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.simek@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; };