From 9e9a615103e5aa209a2dfdf214ad34b187935a99 Mon Sep 17 00:00:00 2001 From: Mike Looijmans Date: Wed, 7 Nov 2018 11:51:48 -0600 Subject: zynq-fpga: Only route PR via PCAP when required 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 Reviewed-by: Moritz Fischer Acked-by: Alan Tull Signed-off-by: Greg Kroah-Hartman --- drivers/fpga/zynq-fpga.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/fpga') diff --git a/drivers/fpga/zynq-fpga.c b/drivers/fpga/zynq-fpga.c index bb82efeebb9d..57b0e6775958 100644 --- a/drivers/fpga/zynq-fpga.c +++ b/drivers/fpga/zynq-fpga.c @@ -501,6 +501,10 @@ static int zynq_fpga_ops_write_complete(struct fpga_manager *mgr, if (err) return err; + /* Release 'PR' control back to the ICAP */ + zynq_fpga_write(priv, CTRL_OFFSET, + zynq_fpga_read(priv, CTRL_OFFSET) & ~CTRL_PCAP_PR_MASK); + err = zynq_fpga_poll_timeout(priv, INT_STS_OFFSET, intr_status, intr_status & IXR_PCFG_DONE_MASK, INIT_POLL_DELAY, -- cgit v1.2.3-55-g7522