Add a reset driver framework/uclass
A reset controller is a hardware module that controls reset signals that
affect other hardware modules or chips.
This patch defines a standard API that connects reset clients (i.e. the
drivers for devices affected by reset signals) to drivers for reset
controllers/providers. Initially, DT is the only supported method for
connecting the two.
The DT binding specification (reset.txt) was taken from Linux kernel
v4.5's Documentation/devicetree/bindings/reset/reset.txt.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
new file mode 100644
index 0000000..5c449a9
--- /dev/null
+++ b/drivers/reset/Kconfig
@@ -0,0 +1,15 @@
+menu "Reset Controller Support"
+
+config DM_RESET
+ bool "Enable reset controllers using Driver Model"
+ depends on DM && OF_CONTROL
+ help
+ Enable support for the reset controller driver class. Many hardware
+ modules are equipped with a reset signal, typically driven by some
+ reset controller hardware module within the chip. In U-Boot, reset
+ controller drivers allow control over these reset signals. In some
+ cases this API is applicable to chips outside the CPU as well,
+ although driving such reset isgnals using GPIOs may be more
+ appropriate in this case.
+
+endmenu