ARM: 9480/1: entry: expand comment in __switch_tografted

As per discussion between the developers in the mail thread
linked, expand the comment in __switch_to so that readers
of the code understand what is going on.

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

1 files changed, 35 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/debugfs-moxtet b/Documentation/ABI/testing/debugfs-moxtet
new file mode 100644
index 000000000..637d8587d
--- /dev/null
+++ b/Documentation/ABI/testing/debugfs-moxtet
@@ -0,0 +1,35 @@
+What:		/sys/kernel/debug/moxtet/input
+Date:		March 2019
+KernelVersion:	5.3
+Contact:	Marek Behún <kabel@kernel.org>
+Description:	(Read) Read input from the shift registers, in hexadecimal.
+		Returns N+1 bytes, where N is the number of Moxtet connected
+		modules. The first byte is from the CPU board itself.
+
+		Example::
+
+			101214
+
+		==  =======================================
+		10  CPU board with SD card
+		12  2 = PCIe module, 1 = IRQ not active
+		14  4 = Peridot module, 1 = IRQ not active
+		==  =======================================
+
+What:		/sys/kernel/debug/moxtet/output
+Date:		March 2019
+KernelVersion:	5.3
+Contact:	Marek Behún <kabel@kernel.org>
+Description:	(RW) Read last written value to the shift registers, in
+		hexadecimal, or write values to the shift registers, also
+		in hexadecimal.
+
+		Example::
+
+		    0102
+
+		==  ================================================
+		01  01 was last written, or is to be written, to the
+		    first module's shift register
+		02  the same for second module
+		==  ================================================