I am able to switch between both the buses, by CONFIG_I2C_MODULE to 1 or 2.
#if (CFG_I2C_MODULE == 2) #define I2C_BASE MPC5XXX_I2C2 #elif (CFG_I2C_MODULE == 1) #define I2C_BASE MPC5XXX_I2C1 #else #error CFG_I2C_MODULE is not properly configured #endif
But my problem is I have to scan both the buses dynamically in the run time.
Regards, Yasotha Balan R Member Technical Staff - HPEG HCL Technologies Ltd. 73,74, South Phase Road, Ambattur Indutrial Estate, Chennai 600058. Tel: +91-044-43935000 Extn. (5076) Mob: +91-9994309885 www.hcltech.com www.hcl.in
-----Original Message----- From: Ben Warren [mailto:bwarren@qstreams.com] Sent: Monday, October 22, 2007 8:27 PM To: Yasothabalan Ramaswamy-TLS,Chennai Cc: u-boot-users@lists.sourceforge.net Subject: Re: [U-Boot-Users] I2C scanning
Yasothabalan,
Yasothabalan Ramaswamy-TLS,Chennai wrote:
Hi all,
I am using MPC5200B CPU.
I am using both the I2C buses present as defined below,
#define MPC5XXX_I2C1 (CFG_MBAR + 0x3D00)
#define MPC5XXX_I2C2 (CFG_MBAR + 0x3D40)
Is it possible to scan both the buses in the run time and do read/write operation?
I am here able to scan only one bus.
How can I fix this issue?
I don't know anything about this CPU, but the following code in cpu/mpc5xxx/i2c.c makes me think you can't use both I2C buses on this chip:
#if (CFG_I2C_MODULE == 2) #define I2C_BASE MPC5XXX_I2C2 #elif (CFG_I2C_MODULE == 1) #define I2C_BASE MPC5XXX_I2C1 #else #error CFG_I2C_MODULE is not properly configured #endif
If, however, this chip shares the same I2C controller as the MPC8xxx chips (I have no idea if it does or doesn't), with a little Makefile magic you could use the fsl_i2c.c driver, which supports multiple buses.
regards, Ben
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