From bda508f975d1372568a4fc9862be501a6176fd46 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jogo@openwrt.org>
Date: Sat, 12 May 2012 23:04:17 +0200
Subject: [PATCH v2 2/3] MIPS: BCM63XX: export PSI size from nvram

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
---
 arch/mips/bcm63xx/nvram.c                          |   13 +++++++++++++
 arch/mips/include/asm/mach-bcm63xx/bcm63xx_nvram.h |    7 +++++++
 2 files changed, 20 insertions(+)

--- a/arch/mips/bcm63xx/nvram.c
+++ b/arch/mips/bcm63xx/nvram.c
@@ -15,6 +15,7 @@
 #include <linux/export.h>
 #include <linux/kernel.h>
 #include <linux/if_ether.h>
+#include <linux/sizes.h>
 
 #include <bcm63xx_nvram.h>
 
@@ -35,6 +36,8 @@ struct bcm963xx_nvram {
 	u32	checksum_high;
 };
 
+#define BCM63XX_DEFAULT_PSI_SIZE	SZ_64K
+
 static struct bcm963xx_nvram nvram;
 static int mac_addr_used;
 
@@ -104,3 +107,13 @@ int bcm63xx_nvram_get_mac_address(u8 *ma
 	return 0;
 }
 EXPORT_SYMBOL(bcm63xx_nvram_get_mac_address);
+
+unsigned int bcm63xx_nvram_get_psi_size(void)
+{
+	/* max is 64k, but some vendors use higher values */
+	if (nvram.psi_size > 0 && nvram.psi_size <= 512)
+		return nvram.psi_size * SZ_1K;
+
+	return BCM63XX_DEFAULT_PSI_SIZE;
+}
+EXPORT_SYMBOL(bcm63xx_nvram_get_psi_size);
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_nvram.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_nvram.h
@@ -30,4 +30,11 @@ u8 *bcm63xx_nvram_get_name(void);
  */
 int bcm63xx_nvram_get_mac_address(u8 *mac);
 
+/**
+ * bcm63xx_nvram_get_psi_size() - returns the size of the PSI area
+ *
+ * Returns the size of the Persitent Storage Information area in bytes.
+ */
+unsigned int bcm63xx_nvram_get_psi_size(void);
+
 #endif /* BCM63XX_NVRAM_H */