Patch "Revert "tty: serial: fsl_lpuart: drop earlycon entry for i.MX8QXP"" has been added to the 4.19-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    Revert "tty: serial: fsl_lpuart: drop earlycon entry for i.MX8QXP"

to the 4.19-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     revert-tty-serial-fsl_lpuart-drop-earlycon-entry-for.patch
and it can be found in the queue-4.19 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 0e476e5456507fda60380b9d99aad7ba6a34c510
Author: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
Date:   Wed Nov 24 08:31:09 2021 +0100

    Revert "tty: serial: fsl_lpuart: drop earlycon entry for i.MX8QXP"
    
    [ Upstream commit 4e9679738a918d8a482ac6a2cb2bb871f094bb84 ]
    
    Revert commit b4b844930f27 ("tty: serial: fsl_lpuart: drop earlycon entry
    for i.MX8QXP"), because this breaks earlycon support on imx8qm/imx8qxp.
    While it is true that for earlycon there is no difference between
    i.MX8QXP and i.MX7ULP (for now at least), there are differences
    regarding clocks and fixups for wakeup support. For that reason it was
    deemed unacceptable to add the imx7ulp compatible to device tree in
    order to get earlycon working again.
    
    Reviewed-by: Peng Fan <peng.fan@xxxxxxx>
    Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20211124073109.805088-1-alexander.stein@xxxxxxxxxxxxxxx
    Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
    Stable-dep-of: e0edfdc15863 ("tty: serial: fsl_lpuart: add earlycon for imx8ulp platform")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 36321d810d36f..573086aac2c82 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -2136,6 +2136,7 @@ static int __init lpuart32_imx_early_console_setup(struct earlycon_device *devic
 OF_EARLYCON_DECLARE(lpuart, "fsl,vf610-lpuart", lpuart_early_console_setup);
 OF_EARLYCON_DECLARE(lpuart32, "fsl,ls1021a-lpuart", lpuart32_early_console_setup);
 OF_EARLYCON_DECLARE(lpuart32, "fsl,imx7ulp-lpuart", lpuart32_imx_early_console_setup);
+OF_EARLYCON_DECLARE(lpuart32, "fsl,imx8qxp-lpuart", lpuart32_imx_early_console_setup);
 EARLYCON_DECLARE(lpuart, lpuart_early_console_setup);
 EARLYCON_DECLARE(lpuart32, lpuart32_early_console_setup);