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Commit 7e01b1ba authored by Feng Kan's avatar Feng Kan Committed by Sasha Levin
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serial: 8250: add support for ACPI-probed serial port for X-Gene platform 



[ Upstream commit 5e1aeea52f6a0763e79473b1767401fda88eb7e1 ]

Enable APM X-Gene SoC serial port functionality when using ACPI table to
initialize serial port.

Signed-off-by: default avatarFeng Kan <fkan@apm.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
parent 78084132

drivers/tty/serial/8250/8250_dw.c

+11 −0
Original line number Diff line number Diff line
@@ -316,10 +316,20 @@ static int dw8250_probe_of(struct uart_port *p, 
static int dw8250_probe_acpi(struct uart_8250_port *up,

			     struct dw8250_data *data)

{

	const struct acpi_device_id *id;

	struct uart_port *p = &up->port;



	dw8250_setup_port(up);



	id = acpi_match_device(p->dev->driver->acpi_match_table, p->dev);

	if (!id)

		return -ENODEV;



	if (!p->uartclk)

		if (device_property_read_u32(p->dev, "clock-frequency",

					     &p->uartclk))

			return -EINVAL;



	p->iotype = UPIO_MEM32;

	p->serial_in = dw8250_serial_in32;

	p->serial_out = dw8250_serial_out32;
@@ -542,6 +552,7 @@ static const struct acpi_device_id dw8250_acpi_match[] = { 
	{ "INT3435", 0 },

	{ "80860F0A", 0 },

	{ "8086228A", 0 },

	{ "APMC0D08", 0},

	{ },

};

MODULE_DEVICE_TABLE(acpi, dw8250_acpi_match);