Hi Richard, On Tue, Sep 23, 2014 at 1:11 AM, Richard Zhu <r65037@xxxxxxxxxxxxx> wrote: > - a while delay is mandatory required after pcie_ref_clk_en > is set. Otherwise, the system would be hang on imx6qdl ard > boards, because that imx6qdl boards don't have the reset_gpio. > - the clocks should be stable already after the > "clk_prepare_enable" is return. So I think it's ok to move the > usleep delay after the pcie_ref_en is set. > > Signed-off-by: Richard Zhu <r65037@xxxxxxxxxxxxx> Tested-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx> Without this patch we notice that the kernel does not boot anymore since commit 3fce0e882f61 (PCI: imx6: Delay enabling reference clock for SS until it stabilizes) on a system that does not pass the PCI gpio reset in the dtb. This causes a regression on mx6 nitrogen boards. I would suggest that you resend this patch only so that it could be applied into 3.18 as a bug fix. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
