray (3):
ARM: dts: stm32: update uart4 pin configuration for low power on
stm32mp157
ARM: dts: stm32: Update pin states for uart4 on stm32mp157c-ed1
ARM: dts: stm32: Update UART4 pin states on stm32mp15xx-dkx

arch/arm/boot/dts/stm32mp15-pinctrl.dtsi | 17 +++++++++++++++++
arch/arm/boot/dts/stm32mp157c-ed1.dts | 4 +++-
arch/arm/boot/dts/stm32mp15xx-dkx.dtsi | 4 +++-
3 files changed, 23 insertions(+), 2 deletions(-)

--
2.17.1

2020-05-28 07:44:24

by Erwan LE RAY

Subject: [PATCH 1/3] ARM: dts: stm32: update uart4 pin configuration for low power on stm32mp157

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 <[email protected]>
Signed-off-by: Erwan Le Ray <[email protected]>

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

2020-05-28 07:44:27

by Erwan LE RAY

Subject: [PATCH 3/3] ARM: dts: stm32: Update UART4 pin states on stm32mp15xx-dkx

Add sleep and idle states to uart4 pin configuration.

Signed-off-by: Erwan Le Ray <[email protected]>

diff --git a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
index 70db923a45f7..e5fdbc149bf4 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
@@ -584,8 +584,10 @@
};

&uart4 {
- pinctrl-names = "default";
+ pinctrl-names = "default", "sleep", "idle";
pinctrl-0 = <&uart4_pins_a>;
+ pinctrl-1 = <&uart4_sleep_pins_a>;
+ pinctrl-2 = <&uart4_idle_pins_a>;
status = "okay";
};

--
2.17.1

2020-05-28 07:44:33

by Erwan LE RAY

Subject: [PATCH 2/3] ARM: dts: stm32: Update pin states for uart4 on stm32mp157c-ed1

Add sleep and idle states to uart4 pin configuration.

Signed-off-by: Erwan Le Ray <[email protected]>

diff --git a/arch/arm/boot/dts/stm32mp157c-ed1.dts b/arch/arm/boot/dts/stm32mp157c-ed1.dts
index 32ccd50b4144..ca109dc18238 100644
--- a/arch/arm/boot/dts/stm32mp157c-ed1.dts
+++ b/arch/arm/boot/dts/stm32mp157c-ed1.dts
@@ -353,8 +353,10 @@
};

&uart4 {
- pinctrl-names = "default";
+ pinctrl-names = "default", "sleep", "idle";
pinctrl-0 = <&uart4_pins_a>;
+ pinctrl-1 = <&uart4_sleep_pins_a>;
+ pinctrl-2 = <&uart4_idle_pins_a>;
status = "okay";
};

--
2.17.1

2020-06-15 10:14:40

by Alexandre Torgue

Subject: Re: [PATCH 0/3] STM32 update uart4 pin configuration for low power

Hi Erwan

On 5/28/20 9:38 AM, Erwan Le Ray wrote:
> Update uart4 pin configuration for low power in pinctrl, and for ed/ev
> and dkx boards.
>
> Erwan Le Ray (3):
> ARM: dts: stm32: update uart4 pin configuration for low power on
> stm32mp157
> ARM: dts: stm32: Update pin states for uart4 on stm32mp157c-ed1
> ARM: dts: stm32: Update UART4 pin states on stm32mp15xx-dkx
>
> arch/arm/boot/dts/stm32mp15-pinctrl.dtsi | 17 +++++++++++++++++
> arch/arm/boot/dts/stm32mp157c-ed1.dts | 4 +++-
> arch/arm/boot/dts/stm32mp15xx-dkx.dtsi | 4 +++-
> 3 files changed, 23 insertions(+), 2 deletions(-)
>

Series applied on stm32-next.

Regards
Alex