| README on how reset time on OMAPs should be calculated |
| |
| CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC: |
| Most OMAPs' provide a way to specify the time for |
| which the reset should be held low while the voltages |
| and Oscillator outputs stabilize. |
| |
| This time is mostly board and PMIC dependent. Hence the |
| boards are expected to specify a pre-computed time |
| using the above option, (the details on how to compute |
| the value are given below) without which a default time |
| as specified by CONFIG_DEFAULT_OMAP_RESET_TIME_MAX_USEC |
| is used. |
| |
| The value for CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC |
| can be computed using a summation of the below 3 parameters |
| -1- Time taken by the Osciallator to stop and restart |
| -2- PMIC OTP time |
| -3- Voltage ramp time, which can be derived using the |
| PMIC slew rate and value of voltage ramp needed. |
