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mtd: nand: denali: set DEVICES_CONNECTED 1 if not set

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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>
This commit is contained in:
Masahiro Yamada 2017-03-23 05:07:22 +09:00 committed by Boris Brezillon
parent e93c1640e0
commit cc5d8031f8
1 changed files with 9 additions and 0 deletions
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9
drivers/mtd/nand/denali.c
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@ -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;