Hi,
Currently i am debuging this issueimx6d wdog1 reboot not stable , but still can't fix this issue even if with the help from community.
So, I want to choose another way to implement reboot for my board, such as SNVS way (PMIC). both do_switch_normal in reboot.c and below func didn't make any sense to reboot, power consumption has no change.
So, i have missed other things for this? thanks.
void do_power_off(void)
14 {
13 u32 reg;
12 void *addr;
11 phys_addr_t snvs_base_addr;
10 phys_addr_t snvs_lpcr;
9 size_t snvs_size;
8 if (cpu_is_imx6()) {
7 pr_warn("cpu is mx6\n");
6 snvs_base_addr = MX6_SNVS_BASE_ADDR;
5 snvs_size = MX6_SNVS_SIZE;
4 snvs_lpcr = MX6_SNVS_LPCR;
3 } else {
2 snvs_base_addr = MX7_SNVS_BASE_ADDR;
1 snvs_size = MX7_SNVS_SIZE;
79 snvs_lpcr = MX7_SNVS_LPCR;
1 }
11
10 addr = ioremap(snvs_base_addr, snvs_size);
9 if (!addr) {
8 pr_warn("SNVS ioremap failed!\n");
7 return;
6 }
5 reg = __raw_readl(addr + snvs_lpcr);
4 reg |= 0x60;
3 pr_warn("PMIC Config...\n");
2 __raw_writel(reg, (addr + snvs_lpcr));
1 iounmap(addr);
92 }
[ 12.428086] sysrq: SysRq : Emergency Remount R/O
[ 12.435704] EXT4-fs (mmcblk3p6): re-mounted. Opts: (null)
[ 12.448787] EXT4-fs (mmcblk3p4): re-mounted. Opts: (null)
[ 12.467832] Emergency Remount complete
[ 13.066736] imx2-wdt 20bc000.wdog: Device shutdown: Expect reboot!
[ 13.073044] reboot: Restarting system with command ''
[ 13.087046] cpu is mx6
[ 13.089432] PMIC Config...
[ 14.092149] Reboot failed -- System halted
Hi jiu
reliable reboot can be implemented only removing power (voltage source)
to all components on the board, as it is done on i.MX6Q Sabre SD spf-27392
schematic p.21 (WDOG_B,PWRON, U507 components).
In general one can try other options as described on
Q&A: How is mx6 PMIC_ON_REQ under SW control?
or rtcwakeup in imx-test
www.nxp.com/lgfiles/NMG/MAD/YOCTO/imx-test-5.7.tar.gz
If board hangs may be recommended to check VDD_ARM_IN, VDD_SOC_IN voltages
they should be configured for 792 MHz for reliable reboot. Linux cpufreq/busfreq
drivers may lower these voltages to values, not suitable for reboot.
Best regards
igor
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Hi Igor,
Hi jiu
please make board modifications as is done on i.MX6Q Sabre SD spf-27392
schematic p.21 (WDOG_B,PWRON, U507 components).
Best regards
igor
wdog1 reboot issue is fixed by kernel dts.