diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/s3c2410.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c index 04750ee2d0f..e14520091b2 100644 --- a/drivers/mtd/nand/s3c2410.c +++ b/drivers/mtd/nand/s3c2410.c @@ -149,6 +149,10 @@ static int s3c_nand_calc_rate(int wanted, unsigned long clk, int max) { int result; + /* Tacls can be 0ns in some cases */ + if (wanted == 0) + return 0; + result = (wanted * clk) / NS_IN_KHZ; result++; @@ -159,9 +163,6 @@ static int s3c_nand_calc_rate(int wanted, unsigned long clk, int max) return -1; } - if (result < 1) - result = 1; - return result; } @@ -194,7 +195,7 @@ static int s3c2410_nand_setrate(struct s3c2410_nand_info *info) twrph1 = 8; } - if (tacls < 0 || twrph0 < 0 || twrph1 < 0) { + if (tacls < 0 || twrph0 < 1 || twrph1 < 1) { dev_err(info->device, "cannot get suitable timings\n"); return -EINVAL; } @@ -255,11 +256,18 @@ static int s3c2410_nand_inithw(struct s3c2410_nand_info *info) switch (info->cpu_type) { case TYPE_S3C2410: - default: + cfg = S3C2410_NFCONF_EN; + cfg |= S3C2410_NFCONF_TACLS(tacls); + cfg |= S3C2410_NFCONF_TWRPH0(twrph0 - 1); + cfg |= S3C2410_NFCONF_TWRPH1(twrph1 - 1); break; case TYPE_S3C2440: case TYPE_S3C2412: + cfg = S3C2440_NFCONF_TACLS(tacls); + cfg |= S3C2440_NFCONF_TWRPH0(twrph0 - 1); + cfg |= S3C2440_NFCONF_TWRPH1(twrph1 - 1); + /* enable the controller and de-assert nFCE */ writel(S3C2440_NFCONT_ENABLE, info->regs + S3C2440_NFCONT); |