linux-kernel - [PATCH v2 6/6] can: sja1000: of: add reg-io-width property for 8, 16 and 32-bit register access

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Message-Id: <1391164513-11529-7-git-send-email-florian.vaussard@epfl.ch>
Date:	Fri, 31 Jan 2014 11:35:13 +0100
From:	Florian Vaussard <florian.vaussard@...l.ch>
To:	Wolfgang Grandegger <wg@...ndegger.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Cc:	linux-can@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, florian.vaussard@...l.ch
Subject: [PATCH v2 6/6] can: sja1000: of: add reg-io-width property for 8, 16 and 32-bit register access

Add the 'reg-io-width' property for 8, 16 and 32-bit access, like
what is currently done with IORESOURCE_MEM_{8,16,32}BIT for non-OF
boot.

Signed-off-by: Florian Vaussard <florian.vaussard@...l.ch>
---
 drivers/net/can/sja1000/sja1000_platform.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/sja1000/sja1000_platform.c b/drivers/net/can/sja1000/sja1000_platform.c
index 96a92a1..62ebc3d 100644
--- a/drivers/net/can/sja1000/sja1000_platform.c
+++ b/drivers/net/can/sja1000/sja1000_platform.c
@@ -103,8 +103,17 @@ static void sp_populate_of(struct sja1000_priv *priv, struct device_node *of)
 	int err;
 	u32 prop;
 
-	priv->read_reg = sp_read_reg8;
-	priv->write_reg = sp_write_reg8;
+	of_property_read_u32(of, "reg-io-width", &prop);
+	if (prop == 4) {
+		priv->read_reg = sp_read_reg32;
+		priv->write_reg = sp_write_reg32;
+	} else if (prop == 2) {
+		priv->read_reg = sp_read_reg16;
+		priv->write_reg = sp_write_reg16;
+	} else {
+		priv->read_reg = sp_read_reg8;
+		priv->write_reg = sp_write_reg8;
+	}
 
 	err = of_property_read_u32(of, "nxp,external-clock-frequency", &prop);
 	if (!err)
-- 
1.8.1.2

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