From patchwork Wed Aug 28 09:11:43 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiyi Lu X-Patchwork-Id: 11118347 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A11E51398 for ; Wed, 28 Aug 2019 09:13:15 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8038A2339E for ; Wed, 28 Aug 2019 09:13:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="BiPZgEi8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8038A2339E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=aCnJQdXJ1tqGEJtG4lgH5XkDHdyc4ZcybeE2QB8m+Po=; b=BiPZgEi8Qdflpl vNdKRMZIr1w/k91rQQZHaJe2o1xIXe1VMTwUhY6OSW+cU6ErX1aM/GGD6r41Y/eApRe+gU1Gu1s5t u1jlPidC9qkIKN0RmTzyHKWoD1FUKRMZ0XWuHVg3D+E2hkD0Pprw78LP1EHUGhBe7wX2I8wa8T+/i HMplDhzni3pFyv3ZdC8GKftb4YKkwYAuCBWXhNCEayXANhy9xYjMGY0Gu49I31X5vfopldU6DRav5 JFGgE+3POYQYfBswxQwdjfuaZyTyZVcRPnIvUQDfG+6Pfc22llO7Iqoq/YuteCayJXmn3e+FGApqC IgWOiO4ASV3Wf50qUQJw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i2u0x-0003Vo-22; Wed, 28 Aug 2019 09:13:15 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i2tzo-0002UC-GW; Wed, 28 Aug 2019 09:12:06 +0000 X-UUID: f57a4ec72f884627932db13fb528a09a-20190828 X-UUID: f57a4ec72f884627932db13fb528a09a-20190828 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1054326887; Wed, 28 Aug 2019 01:12:07 -0800 Received: from MTKMBS07N2.mediatek.inc (172.21.101.141) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 28 Aug 2019 02:12:06 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs07n2.mediatek.inc (172.21.101.141) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 28 Aug 2019 17:12:05 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 28 Aug 2019 17:12:05 +0800 From: Weiyi Lu To: Nicolas Boichat , Matthias Brugger , Rob Herring Subject: [PATCH v7 10/13] soc: mediatek: Add subsys clock control for bus protection Date: Wed, 28 Aug 2019 17:11:43 +0800 Message-ID: <1566983506-26598-11-git-send-email-weiyi.lu@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1566983506-26598-1-git-send-email-weiyi.lu@mediatek.com> References: <1566983506-26598-1-git-send-email-weiyi.lu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190828_021204_631620_368792C3 X-CRM114-Status: GOOD ( 15.36 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [216.200.240.184 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: James Liao , Weiyi Lu , srv_heupstream@mediatek.com, linux-kernel@vger.kernel.org, Fan Chen , linux-mediatek@lists.infradead.org, Yong Wu , linux-arm-kernel@lists.infradead.org Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org Add subsys CG control flow before/after the bus protect control due to bus protection need SMI bus relative CGs enabled to feedback its ack. Signed-off-by: Weiyi Lu --- drivers/soc/mediatek/mtk-scpsys.c | 72 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 70 insertions(+), 2 deletions(-) diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c index f25101f..33c4034 100644 --- a/drivers/soc/mediatek/mtk-scpsys.c +++ b/drivers/soc/mediatek/mtk-scpsys.c @@ -108,6 +108,7 @@ enum clk_id { }; #define MAX_CLKS 3 +#define MAX_SUBSYS_CLKS 10 /** * struct scp_domain_data - scp domain data for power on/off flow @@ -120,6 +121,8 @@ enum clk_id { * @clk_id: The basic clocks required by this power domain. * @basic_clk_id: provide the same purpose with field "clk_id" * by declaring basic clock prefix name rather than clk_id. + * @subsys_clk_prefix: The prefix name of the clocks need to be enabled + * before releasing bus protection. * @caps: The flag for active wake-up action. * @bp_table: The mask table for multiple step bus protection. */ @@ -132,6 +135,7 @@ struct scp_domain_data { u32 bus_prot_mask; enum clk_id clk_id[MAX_CLKS]; const char *basic_clk_id[MAX_CLKS]; + const char *subsys_clk_prefix; u8 caps; struct bus_prot bp_table[MAX_STEPS]; }; @@ -142,6 +146,7 @@ struct scp_domain { struct generic_pm_domain genpd; struct scp *scp; struct clk *clk[MAX_CLKS]; + struct clk *subsys_clk[MAX_SUBSYS_CLKS]; const struct scp_domain_data *data; struct regulator *supply; }; @@ -347,16 +352,22 @@ static int scpsys_power_on(struct generic_pm_domain *genpd) val |= PWR_RST_B_BIT; writel(val, ctl_addr); - ret = scpsys_sram_enable(scpd, ctl_addr); + ret = scpsys_clk_enable(scpd->subsys_clk, MAX_SUBSYS_CLKS); if (ret < 0) goto err_pwr_ack; + ret = scpsys_sram_enable(scpd, ctl_addr); + if (ret < 0) + goto err_sram; + ret = scpsys_bus_protect_disable(scpd); if (ret < 0) - goto err_pwr_ack; + goto err_sram; return 0; +err_sram: + scpsys_clk_disable(scpd->subsys_clk, MAX_SUBSYS_CLKS); err_pwr_ack: scpsys_clk_disable(scpd->clk, MAX_CLKS); err_clk: @@ -383,6 +394,8 @@ static int scpsys_power_off(struct generic_pm_domain *genpd) if (ret < 0) goto out; + scpsys_clk_disable(scpd->subsys_clk, MAX_SUBSYS_CLKS); + /* subsys power off */ val = readl(ctl_addr) | PWR_ISO_BIT; writel(val, ctl_addr); @@ -419,6 +432,48 @@ static int scpsys_power_off(struct generic_pm_domain *genpd) return ret; } +static int init_subsys_clks(struct platform_device *pdev, + const char *prefix, struct clk **clk) +{ + struct device_node *node = pdev->dev.of_node; + u32 prefix_len, sub_clk_cnt = 0; + struct property *prop; + const char *clk_name; + + if (!node) { + dev_err(&pdev->dev, "Cannot find scpsys node: %ld\n", + PTR_ERR(node)); + return PTR_ERR(node); + } + + prefix_len = strlen(prefix); + + of_property_for_each_string(node, "clock-names", prop, clk_name) { + if (!strncmp(clk_name, prefix, prefix_len) && + (clk_name[prefix_len] == '-')) { + if (sub_clk_cnt >= MAX_SUBSYS_CLKS) { + dev_err(&pdev->dev, + "subsys clk out of range %d\n", + sub_clk_cnt); + return -ENOMEM; + } + + clk[sub_clk_cnt] = devm_clk_get(&pdev->dev, + clk_name); + + if (IS_ERR(clk)) { + dev_err(&pdev->dev, + "Subsys clk read fail %ld\n", + PTR_ERR(clk)); + return PTR_ERR(clk); + } + sub_clk_cnt++; + } + } + + return sub_clk_cnt; +} + static void init_clks(struct platform_device *pdev, struct clk **clk) { int i; @@ -506,6 +561,7 @@ static struct scp *init_scp(struct platform_device *pdev, struct scp_domain *scpd = &scp->domains[i]; struct generic_pm_domain *genpd = &scpd->genpd; const struct scp_domain_data *data = &scp_domain_data[i]; + int clk_cnt; pd_data->domains[i] = genpd; scpd->scp = scp; @@ -534,6 +590,18 @@ static struct scp *init_scp(struct platform_device *pdev, data->basic_clk_id[j]); } + if (data->subsys_clk_prefix) { + clk_cnt = init_subsys_clks(pdev, + data->subsys_clk_prefix, + scpd->subsys_clk); + if (clk_cnt < 0) { + dev_err(&pdev->dev, + "%s: subsys clk unavailable\n", + data->name); + return ERR_PTR(clk_cnt); + } + } + genpd->name = data->name; genpd->power_off = scpsys_power_off; genpd->power_on = scpsys_power_on;