[brcm47xx]: Fix reading sprom from nvram without a prefix

The bcma based SoCs with a ieee80211 core on the SoC and an other
connected via PCIe or USB store the sprom for the SoC with a sb/1/
prefix. The SoC with just one wifi core do not use prefixes. The
BCM4706 do not use a prefix for the SoC part at all, because the prefix
is the path to the ieee80211 core and there is non on the BCM4706.


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33597 3c298f89-4303-0410-b956-a3cf2f4a3e73

5 files changed, 1189 insertions, 2 deletions

diff --git a/target/linux/brcm47xx/patches-3.3/193-MIPS-BCM47xx-read-out-full-board-data.patch b/target/linux/brcm47xx/patches-3.3/193-MIPS-BCM47xx-read-out-full-board-data.patch
new file mode 100644
index 0000000000..bdfc348cc7
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.3/193-MIPS-BCM47xx-read-out-full-board-data.patch
@@ -0,0 +1,81 @@
+--- a/arch/mips/bcm47xx/sprom.c
++++ b/arch/mips/bcm47xx/sprom.c
+@@ -164,10 +164,6 @@ static void nvram_read_alpha2(const char
+ static void bcm47xx_fill_sprom_r1234589(struct ssb_sprom *sprom,
+ 					const char *prefix)
+ {
+-	nvram_read_u16(prefix, NULL, "boardrev", &sprom->board_rev, 0);
+-	if (!sprom->board_rev)
+-		nvram_read_u16(NULL, NULL, "boardrev", &sprom->board_rev, 0);
+-	nvram_read_u16(prefix, NULL, "boardnum", &sprom->board_num, 0);
+ 	nvram_read_u8(prefix, NULL, "ledbh0", &sprom->gpio0, 0xff);
+ 	nvram_read_u8(prefix, NULL, "ledbh1", &sprom->gpio1, 0xff);
+ 	nvram_read_u8(prefix, NULL, "ledbh2", &sprom->gpio2, 0xff);
+@@ -214,13 +210,6 @@ static void bcm47xx_fill_sprom_r2389(str
+ 	nvram_read_u8(prefix, NULL, "pa1himaxpwr", &sprom->maxpwr_ah, 0);
+ }
+ 
+-static void bcm47xx_fill_sprom_r2(struct ssb_sprom *sprom, const char *prefix)
+-{
+-	nvram_read_u32_2(prefix, "boardflags", &sprom->boardflags_lo,
+-			 &sprom->boardflags_hi);
+-	nvram_read_u16(prefix, NULL, "boardtype", &sprom->board_type, 0);
+-}
+-
+ static void bcm47xx_fill_sprom_r389(struct ssb_sprom *sprom, const char *prefix)
+ {
+ 	nvram_read_u8(prefix, NULL, "bxa2g", &sprom->bxa2g, 0);
+@@ -241,9 +230,6 @@ static void bcm47xx_fill_sprom_r389(stru
+ 
+ static void bcm47xx_fill_sprom_r3(struct ssb_sprom *sprom, const char *prefix)
+ {
+-	nvram_read_u32_2(prefix, "boardflags", &sprom->boardflags_lo,
+-			 &sprom->boardflags_hi);
+-	nvram_read_u16(prefix, NULL, "boardtype", &sprom->board_type, 0);
+ 	nvram_read_u8(prefix, NULL, "regrev", &sprom->regrev, 0);
+ 	nvram_read_leddc(prefix, "leddc", &sprom->leddc_on_time,
+ 			 &sprom->leddc_off_time);
+@@ -252,11 +238,6 @@ static void bcm47xx_fill_sprom_r3(struct
+ static void bcm47xx_fill_sprom_r4589(struct ssb_sprom *sprom,
+ 				     const char *prefix)
+ {
+-	nvram_read_u32_2(prefix, "boardflags", &sprom->boardflags_lo,
+-			 &sprom->boardflags_hi);
+-	nvram_read_u32_2(prefix, "boardflags2", &sprom->boardflags2_lo,
+-			 &sprom->boardflags2_hi);
+-	nvram_read_u16(prefix, NULL, "boardtype", &sprom->board_type, 0);
+ 	nvram_read_u8(prefix, NULL, "regrev", &sprom->regrev, 0);
+ 	nvram_read_s8(prefix, NULL, "ag2", &sprom->antenna_gain.a2, 0);
+ 	nvram_read_s8(prefix, NULL, "ag3", &sprom->antenna_gain.a3, 0);
+@@ -555,9 +536,23 @@ void bcm47xx_fill_sprom_ethernet(struct
+ 	nvram_read_macaddr(prefix, "il0macaddr", &sprom->il0mac);
+ }
+ 
++static void bcm47xx_fill_board_data(struct ssb_sprom *sprom, const char *prefix)
++{
++	nvram_read_u16(prefix, NULL, "boardrev", &sprom->board_rev, 0);
++	if (!sprom->board_rev)
++		nvram_read_u16(NULL, NULL, "boardrev", &sprom->board_rev, 0);
++	nvram_read_u16(prefix, NULL, "boardnum", &sprom->board_num, 0);
++	nvram_read_u16(prefix, NULL, "boardtype", &sprom->board_type, 0);
++	nvram_read_u32_2(prefix, "boardflags", &sprom->boardflags_lo,
++			 &sprom->boardflags_hi);
++	nvram_read_u32_2(prefix, "boardflags2", &sprom->boardflags2_lo,
++			 &sprom->boardflags2_hi);
++}
++
+ void bcm47xx_fill_sprom(struct ssb_sprom *sprom, const char *prefix)
+ {
+ 	bcm47xx_fill_sprom_ethernet(sprom, prefix);
++	bcm47xx_fill_board_data(sprom, prefix);
+ 
+ 	nvram_read_u8(prefix, NULL, "sromrev", &sprom->revision, 0);
+ 
+@@ -571,7 +566,6 @@ void bcm47xx_fill_sprom(struct ssb_sprom
+ 		bcm47xx_fill_sprom_r1234589(sprom, prefix);
+ 		bcm47xx_fill_sprom_r12389(sprom, prefix);
+ 		bcm47xx_fill_sprom_r2389(sprom, prefix);
+-		bcm47xx_fill_sprom_r2(sprom, prefix);
+ 		break;
+ 	case 3:
+ 		bcm47xx_fill_sprom_r1234589(sprom, prefix);
diff --git a/target/linux/brcm47xx/patches-3.3/194-MIPS-BCM47XX-read-sprom-without-prefix-if-no-ieee802.patch b/target/linux/brcm47xx/patches-3.3/194-MIPS-BCM47XX-read-sprom-without-prefix-if-no-ieee802.patch
new file mode 100644
index 0000000000..69d034ccaf
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.3/194-MIPS-BCM47XX-read-sprom-without-prefix-if-no-ieee802.patch
@@ -0,0 +1,11 @@
+--- a/arch/mips/bcm47xx/setup.c
++++ b/arch/mips/bcm47xx/setup.c
+@@ -258,6 +258,8 @@ static int bcm47xx_get_sprom_bcma(struct
+ 			snprintf(prefix, sizeof(prefix), "sb/%u/",
+ 				 core->core_index);
+ 			bcm47xx_fill_sprom(out, prefix);
++		} else {
++			bcm47xx_fill_sprom(out, NULL);
+ 		}
+ 		return 0;
+ 	default:
diff --git a/target/linux/brcm47xx/patches-3.3/195-MIPS-BCM47xx-sprom-read-values-without-prefix-as-fal.patch b/target/linux/brcm47xx/patches-3.3/195-MIPS-BCM47xx-sprom-read-values-without-prefix-as-fal.patch
new file mode 100644
index 0000000000..c486e68c00
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.3/195-MIPS-BCM47xx-sprom-read-values-without-prefix-as-fal.patch
@@ -0,0 +1,1095 @@
+--- a/arch/mips/bcm47xx/setup.c
++++ b/arch/mips/bcm47xx/setup.c
+@@ -127,7 +127,7 @@ static int bcm47xx_get_sprom_ssb(struct
+ 		snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
+ 			 bus->host_pci->bus->number + 1,
+ 			 PCI_SLOT(bus->host_pci->devfn));
+-		bcm47xx_fill_sprom(out, prefix);
++		bcm47xx_fill_sprom(out, prefix, false);
+ 		return 0;
+ 	} else {
+ 		printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n");
+@@ -146,7 +146,7 @@ static int bcm47xx_get_invariants(struct
+ 	bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
+ 
+ 	memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
+-	bcm47xx_fill_sprom(&iv->sprom, NULL);
++	bcm47xx_fill_sprom(&iv->sprom, NULL, false);
+ 
+ 	if (nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
+ 		iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
+@@ -248,18 +248,17 @@ static int bcm47xx_get_sprom_bcma(struct
+ 		snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
+ 			 bus->host_pci->bus->number + 1,
+ 			 PCI_SLOT(bus->host_pci->devfn));
+-		bcm47xx_fill_sprom(out, prefix);
++		bcm47xx_fill_sprom(out, prefix, false);
+ 		return 0;
+ 	case BCMA_HOSTTYPE_SOC:
+ 		memset(out, 0, sizeof(struct ssb_sprom));
+-		bcm47xx_fill_sprom_ethernet(out, NULL);
+ 		core = bcma_find_core(bus, BCMA_CORE_80211);
+ 		if (core) {
+ 			snprintf(prefix, sizeof(prefix), "sb/%u/",
+ 				 core->core_index);
+-			bcm47xx_fill_sprom(out, prefix);
++			bcm47xx_fill_sprom(out, prefix, true);
+ 		} else {
+-			bcm47xx_fill_sprom(out, NULL);
++			bcm47xx_fill_sprom(out, NULL, false);
+ 		}
+ 		return 0;
+ 	default:
+--- a/arch/mips/bcm47xx/sprom.c
++++ b/arch/mips/bcm47xx/sprom.c
+@@ -42,25 +42,39 @@ static void create_key(const char *prefi
+ 		snprintf(buf, len, "%s", name);
+ }
+ 
++static int get_nvram_var(const char *prefix, const char *postfix,
++			 const char *name, char *buf, int len, bool fallback)
++{
++	char key[40];
++	int err;
++
++	create_key(prefix, postfix, name, key, sizeof(key));
++
++	err = nvram_getenv(key, buf, len);
++	if (fallback && err == NVRAM_ERR_ENVNOTFOUND && prefix) {
++		create_key(NULL, postfix, name, key, sizeof(key));
++		err = nvram_getenv(key, buf, len);
++	}
++	return err;
++}
++
+ #define NVRAM_READ_VAL(type)						\
+ static void nvram_read_ ## type (const char *prefix,			\
+ 				 const char *postfix, const char *name,	\
+-				 type *val, type allset)		\
++				 type *val, type allset, bool fallback)	\
+ {									\
+ 	char buf[100];							\
+-	char key[40];							\
+ 	int err;							\
+ 	type var;							\
+ 									\
+-	create_key(prefix, postfix, name, key, sizeof(key));		\
+-									\
+-	err = nvram_getenv(key, buf, sizeof(buf));			\
++	err = get_nvram_var(prefix, postfix, name, buf, sizeof(buf),	\
++			    fallback);					\
+ 	if (err < 0)							\
+ 		return;							\
+ 	err = kstrto ## type (buf, 0, &var);				\
+ 	if (err) {							\
+-		pr_warn("can not parse nvram name %s with value %s"	\
+-			" got %i", key, buf, err);			\
++		pr_warn("can not parse nvram name %s%s%s with value %s got %i\n",	\
++			prefix, name, postfix, buf, err);		\
+ 		return;							\
+ 	}								\
+ 	if (allset && var == allset)					\
+@@ -76,22 +90,19 @@ NVRAM_READ_VAL(u32)
+ #undef NVRAM_READ_VAL
+ 
+ static void nvram_read_u32_2(const char *prefix, const char *name,
+-			     u16 *val_lo, u16 *val_hi)
++			     u16 *val_lo, u16 *val_hi, bool fallback)
+ {
+ 	char buf[100];
+-	char key[40];
+ 	int err;
+ 	u32 val;
+ 
+-	create_key(prefix, NULL, name, key, sizeof(key));
+-
+-	err = nvram_getenv(key, buf, sizeof(buf));
++	err = get_nvram_var(prefix, NULL, name, buf, sizeof(buf), fallback);
+ 	if (err < 0)
+ 		return;
+ 	err = kstrtou32(buf, 0, &val);
+ 	if (err) {
+-		pr_warn("can not parse nvram name %s with value %s got %i",
+-			key, buf, err);
++		pr_warn("can not parse nvram name %s%s with value %s got %i\n",
++			prefix, name, buf, err);
+ 		return;
+ 	}
+ 	*val_lo = (val & 0x0000FFFFU);
+@@ -99,22 +110,20 @@ static void nvram_read_u32_2(const char
+ }
+ 
+ static void nvram_read_leddc(const char *prefix, const char *name,
+-			     u8 *leddc_on_time, u8 *leddc_off_time)
++			     u8 *leddc_on_time, u8 *leddc_off_time,
++			     bool fallback)
+ {
+ 	char buf[100];
+-	char key[40];
+ 	int err;
+ 	u32 val;
+ 
+-	create_key(prefix, NULL, name, key, sizeof(key));
+-
+-	err = nvram_getenv(key, buf, sizeof(buf));
++	err = get_nvram_var(prefix, NULL, name, buf, sizeof(buf), fallback);
+ 	if (err < 0)
+ 		return;
+ 	err = kstrtou32(buf, 0, &val);
+ 	if (err) {
+-		pr_warn("can not parse nvram name %s with value %s got %i",
+-			key, buf, err);
++		pr_warn("can not parse nvram name %s%s with value %s got %i\n",
++			prefix, name, buf, err);
+ 		return;
+ 	}
+ 
+@@ -126,336 +135,435 @@ static void nvram_read_leddc(const char
+ }
+ 
+ static void nvram_read_macaddr(const char *prefix, const char *name,
+-			       u8 (*val)[6])
++			       u8 (*val)[6], bool fallback)
+ {
+ 	char buf[100];
+-	char key[40];
+ 	int err;
+ 
+-	create_key(prefix, NULL, name, key, sizeof(key));
+-
+-	err = nvram_getenv(key, buf, sizeof(buf));
++	err = get_nvram_var(prefix, NULL, name, buf, sizeof(buf), fallback);
+ 	if (err < 0)
+ 		return;
++
+ 	nvram_parse_macaddr(buf, *val);
+ }
+ 
+ static void nvram_read_alpha2(const char *prefix, const char *name,
+-			     char (*val)[2])
++			     char (*val)[2], bool fallback)
+ {
+ 	char buf[10];
+-	char key[40];
+ 	int err;
+ 
+-	create_key(prefix, NULL, name, key, sizeof(key));
+-
+-	err = nvram_getenv(key, buf, sizeof(buf));
++	err = get_nvram_var(prefix, NULL, name, buf, sizeof(buf), fallback);
+ 	if (err < 0)
+ 		return;
+ 	if (buf[0] == '0')
+ 		return;
+ 	if (strlen(buf) > 2) {
+-		pr_warn("alpha2 is too long %s", buf);
++		pr_warn("alpha2 is too long %s\n", buf);
+ 		return;
+ 	}
+ 	memcpy(val, buf, sizeof(val));
+ }
+ 
+ static void bcm47xx_fill_sprom_r1234589(struct ssb_sprom *sprom,
+-					const char *prefix)
++					const char *prefix, bool fallback)
+ {
+-	nvram_read_u8(prefix, NULL, "ledbh0", &sprom->gpio0, 0xff);
+-	nvram_read_u8(prefix, NULL, "ledbh1", &sprom->gpio1, 0xff);
+-	nvram_read_u8(prefix, NULL, "ledbh2", &sprom->gpio2, 0xff);
+-	nvram_read_u8(prefix, NULL, "ledbh3", &sprom->gpio3, 0xff);
+-	nvram_read_u8(prefix, NULL, "aa2g", &sprom->ant_available_bg, 0);
+-	nvram_read_u8(prefix, NULL, "aa5g", &sprom->ant_available_a, 0);
+-	nvram_read_s8(prefix, NULL, "ag0", &sprom->antenna_gain.a0, 0);
+-	nvram_read_s8(prefix, NULL, "ag1", &sprom->antenna_gain.a1, 0);
+-	nvram_read_alpha2(prefix, "ccode", &sprom->alpha2);
++	nvram_read_u8(prefix, NULL, "ledbh0", &sprom->gpio0, 0xff, fallback);
++	nvram_read_u8(prefix, NULL, "ledbh1", &sprom->gpio1, 0xff, fallback);
++	nvram_read_u8(prefix, NULL, "ledbh2", &sprom->gpio2, 0xff, fallback);
++	nvram_read_u8(prefix, NULL, "ledbh3", &sprom->gpio3, 0xff, fallback);
++	nvram_read_u8(prefix, NULL, "aa2g", &sprom->ant_available_bg, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "aa5g", &sprom->ant_available_a, 0,
++		      fallback);
++	nvram_read_s8(prefix, NULL, "ag0", &sprom->antenna_gain.a0, 0,
++		      fallback);
++	nvram_read_s8(prefix, NULL, "ag1", &sprom->antenna_gain.a1, 0,
++		      fallback);
++	nvram_read_alpha2(prefix, "ccode", &sprom->alpha2, fallback);
+ }
+ 
+ static void bcm47xx_fill_sprom_r12389(struct ssb_sprom *sprom,
+-				      const char *prefix)
++				      const char *prefix, bool fallback)
+ {
+-	nvram_read_u16(prefix, NULL, "pa0b0", &sprom->pa0b0, 0);
+-	nvram_read_u16(prefix, NULL, "pa0b1", &sprom->pa0b1, 0);
+-	nvram_read_u16(prefix, NULL, "pa0b2", &sprom->pa0b2, 0);
+-	nvram_read_u8(prefix, NULL, "pa0itssit", &sprom->itssi_bg, 0);
+-	nvram_read_u8(prefix, NULL, "pa0maxpwr", &sprom->maxpwr_bg, 0);
+-	nvram_read_u16(prefix, NULL, "pa1b0", &sprom->pa1b0, 0);
+-	nvram_read_u16(prefix, NULL, "pa1b1", &sprom->pa1b1, 0);
+-	nvram_read_u16(prefix, NULL, "pa1b2", &sprom->pa1b2, 0);
+-	nvram_read_u8(prefix, NULL, "pa1itssit", &sprom->itssi_a, 0);
+-	nvram_read_u8(prefix, NULL, "pa1maxpwr", &sprom->maxpwr_a, 0);
+-}
+-
+-static void bcm47xx_fill_sprom_r1(struct ssb_sprom *sprom, const char *prefix)
+-{
+-	nvram_read_u16(prefix, NULL, "boardflags", &sprom->boardflags_lo, 0);
+-	nvram_read_u8(prefix, NULL, "cc", &sprom->country_code, 0);
++	nvram_read_u16(prefix, NULL, "pa0b0", &sprom->pa0b0, 0, fallback);
++	nvram_read_u16(prefix, NULL, "pa0b1", &sprom->pa0b1, 0, fallback);
++	nvram_read_u16(prefix, NULL, "pa0b2", &sprom->pa0b2, 0, fallback);
++	nvram_read_u8(prefix, NULL, "pa0itssit", &sprom->itssi_bg, 0, fallback);
++	nvram_read_u8(prefix, NULL, "pa0maxpwr", &sprom->maxpwr_bg, 0,
++		      fallback);
++	nvram_read_u16(prefix, NULL, "pa1b0", &sprom->pa1b0, 0, fallback);
++	nvram_read_u16(prefix, NULL, "pa1b1", &sprom->pa1b1, 0, fallback);
++	nvram_read_u16(prefix, NULL, "pa1b2", &sprom->pa1b2, 0, fallback);
++	nvram_read_u8(prefix, NULL, "pa1itssit", &sprom->itssi_a, 0, fallback);
++	nvram_read_u8(prefix, NULL, "pa1maxpwr", &sprom->maxpwr_a, 0, fallback);
++}
++
++static void bcm47xx_fill_sprom_r1(struct ssb_sprom *sprom, const char *prefix,
++				  bool fallback)
++{
++	nvram_read_u16(prefix, NULL, "boardflags", &sprom->boardflags_lo, 0,
++		       fallback);
++	nvram_read_u8(prefix, NULL, "cc", &sprom->country_code, 0, fallback);
+ }
+ 
+ static void bcm47xx_fill_sprom_r2389(struct ssb_sprom *sprom,
+-				     const char *prefix)
++				     const char *prefix, bool fallback)
+ {
+-	nvram_read_u8(prefix, NULL, "opo", &sprom->opo, 0);
+-	nvram_read_u16(prefix, NULL, "pa1lob0", &sprom->pa1lob0, 0);
+-	nvram_read_u16(prefix, NULL, "pa1lob1", &sprom->pa1lob1, 0);
+-	nvram_read_u16(prefix, NULL, "pa1lob2", &sprom->pa1lob2, 0);
+-	nvram_read_u16(prefix, NULL, "pa1hib0", &sprom->pa1hib0, 0);
+-	nvram_read_u16(prefix, NULL, "pa1hib1", &sprom->pa1hib1, 0);
+-	nvram_read_u16(prefix, NULL, "pa1hib2", &sprom->pa1hib2, 0);
+-	nvram_read_u8(prefix, NULL, "pa1lomaxpwr", &sprom->maxpwr_al, 0);
+-	nvram_read_u8(prefix, NULL, "pa1himaxpwr", &sprom->maxpwr_ah, 0);
+-}
+-
+-static void bcm47xx_fill_sprom_r389(struct ssb_sprom *sprom, const char *prefix)
+-{
+-	nvram_read_u8(prefix, NULL, "bxa2g", &sprom->bxa2g, 0);
+-	nvram_read_u8(prefix, NULL, "rssisav2g", &sprom->rssisav2g, 0);
+-	nvram_read_u8(prefix, NULL, "rssismc2g", &sprom->rssismc2g, 0);
+-	nvram_read_u8(prefix, NULL, "rssismf2g", &sprom->rssismf2g, 0);
+-	nvram_read_u8(prefix, NULL, "bxa5g", &sprom->bxa5g, 0);
+-	nvram_read_u8(prefix, NULL, "rssisav5g", &sprom->rssisav5g, 0);
+-	nvram_read_u8(prefix, NULL, "rssismc5g", &sprom->rssismc5g, 0);
+-	nvram_read_u8(prefix, NULL, "rssismf5g", &sprom->rssismf5g, 0);
+-	nvram_read_u8(prefix, NULL, "tri2g", &sprom->tri2g, 0);
+-	nvram_read_u8(prefix, NULL, "tri5g", &sprom->tri5g, 0);
+-	nvram_read_u8(prefix, NULL, "tri5gl", &sprom->tri5gl, 0);
+-	nvram_read_u8(prefix, NULL, "tri5gh", &sprom->tri5gh, 0);
+-	nvram_read_s8(prefix, NULL, "rxpo2g", &sprom->rxpo2g, 0);
+-	nvram_read_s8(prefix, NULL, "rxpo5g", &sprom->rxpo5g, 0);
++	nvram_read_u8(prefix, NULL, "opo", &sprom->opo, 0, fallback);
++	nvram_read_u16(prefix, NULL, "pa1lob0", &sprom->pa1lob0, 0, fallback);
++	nvram_read_u16(prefix, NULL, "pa1lob1", &sprom->pa1lob1, 0, fallback);
++	nvram_read_u16(prefix, NULL, "pa1lob2", &sprom->pa1lob2, 0, fallback);
++	nvram_read_u16(prefix, NULL, "pa1hib0", &sprom->pa1hib0, 0, fallback);
++	nvram_read_u16(prefix, NULL, "pa1hib1", &sprom->pa1hib1, 0, fallback);
++	nvram_read_u16(prefix, NULL, "pa1hib2", &sprom->pa1hib2, 0, fallback);
++	nvram_read_u8(prefix, NULL, "pa1lomaxpwr", &sprom->maxpwr_al, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "pa1himaxpwr", &sprom->maxpwr_ah, 0,
++		      fallback);
++}
++
++static void bcm47xx_fill_sprom_r389(struct ssb_sprom *sprom, const char *prefix,
++				    bool fallback)
++{
++	nvram_read_u8(prefix, NULL, "bxa2g", &sprom->bxa2g, 0, fallback);
++	nvram_read_u8(prefix, NULL, "rssisav2g", &sprom->rssisav2g, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "rssismc2g", &sprom->rssismc2g, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "rssismf2g", &sprom->rssismf2g, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "bxa5g", &sprom->bxa5g, 0, fallback);
++	nvram_read_u8(prefix, NULL, "rssisav5g", &sprom->rssisav5g, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "rssismc5g", &sprom->rssismc5g, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "rssismf5g", &sprom->rssismf5g, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "tri2g", &sprom->tri2g, 0, fallback);
++	nvram_read_u8(prefix, NULL, "tri5g", &sprom->tri5g, 0, fallback);
++	nvram_read_u8(prefix, NULL, "tri5gl", &sprom->tri5gl, 0, fallback);
++	nvram_read_u8(prefix, NULL, "tri5gh", &sprom->tri5gh, 0, fallback);
++	nvram_read_s8(prefix, NULL, "rxpo2g", &sprom->rxpo2g, 0, fallback);
++	nvram_read_s8(prefix, NULL, "rxpo5g", &sprom->rxpo5g, 0, fallback);
+ }
+ 
+-static void bcm47xx_fill_sprom_r3(struct ssb_sprom *sprom, const char *prefix)
++static void bcm47xx_fill_sprom_r3(struct ssb_sprom *sprom, const char *prefix,
++				  bool fallback)
+ {
+-	nvram_read_u8(prefix, NULL, "regrev", &sprom->regrev, 0);
++	nvram_read_u8(prefix, NULL, "regrev", &sprom->regrev, 0, fallback);
+ 	nvram_read_leddc(prefix, "leddc", &sprom->leddc_on_time,
+-			 &sprom->leddc_off_time);
++			 &sprom->leddc_off_time, fallback);
+ }
+ 
+ static void bcm47xx_fill_sprom_r4589(struct ssb_sprom *sprom,
+-				     const char *prefix)
++				     const char *prefix, bool fallback)
+ {
+-	nvram_read_u8(prefix, NULL, "regrev", &sprom->regrev, 0);
+-	nvram_read_s8(prefix, NULL, "ag2", &sprom->antenna_gain.a2, 0);
+-	nvram_read_s8(prefix, NULL, "ag3", &sprom->antenna_gain.a3, 0);
+-	nvram_read_u8(prefix, NULL, "txchain", &sprom->txchain, 0xf);
+-	nvram_read_u8(prefix, NULL, "rxchain", &sprom->rxchain, 0xf);
+-	nvram_read_u8(prefix, NULL, "antswitch", &sprom->antswitch, 0xff);
++	nvram_read_u8(prefix, NULL, "regrev", &sprom->regrev, 0, fallback);
++	nvram_read_s8(prefix, NULL, "ag2", &sprom->antenna_gain.a2, 0,
++		      fallback);
++	nvram_read_s8(prefix, NULL, "ag3", &sprom->antenna_gain.a3, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txchain", &sprom->txchain, 0xf, fallback);
++	nvram_read_u8(prefix, NULL, "rxchain", &sprom->rxchain, 0xf, fallback);
++	nvram_read_u8(prefix, NULL, "antswitch", &sprom->antswitch, 0xff,
++		      fallback);
+ 	nvram_read_leddc(prefix, "leddc", &sprom->leddc_on_time,
+-			 &sprom->leddc_off_time);
++			 &sprom->leddc_off_time, fallback);
+ }
+ 
+-static void bcm47xx_fill_sprom_r458(struct ssb_sprom *sprom, const char *prefix)
++static void bcm47xx_fill_sprom_r458(struct ssb_sprom *sprom, const char *prefix,
++				    bool fallback)
+ {
+-	nvram_read_u16(prefix, NULL, "cck2gpo", &sprom->cck2gpo, 0);
+-	nvram_read_u32(prefix, NULL, "ofdm2gpo", &sprom->ofdm2gpo, 0);
+-	nvram_read_u32(prefix, NULL, "ofdm5gpo", &sprom->ofdm5gpo, 0);
+-	nvram_read_u32(prefix, NULL, "ofdm5glpo", &sprom->ofdm5glpo, 0);
+-	nvram_read_u32(prefix, NULL, "ofdm5ghpo", &sprom->ofdm5ghpo, 0);
+-	nvram_read_u16(prefix, NULL, "cddpo", &sprom->cddpo, 0);
+-	nvram_read_u16(prefix, NULL, "stbcpo", &sprom->stbcpo, 0);
+-	nvram_read_u16(prefix, NULL, "bw40po", &sprom->bw40po, 0);
+-	nvram_read_u16(prefix, NULL, "bwduppo", &sprom->bwduppo, 0);
+-	nvram_read_u16(prefix, NULL, "mcs2gpo0", &sprom->mcs2gpo[0], 0);
+-	nvram_read_u16(prefix, NULL, "mcs2gpo1", &sprom->mcs2gpo[1], 0);
+-	nvram_read_u16(prefix, NULL, "mcs2gpo2", &sprom->mcs2gpo[2], 0);
+-	nvram_read_u16(prefix, NULL, "mcs2gpo3", &sprom->mcs2gpo[3], 0);
+-	nvram_read_u16(prefix, NULL, "mcs2gpo4", &sprom->mcs2gpo[4], 0);
+-	nvram_read_u16(prefix, NULL, "mcs2gpo5", &sprom->mcs2gpo[5], 0);
+-	nvram_read_u16(prefix, NULL, "mcs2gpo6", &sprom->mcs2gpo[6], 0);
+-	nvram_read_u16(prefix, NULL, "mcs2gpo7", &sprom->mcs2gpo[7], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5gpo0", &sprom->mcs5gpo[0], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5gpo1", &sprom->mcs5gpo[1], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5gpo2", &sprom->mcs5gpo[2], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5gpo3", &sprom->mcs5gpo[3], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5gpo4", &sprom->mcs5gpo[4], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5gpo5", &sprom->mcs5gpo[5], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5gpo6", &sprom->mcs5gpo[6], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5gpo7", &sprom->mcs5gpo[7], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5glpo0", &sprom->mcs5glpo[0], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5glpo1", &sprom->mcs5glpo[1], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5glpo2", &sprom->mcs5glpo[2], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5glpo3", &sprom->mcs5glpo[3], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5glpo4", &sprom->mcs5glpo[4], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5glpo5", &sprom->mcs5glpo[5], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5glpo6", &sprom->mcs5glpo[6], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5glpo7", &sprom->mcs5glpo[7], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5ghpo0", &sprom->mcs5ghpo[0], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5ghpo1", &sprom->mcs5ghpo[1], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5ghpo2", &sprom->mcs5ghpo[2], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5ghpo3", &sprom->mcs5ghpo[3], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5ghpo4", &sprom->mcs5ghpo[4], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5ghpo5", &sprom->mcs5ghpo[5], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5ghpo6", &sprom->mcs5ghpo[6], 0);
+-	nvram_read_u16(prefix, NULL, "mcs5ghpo7", &sprom->mcs5ghpo[7], 0);
+-}
+-
+-static void bcm47xx_fill_sprom_r45(struct ssb_sprom *sprom, const char *prefix)
+-{
+-	nvram_read_u8(prefix, NULL, "txpid2ga0", &sprom->txpid2g[0], 0);
+-	nvram_read_u8(prefix, NULL, "txpid2ga1", &sprom->txpid2g[1], 0);
+-	nvram_read_u8(prefix, NULL, "txpid2ga2", &sprom->txpid2g[2], 0);
+-	nvram_read_u8(prefix, NULL, "txpid2ga3", &sprom->txpid2g[3], 0);
+-	nvram_read_u8(prefix, NULL, "txpid5ga0", &sprom->txpid5g[0], 0);
+-	nvram_read_u8(prefix, NULL, "txpid5ga1", &sprom->txpid5g[1], 0);
+-	nvram_read_u8(prefix, NULL, "txpid5ga2", &sprom->txpid5g[2], 0);
+-	nvram_read_u8(prefix, NULL, "txpid5ga3", &sprom->txpid5g[3], 0);
+-	nvram_read_u8(prefix, NULL, "txpid5gla0", &sprom->txpid5gl[0], 0);
+-	nvram_read_u8(prefix, NULL, "txpid5gla1", &sprom->txpid5gl[1], 0);
+-	nvram_read_u8(prefix, NULL, "txpid5gla2", &sprom->txpid5gl[2], 0);
+-	nvram_read_u8(prefix, NULL, "txpid5gla3", &sprom->txpid5gl[3], 0);
+-	nvram_read_u8(prefix, NULL, "txpid5gha0", &sprom->txpid5gh[0], 0);
+-	nvram_read_u8(prefix, NULL, "txpid5gha1", &sprom->txpid5gh[1], 0);
+-	nvram_read_u8(prefix, NULL, "txpid5gha2", &sprom->txpid5gh[2], 0);
+-	nvram_read_u8(prefix, NULL, "txpid5gha3", &sprom->txpid5gh[3], 0);
++	nvram_read_u16(prefix, NULL, "cck2gpo", &sprom->cck2gpo, 0, fallback);
++	nvram_read_u32(prefix, NULL, "ofdm2gpo", &sprom->ofdm2gpo, 0, fallback);
++	nvram_read_u32(prefix, NULL, "ofdm5gpo", &sprom->ofdm5gpo, 0, fallback);
++	nvram_read_u32(prefix, NULL, "ofdm5glpo", &sprom->ofdm5glpo, 0,
++		       fallback);
++	nvram_read_u32(prefix, NULL, "ofdm5ghpo", &sprom->ofdm5ghpo, 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "cddpo", &sprom->cddpo, 0, fallback);
++	nvram_read_u16(prefix, NULL, "stbcpo", &sprom->stbcpo, 0, fallback);
++	nvram_read_u16(prefix, NULL, "bw40po", &sprom->bw40po, 0, fallback);
++	nvram_read_u16(prefix, NULL, "bwduppo", &sprom->bwduppo, 0, fallback);
++	nvram_read_u16(prefix, NULL, "mcs2gpo0", &sprom->mcs2gpo[0], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs2gpo1", &sprom->mcs2gpo[1], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs2gpo2", &sprom->mcs2gpo[2], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs2gpo3", &sprom->mcs2gpo[3], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs2gpo4", &sprom->mcs2gpo[4], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs2gpo5", &sprom->mcs2gpo[5], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs2gpo6", &sprom->mcs2gpo[6], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs2gpo7", &sprom->mcs2gpo[7], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5gpo0", &sprom->mcs5gpo[0], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5gpo1", &sprom->mcs5gpo[1], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5gpo2", &sprom->mcs5gpo[2], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5gpo3", &sprom->mcs5gpo[3], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5gpo4", &sprom->mcs5gpo[4], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5gpo5", &sprom->mcs5gpo[5], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5gpo6", &sprom->mcs5gpo[6], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5gpo7", &sprom->mcs5gpo[7], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5glpo0", &sprom->mcs5glpo[0], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5glpo1", &sprom->mcs5glpo[1], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5glpo2", &sprom->mcs5glpo[2], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5glpo3", &sprom->mcs5glpo[3], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5glpo4", &sprom->mcs5glpo[4], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5glpo5", &sprom->mcs5glpo[5], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5glpo6", &sprom->mcs5glpo[6], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5glpo7", &sprom->mcs5glpo[7], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5ghpo0", &sprom->mcs5ghpo[0], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5ghpo1", &sprom->mcs5ghpo[1], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5ghpo2", &sprom->mcs5ghpo[2], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5ghpo3", &sprom->mcs5ghpo[3], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5ghpo4", &sprom->mcs5ghpo[4], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5ghpo5", &sprom->mcs5ghpo[5], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5ghpo6", &sprom->mcs5ghpo[6], 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs5ghpo7", &sprom->mcs5ghpo[7], 0,
++		       fallback);
++}
++
++static void bcm47xx_fill_sprom_r45(struct ssb_sprom *sprom, const char *prefix,
++				   bool fallback)
++{
++	nvram_read_u8(prefix, NULL, "txpid2ga0", &sprom->txpid2g[0], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid2ga1", &sprom->txpid2g[1], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid2ga2", &sprom->txpid2g[2], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid2ga3", &sprom->txpid2g[3], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid5ga0", &sprom->txpid5g[0], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid5ga1", &sprom->txpid5g[1], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid5ga2", &sprom->txpid5g[2], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid5ga3", &sprom->txpid5g[3], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid5gla0", &sprom->txpid5gl[0], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid5gla1", &sprom->txpid5gl[1], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid5gla2", &sprom->txpid5gl[2], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid5gla3", &sprom->txpid5gl[3], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid5gha0", &sprom->txpid5gh[0], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid5gha1", &sprom->txpid5gh[1], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid5gha2", &sprom->txpid5gh[2], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "txpid5gha3", &sprom->txpid5gh[3], 0,
++		      fallback);
+ }
+ 
+-static void bcm47xx_fill_sprom_r89(struct ssb_sprom *sprom, const char *prefix)
++static void bcm47xx_fill_sprom_r89(struct ssb_sprom *sprom, const char *prefix,
++				   bool fallback)
+ {
+-	nvram_read_u8(prefix, NULL, "tssipos2g", &sprom->fem.ghz2.tssipos, 0);
++	nvram_read_u8(prefix, NULL, "tssipos2g", &sprom->fem.ghz2.tssipos, 0,
++		      fallback);
+ 	nvram_read_u8(prefix, NULL, "extpagain2g",
+-		      &sprom->fem.ghz2.extpa_gain, 0);
++		      &sprom->fem.ghz2.extpa_gain, 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "pdetrange2g",
+-		      &sprom->fem.ghz2.pdet_range, 0);
+-	nvram_read_u8(prefix, NULL, "triso2g", &sprom->fem.ghz2.tr_iso, 0);
+-	nvram_read_u8(prefix, NULL, "antswctl2g", &sprom->fem.ghz2.antswlut, 0);
+-	nvram_read_u8(prefix, NULL, "tssipos5g", &sprom->fem.ghz5.tssipos, 0);
++		      &sprom->fem.ghz2.pdet_range, 0, fallback);
++	nvram_read_u8(prefix, NULL, "triso2g", &sprom->fem.ghz2.tr_iso, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "antswctl2g", &sprom->fem.ghz2.antswlut, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "tssipos5g", &sprom->fem.ghz5.tssipos, 0,
++		      fallback);
+ 	nvram_read_u8(prefix, NULL, "extpagain5g",
+-		      &sprom->fem.ghz5.extpa_gain, 0);
++		      &sprom->fem.ghz5.extpa_gain, 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "pdetrange5g",
+-		      &sprom->fem.ghz5.pdet_range, 0);
+-	nvram_read_u8(prefix, NULL, "triso5g", &sprom->fem.ghz5.tr_iso, 0);
+-	nvram_read_u8(prefix, NULL, "antswctl5g", &sprom->fem.ghz5.antswlut, 0);
+-	nvram_read_u8(prefix, NULL, "tempthresh", &sprom->tempthresh, 0);
+-	nvram_read_u8(prefix, NULL, "tempoffset", &sprom->tempoffset, 0);
+-	nvram_read_u16(prefix, NULL, "rawtempsense", &sprom->rawtempsense, 0);
+-	nvram_read_u8(prefix, NULL, "measpower", &sprom->measpower, 0);
++		      &sprom->fem.ghz5.pdet_range, 0, fallback);
++	nvram_read_u8(prefix, NULL, "triso5g", &sprom->fem.ghz5.tr_iso, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "antswctl5g", &sprom->fem.ghz5.antswlut, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "tempthresh", &sprom->tempthresh, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "tempoffset", &sprom->tempoffset, 0,
++		      fallback);
++	nvram_read_u16(prefix, NULL, "rawtempsense", &sprom->rawtempsense, 0,
++		       fallback);
++	nvram_read_u8(prefix, NULL, "measpower", &sprom->measpower, 0,
++		      fallback);
+ 	nvram_read_u8(prefix, NULL, "tempsense_slope",
+-		      &sprom->tempsense_slope, 0);
+-	nvram_read_u8(prefix, NULL, "tempcorrx", &sprom->tempcorrx, 0);
++		      &sprom->tempsense_slope, 0, fallback);
++	nvram_read_u8(prefix, NULL, "tempcorrx", &sprom->tempcorrx, 0,
++		       fallback);
+ 	nvram_read_u8(prefix, NULL, "tempsense_option",
+-		      &sprom->tempsense_option, 0);
++		      &sprom->tempsense_option, 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "freqoffset_corr",
+-		      &sprom->freqoffset_corr, 0);
+-	nvram_read_u8(prefix, NULL, "iqcal_swp_dis", &sprom->iqcal_swp_dis, 0);
+-	nvram_read_u8(prefix, NULL, "hw_iqcal_en", &sprom->hw_iqcal_en, 0);
+-	nvram_read_u8(prefix, NULL, "elna2g", &sprom->elna2g, 0);
+-	nvram_read_u8(prefix, NULL, "elna5g", &sprom->elna5g, 0);
++		      &sprom->freqoffset_corr, 0, fallback);
++	nvram_read_u8(prefix, NULL, "iqcal_swp_dis", &sprom->iqcal_swp_dis, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "hw_iqcal_en", &sprom->hw_iqcal_en, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "elna2g", &sprom->elna2g, 0, fallback);
++	nvram_read_u8(prefix, NULL, "elna5g", &sprom->elna5g, 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "phycal_tempdelta",
+-		      &sprom->phycal_tempdelta, 0);
+-	nvram_read_u8(prefix, NULL, "temps_period", &sprom->temps_period, 0);
++		      &sprom->phycal_tempdelta, 0, fallback);
++	nvram_read_u8(prefix, NULL, "temps_period", &sprom->temps_period, 0,
++		      fallback);
+ 	nvram_read_u8(prefix, NULL, "temps_hysteresis",
+-		      &sprom->temps_hysteresis, 0);
+-	nvram_read_u8(prefix, NULL, "measpower1", &sprom->measpower1, 0);
+-	nvram_read_u8(prefix, NULL, "measpower2", &sprom->measpower2, 0);
++		      &sprom->temps_hysteresis, 0, fallback);
++	nvram_read_u8(prefix, NULL, "measpower1", &sprom->measpower1, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "measpower2", &sprom->measpower2, 0,
++		      fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr2ga0",
+-		      &sprom->rxgainerr2ga[0], 0);
++		      &sprom->rxgainerr2ga[0], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr2ga1",
+-		      &sprom->rxgainerr2ga[1], 0);
++		      &sprom->rxgainerr2ga[1], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr2ga2",
+-		      &sprom->rxgainerr2ga[2], 0);
++		      &sprom->rxgainerr2ga[2], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr5gla0",
+-		      &sprom->rxgainerr5gla[0], 0);
++		      &sprom->rxgainerr5gla[0], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr5gla1",
+-		      &sprom->rxgainerr5gla[1], 0);
++		      &sprom->rxgainerr5gla[1], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr5gla2",
+-		      &sprom->rxgainerr5gla[2], 0);
++		      &sprom->rxgainerr5gla[2], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr5gma0",
+-		      &sprom->rxgainerr5gma[0], 0);
++		      &sprom->rxgainerr5gma[0], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr5gma1",
+-		      &sprom->rxgainerr5gma[1], 0);
++		      &sprom->rxgainerr5gma[1], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr5gma2",
+-		      &sprom->rxgainerr5gma[2], 0);
++		      &sprom->rxgainerr5gma[2], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr5gha0",
+-		      &sprom->rxgainerr5gha[0], 0);
++		      &sprom->rxgainerr5gha[0], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr5gha1",
+-		      &sprom->rxgainerr5gha[1], 0);
++		      &sprom->rxgainerr5gha[1], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr5gha2",
+-		      &sprom->rxgainerr5gha[2], 0);
++		      &sprom->rxgainerr5gha[2], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr5gua0",
+-		      &sprom->rxgainerr5gua[0], 0);
++		      &sprom->rxgainerr5gua[0], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr5gua1",
+-		      &sprom->rxgainerr5gua[1], 0);
++		      &sprom->rxgainerr5gua[1], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "rxgainerr5gua2",
+-		      &sprom->rxgainerr5gua[2], 0);
+-	nvram_read_u8(prefix, NULL, "noiselvl2ga0", &sprom->noiselvl2ga[0], 0);
+-	nvram_read_u8(prefix, NULL, "noiselvl2ga1", &sprom->noiselvl2ga[1], 0);
+-	nvram_read_u8(prefix, NULL, "noiselvl2ga2", &sprom->noiselvl2ga[2], 0);
++		      &sprom->rxgainerr5gua[2], 0, fallback);
++	nvram_read_u8(prefix, NULL, "noiselvl2ga0", &sprom->noiselvl2ga[0], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "noiselvl2ga1", &sprom->noiselvl2ga[1], 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "noiselvl2ga2", &sprom->noiselvl2ga[2], 0,
++		      fallback);
+ 	nvram_read_u8(prefix, NULL, "noiselvl5gla0",
+-		      &sprom->noiselvl5gla[0], 0);
++		      &sprom->noiselvl5gla[0], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "noiselvl5gla1",
+-		      &sprom->noiselvl5gla[1], 0);
++		      &sprom->noiselvl5gla[1], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "noiselvl5gla2",
+-		      &sprom->noiselvl5gla[2], 0);
++		      &sprom->noiselvl5gla[2], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "noiselvl5gma0",
+-		      &sprom->noiselvl5gma[0], 0);
++		      &sprom->noiselvl5gma[0], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "noiselvl5gma1",
+-		      &sprom->noiselvl5gma[1], 0);
++		      &sprom->noiselvl5gma[1], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "noiselvl5gma2",
+-		      &sprom->noiselvl5gma[2], 0);
++		      &sprom->noiselvl5gma[2], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "noiselvl5gha0",
+-		      &sprom->noiselvl5gha[0], 0);
++		      &sprom->noiselvl5gha[0], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "noiselvl5gha1",
+-		      &sprom->noiselvl5gha[1], 0);
++		      &sprom->noiselvl5gha[1], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "noiselvl5gha2",
+-		      &sprom->noiselvl5gha[2], 0);
++		      &sprom->noiselvl5gha[2], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "noiselvl5gua0",
+-		      &sprom->noiselvl5gua[0], 0);
++		      &sprom->noiselvl5gua[0], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "noiselvl5gua1",
+-		      &sprom->noiselvl5gua[1], 0);
++		      &sprom->noiselvl5gua[1], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "noiselvl5gua2",
+-		      &sprom->noiselvl5gua[2], 0);
++		      &sprom->noiselvl5gua[2], 0, fallback);
+ 	nvram_read_u8(prefix, NULL, "pcieingress_war",
+-		      &sprom->pcieingress_war, 0);
++		      &sprom->pcieingress_war, 0, fallback);
+ }
+ 
+-static void bcm47xx_fill_sprom_r9(struct ssb_sprom *sprom, const char *prefix)
++static void bcm47xx_fill_sprom_r9(struct ssb_sprom *sprom, const char *prefix,
++				  bool fallback)
+ {
+-	nvram_read_u16(prefix, NULL, "cckbw202gpo", &sprom->cckbw202gpo, 0);
+-	nvram_read_u16(prefix, NULL, "cckbw20ul2gpo", &sprom->cckbw20ul2gpo, 0);
++	nvram_read_u16(prefix, NULL, "cckbw202gpo", &sprom->cckbw202gpo, 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "cckbw20ul2gpo", &sprom->cckbw20ul2gpo, 0,
++		       fallback);
+ 	nvram_read_u32(prefix, NULL, "legofdmbw202gpo",
+-		       &sprom->legofdmbw202gpo, 0);
++		       &sprom->legofdmbw202gpo, 0, fallback);
+ 	nvram_read_u32(prefix, NULL, "legofdmbw20ul2gpo",
+-		       &sprom->legofdmbw20ul2gpo, 0);
++		       &sprom->legofdmbw20ul2gpo, 0, fallback);
+ 	nvram_read_u32(prefix, NULL, "legofdmbw205glpo",
+-		       &sprom->legofdmbw205glpo, 0);
++		       &sprom->legofdmbw205glpo, 0, fallback);
+ 	nvram_read_u32(prefix, NULL, "legofdmbw20ul5glpo",
+-		       &sprom->legofdmbw20ul5glpo, 0);
++		       &sprom->legofdmbw20ul5glpo, 0, fallback);
+ 	nvram_read_u32(prefix, NULL, "legofdmbw205gmpo",
+-		       &sprom->legofdmbw205gmpo, 0);
++		       &sprom->legofdmbw205gmpo, 0, fallback);
+ 	nvram_read_u32(prefix, NULL, "legofdmbw20ul5gmpo",
+-		       &sprom->legofdmbw20ul5gmpo, 0);
++		       &sprom->legofdmbw20ul5gmpo, 0, fallback);
+ 	nvram_read_u32(prefix, NULL, "legofdmbw205ghpo",
+-		       &sprom->legofdmbw205ghpo, 0);
++		       &sprom->legofdmbw205ghpo, 0, fallback);
+ 	nvram_read_u32(prefix, NULL, "legofdmbw20ul5ghpo",
+-		       &sprom->legofdmbw20ul5ghpo, 0);
+-	nvram_read_u32(prefix, NULL, "mcsbw202gpo", &sprom->mcsbw202gpo, 0);
+-	nvram_read_u32(prefix, NULL, "mcsbw20ul2gpo", &sprom->mcsbw20ul2gpo, 0);
+-	nvram_read_u32(prefix, NULL, "mcsbw402gpo", &sprom->mcsbw402gpo, 0);
+-	nvram_read_u32(prefix, NULL, "mcsbw205glpo", &sprom->mcsbw205glpo, 0);
++		       &sprom->legofdmbw20ul5ghpo, 0, fallback);
++	nvram_read_u32(prefix, NULL, "mcsbw202gpo", &sprom->mcsbw202gpo, 0,
++		       fallback);
++	nvram_read_u32(prefix, NULL, "mcsbw20ul2gpo", &sprom->mcsbw20ul2gpo, 0,
++		       fallback);
++	nvram_read_u32(prefix, NULL, "mcsbw402gpo", &sprom->mcsbw402gpo, 0,
++		       fallback);
++	nvram_read_u32(prefix, NULL, "mcsbw205glpo", &sprom->mcsbw205glpo, 0,
++		       fallback);
+ 	nvram_read_u32(prefix, NULL, "mcsbw20ul5glpo",
+-		       &sprom->mcsbw20ul5glpo, 0);
+-	nvram_read_u32(prefix, NULL, "mcsbw405glpo", &sprom->mcsbw405glpo, 0);
+-	nvram_read_u32(prefix, NULL, "mcsbw205gmpo", &sprom->mcsbw205gmpo, 0);
++		       &sprom->mcsbw20ul5glpo, 0, fallback);
++	nvram_read_u32(prefix, NULL, "mcsbw405glpo", &sprom->mcsbw405glpo, 0,
++		       fallback);
++	nvram_read_u32(prefix, NULL, "mcsbw205gmpo", &sprom->mcsbw205gmpo, 0,
++		       fallback);
+ 	nvram_read_u32(prefix, NULL, "mcsbw20ul5gmpo",
+-		       &sprom->mcsbw20ul5gmpo, 0);
+-	nvram_read_u32(prefix, NULL, "mcsbw405gmpo", &sprom->mcsbw405gmpo, 0);
+-	nvram_read_u32(prefix, NULL, "mcsbw205ghpo", &sprom->mcsbw205ghpo, 0);
++		       &sprom->mcsbw20ul5gmpo, 0, fallback);
++	nvram_read_u32(prefix, NULL, "mcsbw405gmpo", &sprom->mcsbw405gmpo, 0,
++		       fallback);
++	nvram_read_u32(prefix, NULL, "mcsbw205ghpo", &sprom->mcsbw205ghpo, 0,
++		       fallback);
+ 	nvram_read_u32(prefix, NULL, "mcsbw20ul5ghpo",
+-		       &sprom->mcsbw20ul5ghpo, 0);
+-	nvram_read_u32(prefix, NULL, "mcsbw405ghpo", &sprom->mcsbw405ghpo, 0);
+-	nvram_read_u16(prefix, NULL, "mcs32po", &sprom->mcs32po, 0);
++		       &sprom->mcsbw20ul5ghpo, 0, fallback);
++	nvram_read_u32(prefix, NULL, "mcsbw405ghpo", &sprom->mcsbw405ghpo, 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "mcs32po", &sprom->mcs32po, 0, fallback);
+ 	nvram_read_u16(prefix, NULL, "legofdm40duppo",
+-		       &sprom->legofdm40duppo, 0);
+-	nvram_read_u8(prefix, NULL, "sar2g", &sprom->sar2g, 0);
+-	nvram_read_u8(prefix, NULL, "sar5g", &sprom->sar5g, 0);
++		       &sprom->legofdm40duppo, 0, fallback);
++	nvram_read_u8(prefix, NULL, "sar2g", &sprom->sar2g, 0, fallback);
++	nvram_read_u8(prefix, NULL, "sar5g", &sprom->sar5g, 0, fallback);
+ }
+ 
+ static void bcm47xx_fill_sprom_path_r4589(struct ssb_sprom *sprom,
+-					  const char *prefix)
++					  const char *prefix, bool fallback)
+ {
+ 	char postfix[2];
+ 	int i;
+@@ -464,46 +572,46 @@ static void bcm47xx_fill_sprom_path_r458
+ 		struct ssb_sprom_core_pwr_info *pwr_info = &sprom->core_pwr_info[i];
+ 		snprintf(postfix, sizeof(postfix), "%i", i);
+ 		nvram_read_u8(prefix, postfix, "maxp2ga",
+-			      &pwr_info->maxpwr_2g, 0);
++			      &pwr_info->maxpwr_2g, 0, fallback);
+ 		nvram_read_u8(prefix, postfix, "itt2ga",
+-			      &pwr_info->itssi_2g, 0);
++			      &pwr_info->itssi_2g, 0, fallback);
+ 		nvram_read_u8(prefix, postfix, "itt5ga",
+-			      &pwr_info->itssi_5g, 0);
++			      &pwr_info->itssi_5g, 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa2gw0a",
+-			       &pwr_info->pa_2g[0], 0);
++			       &pwr_info->pa_2g[0], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa2gw1a",
+-			       &pwr_info->pa_2g[1], 0);
++			       &pwr_info->pa_2g[1], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa2gw2a",
+-			       &pwr_info->pa_2g[2], 0);
++			       &pwr_info->pa_2g[2], 0, fallback);
+ 		nvram_read_u8(prefix, postfix, "maxp5ga",
+-			      &pwr_info->maxpwr_5g, 0);
++			      &pwr_info->maxpwr_5g, 0, fallback);
+ 		nvram_read_u8(prefix, postfix, "maxp5gha",
+-			      &pwr_info->maxpwr_5gh, 0);
++			      &pwr_info->maxpwr_5gh, 0, fallback);
+ 		nvram_read_u8(prefix, postfix, "maxp5gla",
+-			      &pwr_info->maxpwr_5gl, 0);
++			      &pwr_info->maxpwr_5gl, 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa5gw0a",
+-			       &pwr_info->pa_5g[0], 0);
++			       &pwr_info->pa_5g[0], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa5gw1a",
+-			       &pwr_info->pa_5g[1], 0);
++			       &pwr_info->pa_5g[1], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa5gw2a",
+-			       &pwr_info->pa_5g[2], 0);
++			       &pwr_info->pa_5g[2], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa5glw0a",
+-			       &pwr_info->pa_5gl[0], 0);
++			       &pwr_info->pa_5gl[0], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa5glw1a",
+-			       &pwr_info->pa_5gl[1], 0);
++			       &pwr_info->pa_5gl[1], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa5glw2a",
+-			       &pwr_info->pa_5gl[2], 0);
++			       &pwr_info->pa_5gl[2], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa5ghw0a",
+-			       &pwr_info->pa_5gh[0], 0);
++			       &pwr_info->pa_5gh[0], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa5ghw1a",
+-			       &pwr_info->pa_5gh[1], 0);
++			       &pwr_info->pa_5gh[1], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa5ghw2a",
+-			       &pwr_info->pa_5gh[2], 0);
++			       &pwr_info->pa_5gh[2], 0, fallback);
+ 	}
+ }
+ 
+ static void bcm47xx_fill_sprom_path_r45(struct ssb_sprom *sprom,
+-					const char *prefix)
++					const char *prefix, bool fallback)
+ {
+ 	char postfix[2];
+ 	int i;
+@@ -512,104 +620,112 @@ static void bcm47xx_fill_sprom_path_r45(
+ 		struct ssb_sprom_core_pwr_info *pwr_info = &sprom->core_pwr_info[i];
+ 		snprintf(postfix, sizeof(postfix), "%i", i);
+ 		nvram_read_u16(prefix, postfix, "pa2gw3a",
+-			       &pwr_info->pa_2g[3], 0);
++			       &pwr_info->pa_2g[3], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa5gw3a",
+-			       &pwr_info->pa_5g[3], 0);
++			       &pwr_info->pa_5g[3], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa5glw3a",
+-			       &pwr_info->pa_5gl[3], 0);
++			       &pwr_info->pa_5gl[3], 0, fallback);
+ 		nvram_read_u16(prefix, postfix, "pa5ghw3a",
+-			       &pwr_info->pa_5gh[3], 0);
++			       &pwr_info->pa_5gh[3], 0, fallback);
+ 	}
+ }
+ 
+-void bcm47xx_fill_sprom_ethernet(struct ssb_sprom *sprom, const char *prefix)
+-{
+-	nvram_read_macaddr(prefix, "et0macaddr", &sprom->et0mac);
+-	nvram_read_u8(prefix, NULL, "et0mdcport", &sprom->et0mdcport, 0);
+-	nvram_read_u8(prefix, NULL, "et0phyaddr", &sprom->et0phyaddr, 0);
+-
+-	nvram_read_macaddr(prefix, "et1macaddr", &sprom->et1mac);
+-	nvram_read_u8(prefix, NULL, "et1mdcport", &sprom->et1mdcport, 0);
+-	nvram_read_u8(prefix, NULL, "et1phyaddr", &sprom->et1phyaddr, 0);
+-
+-	nvram_read_macaddr(prefix, "macaddr", &sprom->il0mac);
+-	nvram_read_macaddr(prefix, "il0macaddr", &sprom->il0mac);
+-}
+-
+-static void bcm47xx_fill_board_data(struct ssb_sprom *sprom, const char *prefix)
++static void bcm47xx_fill_sprom_ethernet(struct ssb_sprom *sprom,
++					const char *prefix, bool fallback)
+ {
+-	nvram_read_u16(prefix, NULL, "boardrev", &sprom->board_rev, 0);
+-	if (!sprom->board_rev)
+-		nvram_read_u16(NULL, NULL, "boardrev", &sprom->board_rev, 0);
+-	nvram_read_u16(prefix, NULL, "boardnum", &sprom->board_num, 0);
+-	nvram_read_u16(prefix, NULL, "boardtype", &sprom->board_type, 0);
++	nvram_read_macaddr(prefix, "et0macaddr", &sprom->et0mac, fallback);
++	nvram_read_u8(prefix, NULL, "et0mdcport", &sprom->et0mdcport, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "et0phyaddr", &sprom->et0phyaddr, 0,
++		      fallback);
++
++	nvram_read_macaddr(prefix, "et1macaddr", &sprom->et1mac, fallback);
++	nvram_read_u8(prefix, NULL, "et1mdcport", &sprom->et1mdcport, 0,
++		      fallback);
++	nvram_read_u8(prefix, NULL, "et1phyaddr", &sprom->et1phyaddr, 0,
++		      fallback);
++
++	nvram_read_macaddr(prefix, "macaddr", &sprom->il0mac, fallback);
++	nvram_read_macaddr(prefix, "il0macaddr", &sprom->il0mac, fallback);
++}
++
++static void bcm47xx_fill_board_data(struct ssb_sprom *sprom, const char *prefix,
++				    bool fallback)
++{
++	nvram_read_u16(prefix, NULL, "boardrev", &sprom->board_rev, 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "boardnum", &sprom->board_num, 0,
++		       fallback);
++	nvram_read_u16(prefix, NULL, "boardtype", &sprom->board_type, 0,
++		       fallback);
+ 	nvram_read_u32_2(prefix, "boardflags", &sprom->boardflags_lo,
+-			 &sprom->boardflags_hi);
++			 &sprom->boardflags_hi, fallback);
+ 	nvram_read_u32_2(prefix, "boardflags2", &sprom->boardflags2_lo,
+-			 &sprom->boardflags2_hi);
++			 &sprom->boardflags2_hi, fallback);
+ }
+ 
+-void bcm47xx_fill_sprom(struct ssb_sprom *sprom, const char *prefix)
++void bcm47xx_fill_sprom(struct ssb_sprom *sprom, const char *prefix,
++			bool fallback)
+ {
+-	bcm47xx_fill_sprom_ethernet(sprom, prefix);
+-	bcm47xx_fill_board_data(sprom, prefix);
++	bcm47xx_fill_sprom_ethernet(sprom, prefix, fallback);
++	bcm47xx_fill_board_data(sprom, prefix, fallback);
+ 
+-	nvram_read_u8(prefix, NULL, "sromrev", &sprom->revision, 0);
++	nvram_read_u8(prefix, NULL, "sromrev", &sprom->revision, 0, fallback);
+ 
+ 	switch (sprom->revision) {
+ 	case 1:
+-		bcm47xx_fill_sprom_r1234589(sprom, prefix);
+-		bcm47xx_fill_sprom_r12389(sprom, prefix);
+-		bcm47xx_fill_sprom_r1(sprom, prefix);
++		bcm47xx_fill_sprom_r1234589(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r12389(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r1(sprom, prefix, fallback);
+ 		break;
+ 	case 2:
+-		bcm47xx_fill_sprom_r1234589(sprom, prefix);
+-		bcm47xx_fill_sprom_r12389(sprom, prefix);
+-		bcm47xx_fill_sprom_r2389(sprom, prefix);
++		bcm47xx_fill_sprom_r1234589(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r12389(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r2389(sprom, prefix, fallback);
+ 		break;
+ 	case 3:
+-		bcm47xx_fill_sprom_r1234589(sprom, prefix);
+-		bcm47xx_fill_sprom_r12389(sprom, prefix);
+-		bcm47xx_fill_sprom_r2389(sprom, prefix);
+-		bcm47xx_fill_sprom_r389(sprom, prefix);
+-		bcm47xx_fill_sprom_r3(sprom, prefix);
++		bcm47xx_fill_sprom_r1234589(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r12389(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r2389(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r389(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r3(sprom, prefix, fallback);
+ 		break;
+ 	case 4:
+ 	case 5:
+-		bcm47xx_fill_sprom_r1234589(sprom, prefix);
+-		bcm47xx_fill_sprom_r4589(sprom, prefix);
+-		bcm47xx_fill_sprom_r458(sprom, prefix);
+-		bcm47xx_fill_sprom_r45(sprom, prefix);
+-		bcm47xx_fill_sprom_path_r4589(sprom, prefix);
+-		bcm47xx_fill_sprom_path_r45(sprom, prefix);
++		bcm47xx_fill_sprom_r1234589(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r4589(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r458(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r45(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_path_r4589(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_path_r45(sprom, prefix, fallback);
+ 		break;
+ 	case 8:
+-		bcm47xx_fill_sprom_r1234589(sprom, prefix);
+-		bcm47xx_fill_sprom_r12389(sprom, prefix);
+-		bcm47xx_fill_sprom_r2389(sprom, prefix);
+-		bcm47xx_fill_sprom_r389(sprom, prefix);
+-		bcm47xx_fill_sprom_r4589(sprom, prefix);
+-		bcm47xx_fill_sprom_r458(sprom, prefix);
+-		bcm47xx_fill_sprom_r89(sprom, prefix);
+-		bcm47xx_fill_sprom_path_r4589(sprom, prefix);
++		bcm47xx_fill_sprom_r1234589(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r12389(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r2389(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r389(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r4589(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r458(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r89(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_path_r4589(sprom, prefix, fallback);
+ 		break;
+ 	case 9:
+-		bcm47xx_fill_sprom_r1234589(sprom, prefix);
+-		bcm47xx_fill_sprom_r12389(sprom, prefix);
+-		bcm47xx_fill_sprom_r2389(sprom, prefix);
+-		bcm47xx_fill_sprom_r389(sprom, prefix);
+-		bcm47xx_fill_sprom_r4589(sprom, prefix);
+-		bcm47xx_fill_sprom_r89(sprom, prefix);
+-		bcm47xx_fill_sprom_r9(sprom, prefix);
+-		bcm47xx_fill_sprom_path_r4589(sprom, prefix);
++		bcm47xx_fill_sprom_r1234589(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r12389(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r2389(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r389(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r4589(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r89(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r9(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_path_r4589(sprom, prefix, fallback);
+ 		break;
+ 	default:
+ 		pr_warn("Unsupported SPROM revision %d detected. Will extract"
+ 			" v1\n", sprom->revision);
+ 		sprom->revision = 1;
+-		bcm47xx_fill_sprom_r1234589(sprom, prefix);
+-		bcm47xx_fill_sprom_r12389(sprom, prefix);
+-		bcm47xx_fill_sprom_r1(sprom, prefix);
++		bcm47xx_fill_sprom_r1234589(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r12389(sprom, prefix, fallback);
++		bcm47xx_fill_sprom_r1(sprom, prefix, fallback);
+ 	}
+ }
+ 
+@@ -617,11 +733,12 @@ void bcm47xx_fill_sprom(struct ssb_sprom
+ void bcm47xx_fill_ssb_boardinfo(struct ssb_boardinfo *boardinfo,
+ 				const char *prefix)
+ {
+-	nvram_read_u16(prefix, NULL, "boardvendor", &boardinfo->vendor, 0);
++	nvram_read_u16(prefix, NULL, "boardvendor", &boardinfo->vendor, 0,
++		       true);
+ 	if (!boardinfo->vendor)
+ 		boardinfo->vendor = SSB_BOARDVENDOR_BCM;
+ 
+-	nvram_read_u16(prefix, NULL, "boardtype", &boardinfo->type, 0);
++	nvram_read_u16(prefix, NULL, "boardtype", &boardinfo->type, 0, true);
+ }
+ #endif
+ 
+@@ -629,10 +746,11 @@ void bcm47xx_fill_ssb_boardinfo(struct s
+ void bcm47xx_fill_bcma_boardinfo(struct bcma_boardinfo *boardinfo,
+ 				 const char *prefix)
+ {
+-	nvram_read_u16(prefix, NULL, "boardvendor", &boardinfo->vendor, 0);
++	nvram_read_u16(prefix, NULL, "boardvendor", &boardinfo->vendor, 0,
++		       true);
+ 	if (!boardinfo->vendor)
+ 		boardinfo->vendor = SSB_BOARDVENDOR_BCM;
+ 
+-	nvram_read_u16(prefix, NULL, "boardtype", &boardinfo->type, 0);
++	nvram_read_u16(prefix, NULL, "boardtype", &boardinfo->type, 0, true);
+ }
+ #endif
+--- a/arch/mips/include/asm/mach-bcm47xx/bcm47xx.h
++++ b/arch/mips/include/asm/mach-bcm47xx/bcm47xx.h
+@@ -44,8 +44,8 @@ union bcm47xx_bus {
+ extern union bcm47xx_bus bcm47xx_bus;
+ extern enum bcm47xx_bus_type bcm47xx_bus_type;
+ 
+-void bcm47xx_fill_sprom(struct ssb_sprom *sprom, const char *prefix);
+-void bcm47xx_fill_sprom_ethernet(struct ssb_sprom *sprom, const char *prefix);
++void bcm47xx_fill_sprom(struct ssb_sprom *sprom, const char *prefix,
++			bool fallback);
+ 
+ #ifdef CONFIG_BCM47XX_SSB
+ void bcm47xx_fill_ssb_boardinfo(struct ssb_boardinfo *boardinfo,
diff --git a/target/linux/brcm47xx/patches-3.3/400-arch-bcm47xx.patch b/target/linux/brcm47xx/patches-3.3/400-arch-bcm47xx.patch
index 4018fd8d2b..784562dc74 100644
--- a/target/linux/brcm47xx/patches-3.3/400-arch-bcm47xx.patch
+++ b/target/linux/brcm47xx/patches-3.3/400-arch-bcm47xx.patch
@@ -33,7 +33,7 @@
 +EXPORT_SYMBOL(nvram_get);
 --- a/arch/mips/bcm47xx/setup.c
 +++ b/arch/mips/bcm47xx/setup.c
-@@ -380,3 +380,20 @@ static int __init bcm47xx_register_flash
+@@ -381,3 +381,20 @@ static int __init bcm47xx_register_flash
  	return -1;
  }
  fs_initcall(bcm47xx_register_flash);
diff --git a/target/linux/brcm47xx/patches-3.3/502-bcm47xx-rewrite-gpio-handling.patch b/target/linux/brcm47xx/patches-3.3/502-bcm47xx-rewrite-gpio-handling.patch
index cafd65a0cf..2f62728d6e 100644
--- a/target/linux/brcm47xx/patches-3.3/502-bcm47xx-rewrite-gpio-handling.patch
+++ b/target/linux/brcm47xx/patches-3.3/502-bcm47xx-rewrite-gpio-handling.patch
@@ -276,7 +276,7 @@
 +EXPORT_SYMBOL(gpio_set_value);
 --- a/arch/mips/bcm47xx/setup.c
 +++ b/arch/mips/bcm47xx/setup.c
-@@ -345,6 +345,8 @@ void __init plat_mem_setup(void)
+@@ -346,6 +346,8 @@ void __init plat_mem_setup(void)
  	_machine_restart = bcm47xx_machine_restart;
  	_machine_halt = bcm47xx_machine_halt;
  	pm_power_off = bcm47xx_machine_halt;