web: BD12780: Add initial information

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>

Author: M-Vaittinen

BD12780/README.md

@@ -0,0 +1,43 @@
+---
+permalink: /BD12780/
+bindings:
+  - link: https://github.com/RohmSemiconductor/Linux-Kernel-PMIC-Drivers/blob/bd127x0-v0.1/Documentation/devicetree/bindings/hwmon/adi%2Cadm1275.yaml
+    linktext: BD12780 (and other similar ICs) binding documentation
+configs:
+  - config: CONFIG_SENSORS_ADM1275
+    subsystem: PMBus hwmon
+    description: enables driver supporting PMBus based hardware monitoring
+
+patchlink: https://lore.kernel.org/all/cover.1781591132.git.mazziesaccount@gmail.com/
+downstreamlink: https://github.com/RohmSemiconductor/Linux-Kernel-PMIC-Drivers/releases/tag/bd127x0-v0.1
+
+# ROHM BD12780 Hot-Swap controller Linux device drivers.
+
+The ROHM BD12780 is a Hot-Swap controller with PMBus Interface.
+It has load current, input voltage, output voltage, external
+N-channel FET power and temperature monitors via integrated
+12-bit ADC.
+
+The BD12780 controls the gate voltage of the
+external N-channel FET so that the load current is
+maintained around the current limit level. When the load
+current reaches the current limit threshold, the timer
+operates to limit the load current with the FET ON for the
+time determined by the capacitor connected to the
+TIMER pin. In addition, a constant power foldback
+scheme is used to control MOSFET power consumption
+in the event of a power-on or failure. This power limit
+keeps the FET within the safe operating area. When a
+short-circuit event occurs, the fast internal overcurrent
+detector responds within 320 ns and shuts down the gate
+of the external FET.
+
+## The device-tree
+
+{% include driverdt.md %}
+
+## Linux:
+
+{% include source_upstream_status.md %}
+
+{% include kernel_conf_tbl.md %}