openwrt/target/linux/brcm63xx/patches-4.19/355-MIPS-BCM63XX-allow-board-implementations-to-force-fl.patch

From 8a30097a899b975709f728666d5ad20c8b832d21 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jogo@openwrt.org>
Date: Sun, 9 Mar 2014 04:28:14 +0100
Subject: [PATCH 43/44] MIPS: BCM63XX: allow board implementations to force
 flash address

Allow board implementations to force the physmap address.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
---
 arch/mips/bcm63xx/dev-flash.c                         | 19 ++++++++++++++-----
 .../mips/include/asm/mach-bcm63xx/bcm63xx_dev_flash.h |  2 ++
 2 files changed, 16 insertions(+), 5 deletions(-)

--- a/arch/mips/bcm63xx/dev-flash.c
+++ b/arch/mips/bcm63xx/dev-flash.c
@@ -58,6 +58,12 @@ static struct platform_device mtd_dev =
 	},
 };
 
+void __init bcm63xx_flash_force_phys_base_address(u32 start, u32 end)
+{
+	mtd_resources[0].start = start;
+	mtd_resources[0].end = end;
+}
+
 static int __init bcm63xx_detect_flash_type(void)
 {
 	u32 val;
@@ -172,12 +178,15 @@ int __init bcm63xx_flash_register(void)
 
 	switch (flash_type) {
 	case BCM63XX_FLASH_TYPE_PARALLEL:
-		/* read base address of boot chip select (0) */
-		val = bcm_mpi_readl(MPI_CSBASE_REG(0));
-		val &= MPI_CSBASE_BASE_MASK;
 
-		mtd_resources[0].start = val;
-		mtd_resources[0].end = 0x1FFFFFFF;
+		if (!mtd_resources[0].start) {
+			/* read base address of boot chip select (0) */
+			val = bcm_mpi_readl(MPI_CSBASE_REG(0));
+			val &= MPI_CSBASE_BASE_MASK;
+
+			mtd_resources[0].start = val;
+			mtd_resources[0].end = 0x1FFFFFFF;
+		}
 
 		return platform_device_register(&mtd_dev);
 	case BCM63XX_FLASH_TYPE_SERIAL:
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_flash.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_flash.h
@@ -10,6 +10,8 @@ enum {
 
 void bcm63xx_flash_detect(void);
 
+void bcm63xx_flash_force_phys_base_address(u32 start, u32 end);
+
 int __init bcm63xx_flash_register(void);
 
 #endif /* __BCM63XX_FLASH_H */