From patchwork Thu Jun 13 10:08:43 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rajendra Nayak X-Patchwork-Id: 2715351 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 52DCDC1459 for ; Thu, 13 Jun 2013 10:09:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3318B201DB for ; Thu, 13 Jun 2013 10:09:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EB23D201DA for ; Thu, 13 Jun 2013 10:09:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758477Ab3FMKJb (ORCPT ); Thu, 13 Jun 2013 06:09:31 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:45740 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756060Ab3FMKJb (ORCPT ); Thu, 13 Jun 2013 06:09:31 -0400 Received: from dbdlxv05.itg.ti.com ([172.24.171.60]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id r5DA96eI028948; Thu, 13 Jun 2013 05:09:06 -0500 Received: from DBDE72.ent.ti.com (dbde72.ent.ti.com [172.24.171.97]) by dbdlxv05.itg.ti.com (8.14.3/8.13.8) with ESMTP id r5DA94JO023232; Thu, 13 Jun 2013 05:09:04 -0500 Received: from dbdp33.itg.ti.com (172.24.170.252) by DBDE72.ent.ti.com (172.24.171.97) with Microsoft SMTP Server id 14.2.342.3; Thu, 13 Jun 2013 18:09:03 +0800 Received: from ula0131687.apr.dhcp.ti.com (smtpvbd.itg.ti.com [172.24.170.250]) by dbdp33.itg.ti.com (8.13.8/8.13.8) with ESMTP id r5DA8v1r029205; Thu, 13 Jun 2013 15:39:03 +0530 From: Rajendra Nayak To: CC: , , Rajendra Nayak Subject: [PATCH 1/2] ARM: OMAP2+: Powerdomain: Remove the need to always have a voltdm associated to a pwrdm Date: Thu, 13 Jun 2013 15:38:43 +0530 Message-ID: <1371118124-15910-2-git-send-email-rnayak@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1371118124-15910-1-git-send-email-rnayak@ti.com> References: <1371118124-15910-1-git-send-email-rnayak@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The powerdomain framework expects all powerdomains to be associated with a corresponding voltagedomain. For some SoCs' (like the already existing AM33xx family, or for the upcoming AM437x and DRA7 SoCs') which do not have a Voltage controller/Voltage Processor (neither the SR I2C bus to communicate with the PMIC) there is no need for a Powerdomain to have a voltage domain association (since they are really non scaleable, even though the voltage domains exist in place). Extend the arch operations to add an api which the powerdomain core can then use to identify if a voltdm lookup and association for a powerdomain is really needed. Signed-off-by: Rajendra Nayak --- arch/arm/mach-omap2/powerdomain.c | 5 +++++ arch/arm/mach-omap2/powerdomain.h | 2 ++ 2 files changed, 7 insertions(+) diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c index 86babd7..e233dfc 100644 --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -102,6 +102,10 @@ static int _pwrdm_register(struct powerdomain *pwrdm) if (_pwrdm_lookup(pwrdm->name)) return -EEXIST; + if (arch_pwrdm && arch_pwrdm->pwrdm_has_voltdm) + if (!arch_pwrdm->pwrdm_has_voltdm()) + goto skip_voltdm; + voltdm = voltdm_lookup(pwrdm->voltdm.name); if (!voltdm) { pr_err("powerdomain: %s: voltagedomain %s does not exist\n", @@ -111,6 +115,7 @@ static int _pwrdm_register(struct powerdomain *pwrdm) pwrdm->voltdm.ptr = voltdm; INIT_LIST_HEAD(&pwrdm->voltdm_node); voltdm_add_pwrdm(voltdm, pwrdm); +skip_voltdm: spin_lock_init(&pwrdm->_lock); list_add(&pwrdm->node, &pwrdm_list); diff --git a/arch/arm/mach-omap2/powerdomain.h b/arch/arm/mach-omap2/powerdomain.h index 140c360..8ed89de 100644 --- a/arch/arm/mach-omap2/powerdomain.h +++ b/arch/arm/mach-omap2/powerdomain.h @@ -166,6 +166,7 @@ struct powerdomain { * @pwrdm_disable_hdwr_sar: Disable Hardware Save-Restore feature for a pd * @pwrdm_set_lowpwrstchange: Enable pd transitions from a shallow to deep sleep * @pwrdm_wait_transition: Wait for a pd state transition to complete + * @pwrdm_has_voltdmi: Check if a voltdm association is needed * * Regarding @pwrdm_set_lowpwrstchange: On the OMAP2 and 3-family * chips, a powerdomain's power state is not allowed to directly @@ -196,6 +197,7 @@ struct pwrdm_ops { int (*pwrdm_disable_hdwr_sar)(struct powerdomain *pwrdm); int (*pwrdm_set_lowpwrstchange)(struct powerdomain *pwrdm); int (*pwrdm_wait_transition)(struct powerdomain *pwrdm); + int (*pwrdm_has_voltdm)(void); }; int pwrdm_register_platform_funcs(struct pwrdm_ops *custom_funcs);