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Thu, 06 Aug 2020 01:32:05 -0800 Received: from MTKMBS07N2.mediatek.inc (172.21.101.141) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 6 Aug 2020 02:22:03 -0700 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs07n2.mediatek.inc (172.21.101.141) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 6 Aug 2020 17:21:59 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 6 Aug 2020 17:21:59 +0800 From: Weiyi Lu To: Enric Balletbo Serra , Matthias Brugger , Nicolas Boichat , "Rob Herring" , Sascha Hauer Subject: [PATCH v17 06/12] soc: mediatek: Add support for hierarchical scpsys device node Date: Thu, 6 Aug 2020 17:21:49 +0800 Message-ID: <1596705715-15320-7-git-send-email-weiyi.lu@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1596705715-15320-1-git-send-email-weiyi.lu@mediatek.com> References: <1596705715-15320-1-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-20200806_053210_884641_0F58A794 X-CRM114-Status: GOOD ( 20.30 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-arm-kernel@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, devicetree@vger.kernel.org, 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 Try to list all the power domains of under power controller node to show the dependency between each power domain directly instead of filling the dependency in scp_soc_data. And could be more clearly to group subsys clocks into power domain sub node to introduce subsys clocks of bus protection in next patch. Signed-off-by: Weiyi Lu --- drivers/soc/mediatek/mtk-scpsys.c | 103 +++++++++++++++++++++++++++++++++++--- 1 file changed, 95 insertions(+), 8 deletions(-) diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c index 5a2c323..502b66f 100644 --- a/drivers/soc/mediatek/mtk-scpsys.c +++ b/drivers/soc/mediatek/mtk-scpsys.c @@ -182,11 +182,13 @@ struct scp { struct regmap *infracfg; struct regmap *smi_common; struct scp_ctrl_reg ctrl_reg; + struct list_head dep_links; }; struct scp_subdomain { int origin; int subdomain; + struct list_head list; }; struct scp_soc_data { @@ -513,6 +515,79 @@ static int init_basic_clks(struct platform_device *pdev, struct clk **clk, return 0; } +static int scpsys_get_domain_id(struct device_node *node, u32 *id) +{ + int ret; + + ret = of_property_read_u32(node, "reg", id); + if (ret) + pr_err("%pOFn: failed to retrieve domain id, ret=%d\n", node, ret); + + return ret; +} + +static int scpsys_get_domain(struct platform_device *pdev, struct scp *scp, + struct device_node *node, const struct scp_domain_data *data) +{ + struct scp_subdomain *dep_node; + struct device_node *sub; + u32 parent_id, child_id; + int ret; + + ret = scpsys_get_domain_id(node, &parent_id); + if (ret) + return ret; + + for_each_child_of_node(node, sub) { + ret = scpsys_get_domain_id(sub, &child_id); + if (ret) + goto out; + + dep_node = devm_kzalloc(&pdev->dev, sizeof(*dep_node), GFP_KERNEL); + if (!dep_node) { + ret = -ENOMEM; + goto out; + } + + dep_node->origin = parent_id; + dep_node->subdomain = child_id; + list_add(&dep_node->list, &scp->dep_links); + + scpsys_get_domain(pdev, scp, sub, data); + } + + return 0; + +out: + of_node_put(sub); + return ret; +} + +static int traverse_scp(struct platform_device *pdev, struct scp *scp, + const struct scp_domain_data *scp_domain_data) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct device_node *sub; + int ret; + + INIT_LIST_HEAD(&scp->dep_links); + + for_each_available_child_of_node(np, sub) { + ret = scpsys_get_domain(pdev, scp, sub, scp_domain_data); + if (ret) { + dev_err(&pdev->dev, "failed to handle node %pOFn: %d\n", sub, ret); + goto err; + } + } + + return 0; + +err: + of_node_put(sub); + return ret; +} + static struct scp *init_scp(struct platform_device *pdev, const struct scp_domain_data *scp_domain_data, int num, const struct scp_ctrl_reg *scp_ctrl_reg) @@ -582,6 +657,10 @@ static struct scp *init_scp(struct platform_device *pdev, pd_data->num_domains = num; + ret = traverse_scp(pdev, scp, scp_domain_data); + if (ret) + return ERR_PTR(ret); + for (i = 0; i < num; i++) { struct scp_domain *scpd = &scp->domains[i]; struct generic_pm_domain *genpd = &scpd->genpd; @@ -1208,7 +1287,7 @@ static int scpsys_probe(struct platform_device *pdev) const struct scp_soc_data *soc; struct scp *scp; struct genpd_onecell_data *pd_data; - int i, ret; + int i, ret = 0; soc = of_device_get_match_data(&pdev->dev); @@ -1220,15 +1299,23 @@ static int scpsys_probe(struct platform_device *pdev) pd_data = &scp->pd_data; - for (i = 0, sd = soc->subdomains; i < soc->num_subdomains; i++, sd++) { - ret = pm_genpd_add_subdomain(pd_data->domains[sd->origin], - pd_data->domains[sd->subdomain]); - if (ret && IS_ENABLED(CONFIG_PM)) - dev_err(&pdev->dev, "Failed to add subdomain: %d\n", - ret); + if (soc->subdomains && soc->num_subdomains) { + for (i = 0, sd = soc->subdomains; i < soc->num_subdomains; i++, sd++) { + ret = pm_genpd_add_subdomain(pd_data->domains[sd->origin], + pd_data->domains[sd->subdomain]); + if (ret && IS_ENABLED(CONFIG_PM)) + dev_err(&pdev->dev, "Failed to add subdomain: %d\n", ret); + } + } else { + list_for_each_entry(sd, &scp->dep_links, list) { + ret = pm_genpd_add_subdomain(pd_data->domains[sd->origin], + pd_data->domains[sd->subdomain]); + if (ret && IS_ENABLED(CONFIG_PM)) + dev_err(&pdev->dev, "Failed to add subdomain: %d\n", ret); + } } - return 0; + return ret; } static struct platform_driver scpsys_drv = {