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@epfl.ch> Tested-by: Andreas Larsson <andreas@gaisler.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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@ -101,8 +101,24 @@ static void sp_populate_of(struct sja1000_priv *priv, struct device_node *of)
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int err;
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u32 prop;
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priv->read_reg = sp_read_reg8;
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priv->write_reg = sp_write_reg8;
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err = of_property_read_u32(of, "reg-io-width", &prop);
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if (err)
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prop = 1; /* 8 bit is default */
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switch (prop) {
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case 4:
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priv->read_reg = sp_read_reg32;
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priv->write_reg = sp_write_reg32;
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break;
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case 2:
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priv->read_reg = sp_read_reg16;
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priv->write_reg = sp_write_reg16;
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break;
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case 1: /* fallthrough */
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default:
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priv->read_reg = sp_read_reg8;
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priv->write_reg = sp_write_reg8;
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}
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err = of_property_read_u32(of, "nxp,external-clock-frequency", &prop);
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if (!err)
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