From patchwork Mon Jan 26 10:08:16 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenyou Yang X-Patchwork-Id: 5707751 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 8A7C89F333 for ; Mon, 26 Jan 2015 10:13:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8C70120131 for ; Mon, 26 Jan 2015 10:13:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9D17A20123 for ; Mon, 26 Jan 2015 10:13:29 +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 1YFgdj-0000vu-RZ; Mon, 26 Jan 2015 10:11:27 +0000 Received: from eusmtp01.atmel.com ([212.144.249.242]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YFgd1-0000UA-UH for linux-arm-kernel@lists.infradead.org; Mon, 26 Jan 2015 10:10:45 +0000 Received: from apsmtp01.atmel.com (10.168.254.30) by eusmtp01.atmel.com (10.161.101.30) with Microsoft SMTP Server id 14.2.347.0; Mon, 26 Jan 2015 11:10:19 +0100 Received: from shaarm01.corp.atmel.com (10.168.254.13) by apsmtp01.corp.atmel.com (10.168.254.30) with Microsoft SMTP Server id 14.2.347.0; Mon, 26 Jan 2015 18:11:51 +0800 From: Wenyou Yang To: , Subject: [PATCH 6/7] pm: at91: add achieve the mpddrc peripheral ID and the DDR clock ID support Date: Mon, 26 Jan 2015 18:08:16 +0800 Message-ID: <1422266896-24666-1-git-send-email-wenyou.yang@atmel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1422266617-24381-1-git-send-email-wenyou.yang@atmel.com> References: <1422266617-24381-1-git-send-email-wenyou.yang@atmel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150126_021044_394143_F95E43D7 X-CRM114-Status: UNSURE ( 9.80 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.7 (/) Cc: sylvain.rochet@finsecur.com, Patrice.VILCHEZ@atmel.com, linux-kernel@vger.kernel.org, wenyou.yang@atmel.com, alexandre.belloni@free-electrons.com, peda@axentia.se, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_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 patch achieves the mpddr controller peripheral ID and the DDR clock ID from the dts file. They will be used in the future to disable the mpddr controller'c clock the and DDR clock to decrease the power consumption during suspending. Signed-off-by: Wenyou Yang --- arch/arm/mach-at91/generic.h | 2 ++ arch/arm/mach-at91/setup.c | 24 ++++++++++++++++++++++++ 2 files changed, 26 insertions(+) diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h index 41796bf..3c72a3e 100644 --- a/arch/arm/mach-at91/generic.h +++ b/arch/arm/mach-at91/generic.h @@ -47,6 +47,8 @@ void __init at91_sam9x5_pm_init(void) { } struct at91_pm_struct { unsigned long uhp_udp_mask; int memctrl; + u32 mpddrc_id[2]; + u32 ddrck_id; }; #endif /* _AT91_GENERIC_H */ diff --git a/arch/arm/mach-at91/setup.c b/arch/arm/mach-at91/setup.c index 7924663..a306f95 100644 --- a/arch/arm/mach-at91/setup.c +++ b/arch/arm/mach-at91/setup.c @@ -363,6 +363,27 @@ void __init at91_ioremap_matrix(u32 base_addr) panic(pr_fmt("Impossible to ioremap at91_matrix_base\n")); } +static u32 at91_of_get_ddr_id(struct device_node *np, char *name) +{ + struct of_phandle_args clkspec; + u32 id; + int index; + int rc; + + index = of_property_match_string(np, "clock-names", name); + rc = of_parse_phandle_with_args(np, "clocks", "#clock-cells", index, &clkspec); + if (rc) + return 0; + + rc = of_property_read_u32(clkspec.np, "reg", &id); + if (rc) + return 0; + + of_node_put(clkspec.np); + + return id; +} + struct at91_ramc_of_data { u8 ramc_type; }; @@ -400,6 +421,9 @@ static void at91_dt_ramc(void) of_data = of_id->data; at91_pm_data.memctrl = of_data->ramc_type; + at91_pm_data.mpddrc_id[idx] = at91_of_get_ddr_id(np, "mpddr"); + at91_pm_data.ddrck_id = at91_of_get_ddr_id(np, "ddrck"); + idx++; }