diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/cpuidle/Kconfig.arm | 13 | ||||
| -rw-r--r-- | drivers/cpuidle/Makefile | 1 | ||||
| -rw-r--r-- | drivers/cpuidle/cpuidle-qcom-spm.c (renamed from drivers/soc/qcom/spm.c) | 138 | ||||
| -rw-r--r-- | drivers/soc/qcom/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/soc/qcom/Makefile | 1 |
5 files changed, 66 insertions, 97 deletions
diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm index 99a2d72ac02b..51a7e89085c0 100644 --- a/drivers/cpuidle/Kconfig.arm +++ b/drivers/cpuidle/Kconfig.arm @@ -94,3 +94,16 @@ config ARM_TEGRA_CPUIDLE select ARM_CPU_SUSPEND help Select this to enable cpuidle for NVIDIA Tegra20/30/114/124 SoCs. + +config ARM_QCOM_SPM_CPUIDLE + bool "CPU Idle Driver for Qualcomm Subsystem Power Manager (SPM)" + depends on (ARCH_QCOM || COMPILE_TEST) && !ARM64 + select ARM_CPU_SUSPEND + select CPU_IDLE_MULTIPLE_DRIVERS + select DT_IDLE_STATES + select QCOM_SCM + help + Select this to enable cpuidle for Qualcomm processors. + The Subsystem Power Manager (SPM) controls low power modes for the + CPU and L2 cores. It interface with various system drivers to put + the cores in low power modes. diff --git a/drivers/cpuidle/Makefile b/drivers/cpuidle/Makefile index 55a464f6a78b..f07800cbb43f 100644 --- a/drivers/cpuidle/Makefile +++ b/drivers/cpuidle/Makefile @@ -25,6 +25,7 @@ obj-$(CONFIG_ARM_PSCI_CPUIDLE) += cpuidle_psci.o cpuidle_psci-y := cpuidle-psci.o cpuidle_psci-$(CONFIG_PM_GENERIC_DOMAINS_OF) += cpuidle-psci-domain.o obj-$(CONFIG_ARM_TEGRA_CPUIDLE) += cpuidle-tegra.o +obj-$(CONFIG_ARM_QCOM_SPM_CPUIDLE) += cpuidle-qcom-spm.o ############################################################################### # MIPS drivers diff --git a/drivers/soc/qcom/spm.c b/drivers/cpuidle/cpuidle-qcom-spm.c index 8e10e02c6aa5..adf91a6e4d7d 100644 --- a/drivers/soc/qcom/spm.c +++ b/drivers/cpuidle/cpuidle-qcom-spm.c @@ -19,10 +19,11 @@ #include <linux/cpu_pm.h> #include <linux/qcom_scm.h> -#include <asm/cpuidle.h> #include <asm/proc-fns.h> #include <asm/suspend.h> +#include "dt_idle_states.h" + #define MAX_PMIC_DATA 2 #define MAX_SEQ_DATA 64 #define SPM_CTL_INDEX 0x7f @@ -62,6 +63,7 @@ struct spm_reg_data { }; struct spm_driver_data { + struct cpuidle_driver cpuidle_driver; void __iomem *reg_base; const struct spm_reg_data *reg_data; }; @@ -107,11 +109,6 @@ static const struct spm_reg_data spm_reg_8064_cpu = { .start_index[PM_SLEEP_MODE_SPC] = 2, }; -static DEFINE_PER_CPU(struct spm_driver_data *, cpu_spm_drv); - -typedef int (*idle_fn)(void); -static DEFINE_PER_CPU(idle_fn*, qcom_idle_ops); - static inline void spm_register_write(struct spm_driver_data *drv, enum spm_reg reg, u32 val) { @@ -172,10 +169,9 @@ static int qcom_pm_collapse(unsigned long int unused) return -1; } -static int qcom_cpu_spc(void) +static int qcom_cpu_spc(struct spm_driver_data *drv) { int ret; - struct spm_driver_data *drv = __this_cpu_read(cpu_spm_drv); spm_set_low_power_mode(drv, PM_SLEEP_MODE_SPC); ret = cpu_suspend(0, qcom_pm_collapse); @@ -190,94 +186,49 @@ static int qcom_cpu_spc(void) return ret; } -static int qcom_idle_enter(unsigned long index) +static int spm_enter_idle_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int idx) { - return __this_cpu_read(qcom_idle_ops)[index](); + struct spm_driver_data *data = container_of(drv, struct spm_driver_data, + cpuidle_driver); + + return CPU_PM_CPU_IDLE_ENTER_PARAM(qcom_cpu_spc, idx, data); } -static const struct of_device_id qcom_idle_state_match[] __initconst = { - { .compatible = "qcom,idle-state-spc", .data = qcom_cpu_spc }, +static struct cpuidle_driver qcom_spm_idle_driver = { + .name = "qcom_spm", + .owner = THIS_MODULE, + .states[0] = { + .enter = spm_enter_idle_state, + .exit_latency = 1, + .target_residency = 1, + .power_usage = UINT_MAX, + .name = "WFI", + .desc = "ARM WFI", + } +}; + +static const struct of_device_id qcom_idle_state_match[] = { + { .compatible = "qcom,idle-state-spc", .data = spm_enter_idle_state }, { }, }; -static int __init qcom_cpuidle_init(struct device_node *cpu_node, int cpu) +static int spm_cpuidle_init(struct cpuidle_driver *drv, int cpu) { - const struct of_device_id *match_id; - struct device_node *state_node; - int i; - int state_count = 1; - idle_fn idle_fns[CPUIDLE_STATE_MAX]; - idle_fn *fns; - cpumask_t mask; - bool use_scm_power_down = false; - - if (!qcom_scm_is_available()) - return -EPROBE_DEFER; - - for (i = 0; ; i++) { - state_node = of_parse_phandle(cpu_node, "cpu-idle-states", i); - if (!state_node) - break; - - if (!of_device_is_available(state_node)) - continue; - - if (i == CPUIDLE_STATE_MAX) { - pr_warn("%s: cpuidle states reached max possible\n", - __func__); - break; - } - - match_id = of_match_node(qcom_idle_state_match, state_node); - if (!match_id) - return -ENODEV; - - idle_fns[state_count] = match_id->data; - - /* Check if any of the states allow power down */ - if (match_id->data == qcom_cpu_spc) - use_scm_power_down = true; - - state_count++; - } - - if (state_count == 1) - goto check_spm; - - fns = devm_kcalloc(get_cpu_device(cpu), state_count, sizeof(*fns), - GFP_KERNEL); - if (!fns) - return -ENOMEM; - - for (i = 1; i < state_count; i++) - fns[i] = idle_fns[i]; + int ret; - if (use_scm_power_down) { - /* We have atleast one power down mode */ - cpumask_clear(&mask); - cpumask_set_cpu(cpu, &mask); - qcom_scm_set_warm_boot_addr(cpu_resume_arm, &mask); - } + memcpy(drv, &qcom_spm_idle_driver, sizeof(*drv)); + drv->cpumask = (struct cpumask *)cpumask_of(cpu); - per_cpu(qcom_idle_ops, cpu) = fns; + /* Parse idle states from device tree */ + ret = dt_init_idle_driver(drv, qcom_idle_state_match, 1); + if (ret <= 0) + return ret ? : -ENODEV; - /* - * SPM probe for the cpu should have happened by now, if the - * SPM device does not exist, return -ENXIO to indicate that the - * cpu does not support idle states. - */ -check_spm: - return per_cpu(cpu_spm_drv, cpu) ? 0 : -ENXIO; + /* We have atleast one power down mode */ + return qcom_scm_set_warm_boot_addr(cpu_resume_arm, drv->cpumask); } -static const struct cpuidle_ops qcom_cpuidle_ops __initconst = { - .suspend = qcom_idle_enter, - .init = qcom_cpuidle_init, -}; - -CPUIDLE_METHOD_OF_DECLARE(qcom_idle_v1, "qcom,kpss-acc-v1", &qcom_cpuidle_ops); -CPUIDLE_METHOD_OF_DECLARE(qcom_idle_v2, "qcom,kpss-acc-v2", &qcom_cpuidle_ops); - static struct spm_driver_data *spm_get_drv(struct platform_device *pdev, int *spm_cpu) { @@ -323,11 +274,15 @@ static int spm_dev_probe(struct platform_device *pdev) struct resource *res; const struct of_device_id *match_id; void __iomem *addr; - int cpu; + int cpu, ret; + + if (!qcom_scm_is_available()) + return -EPROBE_DEFER; drv = spm_get_drv(pdev, &cpu); if (!drv) return -EINVAL; + platform_set_drvdata(pdev, drv); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); drv->reg_base = devm_ioremap_resource(&pdev->dev, res); @@ -340,6 +295,10 @@ static int spm_dev_probe(struct platform_device *pdev) drv->reg_data = match_id->data; + ret = spm_cpuidle_init(&drv->cpuidle_driver, cpu); + if (ret) + return ret; + /* Write the SPM sequences first.. */ addr = drv->reg_base + drv->reg_data->reg_offset[SPM_REG_SEQ_ENTRY]; __iowrite32_copy(addr, drv->reg_data->seq, @@ -362,13 +321,20 @@ static int spm_dev_probe(struct platform_device *pdev) /* Set up Standby as the default low power mode */ spm_set_low_power_mode(drv, PM_SLEEP_MODE_STBY); - per_cpu(cpu_spm_drv, cpu) = drv; + return cpuidle_register(&drv->cpuidle_driver, NULL); +} + +static int spm_dev_remove(struct platform_device *pdev) +{ + struct spm_driver_data *drv = platform_get_drvdata(pdev); + cpuidle_unregister(&drv->cpuidle_driver); return 0; } static struct platform_driver spm_driver = { .probe = spm_dev_probe, + .remove = spm_dev_remove, .driver = { .name = "saw", .of_match_table = spm_match_table, diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig index bf42a17a45de..285baa7e474e 100644 --- a/drivers/soc/qcom/Kconfig +++ b/drivers/soc/qcom/Kconfig @@ -80,16 +80,6 @@ config QCOM_PDR_HELPERS tristate select QCOM_QMI_HELPERS -config QCOM_PM - bool "Qualcomm Power Management" - depends on ARCH_QCOM && !ARM64 - select ARM_CPU_SUSPEND - select QCOM_SCM - help - QCOM Platform specific power driver to manage cores and L2 low power - modes. It interface with various system drivers to put the cores in - low power modes. - config QCOM_QMI_HELPERS tristate depends on NET diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile index 5d6b83dc58e8..92cc4232d72c 100644 --- a/drivers/soc/qcom/Makefile +++ b/drivers/soc/qcom/Makefile @@ -8,7 +8,6 @@ obj-$(CONFIG_QCOM_GSBI) += qcom_gsbi.o obj-$(CONFIG_QCOM_MDT_LOADER) += mdt_loader.o obj-$(CONFIG_QCOM_OCMEM) += ocmem.o obj-$(CONFIG_QCOM_PDR_HELPERS) += pdr_interface.o -obj-$(CONFIG_QCOM_PM) += spm.o obj-$(CONFIG_QCOM_QMI_HELPERS) += qmi_helpers.o qmi_helpers-y += qmi_encdec.o qmi_interface.o obj-$(CONFIG_QCOM_RMTFS_MEM) += rmtfs_mem.o |