* [U-Boot] i2c driver for arm926ejs - at91sam9m10g45
@ 2012-04-19 15:08 Wilson Perez
2012-04-20 9:48 ` Marek Vasut
0 siblings, 1 reply; 2+ messages in thread
From: Wilson Perez @ 2012-04-19 15:08 UTC (permalink / raw)
To: u-boot
I'm interested in the i2c driver for the arm926ejs cpu and at91sam9m10g45
board. I'm dealing with the issue that when enabling CONFIG_SOFT_I2C it
needs proper definitions for I2C_INIT, I2C_SDA, I2C_READ, etc. and when
enabling CONFIG_HARD_I2C the build fails with undefined references:
i2c_init, i2c_read, i2c_write, i2c_probe.
Can someone please point me in the right direction?
Thanks.
Wilson
^ permalink raw reply [flat|nested] 2+ messages in thread
* [U-Boot] i2c driver for arm926ejs - at91sam9m10g45
2012-04-19 15:08 [U-Boot] i2c driver for arm926ejs - at91sam9m10g45 Wilson Perez
@ 2012-04-20 9:48 ` Marek Vasut
0 siblings, 0 replies; 2+ messages in thread
From: Marek Vasut @ 2012-04-20 9:48 UTC (permalink / raw)
To: u-boot
Dear Wilson Perez,
> I'm interested in the i2c driver for the arm926ejs cpu and at91sam9m10g45
> board. I'm dealing with the issue that when enabling CONFIG_SOFT_I2C it
> needs proper definitions for I2C_INIT, I2C_SDA, I2C_READ, etc. and when
> enabling CONFIG_HARD_I2C the build fails with undefined references:
> i2c_init, i2c_read, i2c_write, i2c_probe.
>
> Can someone please point me in the right direction?
Well of course, you need to implement that API (i2c_read/write/probe/init()
calls) if you want hardware-assisted I2c, check your CPU datasheet.
If you implement only soft-spi, you need to implement I2C_SDA etc functions,
which flip the GPIO lines that emulate the SPI.
>
> Thanks.
>
> Wilson
Best regards,
Marek Vasut
^ permalink raw reply [flat|nested] 2+ messages in thread
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2012-04-19 15:08 [U-Boot] i2c driver for arm926ejs - at91sam9m10g45 Wilson Perez
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