--- zzzz-none-000/linux-3.10.107/arch/arm/mach-tegra/platsmp.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/arm/mach-tegra/platsmp.c	2021-02-04 17:41:59.000000000 +0000
@@ -11,31 +11,32 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#include <linux/init.h>
-#include <linux/errno.h>
+
+#include <linux/clk/tegra.h>
 #include <linux/delay.h>
 #include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/io.h>
 #include <linux/jiffies.h>
 #include <linux/smp.h>
-#include <linux/io.h>
-#include <linux/clk/tegra.h>
+
+#include <soc/tegra/fuse.h>
+#include <soc/tegra/pmc.h>
 
 #include <asm/cacheflush.h>
 #include <asm/mach-types.h>
-#include <asm/smp_scu.h>
 #include <asm/smp_plat.h>
-
-#include "fuse.h"
-#include "flowctrl.h"
-#include "reset.h"
-#include "pmc.h"
+#include <asm/smp_scu.h>
 
 #include "common.h"
+#include "flowctrl.h"
 #include "iomap.h"
+#include "reset.h"
 
 static cpumask_t tegra_cpu_init_mask;
 
-static void __cpuinit tegra_secondary_init(unsigned int cpu)
+static void tegra_secondary_init(unsigned int cpu)
 {
 	cpumask_set_cpu(cpu, &tegra_cpu_init_mask);
 }
@@ -114,7 +115,7 @@
 
 		/* Wait for the power to come up. */
 		timeout = jiffies + msecs_to_jiffies(100);
-		while (tegra_pmc_cpu_is_powered(cpu)) {
+		while (!tegra_pmc_cpu_is_powered(cpu)) {
 			if (time_after(jiffies, timeout))
 				return -ETIMEDOUT;
 			udelay(10);
@@ -140,18 +141,43 @@
 
 static int tegra114_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
+	int ret = 0;
+
 	cpu = cpu_logical_map(cpu);
-	return tegra_pmc_cpu_power_on(cpu);
+
+	if (cpumask_test_cpu(cpu, &tegra_cpu_init_mask)) {
+		/*
+		 * Warm boot flow
+		 * The flow controller in charge of the power state and
+		 * control for each CPU.
+		 */
+		/* set SCLK as event trigger for flow controller */
+		flowctrl_write_cpu_csr(cpu, 1);
+		flowctrl_write_cpu_halt(cpu,
+				FLOW_CTRL_WAITEVENT | FLOW_CTRL_SCLK_RESUME);
+	} else {
+		/*
+		 * Cold boot flow
+		 * The CPU is powered up by toggling PMC directly. It will
+		 * also initial power state in flow controller. After that,
+		 * the CPU's power state is maintained by flow controller.
+		 */
+		ret = tegra_pmc_cpu_power_on(cpu);
+	}
+
+	return ret;
 }
 
-static int __cpuinit tegra_boot_secondary(unsigned int cpu,
+static int tegra_boot_secondary(unsigned int cpu,
 					  struct task_struct *idle)
 {
-	if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_chip_id == TEGRA20)
+	if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_get_chip_id() == TEGRA20)
 		return tegra20_boot_secondary(cpu, idle);
-	if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_chip_id == TEGRA30)
+	if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_get_chip_id() == TEGRA30)
 		return tegra30_boot_secondary(cpu, idle);
-	if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_chip_id == TEGRA114)
+	if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_get_chip_id() == TEGRA114)
+		return tegra114_boot_secondary(cpu, idle);
+	if (IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC) && tegra_get_chip_id() == TEGRA124)
 		return tegra114_boot_secondary(cpu, idle);
 
 	return -EINVAL;