Subject: [PATCH] mtd: rawnand: brcmnand: disable WP on BCM4908
From: Rafał Miłecki <[email-masked]>
Date: Thu, 21 Jan 2021 10:44:53 +0100

BCM4908 contains NAND controller version 0x0701 (v7.1). It means that
NAND_WP should be available.

For some reason setting #WP on doesn't result in clearing NAND_STATUS_WP
status bit:
[    1.077857] bcm63138_nand ff801800.nand: timeout on status poll (expected c0000040 got c00000c0)
[    1.086832] bcm63138_nand ff801800.nand: nand #WP expected on

For now try working without touching #WP.

Signed-off-by: Rafał Miłecki <[email-masked]>
---

--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
@@ -38,7 +38,11 @@
  * 1: NAND_WP is set by default, cleared for erase/write operations
  * 2: NAND_WP is always cleared
  */
+#if IS_ENABLED(CONFIG_ARCH_BCM4908)
+static int wp_on = 0;
+#else
 static int wp_on = 1;
+#endif
 module_param(wp_on, int, 0444);
 
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