| From | Masahiro Yamada <> | Subject | [PATCH 30/39] mtd: nand: denali: set DEVICES_CONNECTED 1 if not set | Date | Sun, 27 Nov 2016 03:06:16 +0900 |
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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> ---
drivers/mtd/nand/denali.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c index 71bdf2a..4b2bbcb 100644 --- a/drivers/mtd/nand/denali.c +++ b/drivers/mtd/nand/denali.c @@ -1485,6 +1485,13 @@ static void 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 SoCs + * DEVICES_CONNECT is left to 0. Set 1 if it is the case. + */ + if (denali->devnum == 0) + denali->devnum = 1; + devnum_shift = fls(denali->devnum) - 1; if (denali->devnum != BIT(devnum_shift)) { @@ -1492,9 +1499,10 @@ static void denali_multidev_fixup(struct denali_nand_info *denali) "DEVICE_CONNECTED=%d is not power of 2. Some devices will not be used.\n", denali->devnum); denali->devnum = BIT(devnum_shift); - iowrite32(denali->devnum, denali->flash_reg + DEVICES_CONNECTED); } + iowrite32(denali->devnum, denali->flash_reg + DEVICES_CONNECTED); + mtd->size <<= devnum_shift; mtd->erasesize <<= devnum_shift; mtd->writesize <<= devnum_shift; -- 2.7.4
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