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FPGA: Cyclon II: Correctly reset the FPGA before configuration
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 <stephan.gatzka@hbm.com> Signed-off-by: Stefan Roese <sr@denx.de>
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@ -144,6 +144,8 @@ static int CYC2_ps_load(Altera_desc *desc, const void *buf, size_t bsize)
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}
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/* Establish the initial state */
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(*fn->config) (FALSE, TRUE, cookie); /* De-assert nCONFIG */
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udelay(100);
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(*fn->config) (TRUE, TRUE, cookie); /* Assert nCONFIG */
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udelay(2); /* T_cfg > 2us */
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