Loading Documentation/devicetree/bindings/arm/msm/system_pm.txt 0 → 100644 +29 −0 Original line number Diff line number Diff line SYSTEM PM System PM device is a virtual device that handles all CPU subsystem low power mode activties. When entering core shutdown, resource state that were requested from the processor may be relinquished and set to idle and restored when the cores are brought out of sleep. PROPERTIES - compatible: Usage: required Value type: <string> Definition: must be "qcom,system-pm". -mboxes: Usage: optional Value type: <phandle> Definition: phandle the TCS mailbox controller for the CPU subsystem. This property is generally set only for SoCs that use RPMH communication through a mailbox controller. EXAMPLE system_pm { compatible = "qcom,system-pm"; mboxes = <&apps_rsc 0>; }; drivers/soc/qcom/Kconfig +4 −0 Original line number Diff line number Diff line Loading @@ -286,6 +286,10 @@ config QTI_RPMH_API bool "QTI RPMH (h/w accelerators) Communication API" select MAILBOX select QTI_RPMH_MBOX select QTI_SYSTEM_PM help This option enables RPMH hardware communication for making shared resource requests on Qualcomm Technologies Inc SoCs. config QTI_SYSTEM_PM bool drivers/soc/qcom/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -31,3 +31,4 @@ obj-$(CONFIG_MSM_GLINK_SPI_XPRT) += glink_spi_xprt.o obj-$(CONFIG_TRACER_PKT) += tracer_pkt.o obj-$(CONFIG_QCOM_BUS_SCALING) += msm_bus/ obj-$(CONFIG_QTI_RPMH_API) += rpmh.o obj-$(CONFIG_QTI_SYSTEM_PM) += system_pm.o drivers/soc/qcom/system_pm.c 0 → 100644 +87 −0 Original line number Diff line number Diff line /* Copyright (c) 2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include <linux/kernel.h> #include <linux/platform_device.h> #include <soc/qcom/rpmh.h> #define PDC_TIME_VALID_SHIFT 31 #define PDC_TIME_UPPER_MASK 0xFFFFFF static struct rpmh_client *rpmh_client; static int setup_wakeup(uint64_t sleep_val) { struct tcs_cmd cmd[3] = { { 0 } }; cmd[0].data = sleep_val & 0xFFFFFFFF; cmd[1].data = (sleep_val >> 32) & PDC_TIME_UPPER_MASK; cmd[1].data |= 1 << PDC_TIME_VALID_SHIFT; return rpmh_write_control(rpmh_client, cmd, ARRAY_SIZE(cmd)); } /** * system_sleep_enter() - Activties done when entering system low power modes * * @sleep_val: The qtimer value for the next wakeup time * * Returns 0 for success or error values from writing the timer value in the * hardware block. */ int system_sleep_enter(uint64_t sleep_val) { int ret; if (IS_ERR_OR_NULL(rpmh_client)) return -EFAULT; ret = rpmh_flush(rpmh_client); if (ret) return ret; return setup_wakeup(sleep_val); } EXPORT_SYMBOL(system_sleep_enter); /** * system_sleep_exit() - Activities done when exiting system low power modes */ void system_sleep_exit(void) { } EXPORT_SYMBOL(system_sleep_exit); static int sys_pm_probe(struct platform_device *pdev) { rpmh_client = rpmh_get_byindex(pdev, 0); if (IS_ERR_OR_NULL(rpmh_client)) return PTR_ERR(rpmh_client); return 0; } static const struct of_device_id sys_pm_drv_match[] = { { .compatible = "qcom,system-pm", }, { } }; static struct platform_driver sys_pm_driver = { .probe = sys_pm_probe, .driver = { .name = KBUILD_MODNAME, .of_match_table = sys_pm_drv_match, }, }; builtin_platform_driver(sys_pm_driver); include/soc/qcom/system_pm.h 0 → 100644 +28 −0 Original line number Diff line number Diff line /* Copyright (c) 2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #ifndef __SOC_QCOM_SYS_PM_H__ #define __SOC_QCOM_SYS_PM_H__ #ifdef CONFIG_QTI_SYSTEM_PM int system_sleep_enter(uint64_t sleep_val); void system_sleep_exit(void); #else static inline int system_sleep_enter(uint64_t sleep_val) { return -ENODEV; } static inline void system_sleep_exit(void) { } #endif /* CONFIG_QTI_SYSTEM_PM */ #endif /* __SOC_QCOM_SYS_PM_H__ */ Loading
Documentation/devicetree/bindings/arm/msm/system_pm.txt 0 → 100644 +29 −0 Original line number Diff line number Diff line SYSTEM PM System PM device is a virtual device that handles all CPU subsystem low power mode activties. When entering core shutdown, resource state that were requested from the processor may be relinquished and set to idle and restored when the cores are brought out of sleep. PROPERTIES - compatible: Usage: required Value type: <string> Definition: must be "qcom,system-pm". -mboxes: Usage: optional Value type: <phandle> Definition: phandle the TCS mailbox controller for the CPU subsystem. This property is generally set only for SoCs that use RPMH communication through a mailbox controller. EXAMPLE system_pm { compatible = "qcom,system-pm"; mboxes = <&apps_rsc 0>; };
drivers/soc/qcom/Kconfig +4 −0 Original line number Diff line number Diff line Loading @@ -286,6 +286,10 @@ config QTI_RPMH_API bool "QTI RPMH (h/w accelerators) Communication API" select MAILBOX select QTI_RPMH_MBOX select QTI_SYSTEM_PM help This option enables RPMH hardware communication for making shared resource requests on Qualcomm Technologies Inc SoCs. config QTI_SYSTEM_PM bool
drivers/soc/qcom/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -31,3 +31,4 @@ obj-$(CONFIG_MSM_GLINK_SPI_XPRT) += glink_spi_xprt.o obj-$(CONFIG_TRACER_PKT) += tracer_pkt.o obj-$(CONFIG_QCOM_BUS_SCALING) += msm_bus/ obj-$(CONFIG_QTI_RPMH_API) += rpmh.o obj-$(CONFIG_QTI_SYSTEM_PM) += system_pm.o
drivers/soc/qcom/system_pm.c 0 → 100644 +87 −0 Original line number Diff line number Diff line /* Copyright (c) 2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include <linux/kernel.h> #include <linux/platform_device.h> #include <soc/qcom/rpmh.h> #define PDC_TIME_VALID_SHIFT 31 #define PDC_TIME_UPPER_MASK 0xFFFFFF static struct rpmh_client *rpmh_client; static int setup_wakeup(uint64_t sleep_val) { struct tcs_cmd cmd[3] = { { 0 } }; cmd[0].data = sleep_val & 0xFFFFFFFF; cmd[1].data = (sleep_val >> 32) & PDC_TIME_UPPER_MASK; cmd[1].data |= 1 << PDC_TIME_VALID_SHIFT; return rpmh_write_control(rpmh_client, cmd, ARRAY_SIZE(cmd)); } /** * system_sleep_enter() - Activties done when entering system low power modes * * @sleep_val: The qtimer value for the next wakeup time * * Returns 0 for success or error values from writing the timer value in the * hardware block. */ int system_sleep_enter(uint64_t sleep_val) { int ret; if (IS_ERR_OR_NULL(rpmh_client)) return -EFAULT; ret = rpmh_flush(rpmh_client); if (ret) return ret; return setup_wakeup(sleep_val); } EXPORT_SYMBOL(system_sleep_enter); /** * system_sleep_exit() - Activities done when exiting system low power modes */ void system_sleep_exit(void) { } EXPORT_SYMBOL(system_sleep_exit); static int sys_pm_probe(struct platform_device *pdev) { rpmh_client = rpmh_get_byindex(pdev, 0); if (IS_ERR_OR_NULL(rpmh_client)) return PTR_ERR(rpmh_client); return 0; } static const struct of_device_id sys_pm_drv_match[] = { { .compatible = "qcom,system-pm", }, { } }; static struct platform_driver sys_pm_driver = { .probe = sys_pm_probe, .driver = { .name = KBUILD_MODNAME, .of_match_table = sys_pm_drv_match, }, }; builtin_platform_driver(sys_pm_driver);
include/soc/qcom/system_pm.h 0 → 100644 +28 −0 Original line number Diff line number Diff line /* Copyright (c) 2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #ifndef __SOC_QCOM_SYS_PM_H__ #define __SOC_QCOM_SYS_PM_H__ #ifdef CONFIG_QTI_SYSTEM_PM int system_sleep_enter(uint64_t sleep_val); void system_sleep_exit(void); #else static inline int system_sleep_enter(uint64_t sleep_val) { return -ENODEV; } static inline void system_sleep_exit(void) { } #endif /* CONFIG_QTI_SYSTEM_PM */ #endif /* __SOC_QCOM_SYS_PM_H__ */
