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[199.106.103.254]) by mx.google.com with ESMTPSA id pm9sm6639462pdb.59.2015.03.09.08.17.18 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 09 Mar 2015 08:17:19 -0700 (PDT) From: Lina Iyer To: daniel.lezcano@linaro.org, khilman@linaro.org, sboyd@codeaurora.org, galak@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: lorenzo.pieralisi@arm.com, msivasub@codeaurora.org, devicetree@vger.kernel.org, Lina Iyer Subject: [RFC PATCH v15 01/11] ARM: cpuidle: Register per cpuidle device Date: Mon, 9 Mar 2015 09:16:36 -0600 Message-Id: <1425914206-22295-2-git-send-email-lina.iyer@linaro.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1425914206-22295-1-git-send-email-lina.iyer@linaro.org> References: <1425914206-22295-1-git-send-email-lina.iyer@linaro.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: lina.iyer@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.215.43 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , From: Daniel Lezcano Some architectures have some cpus which does not support idle states. Let the underlying low level code to return -ENOSYS when it is not possible to set an idle state. Signed-off-by: Daniel Lezcano Signed-off-by: Lina Iyer [Minor clean ups and fixes of the per-cpu variable] --- drivers/cpuidle/cpuidle-arm.c | 34 +++++++++++++++++++++++++++++++++- 1 file changed, 33 insertions(+), 1 deletion(-) diff --git a/drivers/cpuidle/cpuidle-arm.c b/drivers/cpuidle/cpuidle-arm.c index 1c94b88..f7cdb73 100644 --- a/drivers/cpuidle/cpuidle-arm.c +++ b/drivers/cpuidle/cpuidle-arm.c @@ -17,11 +17,14 @@ #include #include #include +#include #include #include "dt_idle_states.h" +static DEFINE_PER_CPU(struct cpuidle_device, *cpuidle_arm_dev); + /* * arm_enter_idle_state - Programs CPU to enter the specified state * @@ -93,6 +96,7 @@ static const struct of_device_id arm_idle_state_match[] __initconst = { static int __init arm_idle_init(void) { int cpu, ret; + struct cpuidle_device *dev; struct cpuidle_driver *drv = &arm_idle_driver; /* @@ -105,18 +109,46 @@ static int __init arm_idle_init(void) if (ret <= 0) return ret ? : -ENODEV; + + ret = cpuidle_register_driver(drv); + if (ret) { + pr_err("Failed to register cpuidle driver\n"); + return ret; + } + /* * Call arch CPU operations in order to initialize * idle states suspend back-end specific data */ for_each_possible_cpu(cpu) { + ret = arm_cpuidle_init(cpu); + /* + * This cpu does not support any idle states + */ + if (ret == -ENOSYS) + continue; + if (ret) { pr_err("CPU %d failed to init idle CPU ops\n", cpu); return ret; } + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; + + dev->cpu = cpu; + ret = cpuidle_register_device(dev); + if (ret) { + pr_err("Failed to register cpuidle device for CPU %d\n", + cpu); + return ret; + } + + per_cpu(cpuidle_arm_dev, cpu) = dev; } - return cpuidle_register(drv, NULL); + return 0; } device_initcall(arm_idle_init);