misc: pmic_esm: Add support for PMIC ESM driver

The ESM (Error Signal Monitor) is used on certain PMIC versions to
handle error signals propagating from rest of the system. If these
reach the PMIC, it is typically a last resort fatal error which
requires a system reset. The ESM driver does the proper configuration
for the ESM module to reach this end goal. Initially, only TPS65941
PMIC is supported for this.

Signed-off-by: Tero Kristo <t-kristo@ti.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/doc/device-tree-bindings/misc/esm-pmic.txt b/doc/device-tree-bindings/misc/esm-pmic.txt
new file mode 100644
index 0000000000..a60ad74679
--- /dev/null
+++ b/doc/device-tree-bindings/misc/esm-pmic.txt
@@ -0,0 +1,19 @@
+PMIC ESM Binding
+======================
+
+Certain Power Management ICs contain safety handling logic within them,
+allowing automatic reset of the board in case a safety error is signaled.
+For this purpose, ESM (Error Signal Monitor) is implemented within
+the PMIC running its own state machine.
+
+Required properties :
+- compatible	: "ti,tps659413-esm"
+
+Example
+=======
+
+&tps659413a {
+	esm: esm {
+		compatible = "ti,tps659413-esm";
+	};
+};