| Message ID | 1560433800-12255-3-git-send-email-erwan.leray@st.com |
|---|---|
| State | Changes Requested, archived |
| Headers | show |
| Series | None | expand |
| Context | Check | Description |
|---|---|---|
| robh/checkpatch | success |
On Thu, Jun 13, 2019 at 03:49:52PM +0200, Erwan Le Ray wrote: > From: Bich Hemon <bich.hemon@st.com> > > Add options for pinctrl states: > - "sleep" for low power > - "idle" for low power and wakeup capabilities enabled > - "no_console_suspend" for enabling console messages in low power > > Signed-off-by: Bich Hemon <bich.hemon@st.com> > Signed-off-by: Erwan Le Ray <erwan.leray@st.com> > > diff --git a/Documentation/devicetree/bindings/serial/st,stm32-usart.txt b/Documentation/devicetree/bindings/serial/st,stm32-usart.txt > index 5ec80c1..64a5ea9 100644 > --- a/Documentation/devicetree/bindings/serial/st,stm32-usart.txt > +++ b/Documentation/devicetree/bindings/serial/st,stm32-usart.txt > @@ -13,7 +13,14 @@ Required properties: > - clocks: The input clock of the USART instance > > Optional properties: > -- pinctrl: The reference on the pins configuration > +- pinctrl-names: Set to "default". An additional "sleep" state can be defined > + to set pins in sleep state when in low power. In case the device is used as > + a wakeup source, "idle" state is defined in order to keep RX pin active. > + For a console device, an optional state "no_console_suspend" can be defined > + to enable console messages during suspend. Typically, "no_console_suspend" and > + "default" states can refer to the same pin configuration. no_console_suspend is a linux thing and doesn't belong in DT. Rob
diff --git a/Documentation/devicetree/bindings/serial/st,stm32-usart.txt b/Documentation/devicetree/bindings/serial/st,stm32-usart.txt index 5ec80c1..64a5ea9 100644 --- a/Documentation/devicetree/bindings/serial/st,stm32-usart.txt +++ b/Documentation/devicetree/bindings/serial/st,stm32-usart.txt @@ -13,7 +13,14 @@ Required properties: - clocks: The input clock of the USART instance Optional properties: -- pinctrl: The reference on the pins configuration +- pinctrl-names: Set to "default". An additional "sleep" state can be defined + to set pins in sleep state when in low power. In case the device is used as + a wakeup source, "idle" state is defined in order to keep RX pin active. + For a console device, an optional state "no_console_suspend" can be defined + to enable console messages during suspend. Typically, "no_console_suspend" and + "default" states can refer to the same pin configuration. +- pinctrl-n: Phandle(s) pointing to pin configuration nodes. + For Pinctrl properties see ../pinctrl/pinctrl-bindings.txt - st,hw-flow-ctrl: bool flag to enable hardware flow control. - rs485-rts-delay, rs485-rx-during-tx, rs485-rts-active-low, linux,rs485-enabled-at-boot-time: see rs485.txt. @@ -31,8 +38,11 @@ usart4: serial@40004c00 { reg = <0x40004c00 0x400>; interrupts = <52>; clocks = <&clk_pclk1>; - pinctrl-names = "default"; + pinctrl-names = "default", "sleep", "idle", "no_console_suspend"; pinctrl-0 = <&pinctrl_usart4>; + pinctrl-1 = <&pinctrl_usart4_sleep>; + pinctrl-2 = <&pinctrl_usart4_idle>; + pinctrl-3 = <&pinctrl_usart4>; }; usart2: serial@40004400 {