From patchwork Thu Feb 19 17:08:51 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 5852681 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 BBC499F36A for ; Thu, 19 Feb 2015 17:11:52 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C8704202B8 for ; Thu, 19 Feb 2015 17:11:51 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DE834202AE for ; Thu, 19 Feb 2015 17:11:50 +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 1YOUbf-00038j-Fq; Thu, 19 Feb 2015 17:09:43 +0000 Received: from mail-we0-f174.google.com ([74.125.82.174]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YOUbH-0002pd-Oy for linux-arm-kernel@lists.infradead.org; Thu, 19 Feb 2015 17:09:20 +0000 Received: by wesx3 with SMTP id x3so995583wes.7 for ; Thu, 19 Feb 2015 09:08:57 -0800 (PST) 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=GhbM2c/z7uwEyGZOqaCmZt6UBLsCw6jJJDUuSzPxX0o=; b=QpKdx5g3yPWj/cQVyMa2831fRs/zN4oBOOt8a/WYe/KB6JVXg6zXpt2DNgMSPacZls a2TY7HqR1/9/dcg304rpZZ3HyPZfGNg0SOA9AYh/oXvK7WGASAIQy/PYrGH0RWopzVz7 I0y57qp5eefAKlQgPOqQGBZuhrDbdwSytvn6UjAe35Fql41M+jI7cNV/qT9VVWOr2UuR q08u0W/8Kwf9fOpFXhOcHA/3Qv+a/dvW70AJ4ztI7wbl2NdWhxtrIJrIT4HVe8KUnAu1 ioEukC1cd+ygTPfKno5QedWldAEBQU0W/97itfN1mzjmb0z316SwEn2Qsf1u3fkmmibp d2Nw== X-Gm-Message-State: ALoCoQnw1aPcNsYJEwHZSy8BFuJZ5YP8qYjonLglqY3vdp/xgv+UFVZVmS79vTW/Kwm+LxcqmJzO X-Received: by 10.194.83.98 with SMTP id p2mr10558136wjy.125.1424365737624; Thu, 19 Feb 2015 09:08:57 -0800 (PST) Received: from srini-ThinkPad-X1-Carbon-2nd.dlink.com (host-2-96-88-56.as13285.net. [2.96.88.56]) by mx.google.com with ESMTPSA id cb14sm31012848wib.22.2015.02.19.09.08.54 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 19 Feb 2015 09:08:56 -0800 (PST) From: Srinivas Kandagatla To: linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH 3/3] eeprom: qfprom: Add Qualcomm QFPROM support. Date: Thu, 19 Feb 2015 17:08:51 +0000 Message-Id: <1424365731-26768-1-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1424365639-26634-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1424365639-26634-1-git-send-email-srinivas.kandagatla@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150219_090920_031003_21DF03C2 X-CRM114-Status: GOOD ( 15.00 ) X-Spam-Score: -0.7 (/) Cc: devicetree@vger.kernel.org, Arnd Bergmann , Pawel Moll , Greg Kroah-Hartman , linux-api@vger.kernel.org, broonie@kernel.org, Stephen Boyd , linux-kernel@vger.kernel.org, Rob Herring , Srinivas Kandagatla , Kumar Gala , Maxime Ripard X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_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 --- drivers/eeprom/Kconfig | 6 ++++ drivers/eeprom/Makefile | 1 + drivers/eeprom/qfprom.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 82 insertions(+) create mode 100644 drivers/eeprom/qfprom.c diff --git a/drivers/eeprom/Kconfig b/drivers/eeprom/Kconfig index 39235a9..b0c94cb 100644 --- a/drivers/eeprom/Kconfig +++ b/drivers/eeprom/Kconfig @@ -26,4 +26,10 @@ config EEPROM_SUNXI_SID This driver can also be built as a module. If so, the module will be called sunxi_sid. +config QCOM_QFPROM + tristate "QCOM QFPROM Support" + depends on EEPROM + help + Say y here to enable QFPROM support. The QFPROM provides access + functions for QFPROM data to rest of the drivers via eeprom interface. endif diff --git a/drivers/eeprom/Makefile b/drivers/eeprom/Makefile index 661422c..f99c824 100644 --- a/drivers/eeprom/Makefile +++ b/drivers/eeprom/Makefile @@ -8,3 +8,4 @@ obj-$(CONFIG_EEPROM) += core.o # Devices obj-$(CONFIG_EEPROM_SUNXI_SID) += eeprom-sunxi-sid.o +obj-$(CONFIG_QCOM_QFPROM) += qfprom.o diff --git a/drivers/eeprom/qfprom.c b/drivers/eeprom/qfprom.c new file mode 100644 index 0000000..da31b36 --- /dev/null +++ b/drivers/eeprom/qfprom.c @@ -0,0 +1,75 @@ +#include +#include +#include +#include +#include +#include + +static struct regmap_config qfprom_regmap_config = { + .reg_bits = 32, + .val_bits = 8, + .reg_stride = 1, +}; + +static int qfprom_remove(struct platform_device *pdev) +{ + struct eeprom_device *eeprom = platform_get_drvdata(pdev); + + return eeprom_unregister(eeprom); +} + +static int qfprom_probe(struct platform_device *pdev) +{ + struct resource *res; + void __iomem *base; + struct device *dev = &pdev->dev; + struct eeprom_device *eeprom; + int rval; + + eeprom = devm_kzalloc(dev, sizeof(*eeprom), GFP_KERNEL); + if (!eeprom) + return -ENOMEM; + + 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; + + eeprom->regmap = devm_regmap_init_mmio(dev, base, + &qfprom_regmap_config); + if (IS_ERR(eeprom->regmap)) { + dev_err(dev, "regmap init failed\n"); + return PTR_ERR(eeprom->regmap); + } + + eeprom->dev = dev; + eeprom->stride = qfprom_regmap_config.reg_stride; + eeprom->size = resource_size(res) - 1; + rval = eeprom_register(eeprom); + if (rval) + return rval; + + platform_set_drvdata(pdev, eeprom); + 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("GPL2");