| Message ID | 20230428105453.110254-1-jpanis@baylibre.com |
|---|---|
| State | New |
| Headers | show |
| Series | arm: dts: Add am335x-boneblack-pps.dts | expand |
On Fri, Apr 28, 2023 at 6:00 AM Julien Panis <jpanis@baylibre.com> wrote: > > From: Lokesh Vutla <lokeshvutla@ti.com> > > Add a new am335x-boneblack-pps.dts that can be used to configure TIMER7 > in PWM mode. This PWM signal can be used as a PPS signal when > synchronized to PTP clock. Typically this synchronization is done by a > userspace program. This PPS signal can be observed on pin P8.8. > > Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> > Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> > Signed-off-by: Adrien Ricciardi <aricciardi@baylibre.com> > Signed-off-by: Julien Panis <jpanis@baylibre.com> > --- > arch/arm/boot/dts/Makefile | 1 + > arch/arm/boot/dts/am335x-boneblack-pps.dts | 25 ++++++++++++++++++++++ > 2 files changed, 26 insertions(+) > create mode 100644 arch/arm/boot/dts/am335x-boneblack-pps.dts > > diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile > index efe4152e5846..d74158aae72d 100644 > --- a/arch/arm/boot/dts/Makefile > +++ b/arch/arm/boot/dts/Makefile > @@ -939,6 +939,7 @@ dtb-$(CONFIG_SOC_AM33XX) += \ > am335x-base0033.dtb \ > am335x-bone.dtb \ > am335x-boneblack.dtb \ > + am335x-boneblack-pps.dtb \ > am335x-boneblack-wireless.dtb \ > am335x-boneblue.dtb \ > am335x-bonegreen.dtb \ > diff --git a/arch/arm/boot/dts/am335x-boneblack-pps.dts b/arch/arm/boot/dts/am335x-boneblack-pps.dts > new file mode 100644 > index 000000000000..88d2bc3fd759 > --- /dev/null > +++ b/arch/arm/boot/dts/am335x-boneblack-pps.dts > @@ -0,0 +1,25 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (C) 2023 Texas Instruments Incorporated - http://www.ti.com/ > + */ > + > +#include "am335x-boneblack.dts" > + > +&am33xx_pinmux { > + pwm7_pins: pinmux_pwm7_pins { > + pinctrl-single,pins = < > + AM33XX_PADCONF(AM335X_PIN_GPMC_OEN_REN, PIN_OUTPUT_PULLDOWN, MUX_MODE2) > + >; > + }; > +}; > + > +/{ > + pwm7: dmtimer-pwm7 { > + compatible = "ti,omap-dmtimer-pwm"; > + pinctrl-names = "default"; > + pinctrl-0 = <&pwm7_pins>; > + #pwm-cells = <3>; > + ti,timers = <&timer7>; > + ti,clock-source = <0x00>; /* timer_sys_ck */ > + }; > +}; I know this commit is pretty small, but mainline now has overlay support: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0fff0e49d72a53c51d8903fbadb2e6a84e531c4a At what point do we finally merge in the many dozen *BeagleBone* overlays, or do we still wait for : https://lore.kernel.org/lkml/20220328000915.15041-1-ansuelsmth@gmail.com/ Regards,
On Fri, Apr 28, 2023 at 9:44 AM Robert Nelson <robertcnelson@gmail.com> wrote: > > On Fri, Apr 28, 2023 at 6:00 AM Julien Panis <jpanis@baylibre.com> wrote: > > > > From: Lokesh Vutla <lokeshvutla@ti.com> > > > > Add a new am335x-boneblack-pps.dts that can be used to configure TIMER7 > > in PWM mode. This PWM signal can be used as a PPS signal when > > synchronized to PTP clock. Typically this synchronization is done by a > > userspace program. This PPS signal can be observed on pin P8.8. > > > > Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> > > Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> > > Signed-off-by: Adrien Ricciardi <aricciardi@baylibre.com> > > Signed-off-by: Julien Panis <jpanis@baylibre.com> > > --- > > arch/arm/boot/dts/Makefile | 1 + > > arch/arm/boot/dts/am335x-boneblack-pps.dts | 25 ++++++++++++++++++++++ > > 2 files changed, 26 insertions(+) > > create mode 100644 arch/arm/boot/dts/am335x-boneblack-pps.dts > > > > diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile > > index efe4152e5846..d74158aae72d 100644 > > --- a/arch/arm/boot/dts/Makefile > > +++ b/arch/arm/boot/dts/Makefile > > @@ -939,6 +939,7 @@ dtb-$(CONFIG_SOC_AM33XX) += \ > > am335x-base0033.dtb \ > > am335x-bone.dtb \ > > am335x-boneblack.dtb \ > > + am335x-boneblack-pps.dtb \ > > am335x-boneblack-wireless.dtb \ > > am335x-boneblue.dtb \ > > am335x-bonegreen.dtb \ > > diff --git a/arch/arm/boot/dts/am335x-boneblack-pps.dts b/arch/arm/boot/dts/am335x-boneblack-pps.dts > > new file mode 100644 > > index 000000000000..88d2bc3fd759 > > --- /dev/null > > +++ b/arch/arm/boot/dts/am335x-boneblack-pps.dts > > @@ -0,0 +1,25 @@ > > +// SPDX-License-Identifier: GPL-2.0-only > > +/* > > + * Copyright (C) 2023 Texas Instruments Incorporated - http://www.ti.com/ > > + */ > > + > > +#include "am335x-boneblack.dts" > > + > > +&am33xx_pinmux { > > + pwm7_pins: pinmux_pwm7_pins { > > + pinctrl-single,pins = < > > + AM33XX_PADCONF(AM335X_PIN_GPMC_OEN_REN, PIN_OUTPUT_PULLDOWN, MUX_MODE2) > > + >; > > + }; > > +}; > > + > > +/{ > > + pwm7: dmtimer-pwm7 { > > + compatible = "ti,omap-dmtimer-pwm"; > > + pinctrl-names = "default"; > > + pinctrl-0 = <&pwm7_pins>; > > + #pwm-cells = <3>; > > + ti,timers = <&timer7>; > > + ti,clock-source = <0x00>; /* timer_sys_ck */ > > + }; > > +}; > > I know this commit is pretty small, but mainline now has overlay support: > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0fff0e49d72a53c51d8903fbadb2e6a84e531c4a > > At what point do we finally merge in the many dozen *BeagleBone* > overlays, or do we still wait for : > https://lore.kernel.org/lkml/20220328000915.15041-1-ansuelsmth@gmail.com/ OH SIde note, #2... thanks @Nishanth Menon ! We do have this example: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8e01fb15b8157a825d309ea2598b494dd81a7b42 So instead of `am335x-boneblack-pps.dtb` it could be: .... am335x-bone-dmtimer-pwm7.dtbo or even am335x-dmtimer-pwm7.dtbo ? Thoughts?
Hi, * Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> [230428 13:50]: > On 28/04/2023 12:54, Julien Panis wrote: > > From: Lokesh Vutla <lokeshvutla@ti.com> > > + compatible = "ti,omap-dmtimer-pwm"; > > + pinctrl-names = "default"; > > + pinctrl-0 = <&pwm7_pins>; > > + #pwm-cells = <3>; > > + ti,timers = <&timer7>; > > + ti,clock-source = <0x00>; /* timer_sys_ck */ > > Why this is hex? Should be just 0/1/2? I think the ti,clock-source can be left out now, this can be done with assigned-clocks and parents instead. Please grep for some examples in the current mainline kernel dts files. Regards, Tony
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile index efe4152e5846..d74158aae72d 100644 --- a/arch/arm/boot/dts/Makefile +++ b/arch/arm/boot/dts/Makefile @@ -939,6 +939,7 @@ dtb-$(CONFIG_SOC_AM33XX) += \ am335x-base0033.dtb \ am335x-bone.dtb \ am335x-boneblack.dtb \ + am335x-boneblack-pps.dtb \ am335x-boneblack-wireless.dtb \ am335x-boneblue.dtb \ am335x-bonegreen.dtb \ diff --git a/arch/arm/boot/dts/am335x-boneblack-pps.dts b/arch/arm/boot/dts/am335x-boneblack-pps.dts new file mode 100644 index 000000000000..88d2bc3fd759 --- /dev/null +++ b/arch/arm/boot/dts/am335x-boneblack-pps.dts @@ -0,0 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2023 Texas Instruments Incorporated - http://www.ti.com/ + */ + +#include "am335x-boneblack.dts" + +&am33xx_pinmux { + pwm7_pins: pinmux_pwm7_pins { + pinctrl-single,pins = < + AM33XX_PADCONF(AM335X_PIN_GPMC_OEN_REN, PIN_OUTPUT_PULLDOWN, MUX_MODE2) + >; + }; +}; + +/{ + pwm7: dmtimer-pwm7 { + compatible = "ti,omap-dmtimer-pwm"; + pinctrl-names = "default"; + pinctrl-0 = <&pwm7_pins>; + #pwm-cells = <3>; + ti,timers = <&timer7>; + ti,clock-source = <0x00>; /* timer_sys_ck */ + }; +};