Hi Michal, On 2/15/24 14:53, John Ernberg wrote: > Hi Michal, > > On 2/15/24 10:02, Michal Orzel wrote: >> Hi, >> >> On 14/02/2024 17:06, John Ernberg wrote: >>> >>> >>> When using Linux for dom0 there are a bunch of drivers that need to >>> do SMC >>> SIP calls into the firmware to enable certain hardware bits like the >>> watchdog. >>> >>> Provide a basic platform glue that implements the needed SMC forwarding. >>> >>> The format of these calls are as follows: >>> - reg 0: service ID >>> - reg 1: function ID >>> remaining regs: args >>> >>> For now we only allow Dom0 to make these calls as they are all managing >>> hardware. There is no specification for these SIP calls, the IDs and >>> names >>> have been extracted from the upstream linux kernel and the vendor >>> kernel. >>> >>> Most of the SIP calls are only available for the iMX8M series of >>> SoCs, so >>> they are easy to reject and they need to be revisited when iMX8M series >>> support is added. >> Given that you named your driver *qm and you search for dt compatible >> *qm, *qxp, does it really >> make sense to add SIP calls for iMX8M? > > The idea was to be explicit about why it makes no sense to support those > SIPs on a qm/qxp implementation. > > I can take it out if that's not argument enough to have them.
[ ... ] >>> +#define IMX_SIP_GET_SOC_INFO 0xC2000006 >>> +#define IMX_SIP_NOC 0xC2000008 >>> +#define IMX_SIP_WAKEUP_SRC 0xC2000009 >>> +#define IMX_SIP_OTP_WRITE 0xC200000B >> Looking at ATF, for QM,QXP there are also: >> BUILDINFO 0xC2000003 >> OTP_READ 0xC200000A >> SET_TEMP 0xC200000C > > I can't find them in the current Linux code, perhaps deprecated. > I can add them and deny them if it makes sense. >> >>> + >>> +#define IMX_SIP_TIME_F_RTC_SET_TIME 0x00 >>> +#define IMX_SIP_TIME_F_WDOG_START 0x01 >>> +#define IMX_SIP_TIME_F_WDOG_STOP 0x02 >>> +#define IMX_SIP_TIME_F_WDOG_SET_ACT 0x03 >>> +#define IMX_SIP_TIME_F_WDOG_PING 0x04 >>> +#define IMX_SIP_TIME_F_WDOG_SET_TIMEOUT 0x05 >>> +#define IMX_SIP_TIME_F_WDOG_GET_STAT 0x06 >>> +#define IMX_SIP_TIME_F_WDOG_SET_PRETIME 0x07 >>> + Ping. Thanks! // John Ernberg
