poll the READY bit in PMT_CTRL. Any other access to the device is
forbidden while this bit isn't set. Try for 100ms
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>
---
drivers/net/smc911x.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
index cfcd83f..3695d32 100644
--- a/drivers/net/smc911x.c
+++ b/drivers/net/smc911x.c
@@ -422,6 +422,7 @@ static int smc911x_probe(struct device_d *dev)
uint32_t val;
int is_32bit;
struct smc911x_plat *pdata = dev->platform_data;
+ unsigned int to = 100;
priv = xzalloc(sizeof(*priv));
is_32bit = dev->resource[0].flags & IORESOURCE_MEM_TYPE_MASK;
@@ -452,6 +453,17 @@ static int smc911x_probe(struct device_d *dev)
}
}
+ /*
+ * poll the READY bit in PMT_CTRL. Any other access to the device is
+ * forbidden while this bit isn't set. Try for 100ms
+ */
+ while (!(smc911x_reg_read(priv, PMT_CTRL) & PMT_CTRL_READY) && --to)
+ udelay(1000);
+ if (to == 0) {
+ dev_err(dev, "Device not READY in 100ms aborting\n");
+ return -ENODEV;
+ }
+
val = smc911x_reg_read(priv, BYTE_TEST);
if (val == 0x43218765) {
dev_info(dev, "BYTE_TEST looks swapped, "
--
1.7.10.4
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