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122af7e193
Up until now cpu clock gets initialized at 384 MHz, which is the highest supported cpu clock. Recent A20 batches show an increased percentage of modules reacting very sensitive to operating conditions outside the specifications. The cpu dies very shortly after PLLs, core frequency or cpu voltage are missconfigured. E.g.: - uboot SPL selects 384 MHz as cpu clock which requires a cpu voltage of at least 1.1 V. - Linux CPU Frequency scaling with most sun7i dts will reduce cpu voltage down to 1.0 V. - When intiating a reboot or reset from linux the cpu voltage may keep the 1.0 V configuration and the cpu dies during SPL initialization. Therefore reduce cpu clock at uboot SPL initialization down to 144 MHz from 384 MHz. Use patch until KConfig option in uboot becomes available. Signed-off-by: Ludwig Kormann <ludwig.kormann@ict42.de> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> |
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| boot.cmd | ||
| genimage.cfg | ||
| linux.fragment | ||