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can: janz-ican3: fix support for older hardware revisions 

The Revision 1.0 Janz CMOD-IO Carrier Board does not have support for
the reset registers. To support older hardware, the code is changed to
use the hardware reset register on the Janz VMOD-ICAN3 hardware itself.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
hifive-unleashed-5.1
Ira W. Snyder 2012-09-11 15:58:15 -07:00 committed by Marc Kleine-Budde
parent c0d680e577
commit e21093ef6f
1 changed files with 1 additions and 3 deletions
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4
drivers/net/can/janz-ican3.c
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@ -1391,7 +1391,6 @@ static irqreturn_t ican3_irq(int irq, void *dev_id)
*/
static int ican3_reset_module(struct ican3_dev *mod)
{
u8 val = 1 << mod->num;
unsigned long start;
u8 runold, runnew;
@ -1405,8 +1404,7 @@ static int ican3_reset_module(struct ican3_dev *mod)
runold = ioread8(mod->dpm + TARGET_RUNNING);
/* reset the module */
iowrite8(val, &mod->ctrl->reset_assert);
iowrite8(val, &mod->ctrl->reset_deassert);
iowrite8(0x00, &mod->dpmctrl->hwreset);
/* wait until the module has finished resetting and is running */
start = jiffies;