On 20.11.2019 16:08, Angus Ainslie wrote: > Hi Leonard, > > On 2019-11-14 12:09, Leonard Crestez wrote: >> Add initial support for dynamic frequency switching on pieces of the >> imx >> interconnect fabric. >> >> All this driver does is set a clk rate based on an opp table, it does >> not map register areas. >> > > Is this working with mainline ATF or does it still need to be used with > your modified ATF code ? This series doesn't perform SMC calls, that's done by the imx8m-ddrc driver: https://patchwork.kernel.org/cover/11244283/ This particular patch allows switching NOC frequency but that's just clk_set_rate. DDRC frequency switching requires the imx branch of ATF (v2.0 + ~200 patches) otherwise you will get probe failures. Source for imx atf is published here: https://source.codeaurora.org/external/imx/imx-atf/ For your particular 8mq B0 case slightly different setpoints are used and the fix is not in any public release yet so you need this: https://github.com/cdleonard/arm-trusted-firmware/commits/imx_2.0.y_busfreq Is "mainline ATF" an important criteria for Purism? -- Regards, Leonard
