From 2f665945b39a9972260cbcf60d5e7f2a60587f5e Mon Sep 17 00:00:00 2001 From: Rostislav Lisovy Date: Tue, 9 Sep 2014 15:54:30 +0200 Subject: mtd: nand: am335x: Fix 'bit-flip' errors in SPL OMAP GPMC driver used with some NAND Flash devices (e.g. Spansion S34ML08G1) causes that U-boot shows hundreds of 'nand: bit-flip corrected' error messages. Possible cause was discussed in the mailinglist thread: http://lists.denx.de/pipermail/u-boot/2014-April/177508.html The issue was partially fixed with the cc81a5291910d7a.git however this has to be done to fix the SPL. The original author of the code is Belisko Marek Signed-off-by: Rostislav Lisovy diff --git a/drivers/mtd/nand/am335x_spl_bch.c b/drivers/mtd/nand/am335x_spl_bch.c index ce65d8e..bf8b2ee 100644 --- a/drivers/mtd/nand/am335x_spl_bch.c +++ b/drivers/mtd/nand/am335x_spl_bch.c @@ -64,14 +64,18 @@ static int nand_command(int block, int page, uint32_t offs, NAND_CTRL_ALE | NAND_CTRL_CHANGE); /* A[7:0] */ hwctrl(&nand_info[0], (offs >> 8) & 0xff, NAND_CTRL_ALE); /* A[11:9] */ /* Row address */ - hwctrl(&nand_info[0], (page_addr & 0xff), NAND_CTRL_ALE); /* A[19:12] */ - hwctrl(&nand_info[0], ((page_addr >> 8) & 0xff), + if (cmd != NAND_CMD_RNDOUT) { + hwctrl(&nand_info[0], (page_addr & 0xff), + NAND_CTRL_ALE); /* A[19:12] */ + hwctrl(&nand_info[0], ((page_addr >> 8) & 0xff), NAND_CTRL_ALE); /* A[27:20] */ #ifdef CONFIG_SYS_NAND_5_ADDR_CYCLE - /* One more address cycle for devices > 128MiB */ - hwctrl(&nand_info[0], (page_addr >> 16) & 0x0f, + /* One more address cycle for devices > 128MiB */ + hwctrl(&nand_info[0], (page_addr >> 16) & 0x0f, NAND_CTRL_ALE); /* A[31:28] */ #endif + } + hwctrl(&nand_info[0], NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); if (cmd == NAND_CMD_READ0) { -- cgit v0.10.2