83xx, kmeter1: add I2C, dtt, eeprom support

This patch adds I2C support for the Keymile kmeter1 board.
It uses the First I2C Controller from the CPU, for
accessing 4 temperature sensors, an eeprom with IVM data
and the booteeprom over a pca9547 mux.

Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

board/keymile/common/common.c

@@ -318,7 +318,7 @@ int ivm_read_eeprom (void)
 	if (buf != NULL)
 		dev_addr = simple_strtoul ((char *)buf, NULL, 16);
 
-	if (eeprom_read (dev_addr, 0, i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN) != 0) {
+	if (i2c_read(dev_addr, 0, 1, i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN) != 0) {
 		printf ("Error reading EEprom\n");
 		return -2;
 	}

board/keymile/kmeter1/kmeter1.c

@@ -59,6 +59,23 @@ const qe_iop_conf_t qe_iop_conf_tab[] = {
 	{0,  0, 0, 0, QE_IOP_TAB_END},
 };
 
+static int board_init_i2c_busses (void)
+{
+	I2C_MUX_DEVICE *dev = NULL;
+	uchar	*buf;
+
+	/* Set up the Bus for the DTTs */
+	buf = (unsigned char *) getenv ("dtt_bus");
+	if (buf != NULL)
+		dev = i2c_mux_ident_muxstring (buf);
+	if (dev == NULL) {
+		printf ("Error couldn't add Bus for DTT\n");
+		printf ("please setup dtt_bus to where your\n");
+		printf ("DTT is found.\n");
+	}
+	return 0;
+}
+
 int board_early_init_r (void)
 {
 	void *reg = (void *)(CONFIG_SYS_IMMR + 0x14a8);
@@ -80,6 +97,13 @@ int board_early_init_r (void)
 	return 0;
 }
 
+int misc_init_r (void)
+{
+	/* add board specific i2c busses */
+	board_init_i2c_busses ();
+	return 0;
+}
+
 int fixed_sdram(void)
 {
 	volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
@@ -156,3 +180,12 @@ void ft_board_setup (void *blob, bd_t *bd)
 	ft_cpu_setup (blob, bd);
 }
 #endif
+
+#if defined(CONFIG_HUSH_INIT_VAR)
+extern int ivm_read_eeprom (void);
+int hush_init_var (void)
+{
+	ivm_read_eeprom ();
+	return 0;
+}
+#endif

include/configs/keymile-common.h

@@ -42,13 +42,9 @@
 #define CONFIG_CMD_IMMAP
 #define CONFIG_CMD_MII
 #define CONFIG_CMD_PING
-
-/* should go away, if kmeter I2C support is enabled */
-#if defined(CONFIG_MGCOGE) || defined(CONFIG_MGSUVD)
 #define CONFIG_CMD_DTT
 #define CONFIG_CMD_EEPROM
 #define CONFIG_CMD_I2C
-#endif
 
 #undef	CONFIG_WATCHDOG			/* disable platform specific watchdog */
 
@@ -73,10 +69,7 @@
 #define CONFIG_SYS_BARGSIZE		CONFIG_SYS_CBSIZE	/* Boot Argument Buffer Size  */
 #define CONFIG_CMDLINE_EDITING		1	/* add command line history     */
 
-/* should go away, if kmeter I2C support is enabled */
-#if defined(CONFIG_MGCOGE) || defined(CONFIG_MGSUVD)
 #define CONFIG_HUSH_INIT_VAR	1
-#endif
 
 #define CONFIG_SYS_ALT_MEMTEST		/* memory test, takes time */
 #define CONFIG_SYS_MEMTEST_START	0x00100000	/* memtest works on */

include/configs/kmeter1.h

@@ -32,6 +32,7 @@
 /* include common defines/options for all Keymile boards */
 #include "keymile-common.h"
 
+#define CONFIG_MISC_INIT_R	1
 /*
  * System Clock Setup
  */
@@ -300,6 +301,38 @@
 #define CONFIG_ENV_SIZE		0x2000
 #endif /* CFG_RAMBOOT */
 
+/* I2C */
+#define CONFIG_HARD_I2C		/* I2C with hardware support */
+#undef	CONFIG_SOFT_I2C		/* I2C bit-banged */
+#define CONFIG_FSL_I2C
+#define CONFIG_SYS_I2C_SPEED	200000	/* I2C speed and slave address */
+#define CONFIG_SYS_I2C_SLAVE	0x7F
+#define CONFIG_SYS_I2C_OFFSET	0x3000
+#define CONFIG_I2C_MULTI_BUS	1
+#define CONFIG_I2C_CMD_TREE	1
+#define CONFIG_SYS_MAX_I2C_BUS		2
+#define CONFIG_I2C_MUX		1
+
+/* EEprom support */
+#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN	2
+#define CONFIG_SYS_I2C_MULTI_EEPROMS	1
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_ENABLE
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS 3
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS 10
+
+/* Support the IVM EEprom */
+#define	CONFIG_SYS_IVM_EEPROM_ADR	0x50
+#define CONFIG_SYS_IVM_EEPROM_MAX_LEN	0x400
+#define CONFIG_SYS_IVM_EEPROM_PAGE_LEN	0x100
+
+/* I2C SYSMON (LM75, AD7414 is almost compatible)			*/
+#define CONFIG_DTT_LM75		1	/* ON Semi's LM75		*/
+#define CONFIG_DTT_SENSORS	{0, 1, 2, 3}	/* Sensor addresses		*/
+#define CONFIG_SYS_DTT_MAX_TEMP	70
+#define CONFIG_SYS_DTT_LOW_TEMP	-30
+#define CONFIG_SYS_DTT_HYSTERESIS	3
+#define CONFIG_SYS_DTT_BUS_NUM		(2)
+
 #if defined(CONFIG_PCI)
 #define CONFIG_CMD_PCI
 #endif
@@ -452,6 +485,8 @@
 	"loadfdt=tftp ${fdt_addr_r} ${fdt_file}\0"			\
 	"loadkernel=tftp ${kernel_addr_r} ${boot_file}\0"		\
 	"unlock=yes\0"							\
+	"EEprom_ivm=pca9547:70:9\0"					\
+	"dtt_bus=pca9547:70:a\0"					\
    ""
 
 #endif /* __CONFIG_H */