From: Pierre Gondois Pierre.Gondois@arm.com
stable inclusion from linux-4.19.220 commit d3dbf51a923755fdf3c097fddb35cd098e77ce7a
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commit ac442a077acf9a6bf1db4320ec0c3f303be092b3 upstream.
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 Link: https://lore.kernel.org/r/20211109172248.19061-1-Pierre.Gondois@arm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yang Yingliang yangyingliang@huawei.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 35b86a2d5ddba..1d27e006826d2 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -2839,6 +2839,7 @@ MODULE_DEVICE_TABLE(of, sbsa_uart_of_match);
static const struct acpi_device_id sbsa_uart_acpi_match[] = { { "ARMH0011", 0 }, + { "ARMHB000", 0 }, {}, }; MODULE_DEVICE_TABLE(acpi, sbsa_uart_acpi_match);