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[2001:1868:205::9]) by mx.google.com with ESMTPS id e16si9031433pfb.26.2016.04.22.15.19.12 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 22 Apr 2016 15:19:12 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org designates 2001:1868:205::9 as permitted sender) client-ip=2001:1868:205::9; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@linaro.org; spf=pass (google.com: best guess record for domain of linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org designates 2001:1868:205::9 as permitted sender) smtp.mailfrom=linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org; dmarc=fail (p=NONE dis=NONE) header.from=linaro.org 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 1atjOs-0008MR-Ne; Fri, 22 Apr 2016 22:18:10 +0000 Received: from mail-oi0-x232.google.com ([2607:f8b0:4003:c06::232]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1atjOV-00085o-GN for linux-arm-kernel@lists.infradead.org; Fri, 22 Apr 2016 22:17:48 +0000 Received: by mail-oi0-x232.google.com with SMTP id k142so129818358oib.1 for ; Fri, 22 Apr 2016 15:17:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=gtueDIjQKn3jAUCR1VJ2zO+pXlMnZtOMBCsU5Mqp4OA=; b=ZWguvM8w7WrYudBhg2Qht7rANLFDDAnyGCXTSPrFJsWjLvibOCAEPcbv8bpLYasFDx ii5v9tSytU01zinIQY2ZYAbiuCypiq2sL2dmpn8I6baHmFyRZ5rK4w++e3tR2EAphGI2 zeTjPOKTc+sh3pkjz7hoJ59UNB+KmLeOsDpQE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=gtueDIjQKn3jAUCR1VJ2zO+pXlMnZtOMBCsU5Mqp4OA=; b=W4ed0MlubHDGyHqn5Ga2PdmWXj264z2Dt6vI5HZFOWcVvOWGavBM6pHnaopeg/f5fG t21QOeANmR6r2Kwnz+truQ8mS6ho/d/XCxm/B/vc0McbgSrvVnwjYS2JgIpwebu35ewR Nw+u98lMZ22Vh6csbTGJwPdcJE8cGRjseL4109ftZ2H+vycoSlApd6Bo/Hb/erRXxcyv bUZVxdD4Ult2jjaDZ/zA4rOmSwUoCTb4+D40KIFBh/KZWJHZsWkmpIHKVc+Vuu6Aki6T 9Lx0cc0HXsbI9bETOaOZ+4Qqat8oS4Jvs2vDOd4YO205QgpZOJyUB1H/J7ELzl2aRoer KScg== X-Gm-Message-State: AOPr4FUK8oVkllCpkB5COvLsajs7Om+dp81Xw1Hgtg0GVFuZir+Xo3oCAEQjiYg4QQqgGnNb X-Received: by 10.202.44.19 with SMTP id s19mr9427704ois.78.1461363446623; Fri, 22 Apr 2016 15:17:26 -0700 (PDT) Received: from localhost ([2602:306:c558:19b0:a419:15a3:ad7f:f979]) by smtp.gmail.com with ESMTPSA id t92sm2608068otb.14.2016.04.22.15.17.25 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Fri, 22 Apr 2016 15:17:26 -0700 (PDT) From: Andy Gross To: linux-arm-msm@vger.kernel.org Subject: [PATCH 2/8] firmware: qcom: scm: Convert SCM to platform driver Date: Fri, 22 Apr 2016 17:17:06 -0500 Message-Id: <1461363432-5730-3-git-send-email-andy.gross@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1461363432-5730-1-git-send-email-andy.gross@linaro.org> References: <1461363432-5730-1-git-send-email-andy.gross@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160422_151747_615787_FDDB9DD2 X-CRM114-Status: GOOD ( 16.73 ) X-Spam-Score: -2.7 (--) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-2.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [2607:f8b0:4003:c06:0:0:0:232 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Stephen Boyd , linux-kernel@vger.kernel.org, Andy Gross , Bjorn Andersson , jilai wang , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org This patch converts the Qualcomm SCM firmware driver into a platform driver. Signed-off-by: Andy Gross --- arch/arm64/Kconfig.platforms | 1 + drivers/firmware/qcom_scm.c | 154 ++++++++++++++++++++++++++++++++++++++++--- 2 files changed, 147 insertions(+), 8 deletions(-) -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms index efa77c1..6f0876f 100644 --- a/arch/arm64/Kconfig.platforms +++ b/arch/arm64/Kconfig.platforms @@ -76,6 +76,7 @@ config ARCH_MVEBU config ARCH_QCOM bool "Qualcomm Platforms" select PINCTRL + select QCOM_SCM help This enables support for the ARMv8 based Qualcomm chipsets. diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index 45c008d..8e1eeb8 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -10,19 +10,68 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. */ - +#include +#include #include #include #include #include +#include +#include #include "qcom_scm.h" +struct qcom_scm { + struct device *dev; + struct clk *core_clk; + struct clk *iface_clk; + struct clk *bus_clk; +}; + +static struct qcom_scm *__scm; + +static int qcom_scm_clk_enable(void) +{ + int ret; + + ret = clk_prepare_enable(__scm->core_clk); + if (ret) + goto bail; + + if (__scm->iface_clk) { + ret = clk_prepare_enable(__scm->iface_clk); + if (ret) + goto disable_core; + } + + if (__scm->bus_clk) { + ret = clk_prepare_enable(__scm->bus_clk); + if (ret) + goto disable_iface; + } + + return 0; + +disable_iface: + if (__scm->iface_clk) + clk_disable_unprepare(__scm->iface_clk); +disable_core: + if (__scm->bus_clk) + clk_disable_unprepare(__scm->core_clk); +bail: + return ret; +} + +static void qcom_scm_clk_disable(void) +{ + clk_disable_unprepare(__scm->core_clk); + if (__scm->iface_clk) + clk_disable_unprepare(__scm->iface_clk); + if (__scm->bus_clk) + clk_disable_unprepare(__scm->bus_clk); +} + /** * qcom_scm_set_cold_boot_addr() - Set the cold boot address for cpus * @entry: Entry point function for the cpus @@ -72,11 +121,17 @@ EXPORT_SYMBOL(qcom_scm_cpu_power_down); */ bool qcom_scm_hdcp_available(void) { - int ret; + int ret = qcom_scm_clk_enable(); + + if (ret) + goto clk_err; ret = __qcom_scm_is_call_available(QCOM_SCM_SVC_HDCP, - QCOM_SCM_CMD_HDCP); + QCOM_SCM_CMD_HDCP); + + qcom_scm_clk_disable(); +clk_err: return (ret > 0) ? true : false; } EXPORT_SYMBOL(qcom_scm_hdcp_available); @@ -91,6 +146,89 @@ EXPORT_SYMBOL(qcom_scm_hdcp_available); */ int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp) { - return __qcom_scm_hdcp_req(req, req_cnt, resp); + int ret = qcom_scm_clk_enable(); + + if (ret) + return ret; + + ret = __qcom_scm_hdcp_req(req, req_cnt, resp); + qcom_scm_clk_disable(); + return ret; } EXPORT_SYMBOL(qcom_scm_hdcp_req); + +/** + * qcom_scm_is_available() - Checks if SCM is available + */ +bool qcom_scm_is_available(void) +{ + return !!__scm; +} +EXPORT_SYMBOL(qcom_scm_is_available); + +static int qcom_scm_probe(struct platform_device *pdev) +{ + struct qcom_scm *scm; + long rate; + int ret; + + scm = devm_kzalloc(&pdev->dev, sizeof(*scm), GFP_KERNEL); + if (!scm) + return -ENOMEM; + + scm->core_clk = devm_clk_get(&pdev->dev, "core"); + if (IS_ERR(scm->core_clk)) { + if (PTR_ERR(scm->core_clk) != -EPROBE_DEFER) + dev_err(&pdev->dev, "failed to acquire core clk\n"); + return PTR_ERR(scm->core_clk); + } + + if (of_device_is_compatible(pdev->dev.of_node, "qcom,scm-apq8064")) { + scm->iface_clk = devm_clk_get(&pdev->dev, "iface"); + if (IS_ERR(scm->iface_clk)) { + if (PTR_ERR(scm->iface_clk) != -EPROBE_DEFER) + dev_err(&pdev->dev, "failed to acquire iface clk\n"); + return PTR_ERR(scm->iface_clk); + } + + scm->bus_clk = devm_clk_get(&pdev->dev, "bus"); + if (IS_ERR(scm->bus_clk)) { + if (PTR_ERR(scm->bus_clk) != -EPROBE_DEFER) + dev_err(&pdev->dev, "failed to acquire bus clk\n"); + return PTR_ERR(scm->bus_clk); + } + } + + /* vote for max clk rate for highest performance */ + rate = clk_round_rate(scm->core_clk, INT_MAX); + ret = clk_set_rate(scm->core_clk, rate); + if (ret) + return ret; + + __scm = scm; + __scm->dev = &pdev->dev; + + return 0; +} + +static const struct of_device_id qcom_scm_dt_match[] = { + { .compatible = "qcom,scm-apq8064",}, + { .compatible = "qcom,scm-apq8084",}, + { .compatible = "qcom,scm-msm8916",}, + { .compatible = "qcom,scm-msm8974",}, + {}, +}; + +MODULE_DEVICE_TABLE(of, qcom_scm_dt_match); + +static struct platform_driver qcom_scm_driver = { + .driver = { + .name = "qcom_scm", + .of_match_table = qcom_scm_dt_match, + }, + .probe = qcom_scm_probe, +}; + +builtin_platform_driver(qcom_scm_driver); +MODULE_DESCRIPTION("Qualcomm SCM driver"); +MODULE_LICENSE("GPL v2");