From patchwork Tue Mar 19 08:01:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiyi Lu X-Patchwork-Id: 10858929 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C926A17E9 for ; Tue, 19 Mar 2019 08:03:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A8A1C2875C for ; Tue, 19 Mar 2019 08:03:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9D240295C7; Tue, 19 Mar 2019 08:03:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2A6EF2875C for ; Tue, 19 Mar 2019 08:03:00 +0000 (UTC) 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=RG0fTXYy4Klv4WBHBvW0kf0Ue2Ftw2qbdmq/FRqzrPE=; b=OlB5/FEaOr9JzY KBgmQtObsfVd6Jj9y6oc1XE4rlkgb/R06HKwOD2unCIRupEnIT+2GeX/rrf6dhUrIzf3LTGAbQd5n CHVuJDvZ0aAqdp1Rzqj3nlbh4K9Agx1seb+ot0fJaaRmBGV6VJ5mAt8gHCyJUD0Ctq1jmlVrmYOFz NAOEifwJYzZvIy/mVTdnhDWAFiv7iTg6j37/U79kzQa1mu8vw6r6G+ReThWqWqKq5IDZLkfTR1rrf RSRNVUERoO6M5Mqa6085Nu6F1lFHI+c2qcUoPbtobsqUeSWUVufEa46taa07lpZXrPXMhn6c3EQs3 MVtQrgKrfgnq5eDmu3jA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h69i6-0007vQ-5A; Tue, 19 Mar 2019 08:02:58 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h69hQ-00075c-Lq; Tue, 19 Mar 2019 08:02:19 +0000 X-UUID: 72f2cbb71e9f401a98dfddfedf215892-20190319 X-UUID: 72f2cbb71e9f401a98dfddfedf215892-20190319 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 987327970; Tue, 19 Mar 2019 00:01:59 -0800 Received: from MTKMBS01N1.mediatek.inc (172.21.101.68) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 19 Mar 2019 01:01:58 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs01n1.mediatek.inc (172.21.101.68) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 19 Mar 2019 16:01:58 +0800 Received: from mtkslt210.mediatek.inc (10.21.14.14) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Tue, 19 Mar 2019 16:01:57 +0800 From: Weiyi Lu To: Nicolas Boichat , Matthias Brugger , Rob Herring Subject: [PATCH v5 11/14] soc: mediatek: Add subsys clock control for bus protection Date: Tue, 19 Mar 2019 16:01:37 +0800 Message-ID: <20190319080140.24055-12-weiyi.lu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20190319080140.24055-1-weiyi.lu@mediatek.com> References: <20190319080140.24055-1-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-20190319_010216_721465_0CD27A53 X-CRM114-Status: GOOD ( 15.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 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, linux-arm-kernel@lists.infradead.org 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 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 181bf7bce591..356ca2626b36 100644 --- a/drivers/soc/mediatek/mtk-scpsys.c +++ b/drivers/soc/mediatek/mtk-scpsys.c @@ -108,6 +108,7 @@ static const char * const clk_names[] = { }; #define MAX_CLKS 3 +#define MAX_SUBSYS_CLKS 10 /** * struct scp_domain_data - scp domain data for power on/off flow @@ -121,6 +122,8 @@ static const char * const clk_names[] = { * power domains. * @basic_clk_name: 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. */ @@ -133,6 +136,7 @@ struct scp_domain_data { u32 bus_prot_mask; enum clk_id clk_id[MAX_CLKS]; const char *basic_clk_name[MAX_CLKS]; + const char *subsys_clk_prefix; u8 caps; struct bus_prot bp_table[MAX_STEPS]; }; @@ -143,6 +147,7 @@ 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; }; @@ -361,16 +366,22 @@ 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: @@ -397,6 +408,8 @@ 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); @@ -433,6 +446,48 @@ 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; @@ -520,6 +575,7 @@ 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; @@ -546,6 +602,18 @@ static struct scp *init_scp(struct platform_device *pdev, data->basic_clk_name[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;