Commit adf3457b authored May 08, 2018 by John Garry Committed by Wei Xu May 10, 2018

HISI LPC: Add ACPI UART support



On the Huawei D03 development board the system UART is
the UART connected on the LPC bus.

The profile for the device driver required for this HW
is as follows:
 - platform driver
 - 16550
 - ACPI support
 - polling mode support
 - IO space support

In principle we should use the PNP driver (8250_dw.c) for
8250-devices with ACPI FW. However since this driver does
not support PNP devices, and modifying the PNP core code
to support it is not worth the effort, use the generic
8250 isa driver.

For this, we setup the pdev platform data for the serial
8250 port.

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

parent 99c0228d

drivers/bus/hisi_lpc.c

+17 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@
		#include <linux/of_address.h>
		#include <linux/of_platform.h>
		#include <linux/pci.h>
		#include <linux/serial_8250.h>
		#include <linux/slab.h>

		#define DRV_NAME "hisi-lpc"
		@@ -493,6 +494,22 @@ static int hisi_lpc_acpi_probe(struct device *hostdev)
		.hid = "IPI0001",
		.name = "hisi-lpc-ipmi",
		},
		/* 8250-compatible uart */
		{
		.hid = "HISI1031",
		.name = "serial8250",
		.pdata = (struct plat_serial8250_port []) {
		{
		.iobase = res->start,
		.uartclk = 1843200,
		.iotype = UPIO_PORT,
		.flags = UPF_BOOT_AUTOCONF,
		},
		{}
		},
		.pdata_size = 2 *
		sizeof(struct plat_serial8250_port),
		},
		{}
		};

Admin message