linux-kernel - [PATCH 2/2] can: janz-ican3: fix support for older hardware revisions

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Message-Id: <1347404295-7985-3-git-send-email-iws@ovro.caltech.edu>
Date:	Tue, 11 Sep 2012 15:58:15 -0700
From:	"Ira W. Snyder" <iws@...o.caltech.edu>
To:	linux-kernel@...r.kernel.org
Cc:	linux-can@...r.kernel.org, sameo@...ux.intel.com,
	"Ira W. Snyder" <iws@...o.caltech.edu>
Subject: [PATCH 2/2] can: janz-ican3: fix support for older hardware revisions

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

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@...o.caltech.edu>
---
 drivers/net/can/janz-ican3.c |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)

diff --git a/drivers/net/can/janz-ican3.c b/drivers/net/can/janz-ican3.c
index 98ee438..7edadee 100644
--- a/drivers/net/can/janz-ican3.c
+++ b/drivers/net/can/janz-ican3.c
@@ -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;
-- 
1.7.8.6

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