reg-offset is the part of standard 8250 binding in the kernel.
It is shifting start of address space by reg-offset.
On Xilinx platform this offset is typically 0x1000.
Signed-off-by: Michal Simek <michal.si...@xilinx.com>
---
drivers/serial/ns16550.c | 6 ++++--
include/ns16550.h | 1 +
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 93dad338b375..28da9ddfd859 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -105,7 +105,7 @@ static void ns16550_writeb(NS16550_t port, int offset, int
value)
* As far as we know it doesn't make sense to support selection of
* these options at run-time, so use the existing CONFIG options.
*/
- serial_out_shift(addr, plat->reg_shift, value);
+ serial_out_shift(addr + plat->reg_offset, plat->reg_shift, value);
}
static int ns16550_readb(NS16550_t port, int offset)
@@ -116,7 +116,7 @@ static int ns16550_readb(NS16550_t port, int offset)
offset *= 1 << plat->reg_shift;
addr = map_physmem(plat->base, 0, MAP_NOCACHE) + offset;
- return serial_in_shift(addr, plat->reg_shift);
+ return serial_in_shift(addr + plat->reg_offset, plat->reg_shift);
}
/* We can clean these up once everything is moved to driver model */
@@ -401,6 +401,8 @@ int ns16550_serial_ofdata_to_platdata(struct udevice *dev)
return -EINVAL;
plat->base = addr;
+ plat->reg_offset = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
+ "reg-offset", 0);
plat->reg_shift = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
"reg-shift", 0);
plat->clock = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
diff --git a/include/ns16550.h b/include/ns16550.h
index 4e620676c453..5eeacd6ff945 100644
--- a/include/ns16550.h
+++ b/include/ns16550.h
@@ -54,6 +54,7 @@
*/
struct ns16550_platdata {
unsigned long base;
+ int reg_offset;
int reg_shift;
int clock;
};
--
1.9.1
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