Merge tag 'arm-drivers-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM driver updates from Arnd Bergmann:
 "There are a few separately maintained driver subsystems that we merge
  through the SoC tree, notable changes are:

   - Memory controller updates, mainly for Tegra and Mediatek SoCs, and
     clarifications for the memory controller DT bindings

   - SCMI firmware interface updates, in particular a new transport
     based on OPTEE and support for atomic operations.

   - Cleanups to the TEE subsystem, refactoring its memory management

  For SoC specific drivers without a separate subsystem, changes include

   - Smaller updates and fixes for TI, AT91/SAMA5, Qualcomm and NXP
     Layerscape SoCs.

   - Driver support for Microchip SAMA5D29, Tesla FSD, Renesas RZ/G2L,
     and Qualcomm SM8450.

   - Better power management on Mediatek MT81xx, NXP i.MX8MQ and older
     NVIDIA Tegra chips"

* tag 'arm-drivers-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (154 commits)
  ARM: spear: fix typos in comments
  soc/microchip: fix invalid free in mpfs_sys_controller_delete
  soc: s4: Add support for power domains controller
  dt-bindings: power: add Amlogic s4 power domains bindings
  ARM: at91: add support in soc driver for new SAMA5D29
  soc: mediatek: mmsys: add sw0_rst_offset in mmsys driver data
  dt-bindings: memory: renesas,rpc-if: Document RZ/V2L SoC
  memory: emif: check the pointer temp in get_device_details()
  memory: emif: Add check for setup_interrupts
  dt-bindings: arm: mediatek: mmsys: add support for MT8186
  dt-bindings: mediatek: add compatible for MT8186 pwrap
  soc: mediatek: pwrap: add pwrap driver for MT8186 SoC
  soc: mediatek: mmsys: add mmsys reset control for MT8186
  soc: mediatek: mtk-infracfg: Disable ACP on MT8192
  soc: ti: k3-socinfo: Add AM62x JTAG ID
  soc: mediatek: add MTK mutex support for MT8186
  soc: mediatek: mmsys: add mt8186 mmsys routing table
  soc: mediatek: pm-domains: Add support for mt8186
  dt-bindings: power: Add MT8186 power domains
  soc: mediatek: pm-domains: Add support for mt8195
  ...

1 files changed, 24 insertions, 4 deletions

diff --git a/drivers/cpuidle/cpuidle-qcom-spm.c b/drivers/cpuidle/cpuidle-qcom-spm.c
index 01e77913a414..beedf22cbe78 100644
--- a/drivers/cpuidle/cpuidle-qcom-spm.c
+++ b/drivers/cpuidle/cpuidle-qcom-spm.c
@@ -122,10 +122,6 @@ static int spm_cpuidle_register(struct device *cpuidle_dev, int cpu)
 	if (ret <= 0)
 		return ret ? : -ENODEV;
 
-	ret = qcom_scm_set_warm_boot_addr(cpu_resume_arm, cpumask_of(cpu));
-	if (ret)
-		return ret;
-
 	return cpuidle_register(&data->cpuidle_driver, NULL);
 }
 
@@ -136,6 +132,10 @@ static int spm_cpuidle_drv_probe(struct platform_device *pdev)
 	if (!qcom_scm_is_available())
 		return -EPROBE_DEFER;
 
+	ret = qcom_scm_set_warm_boot_addr(cpu_resume_arm);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "set warm boot addr failed");
+
 	for_each_possible_cpu(cpu) {
 		ret = spm_cpuidle_register(&pdev->dev, cpu);
 		if (ret && ret != -ENODEV) {
@@ -155,6 +155,22 @@ static struct platform_driver spm_cpuidle_driver = {
 	},
 };
 
+static bool __init qcom_spm_find_any_cpu(void)
+{
+	struct device_node *cpu_node, *saw_node;
+
+	for_each_of_cpu_node(cpu_node) {
+		saw_node = of_parse_phandle(cpu_node, "qcom,saw", 0);
+		if (of_device_is_available(saw_node)) {
+			of_node_put(saw_node);
+			of_node_put(cpu_node);
+			return true;
+		}
+		of_node_put(saw_node);
+	}
+	return false;
+}
+
 static int __init qcom_spm_cpuidle_init(void)
 {
 	struct platform_device *pdev;
@@ -164,6 +180,10 @@ static int __init qcom_spm_cpuidle_init(void)
 	if (ret)
 		return ret;
 
+	/* Make sure there is actually any CPU managed by the SPM */
+	if (!qcom_spm_find_any_cpu())
+		return 0;
+
 	pdev = platform_device_register_simple("qcom-spm-cpuidle",
 					       -1, NULL, 0);
 	if (IS_ERR(pdev)) {