2019-10-12 10:08:35

by Xingyu Chen

Subject: [PATCH 0/4] add meson secure watchdog driver

The watchdog controller on the Meson-A/C series SoCs is moved to secure world,
We have to call SMC instruction to trap the ATF for watchdog operation. These
operations are different from previous SoCs, so we introduce a new watchdog
driver to support this kind of SoCs.

Xingyu Chen (4):
firmware: meson_sm: add new SMC ID support for accessing secure
watchdog
dt-bindings: watchdog: add new binding for meson secure watchdog
watchdog: add meson secure watchdog driver
arm64: dts: a1: add secure watchdog controller

.../bindings/watchdog/amlogic,meson-sec-wdt.yaml | 34 ++++
arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 6 +
drivers/firmware/meson/meson_sm.c | 1 +
drivers/watchdog/Kconfig | 16 ++
drivers/watchdog/Makefile | 1 +
drivers/watchdog/meson_sec_wdt.c | 205 +++++++++++++++++++++
include/linux/firmware/meson/meson_sm.h | 1 +
7 files changed, 264 insertions(+)
create mode 100644 Documentation/devicetree/bindings/watchdog/amlogic,meson-sec-wdt.yaml
create mode 100644 drivers/watchdog/meson_sec_wdt.c

--
2.7.4

2019-10-12 10:08:58

by Xingyu Chen

Subject: [PATCH 4/4] arm64: dts: a1: add secure watchdog controller

Enable secure watchdog controller for Meson-A1 SoC

Signed-off-by: Xingyu Chen <[email protected]>
---
arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
index 7210ad0..047c323 100644
--- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
@@ -93,6 +93,12 @@
clock-names = "xtal", "pclk", "baud";
status = "disabled";
};
+
+ watchdog {
+ compatible = "amlogic,meson-sec-wdt";
+ secure-monitor = <&sm>;
+ status = "okay";
+ };
};

gic: interrupt-controller@ff901000 {
--
2.7.4