linux-kernel - [PATCH] serial: 8250_dw: Add device HID for new AMD UART controller

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Message-Id: <20210512210413.1982933-1-luzmaximilian@gmail.com>
Date:   Wed, 12 May 2021 23:04:13 +0200
From:   Maximilian Luz <luzmaximilian@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Maximilian Luz <luzmaximilian@...il.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-serial@...r.kernel.org, stable@...r.kernel.org,
        Sachi King <nakato@...ato.io>
Subject: [PATCH] serial: 8250_dw: Add device HID for new AMD UART controller

Add device HID AMDI0022 to the AMD UART controller driver match table
and create a platform device for it. This controller can be found on
Microsoft Surface Laptop 4 devices and seems similar enough that we can
just copy the existing AMDI0020 entries.

Cc: <stable@...r.kernel.org> # 5.10+
Tested-by: Sachi King <nakato@...ato.io>
Signed-off-by: Maximilian Luz <luzmaximilian@...il.com>
---
 drivers/acpi/acpi_apd.c           | 1 +
 drivers/tty/serial/8250/8250_dw.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
index 0ec5b3f69112..6e02448d15d9 100644
--- a/drivers/acpi/acpi_apd.c
+++ b/drivers/acpi/acpi_apd.c
@@ -226,6 +226,7 @@ static const struct acpi_device_id acpi_apd_device_ids[] = {
 	{ "AMDI0010", APD_ADDR(wt_i2c_desc) },
 	{ "AMD0020", APD_ADDR(cz_uart_desc) },
 	{ "AMDI0020", APD_ADDR(cz_uart_desc) },
+	{ "AMDI0022", APD_ADDR(cz_uart_desc) },
 	{ "AMD0030", },
 	{ "AMD0040", APD_ADDR(fch_misc_desc)},
 	{ "HYGO0010", APD_ADDR(wt_i2c_desc) },
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 9e204f9b799a..a3a0154da567 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -714,6 +714,7 @@ static const struct acpi_device_id dw8250_acpi_match[] = {
 	{ "APMC0D08", 0},
 	{ "AMD0020", 0 },
 	{ "AMDI0020", 0 },
+	{ "AMDI0022", 0 },
 	{ "BRCM2032", 0 },
 	{ "HISI0031", 0 },
 	{ },
-- 
2.31.1