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From: Pierre Gondois <Pierre.Gondois@arm.com>
To: linux-kernel@vger.kernel.org
Cc: Thanu Rangarajan <Thanu.Rangarajan@arm.com>,
	Sami Mujawar <Sami.Mujawar@arm.com>,
	Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com>,
	Andre Przywara <andre.przywara@arm.com>,
	Rob Herring <rob.herring@arm.com>,
	stable@vger.kernel.org, Russell King <linux@armlinux.org.uk>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jiri Slaby <jirislaby@kernel.org>,
	linux-serial@vger.kernel.org
Subject: [PATCH v1] serial: pl011: Add ACPI SBSA UART match id
Date: Tue,  9 Nov 2021 17:22:48 +0000	[thread overview]
Message-ID: <20211109172248.19061-1-Pierre.Gondois@arm.com> (raw)

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@vger.kernel.org>
Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
---
 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);
-- 
2.17.1


                 reply	other threads:[~2021-11-09 17:24 UTC|newest]

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