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authorJohn Garry <john.garry@huawei.com>2018-05-08 12:27:32 +0200
committerWei Xu <xuwei5@hisilicon.com>2018-05-10 18:45:52 +0200
commitadf3457b4ce6940885be3e5ee832c6949fba4166 (patch)
tree19d261e454a1150ddcb5e8294c9b1ef6c7b354bb
parentHISI LPC: Re-Add ACPI child enumeration support (diff)
downloadlinux-adf3457b4ce6940885be3e5ee832c6949fba4166.tar.xz
linux-adf3457b4ce6940885be3e5ee832c6949fba4166.zip
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>
-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),
+ },
{}
};