[PATCH v2 23/53] mtd: nand: denali: set DEVICES_CONNECTED 1 if not set

Masahiro Yamada
2017-03-22T14:09:50Z

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>
---

Changes in v2: None

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 abf8997..3da0a0e 100644
--- a/drivers/mtd/nand/denali.c
+++ b/drivers/mtd/nand/denali.c
@@ -1472,6 +1472,15 @@ 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;

--
2.7.4