Merge tag 'tegra-for-5.16-cpuidle' of...

Merge tag 'tegra-for-5.16-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers

cpuidle: tegra: Changes for v5.16-rc1

This pulls in the for-5.16/clk and for-5.16/soc branches and uses the
stubs added in them to enable compile testing of the cpuidle driver.
While at it, this also fixes a potential driver probe order race
condition between the PMC and the cpuidle driver.

* tag 'tegra-for-5.16-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  cpuidle: tegra: Check whether PMC is ready
  cpuidle: tegra: Enable compile testing
  clk: tegra: Add stubs needed for compile testing

Link: https://lore.kernel.org/r/20211008201132.1678814-5-thierry.reding@gmail.comSigned-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/cpuidle/Kconfig.arm

@@ -99,7 +99,7 @@ config ARM_MVEBU_V7_CPUIDLE
 
 config ARM_TEGRA_CPUIDLE
 	bool "CPU Idle Driver for NVIDIA Tegra SoCs"
-	depends on ARCH_TEGRA && !ARM64
+	depends on (ARCH_TEGRA || COMPILE_TEST) && !ARM64 && MMU
 	select ARCH_NEEDS_CPU_IDLE_COUPLED if SMP
 	select ARM_CPU_SUSPEND
 	help

drivers/cpuidle/cpuidle-tegra.c

@@ -337,6 +337,9 @@ static void tegra_cpuidle_setup_tegra114_c7_state(void)
 
 static int tegra_cpuidle_probe(struct platform_device *pdev)
 {
+	if (tegra_pmc_get_suspend_mode() == TEGRA_SUSPEND_NOT_READY)
+		return -EPROBE_DEFER;
+
 	/* LP2 could be disabled in device-tree */
 	if (tegra_pmc_get_suspend_mode() < TEGRA_SUSPEND_LP2)
 		tegra_cpuidle_disable_state(TEGRA_CC6);

include/linux/clk/tegra.h

@@ -42,6 +42,7 @@ struct tegra_cpu_car_ops {
 #endif
 };
 
+#ifdef CONFIG_ARCH_TEGRA
 extern struct tegra_cpu_car_ops *tegra_cpu_car_ops;
 
 static inline void tegra_wait_cpu_in_reset(u32 cpu)
@@ -83,8 +84,29 @@ static inline void tegra_disable_cpu_clock(u32 cpu)
 
 	tegra_cpu_car_ops->disable_clock(cpu);
 }
+#else
+static inline void tegra_wait_cpu_in_reset(u32 cpu)
+{
+}
 
-#ifdef CONFIG_PM_SLEEP
+static inline void tegra_put_cpu_in_reset(u32 cpu)
+{
+}
+
+static inline void tegra_cpu_out_of_reset(u32 cpu)
+{
+}
+
+static inline void tegra_enable_cpu_clock(u32 cpu)
+{
+}
+
+static inline void tegra_disable_cpu_clock(u32 cpu)
+{
+}
+#endif
+
+#if defined(CONFIG_ARCH_TEGRA) && defined(CONFIG_PM_SLEEP)
 static inline bool tegra_cpu_rail_off_ready(void)
 {
 	if (WARN_ON(!tegra_cpu_car_ops->rail_off_ready))