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Subject[ 17/66] can: c_can: Set reserved bit in IFx_MASK2 to 1 on write
3.2-stable review patch.  If anyone has any objections, please let me know.

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

From: Alexander Stein <alexander.stein@systec-electronic.com>

commit 2bd3bc4e8472424f1a6009825397639a8968920a upstream.

According to C_CAN documentation, the reserved bit in IFx_MASK2 register is
fixed 1.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/net/can/c_can/c_can.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/net/can/c_can/c_can.c
+++ b/drivers/net/can/c_can/c_can.c
@@ -446,8 +446,12 @@ static void c_can_setup_receive_object(s

priv->write_reg(priv, &priv->regs->ifregs[iface].mask1,
IFX_WRITE_LOW_16BIT(mask));
+
+ /* According to C_CAN documentation, the reserved bit
+ * in IFx_MASK2 register is fixed 1
+ */
priv->write_reg(priv, &priv->regs->ifregs[iface].mask2,
- IFX_WRITE_HIGH_16BIT(mask));
+ IFX_WRITE_HIGH_16BIT(mask) | BIT(13));

priv->write_reg(priv, &priv->regs->ifregs[iface].arb1,
IFX_WRITE_LOW_16BIT(id));



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