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authorSuman Anna <s-anna@ti.com>2020-04-24 18:12:44 +0300
committerTony Lindgren <tony@atomide.com>2020-05-05 21:13:29 +0300
commit1f15980525c6425125678fc97ea8b4b1ee4cb86e (patch)
tree01374f338bf4ad2821a59d1f2ae90eb4d366a205
parentc2a5678e3017437c7c48fda0cbce1ec4136e2573 (diff)
downloadlinux-1f15980525c6425125678fc97ea8b4b1ee4cb86e.tar.xz
ARM: dts: dra7-ipu-dsp-common: Add watchdog timers to IPU and DSP nodes
The watchdog timer information has been added to all the IPU and DSP remote processor device nodes in the DRA7xx/AM57xx SoC families. The data has been added to the two common dra7-ipu-dsp-common and dra74-ipu-dsp-common dtsi files that can be included by all the desired board files. The following timers are chosen as the watchdog timers, as per the usage on the current firmware images: IPU2: GPTimers 4 & 9 (one for each Cortex-M4 core) IPU1: GPTimers 7 & 8 (one for each Cortex-M4 core) DSP1: GPTimer 10 DSP2: GPTimer 13 Each of the IPUs has two Cortex-M4 processors and so uses a timer each for providing watchdog support on that processor irrespective of whether the IPU is running in SMP-mode or non-SMP node. The chosen timers also need to be unique from the ones used by other processors (regular timers or watchdog timers) so that they can be supported simultaneously. The MPU-side drivers will use this data to initialize the watchdog timer(s), and listen for any watchdog triggers. The BIOS-side code on these processors needs to configure/refresh the corresponding timer properly to not throw a watchdog error. The watchdog timers are optional in general, but are mandatory to be added to support watchdog error recovery on a particular processor. These timers can be changed or removed as per the system integration needs, alongside appropriate equivalent changes on the firmware side. Signed-off-by: Angela Stegmaier <angelabaker@ti.com> Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
-rw-r--r--arch/arm/boot/dts/dra7-ipu-dsp-common.dtsi3
-rw-r--r--arch/arm/boot/dts/dra74-ipu-dsp-common.dtsi1
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/dra7-ipu-dsp-common.dtsi b/arch/arm/boot/dts/dra7-ipu-dsp-common.dtsi
index 23ce3b67faf7..a25749a1c365 100644
--- a/arch/arm/boot/dts/dra7-ipu-dsp-common.dtsi
+++ b/arch/arm/boot/dts/dra7-ipu-dsp-common.dtsi
@@ -23,14 +23,17 @@
&ipu2 {
mboxes = <&mailbox6 &mbox_ipu2_ipc3x>;
ti,timers = <&timer3>;
+ ti,watchdog-timers = <&timer4>, <&timer9>;
};
&ipu1 {
mboxes = <&mailbox5 &mbox_ipu1_ipc3x>;
ti,timers = <&timer11>;
+ ti,watchdog-timers = <&timer7>, <&timer8>;
};
&dsp1 {
mboxes = <&mailbox5 &mbox_dsp1_ipc3x>;
ti,timers = <&timer5>;
+ ti,watchdog-timers = <&timer10>;
};
diff --git a/arch/arm/boot/dts/dra74-ipu-dsp-common.dtsi b/arch/arm/boot/dts/dra74-ipu-dsp-common.dtsi
index a546cf740365..b1147a4b77f9 100644
--- a/arch/arm/boot/dts/dra74-ipu-dsp-common.dtsi
+++ b/arch/arm/boot/dts/dra74-ipu-dsp-common.dtsi
@@ -14,4 +14,5 @@
&dsp2 {
mboxes = <&mailbox6 &mbox_dsp2_ipc3x>;
ti,timers = <&timer6>;
+ ti,watchdog-timers = <&timer13>;
};