From patchwork Mon Jul 27 11:15:00 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 6872271 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id C68A89F380 for ; Mon, 27 Jul 2015 11:18:54 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CAE5620558 for ; Mon, 27 Jul 2015 11:18:53 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CA1CB20528 for ; Mon, 27 Jul 2015 11:18:52 +0000 (UTC) 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 1ZJgP4-0007dh-R3; Mon, 27 Jul 2015 11:17:06 +0000 Received: from mail-wi0-f169.google.com ([209.85.212.169]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZJgOm-0007AH-IX for linux-arm-kernel@lists.infradead.org; Mon, 27 Jul 2015 11:16:52 +0000 Received: by wicgb10 with SMTP id gb10so107207231wic.1 for ; Mon, 27 Jul 2015 04:16:27 -0700 (PDT) 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=wlUuLz/+SXWcNPEPr4b7EjjGLx2L1cBBfJNcP/zgmVY=; b=B/OIjlGhYJKJqa+xDBnyTVdaLThyppBSzM+Vn4dVkbSPSlAVco5TTaHAK89TNGgzxk A9VoGzEmmLBEXC+qkR+qeZwrO2uxo+FRDA29KXY4YLaB6acFUy2VwWtwbwNy76K2BnkB 20o2eOLN54p/120Osx2aScRKRIr3c1+YLIO5oF2zSndlHAuBnvoT9hVlUuCCYLIA0XWo UTi4YPCzbhNkkJZXDPc0MKXwwwqcV4vEkvwUEhUde8vSceLoqCSvwe5zz6V1Rbm+/QVd abnnux0y9Yi/kHwZ0mhveAVrr9CO5Op9+lxyBAQHJSAj21f/Um3v1NqKUilUx8YRM9kp +LYA== X-Gm-Message-State: ALoCoQkVQuRh1qf4TeunhYxmC2mvhK3YP9PfYCU6YaoECVgKA34eMGvB6+4h75hgzpBIlOjC3umc X-Received: by 10.180.11.194 with SMTP id s2mr12507826wib.33.1437995787266; Mon, 27 Jul 2015 04:16:27 -0700 (PDT) Received: from srini-ThinkPad-X1-Carbon-2nd.dlink.com (host-78-147-3-201.as13285.net. [78.147.3.201]) by smtp.gmail.com with ESMTPSA id pf4sm27326073wjb.23.2015.07.27.04.16.24 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 27 Jul 2015 04:16:26 -0700 (PDT) From: Srinivas Kandagatla To: khilman@kernel.org, linux-arm-kernel@lists.infradead.org, Greg Kroah-Hartman Subject: [PATCH v9 6/9] nvmem: qfprom: Add Qualcomm QFPROM support. Date: Mon, 27 Jul 2015 12:15:00 +0100 Message-Id: <1437995700-11596-1-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1437995567-11203-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1437995567-11203-1-git-send-email-srinivas.kandagatla@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150727_041648_906672_3D5AC849 X-CRM114-Status: GOOD ( 20.69 ) X-Spam-Score: -2.6 (--) 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: stefan.wahren@i2se.com, devicetree@vger.kernel.org, arnd@arndb.de, linux-api@vger.kernel.org, s.hauer@pengutronix.de, sboyd@codeaurora.org, linux-kernel@vger.kernel.org, Rob Herring , pantelis.antoniou@konsulko.com, Mark Brown , Srinivas Kandagatla , linux-arm-msm@vger.kernel.org, mporter@konsulko.com, wxt@rock-chips.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds QFPROM support driver which is used by other drivers like thermal sensor and cpufreq. On MSM parts there are some efuses (called qfprom) these fuses store things like calibration data, speed bins.. etc. Drivers like cpufreq, thermal sensors would read out this data for configuring the driver. Signed-off-by: Srinivas Kandagatla Reviewed-by: Stephen Boyd --- drivers/nvmem/Kconfig | 15 +++++++++ drivers/nvmem/Makefile | 4 +++ drivers/nvmem/qfprom.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 104 insertions(+) create mode 100644 drivers/nvmem/qfprom.c diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index de90c82..fa85805 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -11,3 +11,18 @@ menuconfig NVMEM will be called nvmem_core. If unsure, say no. + +if NVMEM + +config QCOM_QFPROM + tristate "QCOM QFPROM Support" + depends on ARCH_QCOM || COMPILE_TEST + select REGMAP_MMIO + help + Say y here to enable QFPROM support. The QFPROM provides access + functions for QFPROM data to rest of the drivers via nvmem interface. + + This driver can also be built as a module. If so, the module + will be called nvmem_qfprom. + +endif diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index 6df2c69..ff44fe9 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -4,3 +4,7 @@ obj-$(CONFIG_NVMEM) += nvmem_core.o nvmem_core-y := core.o + +# Devices +obj-$(CONFIG_QCOM_QFPROM) += nvmem_qfprom.o +nvmem_qfprom-y := qfprom.o diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c new file mode 100644 index 0000000..afb67e7 --- /dev/null +++ b/drivers/nvmem/qfprom.c @@ -0,0 +1,85 @@ +/* + * Copyright (C) 2015 Srinivas Kandagatla + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include + +static struct regmap_config qfprom_regmap_config = { + .reg_bits = 32, + .val_bits = 8, + .reg_stride = 1, +}; + +static struct nvmem_config econfig = { + .name = "qfprom", + .owner = THIS_MODULE, +}; + +static int qfprom_remove(struct platform_device *pdev) +{ + struct nvmem_device *nvmem = platform_get_drvdata(pdev); + + return nvmem_unregister(nvmem); +} + +static int qfprom_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *res; + struct nvmem_device *nvmem; + struct regmap *regmap; + void __iomem *base; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + qfprom_regmap_config.max_register = resource_size(res) - 1; + + regmap = devm_regmap_init_mmio(dev, base, &qfprom_regmap_config); + if (IS_ERR(regmap)) { + dev_err(dev, "regmap init failed\n"); + return PTR_ERR(regmap); + } + econfig.dev = dev; + nvmem = nvmem_register(&econfig); + if (IS_ERR(nvmem)) + return PTR_ERR(nvmem); + + platform_set_drvdata(pdev, nvmem); + + return 0; +} + +static const struct of_device_id qfprom_of_match[] = { + { .compatible = "qcom,qfprom",}, + {/* sentinel */}, +}; +MODULE_DEVICE_TABLE(of, qfprom_of_match); + +static struct platform_driver qfprom_driver = { + .probe = qfprom_probe, + .remove = qfprom_remove, + .driver = { + .name = "qcom,qfprom", + .of_match_table = qfprom_of_match, + }, +}; +module_platform_driver(qfprom_driver); +MODULE_AUTHOR("Srinivas Kandagatla "); +MODULE_DESCRIPTION("Qualcomm QFPROM driver"); +MODULE_LICENSE("GPL v2");