rust: io: fix example in `register!` macro

In this example, an u32 register is split in two u8 in big-endian order,
but the high byte is actually defined as taking nine bits instead of
eight.

This is completely inconsequential, as I expect most users will just
copy the bit ranges from their datasheets, but it doesn’t hurt to fix
that typo.

Signed-off-by: Link Mauve <linkmauve@linkmauve.fr>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20260701160357.29031-1-linkmauve@linkmauve.fr
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/rust/kernel/io/register.rs b/rust/kernel/io/register.rs
index f924c7c7c1db..66449377a0b7 100644
--- a/rust/kernel/io/register.rs
+++ b/rust/kernel/io/register.rs
@@ -448,7 +448,7 @@ where
 ///
 /// register! {
 ///     FIXED_REG(u32) @ 0x100 {
-///         16:8 high_byte;
+///         15:8 high_byte;
 ///         7:0  low_byte;
 ///     }
 /// }