u-boot git: updated calamari SRCREV, add new functionality

Ths commit is for calamari (MPC8636DS) only.
It moves to the head of the mpc85xx git
I also added several patches.
These provide additional functionality w.r.t. expression handling,
As they are not calamari specific I've put them in the u-boot-git directory.
I did not want to apply them right away as I am not sure if they apply to all the various
SRCREVs that are build with this recipe and I did want to break someone else's u-boot.
The patches are also submitted upstream

Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>

8 files changed, 528 insertions, 0 deletions

diff --git a/recipes/u-boot/u-boot-git/0001-cmd_i2c.c-reduced-subaddress-length-to-3-bytes.patch b/recipes/u-boot/u-boot-git/0001-cmd_i2c.c-reduced-subaddress-length-to-3-bytes.patch
new file mode 100644
index 0000000000..afaee11c5d
--- /dev/null
+++ b/recipes/u-boot/u-boot-git/0001-cmd_i2c.c-reduced-subaddress-length-to-3-bytes.patch
@@ -0,0 +1,66 @@
+From 609d8536cd125793fe52b393e854dd7df238c954 Mon Sep 17 00:00:00 2001
+From: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+Date: Wed, 24 Feb 2010 09:23:00 +0100
+Subject: [PATCH 1/5] cmd_i2c.c: reduced subaddress length to 3 bytes
+
+according to some of the comments the subaddress length is 1 or 2, but we are being
+prepared for the case it becomes 3. However the code also accepted 4.
+This repairs this by changing the constand 4 to 3.
+
+Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+---
+ common/cmd_i2c.c |   10 +++++-----
+ 1 files changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c
+index 62cbd33..7531702 100644
+--- a/common/cmd_i2c.c
++++ b/common/cmd_i2c.c
+@@ -193,7 +193,7 @@ int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+ 		for (j = 0; j < 8; j++) {
+ 			if (argv[2][j] == '.') {
+ 				alen = argv[2][j+1] - '0';
+-				if (alen > 4) {
++				if (alen > 3) {
+ 					cmd_usage(cmdtp);
+ 					return 1;
+ 				}
+@@ -287,7 +287,7 @@ int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+ 	for (j = 0; j < 8; j++) {
+ 		if (argv[2][j] == '.') {
+ 			alen = argv[2][j+1] - '0';
+-			if (alen > 4) {
++			if (alen > 3) {
+ 				cmd_usage(cmdtp);
+ 				return 1;
+ 			}
+@@ -361,7 +361,7 @@ int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+ 	for (j = 0; j < 8; j++) {
+ 		if (argv[2][j] == '.') {
+ 			alen = argv[2][j+1] - '0';
+-			if (alen > 4) {
++			if (alen > 3) {
+ 				cmd_usage(cmdtp);
+ 				return 1;
+ 			}
+@@ -451,7 +451,7 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
+ 		for (j = 0; j < 8; j++) {
+ 			if (argv[2][j] == '.') {
+ 				alen = argv[2][j+1] - '0';
+-				if (alen > 4) {
++				if (alen > 3) {
+ 					cmd_usage(cmdtp);
+ 					return 1;
+ 				}
+@@ -607,7 +607,7 @@ int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+ 	for (j = 0; j < 8; j++) {
+ 		if (argv[2][j] == '.') {
+ 			alen = argv[2][j+1] - '0';
+-			if (alen > 4) {
++			if (alen > 3) {
+ 				cmd_usage(cmdtp);
+ 				return 1;
+ 			}
+-- 
+1.7.0
+
diff --git a/recipes/u-boot/u-boot-git/0002-cmd_bootm.c-made-subcommand-array-static.patch b/recipes/u-boot/u-boot-git/0002-cmd_bootm.c-made-subcommand-array-static.patch
new file mode 100644
index 0000000000..9bf471e347
--- /dev/null
+++ b/recipes/u-boot/u-boot-git/0002-cmd_bootm.c-made-subcommand-array-static.patch
@@ -0,0 +1,26 @@
+From bdf849874fdb53e9b58adedec3bb54e19d06792c Mon Sep 17 00:00:00 2001
+From: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+Date: Wed, 24 Feb 2010 10:28:34 +0100
+Subject: [PATCH 2/5] cmd_bootm.c: made subcommand array static
+
+Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+---
+ common/cmd_bootm.c |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
+index 23ab0c4..827d542 100644
+--- a/common/cmd_bootm.c
++++ b/common/cmd_bootm.c
+@@ -462,7 +462,7 @@ static int bootm_start_standalone(ulong iflag, int argc, char *argv[])
+ 
+ /* we overload the cmd field with our state machine info instead of a
+  * function pointer */
+-cmd_tbl_t cmd_bootm_sub[] = {
++static cmd_tbl_t cmd_bootm_sub[] = {
+ 	U_BOOT_CMD_MKENT(start, 0, 1, (void *)BOOTM_STATE_START, "", ""),
+ 	U_BOOT_CMD_MKENT(loados, 0, 1, (void *)BOOTM_STATE_LOADOS, "", ""),
+ #if defined(CONFIG_PPC) || defined(CONFIG_M68K) || defined(CONFIG_SPARC)
+-- 
+1.7.0
+
diff --git a/recipes/u-boot/u-boot-git/0002-cmd_itest.c-fix-pointer-dereferencing.patch b/recipes/u-boot/u-boot-git/0002-cmd_itest.c-fix-pointer-dereferencing.patch
new file mode 100644
index 0000000000..1b423b9195
--- /dev/null
+++ b/recipes/u-boot/u-boot-git/0002-cmd_itest.c-fix-pointer-dereferencing.patch
@@ -0,0 +1,40 @@
+Subject: [PATCH 2/2] cmd_itest.c: fix pointer dereferencing
+Date: Mon, 22 Feb 2010 22:49:06 +0100
+Message-Id: <1266875346-17025-1-git-send-email-fransmeulenbroeks@gmail.com>
+X-Mailer: git-send-email 1.6.4.2
+
+fix pointer dereferencing
+if the size is .b and .w an 8 or 16 bit access is done.
+
+Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+---
+ common/cmd_itest.c |    9 +++++++--
+ 1 files changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/common/cmd_itest.c b/common/cmd_itest.c
+index 5b301bf..58c5e7b 100644
+--- a/common/cmd_itest.c
++++ b/common/cmd_itest.c
+@@ -66,12 +66,17 @@ op_tbl_t op_table [] = {
+ 
+ static long evalexp(char *s, int w)
+ {
+-	long l, *p;
++	long l = 0;
++	long *p;
+ 
+ 	/* if the parameter starts with a * then assume is a pointer to the value we want */
+ 	if (s[0] == '*') {
+ 		p = (long *)simple_strtoul(&s[1], NULL, 16);
+-		l = *p;
++		switch (w) {
++		case 1: return((long)(*(unsigned char *)p));
++		case 2: return((long)(*(unsigned short *)p));
++		case 4: return(*p);
++		}
+ 	} else {
+ 		l = simple_strtoul(s, NULL, 16);
+ 	}
+-- 
+1.6.4.2
+
diff --git a/recipes/u-boot/u-boot-git/0003-cmd_i2c.c-reworked-subcommand-handling.patch b/recipes/u-boot/u-boot-git/0003-cmd_i2c.c-reworked-subcommand-handling.patch
new file mode 100644
index 0000000000..d681bc2a98
--- /dev/null
+++ b/recipes/u-boot/u-boot-git/0003-cmd_i2c.c-reworked-subcommand-handling.patch
@@ -0,0 +1,109 @@
+From 75ed15eae925d6e9c8078c8fb013d344d7f3d50f Mon Sep 17 00:00:00 2001
+From: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+Date: Wed, 24 Feb 2010 12:24:34 +0100
+Subject: [PATCH 3/5] cmd_i2c.c: reworked subcommand handling
+
+Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+---
+ common/cmd_i2c.c |   77 +++++++++++++++++++++++++++++++----------------------
+ 1 files changed, 45 insertions(+), 32 deletions(-)
+
+diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c
+index 7531702..e54fc20 100644
+--- a/common/cmd_i2c.c
++++ b/common/cmd_i2c.c
+@@ -1242,46 +1242,59 @@ int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+ 	return ret;
+ }
+ 
+-int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
++int do_i2c_mm(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+ {
+-	/* Strip off leading 'i2c' command argument */
+-	argc--;
+-	argv++;
++	return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
++}
++
++int do_i2c_nm(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
++{
++	return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
++}
+ 
++int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
++{
++	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
++	return 0;
++}
++
++static cmd_tbl_t cmd_i2c_sub[] = {
+ #if defined(CONFIG_I2C_MUX)
+-	if (!strncmp(argv[0], "bu", 2))
+-		return do_i2c_add_bus(cmdtp, flag, argc, argv);
++	U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_add_bus, "", ""),
+ #endif  /* CONFIG_I2C_MUX */
+-	if (!strncmp(argv[0], "sp", 2))
+-		return do_i2c_bus_speed(cmdtp, flag, argc, argv);
++	U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
+ #if defined(CONFIG_I2C_MULTI_BUS)
+-	if (!strncmp(argv[0], "de", 2))
+-		return do_i2c_bus_num(cmdtp, flag, argc, argv);
++	U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
+ #endif  /* CONFIG_I2C_MULTI_BUS */
+-	if (!strncmp(argv[0], "md", 2))
+-		return do_i2c_md(cmdtp, flag, argc, argv);
+-	if (!strncmp(argv[0], "mm", 2))
+-		return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
+-	if (!strncmp(argv[0], "mw", 2))
+-		return do_i2c_mw(cmdtp, flag, argc, argv);
+-	if (!strncmp(argv[0], "nm", 2))
+-		return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
+-	if (!strncmp(argv[0], "cr", 2))
+-		return do_i2c_crc(cmdtp, flag, argc, argv);
+-	if (!strncmp(argv[0], "pr", 2))
+-		return do_i2c_probe(cmdtp, flag, argc, argv);
+-	if (!strncmp(argv[0], "re", 2)) {
+-		i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+-		return 0;
+-	}
+-	if (!strncmp(argv[0], "lo", 2))
+-		return do_i2c_loop(cmdtp, flag, argc, argv);
++	U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
++	U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
++	U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
++	U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
++	U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
++	U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
++	U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
+ #if defined(CONFIG_CMD_SDRAM)
+-	if (!strncmp(argv[0], "sd", 2))
+-		return do_sdram(cmdtp, flag, argc, argv);
++	U_BOOT_CMD_MKENT(sdram, 1, 1, do_i2c_sdram, "", ""),
+ #endif
+-	cmd_usage(cmdtp);
+-	return 0;
++	U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
++};
++
++int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
++{
++	cmd_tbl_t *c;
++
++	/* Strip off leading 'i2c' command argument */
++	argc--;
++	argv++;
++
++	c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));
++
++	if (c) {
++		return  c->cmd(cmdtp, flag, argc, argv);
++	} else {
++		cmd_usage(cmdtp);
++		return 1;
++	}
+ }
+ 
+ /***************************************************/
+-- 
+1.7.0
+
diff --git a/recipes/u-boot/u-boot-git/0004-cmd_i2c.c-sorted-commands-alphabetically.patch b/recipes/u-boot/u-boot-git/0004-cmd_i2c.c-sorted-commands-alphabetically.patch
new file mode 100644
index 0000000000..b433d6a582
--- /dev/null
+++ b/recipes/u-boot/u-boot-git/0004-cmd_i2c.c-sorted-commands-alphabetically.patch
@@ -0,0 +1,48 @@
+From 5ed358a930d5bb79510dadf4e22b8ed9f972f454 Mon Sep 17 00:00:00 2001
+From: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+Date: Thu, 25 Feb 2010 09:58:24 +0100
+Subject: [PATCH 4/5] cmd_i2c.c: sorted commands alphabetically
+
+Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+---
+ common/cmd_i2c.c |   11 +++++------
+ 1 files changed, 5 insertions(+), 6 deletions(-)
+
+diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c
+index e54fc20..b51e3f4 100644
+--- a/common/cmd_i2c.c
++++ b/common/cmd_i2c.c
+@@ -1302,25 +1302,24 @@ int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+ U_BOOT_CMD(
+ 	i2c, 6, 1, do_i2c,
+ 	"I2C sub-system",
+-	"speed [speed] - show or set I2C bus speed\n"
+ #if defined(CONFIG_I2C_MUX)
+-	"i2c bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\n"
++	"bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\ni2c "
+ #endif  /* CONFIG_I2C_MUX */
++	"crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
+ #if defined(CONFIG_I2C_MULTI_BUS)
+ 	"i2c dev [dev] - show or set current I2C bus\n"
+ #endif  /* CONFIG_I2C_MULTI_BUS */
++	"i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
+ 	"i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
+ 	"i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
+ 	"i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
+ 	"i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
+-	"i2c crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
+ 	"i2c probe - show devices on the I2C bus\n"
+ 	"i2c reset - re-init the I2C Controller\n"
+-	"i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device"
+ #if defined(CONFIG_CMD_SDRAM)
+-	"\n"
+-	"i2c sdram chip - print SDRAM configuration information"
++	"i2c sdram chip - print SDRAM configuration information\n"
+ #endif
++	"i2c speed [speed] - show or set I2C bus speed"
+ );
+ 
+ #if defined(CONFIG_I2C_MUX)
+-- 
+1.7.0
+
diff --git a/recipes/u-boot/u-boot-git/0005-cmd_i2c.c-added-i2c-read-to-memory-function.patch b/recipes/u-boot/u-boot-git/0005-cmd_i2c.c-added-i2c-read-to-memory-function.patch
new file mode 100644
index 0000000000..01d88548f5
--- /dev/null
+++ b/recipes/u-boot/u-boot-git/0005-cmd_i2c.c-added-i2c-read-to-memory-function.patch
@@ -0,0 +1,107 @@
+From cac3d6cd05cc89a4c1495f7198218ef2ae8088ec Mon Sep 17 00:00:00 2001
+From: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+Date: Thu, 25 Feb 2010 10:05:37 +0100
+Subject: [PATCH 5/5] cmd_i2c.c: added i2c read to memory function
+
+Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+---
+ common/cmd_i2c.c |   62 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
+ 1 files changed, 60 insertions(+), 2 deletions(-)
+
+diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c
+index b51e3f4..9e7143a 100644
+--- a/common/cmd_i2c.c
++++ b/common/cmd_i2c.c
+@@ -154,6 +154,63 @@ int i2c_set_bus_speed(unsigned int)
+  */
+ #define DISP_LINE_LEN	16
+ 
++/*
++ * Syntax:
++ *	i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
++ */
++
++int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
++{
++	u_char	chip;
++	uint	devaddr, alen, length;
++	u_char  *memaddr;
++	int	j;
++
++	if (argc != 5) {
++		cmd_usage(cmdtp);
++		return 1;
++	}
++
++	/*
++	 * I2C chip address
++	 */
++	chip = simple_strtoul(argv[1], NULL, 16);
++
++	/*
++	 * I2C data address within the chip.  This can be 1 or
++	 * 2 bytes long.  Some day it might be 3 bytes long :-).
++	 */
++	devaddr = simple_strtoul(argv[2], NULL, 16);
++	alen = 1;
++	for (j = 0; j < 8; j++) {
++		if (argv[2][j] == '.') {
++			alen = argv[2][j+1] - '0';
++			if (alen > 3) {
++				cmd_usage(cmdtp);
++				return 1;
++			}
++			break;
++		} else if (argv[2][j] == '\0')
++			break;
++	}
++
++	/*
++	 * Length is the number of objects, not number of bytes.
++	 */
++	length = simple_strtoul(argv[3], NULL, 16);
++
++	/*
++	 * memaddr is the address where to store things in memory
++	 */
++	memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);
++
++	if (i2c_read(chip, devaddr, alen, memaddr, length) != 0) {
++		puts ("Error reading the chip.\n");
++		return 1;
++	}
++	return 0;
++}
++
+ int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+ {
+ 	u_char	chip;
+@@ -1272,6 +1329,7 @@ static cmd_tbl_t cmd_i2c_sub[] = {
+ 	U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
+ 	U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
+ 	U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
++	U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
+ 	U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
+ #if defined(CONFIG_CMD_SDRAM)
+ 	U_BOOT_CMD_MKENT(sdram, 1, 1, do_i2c_sdram, "", ""),
+@@ -1315,6 +1373,7 @@ U_BOOT_CMD(
+ 	"i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
+ 	"i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
+ 	"i2c probe - show devices on the I2C bus\n"
++	"i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
+ 	"i2c reset - re-init the I2C Controller\n"
+ #if defined(CONFIG_CMD_SDRAM)
+ 	"i2c sdram chip - print SDRAM configuration information\n"
+@@ -1322,8 +1381,7 @@ U_BOOT_CMD(
+ 	"i2c speed [speed] - show or set I2C bus speed"
+ );
+ 
+-#if defined(CONFIG_I2C_MUX)
+-
++#if defined(CONFIG_I2C_MUX) 
+ int i2c_mux_add_device(I2C_MUX_DEVICE *dev)
+ {
+ 	I2C_MUX_DEVICE	*devtmp = i2c_mux_devices;
+-- 
+1.7.0
+
diff --git a/recipes/u-boot/u-boot-git/0006-cmd_itest.c-also-support-environment-variables-as-a.patch b/recipes/u-boot/u-boot-git/0006-cmd_itest.c-also-support-environment-variables-as-a.patch
new file mode 100644
index 0000000000..fc77736f8a
--- /dev/null
+++ b/recipes/u-boot/u-boot-git/0006-cmd_itest.c-also-support-environment-variables-as-a.patch
@@ -0,0 +1,39 @@
+From 11e8b9d3df819406049b36bed2f3fcf43ddd7f12 Mon Sep 17 00:00:00 2001
+From: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+Date: Wed, 24 Feb 2010 15:33:29 +0100
+Subject: [PATCH] cmd_itest.c: also support environment variables as arguments
+
+Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+---
+ common/cmd_itest.c |    8 ++++++++
+ 1 files changed, 8 insertions(+), 0 deletions(-)
+
+diff --git a/common/cmd_itest.c b/common/cmd_itest.c
+index 58c5e7b..78a4082 100644
+--- a/common/cmd_itest.c
++++ b/common/cmd_itest.c
+@@ -69,6 +69,10 @@ static long evalexp(char *s, int w)
+ 	long l = 0;
+ 	long *p;
+ 
++	/* if the parameter starts with a $ replace it with the environment value */
++	if (s[0] == '$') {
++		s = getenv(&s[1]);
++	}
+ 	/* if the parameter starts with a * then assume is a pointer to the value we want */
+ 	if (s[0] == '*') {
+ 		p = (long *)simple_strtoul(&s[1], NULL, 16);
+@@ -86,6 +90,10 @@ static long evalexp(char *s, int w)
+ 
+ static char * evalstr(char *s)
+ {
++	/* if the parameter starts with a $ replace it with the environment value */
++	if (s[0] == '$') {
++		s = getenv(&s[1]);
++	}
+ 	/* if the parameter starts with a * then assume a string pointer else its a literal */
+ 	if (s[0] == '*') {
+ 		return (char *)simple_strtoul(&s[1], NULL, 16);
+-- 
+1.5.4.3
+
diff --git a/recipes/u-boot/u-boot-git/0007-cmd_setexpr-allow-memory-addresses-and-env-vars-in-e.patch b/recipes/u-boot/u-boot-git/0007-cmd_setexpr-allow-memory-addresses-and-env-vars-in-e.patch
new file mode 100644
index 0000000000..10fc4735a2
--- /dev/null
+++ b/recipes/u-boot/u-boot-git/0007-cmd_setexpr-allow-memory-addresses-and-env-vars-in-e.patch
@@ -0,0 +1,93 @@
+From 0d685fe90ab92ccb9f15b7d79b1063f5b79b2dd5 Mon Sep 17 00:00:00 2001
+From: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+Date: Thu, 25 Feb 2010 11:05:31 +0100
+Subject: [PATCH 7/7] cmd_setexpr: allow memory addresses and env vars in expressions
+
+This patch add functionality to use memory addresses and environment variables in
+expressions. This increases the power of expressions substantially
+
+It adheres to the standard convemtions: memory addresses can be given in the format
+*address (e.g. *1000), environment variables as $this_var.
+environment variables are not processed recursively but can contain both constants
+and memory addresses.
+
+Rationale for this change is that it allows masking off bits from a byte that is
+obtained by reading data from e.g. i2c.
+
+Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
+
+---
+
+If recursive environment vars is desired: this can be added easily by changing the
+if statement into a while statement.
+I figured that would be somewhat over the top though (and, unless you take
+special precautions you can run into an endless loop if an env var contains
+its own name.
+If it is desired, please let me know and I happily will add it.
+---
+ common/cmd_setexpr.c |   31 ++++++++++++++++++++++++++++---
+ 1 files changed, 28 insertions(+), 3 deletions(-)
+
+diff --git a/common/cmd_setexpr.c b/common/cmd_setexpr.c
+index f8b5d4d..a7c6f53 100644
+--- a/common/cmd_setexpr.c
++++ b/common/cmd_setexpr.c
+@@ -28,10 +28,32 @@
+ #include <config.h>
+ #include <command.h>
+ 
++static ulong get_arg(char *s, int w)
++{
++	ulong *p;
++
++	/* if the parameter starts with a $ replace it with the environment value */
++	if (s[0] == '$') {
++		s = getenv(&s[1]);
++	}
++	/* if the parameter starts with a * then assume is a pointer to the value we want */
++	if (s[0] == '*') {
++		p = (ulong *)simple_strtoul(&s[1], NULL, 16);
++		switch (w) {
++		case 1: return((ulong)(*(uchar *)p));
++		case 2: return((ulong)(*(ushort *)p));
++		case 4: return(*p);
++		}
++	} else {
++		return simple_strtoul(s, NULL, 16);
++	}
++}
++
+ int do_setexpr(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+ {
+ 	ulong a, b;
+ 	char buf[16];
++	int w;
+ 
+ 	/* Validate arguments */
+ 	if ((argc != 5) || (strlen(argv[3]) != 1)) {
+@@ -39,8 +61,10 @@ int do_setexpr(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+ 		return 1;
+ 	}
+ 
+-	a = simple_strtoul(argv[2], NULL, 16);
+-	b = simple_strtoul(argv[4], NULL, 16);
++	w = cmd_get_data_size(argv[0], 4);
++
++	a = get_arg(argv[2], w);
++	b = get_arg(argv[4], w);
+ 
+ 	switch (argv[3][0]) {
+ 	case '|': sprintf(buf, "%lx", (a | b)); break;
+@@ -64,7 +88,8 @@ int do_setexpr(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+ U_BOOT_CMD(
+ 	setexpr, 5, 0, do_setexpr,
+ 	"set environment variable as the result of eval expression",
+-	"name value1 <op> value2\n"
++	"[.b, .w, .l] name value1 <op> value2\n"
+ 	"    - set environment variable 'name' to the result of the evaluated\n"
+ 	"      express specified by <op>.  <op> can be &, |, ^, +, -, *, /, %"
++	"      size argument is only meaningful if value1 and/or value2 are memory addresses"
+ );
+-- 
+1.7.0
+