-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Somebody in the thread at some point said: | In a message from Ben Dooks on linux-arm-kernel about cpufreq, he said: | | > > - My patches have code to use hardware flow control to "pause" the | > > serial ports during frequency transitions, so as to not confuse the | > > GTA01 GSM modem (or Openmoko's gsmd). | > | > That is useful for designs that forgot to provide a stable UCLK to | > provide UART baud clocks... all of the ones that I've had a direct | > hand in working on feed back or feed in an external known (and stable) | > clock. | | It might be worth considering this on future designs (looking at the | schematics, GTA01 uses the pin for something else, while GTA02 doesn't | connect the pin at all).
It's a good point, it would help the UART continuity during clock change. But it means adding an oscillator somewhere? There's a PLL from the Wolfson we could maybe use. - -Andy -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iEYEARECAAYFAki1cBsACgkQOjLpvpq7dMrLhQCeOz0JgQB6VQtnsMvaBrFvJTeS IbAAnRdHVxKvYsAFuBPnx27vOIjzkKBb =aOYk -----END PGP SIGNATURE----- _______________________________________________ hardware mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/hardware
