From: Lokesh Vutla <lokeshvutla@xxxxxx> 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@xxxxxx> Signed-off-by: Vignesh Raghavendra <vigneshr@xxxxxx> Signed-off-by: Adrien Ricciardi <aricciardi@xxxxxxxxxxxx> Signed-off-by: Julien Panis <jpanis@xxxxxxxxxxxx> --- 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 */ + }; +}; base-commit: fe15c26ee26efa11741a7b632e9f23b01aca4cc6 -- 2.37.3
