diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-03-22 21:07:22 +0100 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-03-28 14:19:45 +0200 |
| commit | cc5d8031f8c7b11c325a37118f9aa6133f0b28a0 (patch) | |
| tree | 7490ce79c2d8410002f7226df717c52ca6c9fb91 /drivers | |
| parent | mtd: nand: denali: simplify multi device fixup code (diff) | |
| download | linux-cc5d8031f8c7b11c325a37118f9aa6133f0b28a0.tar.xz linux-cc5d8031f8c7b11c325a37118f9aa6133f0b28a0.zip | |
mtd: nand: denali: set DEVICES_CONNECTED 1 if not set
Currently, the driver expects DEVICE_CONNECTED is automatically set
by the hardware, but this feature is disabled in some cases.
In such cases, it is the software's responsibility to set up the
DEVICES_CONNECTED register.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/denali.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c index e1c45bf2656d..b442a3ed9f0f 100644 --- a/drivers/mtd/nand/denali.c +++ b/drivers/mtd/nand/denali.c @@ -1417,6 +1417,15 @@ static int denali_multidev_fixup(struct denali_nand_info *denali) */ denali->devnum = ioread32(denali->flash_reg + DEVICES_CONNECTED); + /* + * On some SoCs, DEVICES_CONNECTED is not auto-detected. + * For those, DEVICES_CONNECTED is left to 0. Set 1 if it is the case. + */ + if (denali->devnum == 0) { + denali->devnum = 1; + iowrite32(1, denali->flash_reg + DEVICES_CONNECTED); + } + if (denali->devnum == 1) return 0; |