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Subject[ 111/218] can: janz-ican3: fix support for older hardware revisions
Date
3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Ira W. Snyder" <iws@ovro.caltech.edu>

commit e21093ef6fb4cbecdf926102286dbe280ae965db upstream.

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.

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/net/can/janz-ican3.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

--- a/drivers/net/can/janz-ican3.c
+++ b/drivers/net/can/janz-ican3.c
@@ -1250,7 +1250,6 @@ static irqreturn_t ican3_irq(int irq, vo
*/
static int ican3_reset_module(struct ican3_dev *mod)
{
- u8 val = 1 << mod->num;
unsigned long start;
u8 runold, runnew;

@@ -1264,8 +1263,7 @@ static int ican3_reset_module(struct ica
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;



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