CCS/AM5728: am5728

Hi Vishal,

I could read the first 16 bytes that give the Board name version in u-boot:

Beagle - x15

=> i2c dev 0
Setting bus to 0
=> i2c md 0x50 0x0
0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
=> i2c md 0x50 0x0
0000: aa 55 33 ee 41 4d 35 37 32 50 4d 5f 41 2e 33 30 .U3.AM572PM_A.30

AM574-IDK:

=> i2c dev 0
Setting bus to 0
=> i2c md 0x50 0x0
0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
=> i2c md 0x50 0x0
0000: aa 55 33 ee 41 4d 35 37 34 49 44 4b 31 2e 30 43 .U3.AM574IDK1.0C
=>

Let me know if you can try the same above on your board and if the above works for you.

Best Regards,
Keerthy

Hi Vishal,

In kenerl the i2cdump utility is not detecting the registers and shows all xx.

i2cdump -f -y 0x0 0x50 will give you all ff.

So the only other option is you have go through the driver for that part by adding the node:

diff --git a/arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi b/arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi
index 09f123c939..72fb3bbad8 100644
--- a/arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi
+++ b/arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi
@@ -230,6 +230,12 @@
        status = "okay";
        clock-frequency = <400000>;
 
+       at24@50 {
+               compatible = "atmel,24c256";
+               pagesize = <64>;
+               reg = <0x50>;
+       };
+

Once you boot kernel you can read using below:

cat /sys/bus/i2c/devices/0-0050/0-00500/nvmem

U3�AM574IDK1.0C09204P770045

Hope you can resolve the issue.

Besy Regards,
Keerthy

Hi Vishal,

Not sure about this. Could you use the same eeprog application to write back the default values?
I have never used eeprog application.

Regards,
Keerthy

Hi Vishal,

It is right above in this thread:
2c md 0x50 0x0
0000: aa 55 33 ee 41 4d 35 37 32 50 4d 5f 41 2e 33 30 .U3.AM572PM_A.30

Best Regards,
Keerthy