I tried to change the i2C clock to 100KHz.
i2c_imx says following, in my understanding is 24000000 / 240 = 100000.
<i2c_imx_set_clk> I2C_CLK=24000000, REQ DIV=240
<i2c_imx_set_clk> IFDR[IC]=0xf, REAL DIV=240
*clock source is "clk24m"
But,I checked the SCL line using oscilloscope, I can see about 255KHz.....
If source clock changed to "ipg"(66MHz), i2c_imx says,
<i2c_imx_set_clk> I2C_CLK=66000000, REQ DIV=660
<i2c_imx_set_clk> IFDR[IC]=0x39, REAL DIV=768
calculated clock value is 66000000 / 768 = 85937.5, and I can see about 86KHz on the SCL line(probably correct).
So , I wanted to check the value of IFDR register, but the memtool returned "Bus error".
1. When the clock source is a 24MHz, why correct setting is not performed?
2. Why memtool returned "Bus Error" ?