From cc5d8031f8c7b11c325a37118f9aa6133f0b28a0 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Thu, 23 Mar 2017 05:07:22 +0900 Subject: [PATCH] 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 Signed-off-by: Boris Brezillon --- drivers/mtd/nand/denali.c | 9 +++++++++ 1 file changed, 9 insertions(+) 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; -- 2.11.0