Hi Mike, seems like a good usecase (though uncommon), question below
On Tue, Oct 23, 2018 at 08:31:19AM +0200, Mike Looijmans wrote: > The Xilinx Zynq FPGA driver takes ownership of the PR interface, making > it impossible to use the ICAP interface for partial reconfiguration. > > This patch changes the driver to only activate PR over PCAP while the > device is actively being accessed by the driver for programming. > > This allows both PCAP and ICAP interfaces to be used for PR. > > Signed-off-by: Mike Looijmans <mike.looijm...@topic.nl> > --- > drivers/fpga/zynq-fpga.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/fpga/zynq-fpga.c b/drivers/fpga/zynq-fpga.c > index 3110e00..f6c205a 100644 > --- a/drivers/fpga/zynq-fpga.c > +++ b/drivers/fpga/zynq-fpga.c > @@ -497,6 +497,10 @@ static int zynq_fpga_ops_write_complete(struct > fpga_manager *mgr, > int err; > u32 intr_status; > > + /* Release 'PR' control back to the ICAP */ > + zynq_fpga_write(priv, CTRL_OFFSET, > + zynq_fpga_read(priv, CTRL_OFFSET) & ~CTRL_PCAP_PR_MASK); > + Shouldn't that be after the below stanza that enables the clock? > err = clk_enable(priv->clk); > if (err) > return err; > -- > 1.9.1 > Cheers, Moritz
