From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752182AbaC1LOs (ORCPT ); Fri, 28 Mar 2014 07:14:48 -0400 Received: from top.free-electrons.com ([176.31.233.9]:35419 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751656AbaC1LOe (ORCPT ); Fri, 28 Mar 2014 07:14:34 -0400 From: Gregory CLEMENT To: Daniel Lezcano , "Rafael J. Wysocki" , linux-pm@vger.kernel.org, Jason Cooper , Andrew Lunn , Sebastian Hesselbarth , Gregory CLEMENT Cc: Thomas Petazzoni , Ezequiel Garcia , linux-arm-kernel@lists.infradead.org, Lior Amsalem , Tawfik Bayouk , Nadav Haklai , linux-kernel@vger.kernel.org Subject: [PATCH v6 10/11] cpuidle: mvebu: Add initial CPU idle support for Armada 370/XP SoC Date: Fri, 28 Mar 2014 12:13:30 +0100 Message-Id: <1396005211-15573-11-git-send-email-gregory.clement@free-electrons.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1396005211-15573-1-git-send-email-gregory.clement@free-electrons.com> References: <1396005211-15573-1-git-send-email-gregory.clement@free-electrons.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the wfi, cpu idle and cpu deep idle power states support for the Armada XP SoCs. All the latencies and the power consumption values used at the "armada_370_xp_idle_driver" structure are preliminary and will be modified in the future after running some measurements and analysis. Based on the work of Nadav Haklai. Signed-off-by: Nadav Haklai Signed-off-by: Gregory CLEMENT --- drivers/cpuidle/Kconfig.arm | 5 ++ drivers/cpuidle/Makefile | 1 + drivers/cpuidle/cpuidle-armada-370-xp.c | 93 +++++++++++++++++++++++++++++++++ 3 files changed, 99 insertions(+) create mode 100644 drivers/cpuidle/cpuidle-armada-370-xp.c diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm index 97ccc31dbdd8..5bb94780d377 100644 --- a/drivers/cpuidle/Kconfig.arm +++ b/drivers/cpuidle/Kconfig.arm @@ -1,6 +1,11 @@ # # ARM CPU Idle drivers # +config ARM_ARMADA_370_XP_CPUIDLE + bool "CPU Idle Driver for Armada 370/XP family processors" + depends on ARCH_MVEBU + help + Select this to enable cpuidle on Armada 370/XP processors. config ARM_BIG_LITTLE_CPUIDLE bool "Support for ARM big.LITTLE processors" diff --git a/drivers/cpuidle/Makefile b/drivers/cpuidle/Makefile index f71ae1b373c5..9902d052bd87 100644 --- a/drivers/cpuidle/Makefile +++ b/drivers/cpuidle/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED) += coupled.o ################################################################################## # ARM SoC drivers +obj-$(CONFIG_ARM_ARMADA_370_XP_CPUIDLE) += cpuidle-armada-370-xp.o obj-$(CONFIG_ARM_BIG_LITTLE_CPUIDLE) += cpuidle-big_little.o obj-$(CONFIG_ARM_HIGHBANK_CPUIDLE) += cpuidle-calxeda.o obj-$(CONFIG_ARM_KIRKWOOD_CPUIDLE) += cpuidle-kirkwood.o diff --git a/drivers/cpuidle/cpuidle-armada-370-xp.c b/drivers/cpuidle/cpuidle-armada-370-xp.c new file mode 100644 index 000000000000..6b98608c222e --- /dev/null +++ b/drivers/cpuidle/cpuidle-armada-370-xp.c @@ -0,0 +1,93 @@ +/* + * Marvell Armada 370 and Armada XP SoC cpuidle driver + * + * Copyright (C) 2013 Marvell + * + * Nadav Haklai + * Gregory CLEMENT + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + * + * Maintainer: Gregory CLEMENT + */ + +#include +#include +#include +#include +#include +#include +#include + +#define ARMADA_370_XP_MAX_STATES 3 +#define ARMADA_370_XP_FLAG_DEEP_IDLE 0x10000 + +static int (*armada_370_xp_cpu_suspend)(int); + +static int armada_370_xp_enter_idle(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + int ret; + bool deepidle = false; + cpu_pm_enter(); + + if (drv->states[index].flags & ARMADA_370_XP_FLAG_DEEP_IDLE) + deepidle = true; + + ret = armada_370_xp_cpu_suspend(deepidle); + if (ret) + return ret; + + cpu_pm_exit(); + + return index; +} + +static struct cpuidle_driver armada_370_xp_idle_driver = { + .name = "armada_370_xp_idle", + .states[0] = ARM_CPUIDLE_WFI_STATE, + .states[1] = { + .enter = armada_370_xp_enter_idle, + .exit_latency = 10, + .power_usage = 50, + .target_residency = 100, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "MV CPU IDLE", + .desc = "CPU power down", + }, + .states[2] = { + .enter = armada_370_xp_enter_idle, + .exit_latency = 100, + .power_usage = 5, + .target_residency = 1000, + .flags = CPUIDLE_FLAG_TIME_VALID | + ARMADA_370_XP_FLAG_DEEP_IDLE, + .name = "MV CPU DEEP IDLE", + .desc = "CPU and L2 Fabric power down", + }, + .state_count = ARMADA_370_XP_MAX_STATES, +}; + +static int armada_370_xp_cpuidle_probe(struct platform_device *pdev) +{ + + armada_370_xp_cpu_suspend = (void *)(pdev->dev.platform_data); + return cpuidle_register(&armada_370_xp_idle_driver, NULL); +} + +static struct platform_driver armada_370_xp_cpuidle_plat_driver = { + .driver = { + .name = "cpuidle-armada-370-xp", + .owner = THIS_MODULE, + }, + .probe = armada_370_xp_cpuidle_probe, +}; + +module_platform_driver(armada_370_xp_cpuidle_plat_driver); + +MODULE_AUTHOR("Gregory CLEMENT "); +MODULE_DESCRIPTION("Armada 370/XP cpu idle driver"); +MODULE_LICENSE("GPL"); -- 1.8.1.2 From mboxrd@z Thu Jan 1 00:00:00 1970 From: gregory.clement@free-electrons.com (Gregory CLEMENT) Date: Fri, 28 Mar 2014 12:13:30 +0100 Subject: [PATCH v6 10/11] cpuidle: mvebu: Add initial CPU idle support for Armada 370/XP SoC In-Reply-To: <1396005211-15573-1-git-send-email-gregory.clement@free-electrons.com> References: <1396005211-15573-1-git-send-email-gregory.clement@free-electrons.com> Message-ID: <1396005211-15573-11-git-send-email-gregory.clement@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add the wfi, cpu idle and cpu deep idle power states support for the Armada XP SoCs. All the latencies and the power consumption values used at the "armada_370_xp_idle_driver" structure are preliminary and will be modified in the future after running some measurements and analysis. Based on the work of Nadav Haklai. Signed-off-by: Nadav Haklai Signed-off-by: Gregory CLEMENT --- drivers/cpuidle/Kconfig.arm | 5 ++ drivers/cpuidle/Makefile | 1 + drivers/cpuidle/cpuidle-armada-370-xp.c | 93 +++++++++++++++++++++++++++++++++ 3 files changed, 99 insertions(+) create mode 100644 drivers/cpuidle/cpuidle-armada-370-xp.c diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm index 97ccc31dbdd8..5bb94780d377 100644 --- a/drivers/cpuidle/Kconfig.arm +++ b/drivers/cpuidle/Kconfig.arm @@ -1,6 +1,11 @@ # # ARM CPU Idle drivers # +config ARM_ARMADA_370_XP_CPUIDLE + bool "CPU Idle Driver for Armada 370/XP family processors" + depends on ARCH_MVEBU + help + Select this to enable cpuidle on Armada 370/XP processors. config ARM_BIG_LITTLE_CPUIDLE bool "Support for ARM big.LITTLE processors" diff --git a/drivers/cpuidle/Makefile b/drivers/cpuidle/Makefile index f71ae1b373c5..9902d052bd87 100644 --- a/drivers/cpuidle/Makefile +++ b/drivers/cpuidle/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED) += coupled.o ################################################################################## # ARM SoC drivers +obj-$(CONFIG_ARM_ARMADA_370_XP_CPUIDLE) += cpuidle-armada-370-xp.o obj-$(CONFIG_ARM_BIG_LITTLE_CPUIDLE) += cpuidle-big_little.o obj-$(CONFIG_ARM_HIGHBANK_CPUIDLE) += cpuidle-calxeda.o obj-$(CONFIG_ARM_KIRKWOOD_CPUIDLE) += cpuidle-kirkwood.o diff --git a/drivers/cpuidle/cpuidle-armada-370-xp.c b/drivers/cpuidle/cpuidle-armada-370-xp.c new file mode 100644 index 000000000000..6b98608c222e --- /dev/null +++ b/drivers/cpuidle/cpuidle-armada-370-xp.c @@ -0,0 +1,93 @@ +/* + * Marvell Armada 370 and Armada XP SoC cpuidle driver + * + * Copyright (C) 2013 Marvell + * + * Nadav Haklai + * Gregory CLEMENT + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + * + * Maintainer: Gregory CLEMENT + */ + +#include +#include +#include +#include +#include +#include +#include + +#define ARMADA_370_XP_MAX_STATES 3 +#define ARMADA_370_XP_FLAG_DEEP_IDLE 0x10000 + +static int (*armada_370_xp_cpu_suspend)(int); + +static int armada_370_xp_enter_idle(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + int ret; + bool deepidle = false; + cpu_pm_enter(); + + if (drv->states[index].flags & ARMADA_370_XP_FLAG_DEEP_IDLE) + deepidle = true; + + ret = armada_370_xp_cpu_suspend(deepidle); + if (ret) + return ret; + + cpu_pm_exit(); + + return index; +} + +static struct cpuidle_driver armada_370_xp_idle_driver = { + .name = "armada_370_xp_idle", + .states[0] = ARM_CPUIDLE_WFI_STATE, + .states[1] = { + .enter = armada_370_xp_enter_idle, + .exit_latency = 10, + .power_usage = 50, + .target_residency = 100, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "MV CPU IDLE", + .desc = "CPU power down", + }, + .states[2] = { + .enter = armada_370_xp_enter_idle, + .exit_latency = 100, + .power_usage = 5, + .target_residency = 1000, + .flags = CPUIDLE_FLAG_TIME_VALID | + ARMADA_370_XP_FLAG_DEEP_IDLE, + .name = "MV CPU DEEP IDLE", + .desc = "CPU and L2 Fabric power down", + }, + .state_count = ARMADA_370_XP_MAX_STATES, +}; + +static int armada_370_xp_cpuidle_probe(struct platform_device *pdev) +{ + + armada_370_xp_cpu_suspend = (void *)(pdev->dev.platform_data); + return cpuidle_register(&armada_370_xp_idle_driver, NULL); +} + +static struct platform_driver armada_370_xp_cpuidle_plat_driver = { + .driver = { + .name = "cpuidle-armada-370-xp", + .owner = THIS_MODULE, + }, + .probe = armada_370_xp_cpuidle_probe, +}; + +module_platform_driver(armada_370_xp_cpuidle_plat_driver); + +MODULE_AUTHOR("Gregory CLEMENT "); +MODULE_DESCRIPTION("Armada 370/XP cpu idle driver"); +MODULE_LICENSE("GPL"); -- 1.8.1.2