SPEAr: Place ethaddr write and read within CONFIG_CMD_NET

ethaddr can be optionally read from i2c memory. So, chip_config command supports
reading/writing hw mac id into i2c memory. Placing this code within
CONFIG_CMD_NET as this would only be needed when network interface is configured

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>

board/spear/common/spr_misc.c

@@ -36,6 +36,10 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if defined(CONFIG_CMD_NET)
+static int i2c_read_mac(uchar *buffer);
+#endif
+
 int dram_init(void)
 {
 	/* Store complete RAM size and return */
@@ -136,6 +140,7 @@ int spear_board_init(ulong mach_type)
 	return 0;
 }
 
+#if defined(CONFIG_CMD_NET)
 static int i2c_read_mac(uchar *buffer)
 {
 	u8 buf[2];
@@ -172,17 +177,18 @@ static int write_mac(uchar *mac)
 		return 0;
 	}
 
-	puts("I2C EEPROM writing failed \n");
+	puts("I2C EEPROM writing failed\n");
 	return -1;
 }
+#endif
 
 int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	void (*sram_setfreq) (unsigned int, unsigned int);
+	unsigned int frequency;
+#if defined(CONFIG_CMD_NET)
 	unsigned char mac[6];
-	unsigned int reg, frequency;
-	char *s, *e;
-	char i2c_mac[20];
+#endif
 
 	if ((argc > 3) || (argc < 2))
 		return cmd_usage(cmdtp);
@@ -207,9 +213,12 @@ int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		}
 
 		return 0;
+
+#if defined(CONFIG_CMD_NET)
 	} else if (!strcmp(argv[1], "ethaddr")) {
 
-		s = argv[2];
+		u32 reg;
+		char *e, *s = argv[2];
 		for (reg = 0; reg < 6; ++reg) {
 			mac[reg] = s ? simple_strtoul(s, &e, 16) : 0;
 			if (s)
@@ -218,14 +227,15 @@ int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		write_mac(mac);
 
 		return 0;
+#endif
 	} else if (!strcmp(argv[1], "print")) {
+#if defined(CONFIG_CMD_NET)
 		if (!i2c_read_mac(mac)) {
-			sprintf(i2c_mac, "%pM", mac);
-			printf("Ethaddr (from i2c mem) = %s\n", i2c_mac);
+			printf("Ethaddr (from i2c mem) = %pM\n", mac);
 		} else {
 			printf("Ethaddr (from i2c mem) = Not set\n");
 		}
-
+#endif
 		return 0;
 	}
 
@@ -235,4 +245,7 @@ int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 U_BOOT_CMD(chip_config, 3, 1, do_chip_config,
 	   "configure chip",
 	   "chip_config cpufreq/ddrfreq frequency\n"
+#if defined(CONFIG_CMD_NET)
+	   "chip_config ethaddr XX:XX:XX:XX:XX:XX\n"
+#endif
 	   "chip_config print");

doc/README.spear

@@ -46,3 +46,11 @@ Further options
 	make FLASH=PNOR (supported by SPEAr310 and SPEAr320)
 	- This option generates a uboot image that supports emi controller for
 	CFI compliant parallel NOR flash
+
+Mac id storage and retrieval in spear platforms
+
+Please read doc/README.enetaddr for the implementation guidelines for mac id
+usage. Basically, environment has precedence over board specific storage. The
+ethaddr beeing used for the network interface is always taken only from
+environment variables. Although, we can check the mac id programmed in i2c
+memory by using chip_config command