From 5532b8a9ce0e80514e37a1e082824934663580a3 Mon Sep 17 00:00:00 2001 From: Vibhore Vardhan Date: Tue, 31 Dec 2024 14:44:19 +0530 Subject: [PATCH] arm64: dts: ti: k3-am62a-wakeup: Configure ti-sysc for wkup_uart0 Similar to the TI K3-AM62x SoC commit ce27f7f9e328c8582a169f97f1466976561f1 ("arm64: dts: ti: k3-am62-wakeup: Configure ti-sysc for wkup_uart0"), The devices in the wkup domain are capable of waking up the system from suspend. We can configure the wkup domain devices in a generic way using the ti-sysc interconnect target module driver like we have done with the earlier TI SoCs. As ti-sysc manages the SYSCONFIG related registers independent of the child hardware device, the wake-up configuration is also set even if wkup_uart0 is reserved by sysfw. The wkup_uart0 device has interconnect target module register mapping like dra7 wkup uart. There is a 1 MB interconnect target range with one uart IP block in the target module. The power domain and clock affects the whole interconnect target module. Note we change the functional clock name to follow the ti-sysc binding and use "fck" instead of "fclk". Also note that we need to disable the target module reset as noted by Markus. Otherwise the sysfw using wkup_uart0 can get confused on some devices leading to boot time issues such as mbox timeouts. Signed-off-by: Vibhore Vardhan Signed-off-by: Markus Schneider-Pargmann [d-gole@ti.com: Reworded the entire commit message] Signed-off-by: Dhruva Gole Link: https://lore.kernel.org/r/20241231-am62a-dt-ti-sysc-wkup-v1-1-a9b0d18a2649@ti.com Signed-off-by: Nishanth Menon --- arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi | 36 +++++++++++++++++---- 1 file changed, 29 insertions(+), 7 deletions(-) diff --git a/arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi index 0b1dd5390cd3..b2c8f5351743 100644 --- a/arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi @@ -2,9 +2,11 @@ /* * Device Tree Source for AM62A SoC Family Wakeup Domain peripherals * - * Copyright (C) 2022-2024 Texas Instruments Incorporated - https://www.ti.com/ + * Copyright (C) 2022-2025 Texas Instruments Incorporated - https://www.ti.com/ */ +#include + &cbass_wakeup { wkup_conf: bus@43000000 { compatible = "simple-bus"; @@ -38,14 +40,34 @@ }; }; - wkup_uart0: serial@2b300000 { - compatible = "ti,am64-uart", "ti,am654-uart"; - reg = <0x00 0x2b300000 0x00 0x100>; - interrupts = ; + target-module@2b300050 { + compatible = "ti,sysc-omap2", "ti,sysc"; + reg = <0 0x2b300050 0 0x4>, + <0 0x2b300054 0 0x4>, + <0 0x2b300058 0 0x4>; + reg-names = "rev", "sysc", "syss"; + ti,sysc-mask = <(SYSC_OMAP2_ENAWAKEUP | + SYSC_OMAP2_SOFTRESET | + SYSC_OMAP2_AUTOIDLE)>; + ti,sysc-sidle = , + , + , + ; + ti,syss-mask = <1>; + ti,no-reset-on-init; power-domains = <&k3_pds 114 TI_SCI_PD_EXCLUSIVE>; clocks = <&k3_clks 114 0>; - clock-names = "fclk"; - status = "disabled"; + clock-names = "fck"; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0 0 0x2b300000 0x100000>; + + wkup_uart0: serial@0 { + compatible = "ti,am64-uart", "ti,am654-uart"; + reg = <0 0x100>; + interrupts = ; + status = "disabled"; + }; }; wkup_i2c0: i2c@2b200000 { -- 2.25.1