Re: [U-Boot] U-boot hangs on imx6 pci driver

Fabio Estevam wrote:

On Wed, May 28, 2014 at 4:40 AM, "David Müller (ELSOFT AG)" d.mueller@elsoft.ch wrote:

...

I use an additional delay in imx6_add_pcie_port() as a workaround so far.

How much of additional delay? Could you please share your patch?

diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index ee08250..1accc0e 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -503,6 +532,9 @@ static int imx6_add_pcie_port(struct pcie_port *pp, pp->root_bus_nr = -1; pp->ops = &imx6_pcie_host_ops;

+ /* FIXME kernel hangs without this delay */ + usleep_range(20000, 25000); + spin_lock_init(&pp->conf_lock); ret = dw_pcie_host_init(pp); if (ret) {

Dave