Commit b18ec27c authored by Florian Vaussard's avatar Florian Vaussard Committed by Marc Kleine-Budde

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: default avatarFlorian Vaussard <florian.vaussard@epfl.ch>
Tested-by: default avatarAndreas Larsson <andreas@gaisler.com>
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent 73c90d94
......@@ -101,8 +101,24 @@ 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;
err = of_property_read_u32(of, "reg-io-width", &prop);
if (err)
prop = 1; /* 8 bit is default */
switch (prop) {
case 4:
priv->read_reg = sp_read_reg32;
priv->write_reg = sp_write_reg32;
break;
case 2:
priv->read_reg = sp_read_reg16;
priv->write_reg = sp_write_reg16;
break;
case 1: /* fallthrough */
default:
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)
......
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