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authorJohn Garry <john.garry@huawei.com>2018-05-08 18:27:32 +0800
committerWei Xu <xuwei5@hisilicon.com>2018-05-10 17:45:52 +0100
commitadf3457b4ce6940885be3e5ee832c6949fba4166 (patch)
tree19d261e454a1150ddcb5e8294c9b1ef6c7b354bb /drivers/bus
parent99c0228d6ff1fabdd56fa78c2283b5b155fa8664 (diff)
downloadlinux-adf3457b4ce6940885be3e5ee832c6949fba4166.tar.bz2
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>
Diffstat (limited to 'drivers/bus')
-rw-r--r--drivers/bus/hisi_lpc.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/bus/hisi_lpc.c b/drivers/bus/hisi_lpc.c
index eb5b3fc186e0..d5f85455fa62 100644
--- a/drivers/bus/hisi_lpc.c
+++ b/drivers/bus/hisi_lpc.c
@@ -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),
+ },
{}
};