dm: Add a system reset uclass
It is common for system reset to be available at multiple levels in modern
hardware. For example, an SoC may provide a reset option, and a board may
provide its own reset for reasons of security or thoroughness. It is useful
to be able to model this hardware without hard-coding the behaviour in the
SoC or board. Also there is a distinction sometimes between resetting just
the CPU (leaving GPIO state alone) and resetting all the PMICs, just cutting
power.
To achieve this, add a simple system reset uclass. It allows multiple devices
to provide reset functionality and provides a way to walk through them,
requesting a particular reset type until is it provided.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index 93a3857..b993fc0 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -44,6 +44,7 @@
UCLASS_PCI_GENERIC, /* Generic PCI bus device */
UCLASS_PMIC, /* PMIC I/O device */
UCLASS_REGULATOR, /* Regulator device */
+ UCLASS_RESET, /* Reset device */
UCLASS_RTC, /* Real time clock device */
UCLASS_SERIAL, /* Serial UART */
UCLASS_SPI, /* SPI bus */