Kamal Dasu 9d2ee0a60b mtd: nand: brcmnand: Check flash #WP pin status before nand erase/program
On brcmnand controller v6.x and v7.x, the #WP pin is controlled through
the NAND_WP bit in CS_SELECT register.

The driver currently assumes that toggling the #WP pin is
instantaneously enabling/disabling write-protection, but it actually
takes some time to propagate the new state to the internal NAND chip
logic. This behavior is sometime causing data corruptions when an
erase/program operation is executed before write-protection has really
been disabled.

Fixes: 27c5b17cd1b1 ("mtd: nand: add NAND driver "library" for Broadcom STB NAND controller")
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-25 14:18:42 +02:00
..
2017-03-03 21:36:56 -08:00
2017-03-03 21:36:56 -08:00
2017-02-23 15:57:04 -08:00
2017-03-03 16:15:48 -08:00
2017-03-04 11:26:18 -08:00
2017-02-20 16:42:43 -08:00
2017-02-21 11:51:42 -08:00
2017-02-22 19:23:14 -08:00
2017-03-03 16:44:21 -08:00
2017-02-23 11:53:22 -08:00
2017-03-01 09:46:02 -08:00
2017-02-20 17:23:57 -08:00
2017-02-23 15:57:04 -08:00
2017-03-02 13:53:13 -08:00
2017-03-03 21:36:56 -08:00
2017-02-23 11:53:22 -08:00