* [PATCH 1/2] txx9: Fix spi-baseclk value
@ 2009-09-03 13:59 Atsushi Nemoto
0 siblings, 0 replies; only message in thread
From: Atsushi Nemoto @ 2009-09-03 13:59 UTC (permalink / raw)
To: linux-mips; +Cc: ralf, spi-devel-general, david-b
TXx9 SPI bit rate is calculated by:
fBR = fSPI / 2 / (n + 1)
(fSPI is SPI master clock freq, i.e. imbusclk freq.)
So use imbus_clk / 2 as a spi-baseclk.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
---
arch/mips/txx9/generic/setup.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c
index a205e2b..b2613c1 100644
--- a/arch/mips/txx9/generic/setup.c
+++ b/arch/mips/txx9/generic/setup.c
@@ -85,7 +85,7 @@ int txx9_ccfg_toeon __initdata = 1;
struct clk *clk_get(struct device *dev, const char *id)
{
if (!strcmp(id, "spi-baseclk"))
- return (struct clk *)((unsigned long)txx9_gbus_clock / 2 / 4);
+ return (struct clk *)((unsigned long)txx9_gbus_clock / 2 / 2);
if (!strcmp(id, "imbus_clk"))
return (struct clk *)((unsigned long)txx9_gbus_clock / 2);
return ERR_PTR(-ENOENT);
--
1.5.6.5
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