This is a note to let you know that I've just added the patch titled
serial: pl011: Add ACPI SBSA UART match id
to my tty git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
in the tty-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
>From ac442a077acf9a6bf1db4320ec0c3f303be092b3 Mon Sep 17 00:00:00 2001
From: Pierre Gondois <Pierre.Gondois@xxxxxxx>
Date: Tue, 9 Nov 2021 17:22:48 +0000
Subject: serial: pl011: Add ACPI SBSA UART match id
The document 'ACPI for Arm Components 1.0' defines the following
_HID mappings:
-'Prime cell UART (PL011)': ARMH0011
-'SBSA UART': ARMHB000
Use the sbsa-uart driver when a device is described with
the 'ARMHB000' _HID.
Note:
PL011 devices currently use the sbsa-uart driver instead of the
uart-pl011 driver. Indeed, PL011 devices are not bound to a clock
in ACPI. It is not possible to change their baudrate.
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Pierre Gondois <Pierre.Gondois@xxxxxxx>
Link: https://lore.kernel.org/r/20211109172248.19061-1-Pierre.Gondois@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/serial/amba-pl011.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index d361cd84ff8c..52518a606c06 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -2947,6 +2947,7 @@ MODULE_DEVICE_TABLE(of, sbsa_uart_of_match);
static const struct acpi_device_id __maybe_unused sbsa_uart_acpi_match[] = {
{ "ARMH0011", 0 },
+ { "ARMHB000", 0 },
{},
};
MODULE_DEVICE_TABLE(acpi, sbsa_uart_acpi_match);
--
2.34.0
