diff mbox

[U-Boot,RFC] I2C: change CONFIG_SYS_SPD_BUS_NUM to CONFIG_I2C_DEFAULT_BUS_NUM

Message ID 1300135645-21544-1-git-send-email-msm@freescale.com
State Not Applicable
Headers show

Commit Message

Matthew McClintock March 14, 2011, 8:47 p.m. UTC 
The bus that the i2c api can access before relocating from flash
is defined via CONFIG_SYS_SPD_BUS_NUM, however we want to use
the i2c bus before relocating from flash for non-SPD related
reasons. Therefore, we rename this define to something more
appropriate
---

We are trying to access the I2C bus before relocation from flash to read
switch settings. Using the current CONFIG_SYS_SPD_BUS_NUM define to do this
is fine for our needs however I would like to ask if we wanted to change
this to a new more generic define CONFIG_I2C_DEFAULT_BUS_NUM

 README                                    |    4 ++--
 arch/powerpc/cpu/mpc5xxx/i2c.c            |    2 +-
 arch/powerpc/cpu/ppc4xx/44x_spd_ddr2.c    |    2 +-
 arch/powerpc/cpu/ppc4xx/denali_spd_ddr2.c |    2 +-
 board/freescale/common/sys_eeprom.c       |    8 ++++----
 drivers/i2c/fsl_i2c.c                     |    6 +++---
 drivers/i2c/ppc4xx_i2c.c                  |    8 ++++----
 include/configs/DU440.h                   |    2 +-
 include/configs/MPC8349ITX.h              |    2 +-
 include/configs/MPC8536DS.h               |    2 +-
 include/configs/MPC8572DS.h               |    2 +-
 include/configs/P1022DS.h                 |    2 +-
 include/configs/P2020DS.h                 |    2 +-
 include/configs/corenet_ds.h              |    2 +-
 include/configs/hcu4.h                    |    2 +-
 include/configs/hcu5.h                    |    2 +-
 include/configs/icon.h                    |    2 +-
 include/configs/katmai.h                  |    2 +-
 include/configs/mcu25.h                   |    2 +-
 include/configs/sbc8349.h                 |    2 +-
 include/configs/vme8349.h                 |    2 +-
 include/i2c.h                             |    4 ++--
 22 files changed, 32 insertions(+), 32 deletions(-)

Comments

Wolfgang Denk March 14, 2011, 11:28 p.m. UTC | #1 
Dear Matthew McClintock,

In message <1300135645-21544-1-git-send-email-msm@freescale.com> you wrote:
> The bus that the i2c api can access before relocating from flash
> is defined via CONFIG_SYS_SPD_BUS_NUM, however we want to use
> the i2c bus before relocating from flash for non-SPD related
> reasons. Therefore, we rename this define to something more
> appropriate
> ---
> 
> We are trying to access the I2C bus before relocation from flash to read
> switch settings. Using the current CONFIG_SYS_SPD_BUS_NUM define to do this
> is fine for our needs however I would like to ask if we wanted to change
> this to a new more generic define CONFIG_I2C_DEFAULT_BUS_NUM

Well, obviously you need to update the documentation, too:

> -		CONFIG_SYS_SPD_BUS_NUM
> +		CONFIG_I2C_DEFAULT_BUS_NUM
>  
>  		If defined, then this indicates the I2C bus number for DDR SPD.
>  		If not defined, then U-Boot assumes that SPD is on I2C bus 0.

"bus number for DDR SPD" is not really correct any more?

> @@ -2834,7 +2834,7 @@ Low Level (hardware related) configuration options:
>    SPD_EEPROM_ADDRESS
>  		I2C address of the SPD EEPROM
>  
> -- CONFIG_SYS_SPD_BUS_NUM
> +- CONFIG_I2C_DEFAULT_BUS_NUM
>  		If SPD EEPROM is on an I2C bus other than the first
>  		one, specify here. Note that the value must resolve
>  		to something your driver can deal with.

"SPD EEPROM" is not correct either...

> --- a/board/freescale/common/sys_eeprom.c
> +++ b/board/freescale/common/sys_eeprom.c
> @@ -495,11 +495,11 @@ int mac_read_from_eeprom(void)
>   * This function is called before relocation, so we need to read a private
>   * copy of the EEPROM into a local variable on the stack.
>   *
> - * Also, we assume that CONFIG_SYS_EEPROM_BUS_NUM == CONFIG_SYS_SPD_BUS_NUM.  The global
> - * variable i2c_bus_num must be compile-time initialized to CONFIG_SYS_SPD_BUS_NUM,
> + * Also, we assume that CONFIG_SYS_EEPROM_BUS_NUM == CONFIG_I2C_DEFAULT_BUS_NUM.  The global
> + * variable i2c_bus_num must be compile-time initialized to CONFIG_I2C_DEFAULT_BUS_NUM,
>   * so that the SPD code will work.  This means that all pre-relocation I2C
> - * operations can only occur on the CONFIG_SYS_SPD_BUS_NUM bus.  So if
> - * CONFIG_SYS_EEPROM_BUS_NUM != CONFIG_SYS_SPD_BUS_NUM, then we can't read the EEPROM when
> + * operations can only occur on the CONFIG_I2C_DEFAULT_BUS_NUM bus.  So if
> + * CONFIG_SYS_EEPROM_BUS_NUM != CONFIG_I2C_DEFAULT_BUS_NUM, then we can't read the EEPROM when
>   * this function is called.  Oh well.

Lines too long.


> -static unsigned int i2c_bus_num __attribute__ ((section (".data"))) = CONFIG_SYS_SPD_BUS_NUM;
> +static unsigned int i2c_bus_num __attribute__ ((section (".data"))) = CONFIG_I2C_DEFAULT_BUS_NUM;

Ditto.


Best regards,

Wolfgang Denk
McClintock Matthew-B29882 March 14, 2011, 11:49 p.m. UTC | #2 
On Mon, Mar 14, 2011 at 6:28 PM, Wolfgang Denk <wd@denx.de> wrote:
>> We are trying to access the I2C bus before relocation from flash to read
>> switch settings. Using the current CONFIG_SYS_SPD_BUS_NUM define to do this
>> is fine for our needs however I would like to ask if we wanted to change
>> this to a new more generic define CONFIG_I2C_DEFAULT_BUS_NUM
>
> Well, obviously you need to update the documentation, too:
>

Will be more thorough and fix-up everything and submit a non-RFC patch.

-M
diff mbox

Patch

diff --git a/README b/README
index 21cd71b..4284809 100644
--- a/README
+++ b/README
@@ -1576,7 +1576,7 @@  The following options need to be configured:
 
 		will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1
 
-		CONFIG_SYS_SPD_BUS_NUM
+		CONFIG_I2C_DEFAULT_BUS_NUM
 
 		If defined, then this indicates the I2C bus number for DDR SPD.
 		If not defined, then U-Boot assumes that SPD is on I2C bus 0.
@@ -2834,7 +2834,7 @@  Low Level (hardware related) configuration options:
   SPD_EEPROM_ADDRESS
 		I2C address of the SPD EEPROM
 
-- CONFIG_SYS_SPD_BUS_NUM
+- CONFIG_I2C_DEFAULT_BUS_NUM
 		If SPD EEPROM is on an I2C bus other than the first
 		one, specify here. Note that the value must resolve
 		to something your driver can deal with.
diff --git a/arch/powerpc/cpu/mpc5xxx/i2c.c b/arch/powerpc/cpu/mpc5xxx/i2c.c
index 9fb330f..65fb1f2 100644
--- a/arch/powerpc/cpu/mpc5xxx/i2c.c
+++ b/arch/powerpc/cpu/mpc5xxx/i2c.c
@@ -40,7 +40,7 @@  DECLARE_GLOBAL_DATA_PTR;
 #endif
 #else
 static unsigned int i2c_bus_num __attribute__ ((section (".data"))) =
-						CONFIG_SYS_SPD_BUS_NUM;
+						CONFIG_I2C_DEFAULT_BUS_NUM;
 static unsigned int i2c_bus_speed[2] = {CONFIG_SYS_I2C_SPEED,
 					CONFIG_SYS_I2C_SPEED};
 
diff --git a/arch/powerpc/cpu/ppc4xx/44x_spd_ddr2.c b/arch/powerpc/cpu/ppc4xx/44x_spd_ddr2.c
index 95df1d9..00984cd 100644
--- a/arch/powerpc/cpu/ppc4xx/44x_spd_ddr2.c
+++ b/arch/powerpc/cpu/ppc4xx/44x_spd_ddr2.c
@@ -475,7 +475,7 @@  phys_size_t initdram(int board_type)
 	 */
 
 	/* switch to correct I2C bus */
-	I2C_SET_BUS(CONFIG_SYS_SPD_BUS_NUM);
+	I2C_SET_BUS(CONFIG_I2C_DEFAULT_BUS_NUM);
 	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 
 	/*------------------------------------------------------------------
diff --git a/arch/powerpc/cpu/ppc4xx/denali_spd_ddr2.c b/arch/powerpc/cpu/ppc4xx/denali_spd_ddr2.c
index c35b113..1431056 100644
--- a/arch/powerpc/cpu/ppc4xx/denali_spd_ddr2.c
+++ b/arch/powerpc/cpu/ppc4xx/denali_spd_ddr2.c
@@ -1048,7 +1048,7 @@  phys_size_t initdram(int board_type)
 	 * before continuing.
 	 */
 	/* switch to correct I2C bus */
-	I2C_SET_BUS(CONFIG_SYS_SPD_BUS_NUM);
+	I2C_SET_BUS(CONFIG_I2C_DEFAULT_BUS_NUM);
 	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 
 	/*------------------------------------------------------------------
diff --git a/board/freescale/common/sys_eeprom.c b/board/freescale/common/sys_eeprom.c
index 3ecfb06..2c678d3 100644
--- a/board/freescale/common/sys_eeprom.c
+++ b/board/freescale/common/sys_eeprom.c
@@ -495,11 +495,11 @@  int mac_read_from_eeprom(void)
  * This function is called before relocation, so we need to read a private
  * copy of the EEPROM into a local variable on the stack.
  *
- * Also, we assume that CONFIG_SYS_EEPROM_BUS_NUM == CONFIG_SYS_SPD_BUS_NUM.  The global
- * variable i2c_bus_num must be compile-time initialized to CONFIG_SYS_SPD_BUS_NUM,
+ * Also, we assume that CONFIG_SYS_EEPROM_BUS_NUM == CONFIG_I2C_DEFAULT_BUS_NUM.  The global
+ * variable i2c_bus_num must be compile-time initialized to CONFIG_I2C_DEFAULT_BUS_NUM,
  * so that the SPD code will work.  This means that all pre-relocation I2C
- * operations can only occur on the CONFIG_SYS_SPD_BUS_NUM bus.  So if
- * CONFIG_SYS_EEPROM_BUS_NUM != CONFIG_SYS_SPD_BUS_NUM, then we can't read the EEPROM when
+ * operations can only occur on the CONFIG_I2C_DEFAULT_BUS_NUM bus.  So if
+ * CONFIG_SYS_EEPROM_BUS_NUM != CONFIG_I2C_DEFAULT_BUS_NUM, then we can't read the EEPROM when
  * this function is called.  Oh well.
  */
 unsigned int get_cpu_board_revision(void)
diff --git a/drivers/i2c/fsl_i2c.c b/drivers/i2c/fsl_i2c.c
index cb13dee..e509993 100644
--- a/drivers/i2c/fsl_i2c.c
+++ b/drivers/i2c/fsl_i2c.c
@@ -52,10 +52,10 @@  DECLARE_GLOBAL_DATA_PTR;
  * runs from ROM, and we can't switch buses because we can't modify
  * the global variables.
  */
-#ifndef CONFIG_SYS_SPD_BUS_NUM
-#define CONFIG_SYS_SPD_BUS_NUM 0
+#ifndef CONFIG_I2C_DEFAULT_BUS_NUM
+#define CONFIG_I2C_DEFAULT_BUS_NUM 0
 #endif
-static unsigned int i2c_bus_num __attribute__ ((section (".data"))) = CONFIG_SYS_SPD_BUS_NUM;
+static unsigned int i2c_bus_num __attribute__ ((section (".data"))) = CONFIG_I2C_DEFAULT_BUS_NUM;
 #if defined(CONFIG_I2C_MUX)
 static unsigned int i2c_bus_num_mux __attribute__ ((section ("data"))) = 0;
 #endif
diff --git a/drivers/i2c/ppc4xx_i2c.c b/drivers/i2c/ppc4xx_i2c.c
index c1cbe55..7e43e7a 100644
--- a/drivers/i2c/ppc4xx_i2c.c
+++ b/drivers/i2c/ppc4xx_i2c.c
@@ -43,11 +43,11 @@  DECLARE_GLOBAL_DATA_PTR;
  * runs from ROM, and we can't switch buses because we can't modify
  * the global variables.
  */
-#ifndef CONFIG_SYS_SPD_BUS_NUM
-#define CONFIG_SYS_SPD_BUS_NUM	0
+#ifndef CONFIG_I2C_DEFAULT_BUS_NUM
+#define CONFIG_I2C_DEFAULT_BUS_NUM	0
 #endif
 static unsigned int i2c_bus_num __attribute__ ((section (".data"))) =
-	CONFIG_SYS_SPD_BUS_NUM;
+	CONFIG_I2C_DEFAULT_BUS_NUM;
 #endif /* CONFIG_I2C_MULTI_BUS */
 
 static void _i2c_bus_reset(void)
@@ -166,7 +166,7 @@  void i2c_init(int speed, int slaveaddr)
 	}
 
 	/* set to SPD bus as default bus upon powerup */
-	I2C_SET_BUS(CONFIG_SYS_SPD_BUS_NUM);
+	I2C_SET_BUS(CONFIG_I2C_DEFAULT_BUS_NUM);
 }
 
 /*
diff --git a/include/configs/DU440.h b/include/configs/DU440.h
index ceab604..1bffe8e 100644
--- a/include/configs/DU440.h
+++ b/include/configs/DU440.h
@@ -178,7 +178,7 @@ 
 #define CONFIG_SYS_I2C_SLAVE		0x7F
 #define CONFIG_I2C_MULTI_BUS    1
 
-#define CONFIG_SYS_SPD_BUS_NUM         0
+#define CONFIG_I2C_DEFAULT_BUS_NUM         0
 #define IIC1_MCP3021_ADDR	0x4d
 #define IIC1_USB2507_ADDR	0x2c
 #ifdef CONFIG_I2C_MULTI_BUS
diff --git a/include/configs/MPC8349ITX.h b/include/configs/MPC8349ITX.h
index de233ff..3193c6d 100644
--- a/include/configs/MPC8349ITX.h
+++ b/include/configs/MPC8349ITX.h
@@ -103,7 +103,7 @@ 
 #define CONFIG_I2C_MULTI_BUS
 #define CONFIG_SYS_I2C_OFFSET		0x3000
 #define CONFIG_SYS_I2C2_OFFSET		0x3100
-#define CONFIG_SYS_SPD_BUS_NUM		1	/* The I2C bus for SPD */
+#define CONFIG_I2C_DEFAULT_BUS_NUM		1	/* The I2C bus for SPD */
 #define CONFIG_SYS_RTC_BUS_NUM		1	/* The I2C bus for RTC */
 
 #define CONFIG_SYS_I2C_8574_ADDR1	0x20	/* I2C1, PCF8574 */
diff --git a/include/configs/MPC8536DS.h b/include/configs/MPC8536DS.h
index 13300de..a5f2e79 100644
--- a/include/configs/MPC8536DS.h
+++ b/include/configs/MPC8536DS.h
@@ -163,7 +163,7 @@ 
 
 /* I2C addresses of SPD EEPROMs */
 #define SPD_EEPROM_ADDRESS	0x51	/* CTLR 0 DIMM 0 */
-#define CONFIG_SYS_SPD_BUS_NUM		1
+#define CONFIG_I2C_DEFAULT_BUS_NUM		1
 
 /* These are used when DDR doesn't use SPD. */
 #define CONFIG_SYS_SDRAM_SIZE		256	/* DDR is 256MB */
diff --git a/include/configs/MPC8572DS.h b/include/configs/MPC8572DS.h
index bf2fdd6..b7944da 100644
--- a/include/configs/MPC8572DS.h
+++ b/include/configs/MPC8572DS.h
@@ -148,7 +148,7 @@ 
 #define CONFIG_CHIP_SELECTS_PER_CTRL	2
 
 /* I2C addresses of SPD EEPROMs */
-#define CONFIG_SYS_SPD_BUS_NUM		1	/* SPD EEPROMS locate on I2C bus 1 */
+#define CONFIG_I2C_DEFAULT_BUS_NUM		1	/* SPD EEPROMS locate on I2C bus 1 */
 #define SPD_EEPROM_ADDRESS1	0x51	/* CTLR 0 DIMM 0 */
 #define SPD_EEPROM_ADDRESS2	0x52	/* CTLR 1 DIMM 0 */
 
diff --git a/include/configs/P1022DS.h b/include/configs/P1022DS.h
index cb24041..fab193d 100644
--- a/include/configs/P1022DS.h
+++ b/include/configs/P1022DS.h
@@ -86,7 +86,7 @@ 
 #define CONFIG_CHIP_SELECTS_PER_CTRL	(2 * CONFIG_DIMM_SLOTS_PER_CTLR)
 
 /* I2C addresses of SPD EEPROMs */
-#define CONFIG_SYS_SPD_BUS_NUM		1
+#define CONFIG_I2C_DEFAULT_BUS_NUM		1
 #define SPD_EEPROM_ADDRESS1		0x51	/* CTLR 0 DIMM 0 */
 
 /*
diff --git a/include/configs/P2020DS.h b/include/configs/P2020DS.h
index b32a997..b0eb5ae 100644
--- a/include/configs/P2020DS.h
+++ b/include/configs/P2020DS.h
@@ -127,7 +127,7 @@ 
 
 /* I2C addresses of SPD EEPROMs */
 #define CONFIG_DDR_SPD
-#define CONFIG_SYS_SPD_BUS_NUM		0	/* SPD EEPROM located on I2C bus 0 */
+#define CONFIG_I2C_DEFAULT_BUS_NUM		0	/* SPD EEPROM located on I2C bus 0 */
 #define SPD_EEPROM_ADDRESS1	0x51	/* CTLR 0 DIMM 0 */
 
 /* These are used when DDR doesn't use SPD.  */
diff --git a/include/configs/corenet_ds.h b/include/configs/corenet_ds.h
index bff212e..1c93be0 100644
--- a/include/configs/corenet_ds.h
+++ b/include/configs/corenet_ds.h
@@ -137,7 +137,7 @@ 
 #define CONFIG_DDR_SPD
 #define CONFIG_FSL_DDR3
 
-#define CONFIG_SYS_SPD_BUS_NUM	1
+#define CONFIG_I2C_DEFAULT_BUS_NUM	1
 #define SPD_EEPROM_ADDRESS1	0x51
 #define SPD_EEPROM_ADDRESS2	0x52
 #define CONFIG_SYS_SDRAM_SIZE	4096	/* for fixed parameter use */
diff --git a/include/configs/hcu4.h b/include/configs/hcu4.h
index c56efde..67b98c7 100644
--- a/include/configs/hcu4.h
+++ b/include/configs/hcu4.h
@@ -141,7 +141,7 @@ 
  * I2C stuff for a ATMEL AT24C16 (2kB holding ENV, we are using the
  * the first internal I2C controller of the PPC440EPx
  *----------------------------------------------------------------------*/
-#define CONFIG_SYS_SPD_BUS_NUM		0
+#define CONFIG_I2C_DEFAULT_BUS_NUM		0
 
 #define CONFIG_IPADDR		172.25.1.14
 
diff --git a/include/configs/hcu5.h b/include/configs/hcu5.h
index 0c8fdf5..e7ecbeb 100644
--- a/include/configs/hcu5.h
+++ b/include/configs/hcu5.h
@@ -141,7 +141,7 @@ 
  * I2C stuff for a ATMEL AT24C16 (2kB holding ENV, we are using the
  * the second internal I2C controller of the PPC440EPx
  *----------------------------------------------------------------------*/
-#define CONFIG_SYS_SPD_BUS_NUM	1
+#define CONFIG_I2C_DEFAULT_BUS_NUM	1
 
 /* Setup some board specific values for the default environment variables */
 #define CONFIG_IPADDR		172.25.1.15
diff --git a/include/configs/icon.h b/include/configs/icon.h
index 2fac0ef..ab34fe3 100644
--- a/include/configs/icon.h
+++ b/include/configs/icon.h
@@ -123,7 +123,7 @@ 
 #define CONFIG_SYS_I2C_SPEED	100000	/* I2C speed and slave address	*/
 
 #define CONFIG_I2C_MULTI_BUS
-#define CONFIG_SYS_SPD_BUS_NUM	0	/* The I2C bus for SPD		*/
+#define CONFIG_I2C_DEFAULT_BUS_NUM	0	/* The I2C bus for SPD		*/
 
 #define CONFIG_SYS_I2C_MULTI_EEPROMS
 #define CONFIG_SYS_I2C_EEPROM_ADDR	0x50
diff --git a/include/configs/katmai.h b/include/configs/katmai.h
index 3ed8dc7..dfdc739 100644
--- a/include/configs/katmai.h
+++ b/include/configs/katmai.h
@@ -122,7 +122,7 @@ 
 #define CONFIG_SYS_I2C_SPEED		100000	/* I2C speed and slave address	*/
 
 #define CONFIG_I2C_MULTI_BUS
-#define CONFIG_SYS_SPD_BUS_NUM		0	/* The I2C bus for SPD		*/
+#define CONFIG_I2C_DEFAULT_BUS_NUM		0	/* The I2C bus for SPD		*/
 
 #define IIC0_BOOTPROM_ADDR	0x50
 #define IIC0_ALT_BOOTPROM_ADDR	0x54
diff --git a/include/configs/mcu25.h b/include/configs/mcu25.h
index a162291..73df878 100644
--- a/include/configs/mcu25.h
+++ b/include/configs/mcu25.h
@@ -141,7 +141,7 @@ 
  * I2C stuff for a ATMEL AT24C16 (2kB holding ENV, we are using the
  * the first internal I2C controller of the PPC440EPx
  *----------------------------------------------------------------------*/
-#define CONFIG_SYS_SPD_BUS_NUM		0
+#define CONFIG_I2C_DEFAULT_BUS_NUM		0
 
 /* Setup some board specific values for the default environment variables */
 #define CONFIG_IPADDR		172.25.1.25
diff --git a/include/configs/sbc8349.h b/include/configs/sbc8349.h
index b418cf2..588c500 100644
--- a/include/configs/sbc8349.h
+++ b/include/configs/sbc8349.h
@@ -290,7 +290,7 @@ 
 #define CONFIG_SYS_I2C1_OFFSET		0x3000
 #define CONFIG_SYS_I2C2_OFFSET		0x3100
 #define CONFIG_SYS_I2C_OFFSET		CONFIG_SYS_I2C2_OFFSET
-/* could also use CONFIG_I2C_MULTI_BUS and CONFIG_SYS_SPD_BUS_NUM... */
+/* could also use CONFIG_I2C_MULTI_BUS and CONFIG_I2C_DEFAULT_BUS_NUM... */
 
 /* TSEC */
 #define CONFIG_SYS_TSEC1_OFFSET 0x24000
diff --git a/include/configs/vme8349.h b/include/configs/vme8349.h
index d153762..b400988 100644
--- a/include/configs/vme8349.h
+++ b/include/configs/vme8349.h
@@ -221,7 +221,7 @@ 
 #define CONFIG_SYS_I2C1_OFFSET	0x3000
 #define CONFIG_SYS_I2C2_OFFSET	0x3100
 #define CONFIG_SYS_I2C_OFFSET	CONFIG_SYS_I2C1_OFFSET
-/* could also use CONFIG_I2C_MULTI_BUS and CONFIG_SYS_SPD_BUS_NUM... */
+/* could also use CONFIG_I2C_MULTI_BUS and CONFIG_I2C_DEFAULT_BUS_NUM... */
 
 #define CONFIG_SYS_I2C_8574_ADDR2       0x20    /* I2C1, PCF8574 */
 
diff --git a/include/i2c.h b/include/i2c.h
index cd23c8a..452cffa 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -65,8 +65,8 @@ 
 #if !defined(CONFIG_SYS_DTT_BUS_NUM)
 #define CONFIG_SYS_DTT_BUS_NUM		0
 #endif
-#if !defined(CONFIG_SYS_SPD_BUS_NUM)
-#define CONFIG_SYS_SPD_BUS_NUM		0
+#if !defined(CONFIG_I2C_DEFAULT_BUS_NUM)
+#define CONFIG_I2C_DEFAULT_BUS_NUM		0
 #endif
 
 #ifndef I2C_SOFT_DECLARATIONS