From patchwork Mon Feb 27 04:47:42 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob X-Patchwork-Id: 6947 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id 1E1FB23E01 for ; Mon, 27 Feb 2012 04:48:19 +0000 (UTC) Received: from mail-iy0-f180.google.com (mail-iy0-f180.google.com [209.85.210.180]) by fiordland.canonical.com (Postfix) with ESMTP id DB4EEA185F5 for ; Mon, 27 Feb 2012 04:48:18 +0000 (UTC) Received: by mail-iy0-f180.google.com with SMTP id z7so7824105iab.11 for ; Sun, 26 Feb 2012 20:48:18 -0800 (PST) Received: from mr.google.com ([10.43.52.74]) by 10.43.52.74 with SMTP id vl10mr12179098icb.55.1330318098682 (num_hops = 1); Sun, 26 Feb 2012 20:48:18 -0800 (PST) Received: by 10.43.52.74 with SMTP id vl10mr9860795icb.55.1330318098635; Sun, 26 Feb 2012 20:48:18 -0800 (PST) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.231.11.10 with SMTP id r10csp57814ibr; Sun, 26 Feb 2012 20:48:18 -0800 (PST) Received: by 10.236.184.196 with SMTP id s44mr14496315yhm.9.1330318097766; Sun, 26 Feb 2012 20:48:17 -0800 (PST) Received: from mail-gx0-f178.google.com (mail-gx0-f178.google.com [209.85.161.178]) by mx.google.com with ESMTPS id l14si6153377ank.12.2012.02.26.20.48.17 (version=TLSv1/SSLv3 cipher=OTHER); Sun, 26 Feb 2012 20:48:17 -0800 (PST) Received-SPF: neutral (google.com: 209.85.161.178 is neither permitted nor denied by best guess record for domain of rob.lee@linaro.org) client-ip=209.85.161.178; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.161.178 is neither permitted nor denied by best guess record for domain of rob.lee@linaro.org) smtp.mail=rob.lee@linaro.org Received: by mail-gx0-f178.google.com with SMTP id i4so2137730ggm.37 for ; Sun, 26 Feb 2012 20:48:17 -0800 (PST) Received-SPF: pass (google.com: domain of rob.lee@linaro.org designates 10.236.37.132 as permitted sender) client-ip=10.236.37.132; Received: from mr.google.com ([10.236.37.132]) by 10.236.37.132 with SMTP id y4mr19216887yha.10.1330318097605 (num_hops = 1); Sun, 26 Feb 2012 20:48:17 -0800 (PST) MIME-Version: 1.0 Received: by 10.236.37.132 with SMTP id y4mr14309454yha.10.1330318095010; Sun, 26 Feb 2012 20:48:15 -0800 (PST) Received: from b18647-20 ([67.23.168.6]) by mx.google.com with ESMTPS id w44sm35245363yhk.17.2012.02.26.20.48.12 (version=SSLv3 cipher=OTHER); Sun, 26 Feb 2012 20:48:14 -0800 (PST) From: Robert Lee To: len.brown@intel.com, khilman@ti.com Cc: robherring2@gmail.com, Baohua.Song@csr.com, amit.kucheria@linaro.org, nicolas.ferre@atmel.com, linux@maxim.org.za, kgene.kim@samsung.com, amit.kachhap@linaro.org, magnus.damm@gmail.com, nsekhar@ti.com, daniel.lezcano@linaro.org, mturquette@linaro.org, vincent.guittot@linaro.org, arnd.bergmann@linaro.org, linux-arm-kernel@lists.infradead.org, linaro-dev@lists.linaro.org, patches@linaro.org, deepthi@linux.vnet.ibm.com, broonie@opensource.wolfsonmicro.com, nicolas.pitre@linaro.org, linux@arm.linux.org.uk, jean.pihet@newoldbits.com Subject: [PATCH v5 8/9] ARM: kirkwood: Consolidate cpuidle functionality Date: Sun, 26 Feb 2012 22:47:42 -0600 Message-Id: <1330318063-25460-9-git-send-email-rob.lee@linaro.org> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1330318063-25460-1-git-send-email-rob.lee@linaro.org> References: <1330318063-25460-1-git-send-email-rob.lee@linaro.org> X-Gm-Message-State: ALoCoQmXv2F/2eavlmISTXRx37oUcx9dYX+8n3WUwNjnhiqsLNBcBYeIyfVHL8RaC8JUxJsLFy0s Use newly added core cpuidle functionality and remove this duplicated code from the platform cpuidle. Signed-off-by: Robert Lee --- arch/arm/mach-kirkwood/cpuidle.c | 71 +++++++++++--------------------------- 1 files changed, 20 insertions(+), 51 deletions(-) diff --git a/arch/arm/mach-kirkwood/cpuidle.c b/arch/arm/mach-kirkwood/cpuidle.c index 7088180..261a2a8 100644 --- a/arch/arm/mach-kirkwood/cpuidle.c +++ b/arch/arm/mach-kirkwood/cpuidle.c @@ -24,73 +24,42 @@ #define KIRKWOOD_MAX_STATES 2 -static struct cpuidle_driver kirkwood_idle_driver = { - .name = "kirkwood_idle", - .owner = THIS_MODULE, -}; - -static DEFINE_PER_CPU(struct cpuidle_device, kirkwood_cpuidle_device); - /* Actual code that puts the SoC in different idle states */ static int kirkwood_enter_idle(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) { - struct timeval before, after; - int idle_time; - - local_irq_disable(); - do_gettimeofday(&before); - if (index == 0) - /* Wait for interrupt state */ - cpu_do_idle(); - else if (index == 1) { - /* - * Following write will put DDR in self refresh. - * Note that we have 256 cycles before DDR puts it - * self in self-refresh, so the wait-for-interrupt - * call afterwards won't get the DDR from self refresh - * mode. - */ - writel(0x7, DDR_OPERATION_BASE); - cpu_do_idle(); - } - do_gettimeofday(&after); - local_irq_enable(); - idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC + - (after.tv_usec - before.tv_usec); - - /* Update last residency */ - dev->last_residency = idle_time; + writel(0x7, DDR_OPERATION_BASE); + cpu_do_idle(); return index; } +static struct cpuidle_driver kirkwood_idle_driver = { + .name = "kirkwood_idle", + .owner = THIS_MODULE, + .en_core_tk_irqen = 1, + .states[0] = CPUIDLE_ARM_WFI_STATE, + .states[1] = { + .enter = kirkwood_enter_idle, + .exit_latency = 10, + .target_residency = 100000, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "DDR SR", + .desc = "WFI and DDR Self Refresh", + }, + .state_count = KIRKWOOD_MAX_STATES, +}; + +static DEFINE_PER_CPU(struct cpuidle_device, kirkwood_cpuidle_device); + /* Initialize CPU idle by registering the idle states */ static int kirkwood_init_cpuidle(void) { struct cpuidle_device *device; - struct cpuidle_driver *driver = &kirkwood_idle_driver; device = &per_cpu(kirkwood_cpuidle_device, smp_processor_id()); device->state_count = KIRKWOOD_MAX_STATES; - driver->state_count = KIRKWOOD_MAX_STATES; - - /* Wait for interrupt state */ - driver->states[0].enter = kirkwood_enter_idle; - driver->states[0].exit_latency = 1; - driver->states[0].target_residency = 10000; - driver->states[0].flags = CPUIDLE_FLAG_TIME_VALID; - strcpy(driver->states[0].name, "WFI"); - strcpy(driver->states[0].desc, "Wait for interrupt"); - - /* Wait for interrupt and DDR self refresh state */ - driver->states[1].enter = kirkwood_enter_idle; - driver->states[1].exit_latency = 10; - driver->states[1].target_residency = 10000; - driver->states[1].flags = CPUIDLE_FLAG_TIME_VALID; - strcpy(driver->states[1].name, "DDR SR"); - strcpy(driver->states[1].desc, "WFI and DDR Self Refresh"); cpuidle_register_driver(&kirkwood_idle_driver); if (cpuidle_register_device(device)) {