From: John Linn <john.linn@xilinx•com>
To: linuxppc-dev@ozlabs•org, grant.likely@secretlab•ca
Cc: John Linn <john.linn@xilinx•com>
Subject: [PATCH 3/3][POWERPC][V2] Xilinx: boot support for Xilinx uart 16550.
Date: Wed, 2 Apr 2008 09:52:14 -0700 [thread overview]
Message-ID: <20080402165216.C835D1CF8088@mail12-sin.bigfish.com> (raw)
In-Reply-To: <12071551351007-git-send-email-john.linn@xilinx.com>
The Xilinx 16550 uart core is not a standard 16550 because it uses
word-based addressing rather than byte-based adressing. With
additional properties it is compatible with the open firmware
'ns16550' compatible binding.
This code updates the ns16550 driver to use the reg-offset property
so that the Xilinx UART 16550 can be used with it. The reg-shift
was already being handled.
Signed-off-by: John Linn <john.linn@xilinx•com>
---
arch/powerpc/boot/ns16550.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/boot/ns16550.c b/arch/powerpc/boot/ns16550.c
index f8f1b2f..da9d2c2 100644
--- a/arch/powerpc/boot/ns16550.c
+++ b/arch/powerpc/boot/ns16550.c
@@ -56,6 +56,7 @@ int ns16550_console_init(void *devp, struct serial_console_data *scdp)
{
int n;
unsigned long reg_phys;
+ u32 reg_offset;
n = getprop(devp, "virtual-reg", ®_base, sizeof(reg_base));
if (n != sizeof(reg_base)) {
@@ -65,6 +66,10 @@ int ns16550_console_init(void *devp, struct serial_console_data *scdp)
reg_base = (void *)reg_phys;
}
+ n = getprop(devp, "reg-offset", ®_offset, sizeof(reg_offset));
+ if (n == sizeof(reg_offset))
+ reg_base += reg_offset;
+
n = getprop(devp, "reg-shift", ®_shift, sizeof(reg_shift));
if (n != sizeof(reg_shift))
reg_shift = 0;
--
1.5.2.1
next parent reply other threads:[~2008-04-02 16:55 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <12071551351007-git-send-email-john.linn@xilinx.com>
2008-04-02 16:52 ` John Linn [this message]
2008-04-02 17:52 ` [PATCH 3/3][POWERPC][V2] Xilinx: boot support for Xilinx uart 16550 Grant Likely
2008-04-03 0:02 ` David Gibson
2008-04-03 1:16 ` Grant Likely
2008-04-03 13:23 ` Johann Baudy
2008-04-03 13:28 ` John Linn
2008-04-03 14:05 ` Grant Likely
[not found] ` <12071551354058-git-send-email-john.linn@xilinx.com>
2008-04-02 16:52 ` [PATCH 2/3][POWERPC][V2] Xilinx: of_serial " John Linn
2008-04-02 18:00 ` Grant Likely
2008-04-02 18:20 ` John Linn
2008-04-02 19:27 ` Grant Likely
2008-04-02 19:19 ` Sergei Shtylyov
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