| Message ID | 20200827072101.26588-4-arnaud.pouliquen@st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ARM: stm32: add DT properties for remote proc synchronisation | expand |
Hello Arnaud, On 8/27/20 9:21 AM, Arnaud Pouliquen wrote: > Two backup registers are used to store the Cortex-M4 state and the resource > table address. > Declare the tamp node and add associated properties in m4_rproc node > to allow Linux to attach to a firmware loaded by the first boot stages. > > Associated driver implementation is available in commit 9276536f455b3 > ("remoteproc: stm32: Parse syscon that will manage M4 synchronisation"). > > Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> > --- > arch/arm/boot/dts/stm32mp151.dtsi | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi > index bfe29023fbd5..842ecffae73a 100644 > --- a/arch/arm/boot/dts/stm32mp151.dtsi > +++ b/arch/arm/boot/dts/stm32mp151.dtsi > @@ -1541,6 +1541,11 @@ > status = "disabled"; > }; > > + tamp: tamp@5c00a000 { > + compatible = "st,stm32-tamp", "syscon"; > + reg = <0x5c00a000 0x400>; > + }; > + Just saw this now. I have a pending patch adding this node as well: https://lore.kernel.org/patchwork/patch/1306971/ For my use case, I need a "simple-mfd" compatible to allow child nodes to be probed. Could you CC me when you send out your v2, so I can rebase? (Or if you don't mind, just add the "simple-mfd" into the compatible list yourself :-) Cheers Ahmad > /* > * Break node order to solve dependency probe issue between > * pinctrl and exti. > @@ -1717,6 +1722,8 @@ > st,syscfg-holdboot = <&rcc 0x10C 0x1>; > st,syscfg-tz = <&rcc 0x000 0x1>; > st,syscfg-pdds = <&pwr_mcu 0x0 0x1>; > + st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>; > + st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>; > status = "disabled"; > }; > }; >
Hi Ahmad, On 9/24/20 7:45 AM, Ahmad Fatoum wrote: > Hello Arnaud, > > On 8/27/20 9:21 AM, Arnaud Pouliquen wrote: >> Two backup registers are used to store the Cortex-M4 state and the resource >> table address. >> Declare the tamp node and add associated properties in m4_rproc node >> to allow Linux to attach to a firmware loaded by the first boot stages. >> >> Associated driver implementation is available in commit 9276536f455b3 >> ("remoteproc: stm32: Parse syscon that will manage M4 synchronisation"). >> >> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> >> --- >> arch/arm/boot/dts/stm32mp151.dtsi | 7 +++++++ >> 1 file changed, 7 insertions(+) >> >> diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi >> index bfe29023fbd5..842ecffae73a 100644 >> --- a/arch/arm/boot/dts/stm32mp151.dtsi >> +++ b/arch/arm/boot/dts/stm32mp151.dtsi >> @@ -1541,6 +1541,11 @@ >> status = "disabled"; >> }; >> >> + tamp: tamp@5c00a000 { >> + compatible = "st,stm32-tamp", "syscon"; >> + reg = <0x5c00a000 0x400>; >> + }; >> + > > Just saw this now. I have a pending patch adding this node as well: > https://lore.kernel.org/patchwork/patch/1306971/ > > For my use case, I need a "simple-mfd" compatible to allow child > nodes to be probed. > > Could you CC me when you send out your v2, so I can rebase? > (Or if you don't mind, just add the "simple-mfd" into the compatible > list yourself :-) I prefer that you propose the "simple-mfd" compatibility. I do not master the consequence of adding it... I will add you in cc of my v2 , but as your patch could trig some discussions I would suggest to send in advance a patchset including this patch and your patch on top of, just add a reference to this series in the cover letter and explain potential impact (or non impact) on the legacy. Regards, Arnaud > > Cheers > Ahmad > >> /* >> * Break node order to solve dependency probe issue between >> * pinctrl and exti. >> @@ -1717,6 +1722,8 @@ >> st,syscfg-holdboot = <&rcc 0x10C 0x1>; >> st,syscfg-tz = <&rcc 0x000 0x1>; >> st,syscfg-pdds = <&pwr_mcu 0x0 0x1>; >> + st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>; >> + st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>; >> status = "disabled"; >> }; >> }; >> >
diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi index bfe29023fbd5..842ecffae73a 100644 --- a/arch/arm/boot/dts/stm32mp151.dtsi +++ b/arch/arm/boot/dts/stm32mp151.dtsi @@ -1541,6 +1541,11 @@ status = "disabled"; }; + tamp: tamp@5c00a000 { + compatible = "st,stm32-tamp", "syscon"; + reg = <0x5c00a000 0x400>; + }; + /* * Break node order to solve dependency probe issue between * pinctrl and exti. @@ -1717,6 +1722,8 @@ st,syscfg-holdboot = <&rcc 0x10C 0x1>; st,syscfg-tz = <&rcc 0x000 0x1>; st,syscfg-pdds = <&pwr_mcu 0x0 0x1>; + st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>; + st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>; status = "disabled"; }; };
Two backup registers are used to store the Cortex-M4 state and the resource table address. Declare the tamp node and add associated properties in m4_rproc node to allow Linux to attach to a firmware loaded by the first boot stages. Associated driver implementation is available in commit 9276536f455b3 ("remoteproc: stm32: Parse syscon that will manage M4 synchronisation"). Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> --- arch/arm/boot/dts/stm32mp151.dtsi | 7 +++++++ 1 file changed, 7 insertions(+)