What about getting the status?
It appears there are 5 register values, of which:
- arg0 = IMX_FSL_SIP_SRTC
- arg1 = IMX_FSL_SIP_SRTC_GET_WDOG_STAT
- arg2 = ?
- arg3 = ?
- arg4 = ?
The return value is always zero and all arg's are type uint64 and not pointers, which doesn't leave any other options unless the function itself is different for a "GET". The only smc call I see is:
Also, is there a document which specifies which registers map to which for smc calls?
static inline imx_smc_status_t imx_smc_call_psci(
uint64_t reg0, uint64_t reg1, uint64_t reg2, uint64_t reg3, uint64_t reg4)
{
__asm__ __volatile__(
"ldr x0, %0\n"
"ldr x1, %1\n"
"ldr x2, %2\n"
"ldr x3, %3\n"
"ldr x4, %4\n"
"smc #0\n"
"str x0, %0\n"
: "+m"(reg0), "+m"(reg1),
"+m"(reg2), "+m"(reg3), "+m"(reg4)
: "m"(reg0)
: "x0", "x1", "x2", "x3", "x4"
);
return reg0;
}
Reference:
#define IMX_FSL_SIP_SRTC 0xC2000002
#define IMX_FSL_SIP_SRTC_SET_TIME 0x00
#define IMX_FSL_SIP_SRTC_START_WDOG 0x01
#define IMX_FSL_SIP_SRTC_STOP_WDOG 0x02
#define IMX_FSL_SIP_SRTC_SET_WDOG_ACT 0x03
#define IMX_FSL_SIP_SRTC_PING_WDOG 0x04
#define IMX_FSL_SIP_SRTC_SET_TIMEOUT_WDOG 0x05
#define IMX_FSL_SIP_SRTC_GET_WDOG_STAT 0x06
#define IMX_FSL_SIP_SRTC_SET_PRETIME_WDOG 0x07
