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authorKevin Wells <wellsk40@gmail.com>2010-03-16 15:55:36 -0700
committerBen Dooks <ben-linux@fluff.org>2010-04-20 01:16:57 +0100
commitbe80dbaa3ed64337693be58fb2f3808e78911ba6 (patch)
tree0fd671b707e584ac7cedf4166063b7185d620fa4 /drivers/i2c
parent7c6bd2010fced38444c9fd658f4c6ce61bd185bf (diff)
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i2c-pnx: Limit maximum divider to 1023
Limit maximum divider to 0x3ff to divider computations. On high I2C parent clock rates, the divider can exceed 0x3ff. This will help prevent some very odd clock rates. Signed-off-by: Kevin Wells <wellsk40@gmail.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-pnx.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-pnx.c b/drivers/i2c/busses/i2c-pnx.c
index 247103372a06..68fa415d9ad5 100644
--- a/drivers/i2c/busses/i2c-pnx.c
+++ b/drivers/i2c/busses/i2c-pnx.c
@@ -633,6 +633,8 @@ static int __devinit i2c_pnx_probe(struct platform_device *pdev)
*/
tmp = ((freq / 1000) / I2C_PNX_SPEED_KHZ) / 2 - 2;
+ if (tmp > 0x3FF)
+ tmp = 0x3FF;
iowrite32(tmp, I2C_REG_CKH(alg_data));
iowrite32(tmp, I2C_REG_CKL(alg_data));