From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Roese Date: Tue, 23 Oct 2012 11:11:41 +0200 Subject: [U-Boot] [PATCH] FPGA: Cyclon II: Correctly reset the FPGA before configuration Message-ID: <1350983501-30673-1-git-send-email-sr@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de From: Stephan Gatzka Deassert the CONFIG pin before asserting it again. This assures that the FPGA will be resetted and therefore configuration will be correctly enabled. This is also already done on other FPGA's, e.g. Stratix. Signed-off-by: Stephan Gatzka Signed-off-by: Stefan Roese --- drivers/fpga/cyclon2.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/fpga/cyclon2.c b/drivers/fpga/cyclon2.c index 26494a3..0773e73 100644 --- a/drivers/fpga/cyclon2.c +++ b/drivers/fpga/cyclon2.c @@ -144,6 +144,8 @@ static int CYC2_ps_load(Altera_desc *desc, const void *buf, size_t bsize) } /* Establish the initial state */ + (*fn->config) (FALSE, TRUE, cookie); /* De-assert nCONFIG */ + udelay(100); (*fn->config) (TRUE, TRUE, cookie); /* Assert nCONFIG */ udelay(2); /* T_cfg > 2us */ -- 1.8.0