[bootlin/training-materials updates] master: Kernel labs: clarifications about uart2 and uart4 pin definitions (d588d9bc)

[Michael Opdenacker]

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/d588d9bc2af0ee3bd1755067c60853f63b68e5b5

>---------------------------------------------------------------

commit d588d9bc2af0ee3bd1755067c60853f63b68e5b5
Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
Date:   Tue Oct 27 11:28:16 2020 +0100

    Kernel labs: clarifications about uart2 and uart4 pin definitions
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at bootlin.com>


>---------------------------------------------------------------

d588d9bc2af0ee3bd1755067c60853f63b68e5b5
 labs/kernel-serial-iomem/kernel-serial-iomem.tex | 5 ++++-
 labs/kernel-serial-iomem/uarts-pinctrl.dts       | 1 -
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/labs/kernel-serial-iomem/kernel-serial-iomem.tex b/labs/kernel-serial-iomem/kernel-serial-iomem.tex
index dde7baaf..11a85ed9 100644
--- a/labs/kernel-serial-iomem/kernel-serial-iomem.tex
+++ b/labs/kernel-serial-iomem/kernel-serial-iomem.tex
@@ -47,7 +47,10 @@ as for the cable that you're using for the console:
 Now, create again a new
 \code{arch/arm/boot/dts/am335x-customboneblack.dts} file including
 the standard board DTS file and create a pin muxing section with
-declarations for UART2 and UART4:
+declarations for UART2 and UART4 (took the below definitions from
+\kfile{arch/arm/boot/dts/am335x-boneblue.dts} and
+\kfile{arch/arm/boot/dts/am335x-pocketbeagle.dts}, sharing the same
+SoC):
 
 {\scriptsize \sourcecode{labs/kernel-serial-iomem/uarts-pinctrl.dts}}
 
diff --git a/labs/kernel-serial-iomem/uarts-pinctrl.dts b/labs/kernel-serial-iomem/uarts-pinctrl.dts
index 1737131c..586b95f4 100644
--- a/labs/kernel-serial-iomem/uarts-pinctrl.dts
+++ b/labs/kernel-serial-iomem/uarts-pinctrl.dts
@@ -7,7 +7,6 @@ uart2_pins: uart2_pins {
 };
 
 /* Pins 11 (RX) and 13 (TX) of connector P9 */
-
 uart4_pins: uart4_pins {
 	pinctrl-single,pins = <
 		AM33XX_PADCONF(AM335X_PIN_GPMC_WAIT0, PIN_INPUT_PULLUP, MUX_MODE6)      /* (T17) gpmc_wait0.uart4_rxd */