[U-Boot-Users] External RTC in MPC860P (i2c - rtc DS1307)

[Anand Mallya]

Dear Wolfgang,


>No, this is NOT correct. You must  not  define  the  same  things  in
>several place, and differently. Use a single definition in your board
>config file, and make sure it is correct.

    Now I've taken reference of the TQM866M.h for the I2C RTC and
changed the the "include/configs/BOARD.h" as below:


/* enable I2C and select the hardware/software driver */

#undef  CONFIG_HARD_I2C                 /* I2C with hardware support    
*/
#define CONFIG_SOFT_I2C         1       /* I2C bit-banged               
*/
#define  CONFIG_RTC_DS1307      1
#define CFG_I2C_SPEED           93000   /* 93 kHz is supposed to work   
*/
#define CFG_I2C_SLAVE           0xFE
#ifdef CONFIG_SOFT_I2C
  /*
 *  * Software (bit-bang) I2C driver configuration
 *   */
#define PB_SCL          0x00000020      /* PB 26 */
#define PB_SDA          0x00000010      /* PB 27 */
#define I2C_INIT        (immr->im_cpm.cp_pbdir |=  PB_SCL)
#define I2C_ACTIVE      (immr->im_cpm.cp_pbdir |=  PB_SDA)
#define I2C_TRISTATE    (immr->im_cpm.cp_pbdir &= ~PB_SDA)
#define I2C_READ        ((immr->im_cpm.cp_pbdat & PB_SDA) != 0)
#define I2C_SDA(bit)    if(bit) immr->im_cpm.cp_pbdat |=  PB_SDA; \
                        else    immr->im_cpm.cp_pbdat &= ~PB_SDA
#define I2C_SCL(bit)    if(bit) immr->im_cpm.cp_pbdat |=  PB_SCL; \
                        else    immr->im_cpm.cp_pbdat &= ~PB_SCL
#define I2C_DELAY       udelay(2)       /* 1/4 I2C clock duration */
#endif  /* CONFIG_SOFT_I2C */


All other definitions I've reverted back. But now after the changes 
done
following is what I get:


[ICM] $date
i2c_read: chip 68 addr 00 alen 1 buffer 00f3dbf8 len 1
i2c_read, no chip responded 68
i2c_read: chip 68 addr 01 alen 1 buffer 00f3dbf8 len 1
i2c_read, no chip responded 68
i2c_read: chip 68 addr 02 alen 1 buffer 00f3dbf8 len 1
i2c_read, no chip responded 68
i2c_read: chip 68 addr 03 alen 1 buffer 00f3dbf8 len 1
i2c_read, no chip responded 68
i2c_read: chip 68 addr 04 alen 1 buffer 00f3dbf8 len 1
i2c_read, no chip responded 68
i2c_read: chip 68 addr 05 alen 1 buffer 00f3dbf8 len 1
i2c_read, no chip responded 68
i2c_read: chip 68 addr 06 alen 1 buffer 00f3dbf8 len 1
i2c_read, no chip responded 68
Get RTC year: 00 mon: 00 mday: 00 wday: 00 hr: 00 min: 00 sec: 00
Get DATE: 2000-00-00 (wday=7)  TIME:  0:00:00
Date: 2000-00-00 (unknown day)    Time:  0:00:00
[ICM] $

Is there anything still I'm missing, Please do help me in this regard.

Thanks in Advance!

--Ganesh


 


		
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