/* * Reset the system. It is called by machine_restart(). */ void arch_reset(char mode, const char *cmd) { unsigned int wcr_enable; arch_reset_special_mode(mode, cmd); #ifdef CONFIG_ARCH_MX6 /* wait for reset to assert... */ #ifdef CONFIG_MX6_INTER_LDO_BYPASS wcr_enable = 0x14; /*reset system by extern pmic*/ #else wcr_enable = (1 << 2); #endif __raw_writew(wcr_enable, wdog_base); /* errata TKT039676, SRS bit may be missed when SRC sample it, need to write the wdog controller twice to avoid it */ __raw_writew(wcr_enable, wdog_base); /* wait for reset to assert... */ mdelay(500); printk(KERN_ERR "Watchdog reset failed to assert reset\n"); return; #endif #ifdef CONFIG_MACH_MX51_EFIKAMX if (machine_is_mx51_efikamx()) { mx51_efikamx_reset(); return; } #endif if (cpu_is_mx1()) { wcr_enable = (1 << 0); } else { struct clk *clk; clk = clk_get_sys("imx2-wdt.0", NULL); if (!IS_ERR(clk)) clk_enable(clk); wcr_enable = (1 << 2); } /* Assert SRS signal */ __raw_writew(wcr_enable, wdog_base); /* wait for reset to assert... */ mdelay(500); printk(KERN_ERR "Watchdog reset failed to assert reset\n"); /* delay to allow the serial port to show the message */ mdelay(50); /* we'll take a jump through zero as a poor second */ cpu_reset(0); }
/* * Reset the system. It is called by machine_restart(). */ void mxc_restart(char mode, const char *cmd) { unsigned int wcr_enable; arch_reset_special_mode(mode, cmd); if (wdog_clk) clk_enable(wdog_clk); if (cpu_is_mx1()) wcr_enable = (1 << 0); /* * Some i.MX6 boards use WDOG2 to reset external pmic in bypass mode, * so do WDOG2 reset here. Do not set SRS, since we will * trigger external POR later. Use WDOG1 to reset in ldo-enable * mode. You can set it by "fsl,wdog-reset" in dts. * For i.MX6SX we have to trigger wdog-reset to reset QSPI-NOR flash to * workaround qspi-nor reboot issue whatever ldo-bypass or not. */ else if ((wdog_source == 2 && (cpu_is_imx6q() || cpu_is_imx6dl() || cpu_is_imx6sl())) || cpu_is_imx6sx()) wcr_enable = 0x14; else wcr_enable = (1 << 2); /* Assert SRS signal */ __raw_writew(wcr_enable, wdog_base); /* write twice to ensure the request will not get ignored */ __raw_writew(wcr_enable, wdog_base); /* wait for reset to assert... */ mdelay(500); pr_err("%s: Watchdog reset failed to assert reset\n", __func__); /* delay to allow the serial port to show the message */ mdelay(50); /* we'll take a jump through zero as a poor second */ soft_restart(0); }
/* * Reset the system. It is called by machine_restart(). */ void arch_reset(char mode, const char *cmd) { unsigned int wcr_enable; arch_reset_special_mode(mode, cmd); #ifdef CONFIG_ARCH_MX6 /* wait for reset to assert... */ if (enable_ldo_mode == LDO_MODE_BYPASSED && !(machine_is_mx6sl_evk() || machine_is_mx6sl_arm2())) { /*On Sabresd board use WDOG2 to reset external PMIC, so here do * more WDOG2 reset.*/ wcr_enable = 0x04;//rudolph add for reboot. 0x14 --> 0x04 20150302 __raw_writew(wcr_enable, IO_ADDRESS(MX6Q_WDOG2_BASE_ADDR)); __raw_writew(wcr_enable, IO_ADDRESS(MX6Q_WDOG2_BASE_ADDR)); } else { wcr_enable = (1 << 2); __raw_writew(wcr_enable, wdog_base); /* errata TKT039676, SRS bit may be missed when SRC sample it, need to write the wdog controller twice to avoid it */ __raw_writew(wcr_enable, wdog_base); } /* wait for reset to assert... */ mdelay(500); printk(KERN_ERR "Watchdog reset failed to assert reset\n"); return; #endif #ifdef CONFIG_MACH_MX51_EFIKAMX if (machine_is_mx51_efikamx()) { mx51_efikamx_reset(); return; } #endif #ifdef CONFIG_ARCH_MX51 /* Workaround to reset NFC_CONFIG3 register * due to the chip warm reset does not reset it */ if (cpu_is_mx53()) __raw_writel(0x20600, MX53_IO_ADDRESS(MX53_NFC_BASE_ADDR)+0x28); if (cpu_is_mx51()) __raw_writel(0x20600, MX51_IO_ADDRESS(MX51_NFC_BASE_ADDR)+0x28); #endif #ifdef CONFIG_ARCH_MX5 /* Stop DVFS-CORE before reboot. */ if (dvfs_core_is_active) stop_dvfs(); #endif if (cpu_is_mx1()) { wcr_enable = (1 << 0); } else { struct clk *clk; clk = clk_get_sys("imx2-wdt.0", NULL); if (!IS_ERR(clk)) clk_enable(clk); wcr_enable = (1 << 2); } /* Assert SRS signal */ __raw_writew(wcr_enable, wdog_base); /* wait for reset to assert... */ mdelay(500); printk(KERN_ERR "Watchdog reset failed to assert reset\n"); /* delay to allow the serial port to show the message */ mdelay(50); /* we'll take a jump through zero as a poor second */ cpu_reset(0); }