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authorLinus Torvalds <torvalds@linux-foundation.org>2022-03-23 18:23:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-23 18:23:13 -0700
commitb4bc93bd76d4da32600795cd323c971f00a2e788 (patch)
tree8aebc8ae647d83ffa091c89bb164e7c24b0edfa9 /drivers/cpuidle
parentbaaa68a9796ef2cadfe5caaf4c730412eda0f31c (diff)
parent339ac71b233ee9ab5036be3abca0e5df793b5f64 (diff)
downloadlinux-b4bc93bd76d4da32600795cd323c971f00a2e788.tar.bz2
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 ...
Diffstat (limited to 'drivers/cpuidle')
-rw-r--r--drivers/cpuidle/cpuidle-qcom-spm.c28
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)) {