On 09/19/2017 12:37 PM, Christoph Hellwig wrote: > On Tue, Sep 19, 2017 at 12:11:55PM -0300, Guilherme G. Piccoli wrote: >> src_writel(dev, MUnit.IDR, IOP_SRC_RESET_MASK); >> + >> + msleep(5000); > > src_writel is a writel, and thus a posted MMIO write. You'll need > to have to a read first to make it a reliable timing base. > Just for my full understanding - you're saying a readl BEFORE src_writel() or AFTER src_writel() ? I could add a read to some dummy register, but notice it was a sequence of readl's on aac_is_ctrl_up_and_running() that caused the failure of reset... Thanks