[bootlin/training-materials updates] master: kernel: i2c: Clarify SMBus concept (cf2bf93f)

[Miquel Raynal]

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/cf2bf93fac52f87f2efc39110b741f03b2b72df6

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commit cf2bf93fac52f87f2efc39110b741f03b2b72df6
Author: Miquel Raynal <miquel.raynal at bootlin.com>
Date:   Mon Nov 15 10:43:38 2021 +0100

    kernel: i2c: Clarify SMBus concept
    
    SMBus does not feature any kind of registers, this is our way to
    interpret the specification, so use " " around the word register because
    it's actually just a command that will be interpreted by the device.
    
    Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>


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cf2bf93fac52f87f2efc39110b741f03b2b72df6
 slides/kernel-i2c/kernel-i2c.tex | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/slides/kernel-i2c/kernel-i2c.tex b/slides/kernel-i2c/kernel-i2c.tex
index 5a459b85..4a6e732e 100644
--- a/slides/kernel-i2c/kernel-i2c.tex
+++ b/slides/kernel-i2c/kernel-i2c.tex
@@ -371,12 +371,13 @@ From \kfile{drivers/input/touchscreen/st1232.c}
       core
     \end{itemize}
   \item Example: the \kfunc{i2c_smbus_read_byte_data} function allows
-    to read one byte of data from a device register.
+    to read one byte of data from a device ``register''.
     \begin{itemize}
     \item It does the following operations:
       \code{S Addr Wr [A] Comm [A] S Addr Rd [A] [Data] NA P}
     \item Which means it first writes a one byte data command ({\em
-        Comm}), and then reads back one byte of data ({\em [Data]}).
+        Comm}, which is the ``register'' address), and then reads
+      back one byte of data ({\em [Data]}).
     \end{itemize}
   \item See \kdochtml{i2c/smbus-protocol} for details.
   \end{itemize}