lkml.org 
[lkml]   [2010]   [Dec]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH net-next-2.6 v8 13/20] CAN : Fix bit timing calculation issue
Modify like use calculated value directly passed by CAN core module.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
drivers/net/can/pch_can.c | 6 ++----
1 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c
index 3540978..5a6a0df 100644
--- a/drivers/net/can/pch_can.c
+++ b/drivers/net/can/pch_can.c
@@ -786,17 +786,15 @@ static int pch_set_bittiming(struct net_device *ndev)
const struct can_bittiming *bt = &priv->can.bittiming;
u32 canbit;
u32 bepe;
- u32 brp;

/* Setting the CCE bit for accessing the Can Timing register. */
pch_can_bit_set(&priv->regs->cont, PCH_CTRL_CCE);

- brp = (bt->tq) / (1000000000/PCH_CAN_CLK) - 1;
- canbit = brp & PCH_MSK_BITT_BRP;
+ canbit = (bt->brp - 1) & PCH_MSK_BITT_BRP;
canbit |= (bt->sjw - 1) << PCH_BIT_SJW_SHIFT;
canbit |= (bt->phase_seg1 + bt->prop_seg - 1) << PCH_BIT_TSEG1_SHIFT;
canbit |= (bt->phase_seg2 - 1) << PCH_BIT_TSEG2_SHIFT;
- bepe = (brp & PCH_MSK_BRPE_BRPE) >> PCH_BIT_BRPE_BRPE_SHIFT;
+ bepe = ((bt->brp - 1) & PCH_MSK_BRPE_BRPE) >> PCH_BIT_BRPE_BRPE_SHIFT;
iowrite32(canbit, &priv->regs->bitt);
iowrite32(bepe, &priv->regs->brpe);
pch_can_bit_clear(&priv->regs->cont, PCH_CTRL_CCE);
--
1.6.0.6

\
 
 \ /
  Last update: 2010-12-07 12:09    [W:0.026 / U:0.300 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site