From patchwork Tue Jul 28 09:33:57 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rajendra Nayak X-Patchwork-Id: 6881481 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 535DE9F380 for ; Tue, 28 Jul 2015 09:38:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 64D5B20612 for ; Tue, 28 Jul 2015 09:38:25 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8158E20527 for ; Tue, 28 Jul 2015 09:38:24 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZK1JH-0002Di-43; Tue, 28 Jul 2015 09:36:31 +0000 Received: from smtp.codeaurora.org ([198.145.29.96]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZK1IK-0001Sr-FS for linux-arm-kernel@lists.infradead.org; Tue, 28 Jul 2015 09:35:33 +0000 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id 8AD291412DA; Tue, 28 Jul 2015 09:35:12 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 486) id 730791412E4; Tue, 28 Jul 2015 09:35:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-5.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from blr-ubuntu-34.ap.qualcomm.com (unknown [202.46.23.61]) (using TLSv1.1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: rnayak@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id CAA4E1412DA; Tue, 28 Jul 2015 09:35:07 +0000 (UTC) From: Rajendra Nayak To: sboyd@codeaurora.org, mturquette@baylibre.com Subject: [PATCH v7 04/13] clk: qcom: gdsc: Manage clocks with !CONFIG_PM Date: Tue, 28 Jul 2015 15:03:57 +0530 Message-Id: <1438076046-4706-5-git-send-email-rnayak@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1438076046-4706-1-git-send-email-rnayak@codeaurora.org> References: <1438076046-4706-1-git-send-email-rnayak@codeaurora.org> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150728_023532_630726_7A44F42A X-CRM114-Status: GOOD ( 13.81 ) X-Spam-Score: -3.2 (---) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rajendra Nayak , linux-pm@vger.kernel.org, linux-arm-msm@vger.kernel.org, svarbanov@mm-sol.com, srinivas.kandagatla@linaro.org, sviau@codeaurora.org, georgi.djakov@linaro.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP With CONFIG_PM disabled, turn the devices clocks on during driver binding to the device, and turn them off when the driver is unbound from the device. Signed-off-by: Rajendra Nayak --- drivers/clk/qcom/gdsc.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c index 68b810a..c7f109b 100644 --- a/drivers/clk/qcom/gdsc.c +++ b/drivers/clk/qcom/gdsc.c @@ -12,10 +12,12 @@ */ #include +#include #include #include #include #include +#include #include #include #include @@ -211,3 +213,72 @@ void gdsc_unregister(struct device *dev) { of_genpd_del_provider(dev->of_node); } + +#ifndef CONFIG_PM +struct gdsc_notifier_block { + struct notifier_block nb; + const char *con_ids[]; +}; + +static void enable_clock(struct device *dev, const char *con_id) +{ + struct clk *clk; + + clk = clk_get(dev, con_id); + if (!IS_ERR(clk)) { + clk_prepare_enable(clk); + clk_put(clk); + } +} + +static void disable_clock(struct device *dev, const char *con_id) +{ + struct clk *clk; + + clk = clk_get(dev, con_id); + if (!IS_ERR(clk)) { + clk_disable_unprepare(clk); + clk_put(clk); + } +} + +static int clk_notify(struct notifier_block *nb, unsigned long action, + void *data) +{ + int sz; + struct device *dev = data; + const char **con_id; + struct gdsc_notifier_block *gdsc_nb; + + if (!of_find_property(dev->of_node, "power-domains", &sz)) + return 0; + + gdsc_nb = container_of(nb, struct gdsc_notifier_block, nb); + + if (!gdsc_nb->con_ids[0]) + return 0; + + switch (action) { + case BUS_NOTIFY_BIND_DRIVER: + for (con_id = gdsc_nb->con_ids; *con_id; con_id++) + enable_clock(dev, *con_id); + break; + case BUS_NOTIFY_UNBOUND_DRIVER: + for (con_id = gdsc_nb->con_ids; *con_id; con_id++) + disable_clock(dev, *con_id); + break; + } + return 0; +} + +static struct gdsc_notifier_block gdsc_nb = { + .nb.notifier_call = clk_notify, + .con_ids = { NULL }, +}; + +static __init int qcom_pm_runtime_init(void) +{ + return bus_register_notifier(&platform_bus_type, &gdsc_nb.nb); +} +core_initcall(qcom_pm_runtime_init); +#endif