Use unique PSCx register base offset to obtain the
SPI PSC number used for SPI bus id.
Signed-off-by: Anatolij Gustschin <ag...@denx.de>
---
drivers/spi/spi-mpc512x-psc.c | 17 +++++++++++------
1 files changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/spi/spi-mpc512x-psc.c b/drivers/spi/spi-mpc512x-psc.c
index 0a1e39e..844d68f 100644
--- a/drivers/spi/spi-mpc512x-psc.c
+++ b/drivers/spi/spi-mpc512x-psc.c
@@ -523,16 +523,21 @@ static int __devinit mpc512x_psc_spi_of_probe(struct
platform_device *op)
/* get PSC id (0..11, used by port_config) */
if (op->dev.platform_data == NULL) {
- const u32 *psc_nump;
+ u32 reg;
+ int err;
- psc_nump = of_get_property(op->dev.of_node, "cell-index", NULL);
- if (!psc_nump || *psc_nump > 11) {
- dev_err(&op->dev, "mpc512x_psc_spi: Device node %s "
- "has invalid cell-index property\n",
+ err = of_property_read_u32(op->dev.of_node, "reg", ®);
+ if (err) {
+ dev_err(&op->dev, "Can't read reg property: %d\n", err);
+ return err;
+ }
+
+ id = (reg & 0xf00) >> 8;
+ if (id > 11) {
+ dev_err(&op->dev, "node %s has invalid reg property\n",
op->dev.of_node->full_name);
return -EINVAL;
}
- id = *psc_nump;
}
return mpc512x_psc_spi_do_probe(&op->dev, (u32) regaddr64, (u32) size64,
--
1.7.7.6
------------------------------------------------------------------------------
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