1 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
2 Date: Thu, 21 Jan 2021 10:44:53 +0100
3 Subject: [PATCH] mtd: rawnand: brcmnand: disable WP on BCM4908
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8 BCM4908 contains NAND controller version 0x0701 (v7.1). It means that
9 NAND_WP should be available.
11 For some reason setting #WP on doesn't result in clearing NAND_STATUS_WP
13 [ 1.077857] bcm63138_nand ff801800.nand: timeout on status poll (expected c0000040 got c00000c0)
14 [ 1.086832] bcm63138_nand ff801800.nand: nand #WP expected on
16 For now try working without touching #WP.
18 Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
21 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
22 +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
24 * 1: NAND_WP is set by default, cleared for erase/write operations
25 * 2: NAND_WP is always cleared
27 +#if IS_ENABLED(CONFIG_ARCH_BCM4908)
28 +static int wp_on = 0;
32 module_param(wp_on, int, 0444);
34 /***********************************************************************