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 <[email protected]> --- drivers/net/smc911x.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c index 7639a92..3ccb0ef 100644 --- a/drivers/net/smc911x.c +++ b/drivers/net/smc911x.c @@ -420,7 +420,7 @@ static int smc911x_probe(struct device_d *dev) struct eth_device *edev; struct smc911x_priv *priv; uint32_t val; - int is_32bit; + int is_32bit, ret; struct smc911x_plat *pdata = dev->platform_data; priv = xzalloc(sizeof(*priv)); @@ -452,6 +452,16 @@ 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 + */ + ret = wait_on_timeout(100 * MSECOND, smc911x_reg_read(priv, PMT_CTRL) & PMT_CTRL_READY); + if (!ret) { + dev_err(dev, "Device not READY in 100ms aborting\n"); + return -ENODEV; + } + val = smc911x_reg_read(priv, BYTE_TEST); if (val == 0x43218765) { dev_dbg(dev, "BYTE_TEST looks swapped, " -- 1.7.10.4 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
