From 927570f0a3d0ea82d5b6a3bc3b175ace3ad45e66 Mon Sep 17 00:00:00 2001 From: Sander Vanheule Date: Sun, 14 Nov 2021 19:45:33 +0100 Subject: [PATCH] realtek: Add and enable watchdog node Add and enable the Realtek Otto WDT peripheral found on these SoCs. Default all devices to use standard (cold) reboot and "soc" resets. Devices that require the PLL value fixup before restarting, should pick the "cpu" or "software" reset mode. These devices also need to provide a custom reboot mode, by adding the reboot argument to the kernel command line: WDT reset mode | kernel reboot mode ----------------+--------------------------------------- soc | reboot=cold (default if not specified) cpu | reboot=warm software | reboot=software Preferrably, these devices should use an alternative restart method like gpio-restart to provide reliable restarts. Note that watchdog restarts are not yet exposed, since the _machine_restart override is still present. Signed-off-by: Sander Vanheule Tested-by: Stijn Segers Tested-by: Paul Fertser Tested-by: Stijn Tintel --- target/linux/realtek/config-5.10 | 2 ++ target/linux/realtek/dts-5.10/rtl838x.dtsi | 14 ++++++++++++++ target/linux/realtek/dts-5.10/rtl930x.dtsi | 18 +++++++++++++++++- 3 files changed, 33 insertions(+), 1 deletion(-) diff --git a/target/linux/realtek/config-5.10 b/target/linux/realtek/config-5.10 index 2c5ab1706a..00f2a6af13 100644 --- a/target/linux/realtek/config-5.10 +++ b/target/linux/realtek/config-5.10 @@ -160,6 +160,7 @@ CONFIG_PINCTRL=y CONFIG_POWER_RESET=y CONFIG_POWER_RESET_SYSCON=y CONFIG_RATIONAL=y +CONFIG_REALTEK_OTTO_WDT=y CONFIG_REALTEK_PHY=y CONFIG_REALTEK_SOC_PHY=y CONFIG_REGMAP=y @@ -190,5 +191,6 @@ CONFIG_TIMER_PROBE=y CONFIG_TINY_SRCU=y CONFIG_USE_GENERIC_EARLY_PRINTK_8250=y CONFIG_USE_OF=y +CONFIG_WATCHDOG_CORE=y CONFIG_ZLIB_DEFLATE=y CONFIG_ZLIB_INFLATE=y diff --git a/target/linux/realtek/dts-5.10/rtl838x.dtsi b/target/linux/realtek/dts-5.10/rtl838x.dtsi index dc60e12bad..f356f8fcde 100644 --- a/target/linux/realtek/dts-5.10/rtl838x.dtsi +++ b/target/linux/realtek/dts-5.10/rtl838x.dtsi @@ -153,6 +153,20 @@ status = "disabled"; }; + watchdog0: watchdog@3150 { + compatible = "realtek,rtl8380-wdt"; + reg = <0x3150 0xc>; + + realtek,reset-mode = "soc"; + + clocks = <&lx_clk>; + timeout-sec = <30>; + + interrupt-parent = <&intc>; + interrupt-names = "phase1", "phase2"; + interrupts = <19>, <18>; + }; + gpio0: gpio-controller@3500 { compatible = "realtek,rtl8380-gpio", "realtek,otto-gpio"; reg = <0x3500 0x20>; diff --git a/target/linux/realtek/dts-5.10/rtl930x.dtsi b/target/linux/realtek/dts-5.10/rtl930x.dtsi index 9e9501d51a..a4c9757505 100644 --- a/target/linux/realtek/dts-5.10/rtl930x.dtsi +++ b/target/linux/realtek/dts-5.10/rtl930x.dtsi @@ -109,7 +109,9 @@ <10 &cpuintc 1>, /* TC3 */ <9 &cpuintc 1>, /* TC2 */ <8 &cpuintc 1>, /* TC1 */ - <7 &cpuintc 5>; /* TC0 */ + <7 &cpuintc 5>, /* TC0 */ + <6 &cpuintc 5>, /* WDT_IP2 */ + <5 &cpuintc 4>; /* WDT_IP1 */ }; timer: timer@3200 { @@ -161,6 +163,20 @@ status = "disabled"; }; + watchdog0: watchdog@3260 { + compatible = "realtek,rtl9300-wdt"; + reg = <0x3260 0xc>; + + realtek,reset-mode = "soc"; + + clocks = <&lx_clk>; + timeout-sec = <30>; + + interrupt-parent = <&intc>; + interrupt-names = "phase1", "phase2"; + interrupts = <5>, <6>; + }; + gpio0: gpio-controller@3500 { compatible = "realtek,rtl8380-gpio", "realtek,otto-gpio"; reg = <0x3500 0x20>;