From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 08 Aug 2022 16:02:14 +0200 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oL3Ke-00GEod-E0 for lore@lore.pengutronix.de; Mon, 08 Aug 2022 16:02:14 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oL3Kf-0007Vp-6y for lore@pengutronix.de; Mon, 08 Aug 2022 16:02:14 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=9WucUtwlbhtmNbaZHHAO5gkR3WScmRd01LEYwV1B+cs=; b=MWPKCw8vGDdvLR2ONQ+jyOubaz h2dATl2pGKkRvIsOlP3MtmPbNgqZU5seMIbBvyYL9q0REM7SAWmPJfkuI9aOBm9ofsolFluhkhE9U faYIi2CKp0xBqV7uBJK2NdGy9RGexuzEkbhG4M7sCmqKJGE+tVNJPNJdvMjoYVtYFIrikndAlptLn xSXz1U9E5RPGdYeQThwMSHS1ZfFrQUJmYSelaNUJqL9dcuPN3FnGgVMC/LilLVRf4U+AOUPfnQ6D9 h3fHetM2EoVbsTXQx/QCJcbY0QFLNzP1glHC3BT5qB/kXSn+A2eq0sUGVVaXMkJxVIKG6UUT4bHIl mAbdXPVw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oL3JI-00EFdX-IY; Mon, 08 Aug 2022 14:00:48 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oL3JB-00EFb8-I2 for barebox@lists.infradead.org; Mon, 08 Aug 2022 14:00:42 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oL3JA-0006st-0F; Mon, 08 Aug 2022 16:00:40 +0200 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1oL3J6-002Vim-Uj; Mon, 08 Aug 2022 16:00:39 +0200 Received: from afa by dude04.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1oL3J8-0071Dt-45; Mon, 08 Aug 2022 16:00:38 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Mon, 8 Aug 2022 16:00:33 +0200 Message-Id: <20220808140035.1672733-2-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220808140035.1672733-1-a.fatoum@pengutronix.de> References: <20220808140035.1672733-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220808_070041_614164_8DEC5BD2 X-CRM114-Status: GOOD ( 16.38 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.0 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH master v3 2/4] drivers: power: ignore power domains with barebox,allow-dummy X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) With deep probe enabled, we can know for certain whether a driver will be found for a device or not. This allows us to specially handle devices that lack a driver. We already do that for regulators, where the device tree can specify barebox,allow-dummy-supply for regulators that are known to be enabled by the time barebox runs. Add the same functionality for power domains as well. Signed-off-by: Ahmad Fatoum --- v2 -> v3: - no change v1 -> v2: - no change --- drivers/base/power.c | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) diff --git a/drivers/base/power.c b/drivers/base/power.c index 96cac1a091f3..4a206051b137 100644 --- a/drivers/base/power.c +++ b/drivers/base/power.c @@ -139,14 +139,32 @@ static struct generic_pm_domain *genpd_get_from_provider( struct of_phandle_args *genpdspec) { struct generic_pm_domain *genpd = ERR_PTR(-ENOENT); + struct device_node *node = genpdspec->np; struct of_genpd_provider *provider; + int ret; if (!genpdspec) return ERR_PTR(-EINVAL); + ret = of_device_ensure_probed(node); + if (ret) { + struct device_node *parent; + + /* + * If "barebox,allow-dummy" property is set for power domain + * provider, assume it's turned on. + */ + parent = of_get_parent(node); + if (of_get_property(node, "barebox,allow-dummy", NULL) || + of_get_property(parent, "barebox,allow-dummy", NULL)) + return NULL; + + return ERR_PTR(ret); + } + /* Check if we have such a provider in our array */ list_for_each_entry(provider, &of_genpd_providers, link) { - if (provider->node == genpdspec->np) + if (provider->node == node) genpd = provider->xlate(genpdspec, provider->data); if (!IS_ERR(genpd)) break; @@ -175,7 +193,7 @@ static int genpd_power_on(struct generic_pm_domain *genpd, unsigned int depth) { int ret; - if (genpd_status_on(genpd)) + if (!genpd || genpd_status_on(genpd)) return 0; ret = _genpd_power_on(genpd, true); @@ -211,7 +229,7 @@ static int __genpd_dev_pm_attach(struct device_d *dev, struct device_node *np, return (ret == -ENOENT) ? -EPROBE_DEFER : ret; } - dev_dbg(dev, "adding to PM domain %s\n", pd->name); + dev_dbg(dev, "adding to PM domain %s\n", pd ? pd->name : "dummy"); if (power_on) ret = genpd_power_on(pd, 0); -- 2.30.2