diff options
| author | John Garry <john.garry@huawei.com> | 2018-05-08 12:27:32 +0200 |
|---|---|---|
| committer | Wei Xu <xuwei5@hisilicon.com> | 2018-05-10 18:45:52 +0200 |
| commit | adf3457b4ce6940885be3e5ee832c6949fba4166 (patch) | |
| tree | 19d261e454a1150ddcb5e8294c9b1ef6c7b354bb /drivers/bus | |
| parent | HISI LPC: Re-Add ACPI child enumeration support (diff) | |
| download | linux-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>
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/hisi_lpc.c | 17 |
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), + }, {} }; |