From: <andrew-ct.chen@mediatek.com>
To: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Sascha Hauer <s.hauer@pengutronix.de>,
<devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <srv_heupstream@mediatek.com>,
Andrew-CT Chen <andrew-ct.chen@mediatek.com>
Subject: [PATCH 2/3] nvmem: mediatek: Add Mediatek EFUSE driver
Date: Fri, 16 Oct 2015 16:39:10 +0800 [thread overview]
Message-ID: <1444984751-4572-3-git-send-email-andrew-ct.chen@mediatek.com> (raw)
In-Reply-To: <1444984751-4572-1-git-send-email-andrew-ct.chen@mediatek.com>
From: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
Add Mediatek EFUSE driver to access hardware data like
thermal sensor calibration or HDMI impedance.
Signed-off-by: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
---
drivers/nvmem/Kconfig | 11 ++++++
drivers/nvmem/Makefile | 1 +
drivers/nvmem/mtk-efuse.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 101 insertions(+)
create mode 100644 drivers/nvmem/mtk-efuse.c
diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig
index 8db2978..1bd5badc 100644
--- a/drivers/nvmem/Kconfig
+++ b/drivers/nvmem/Kconfig
@@ -14,6 +14,17 @@ menuconfig NVMEM
if NVMEM
+config MTK_EFUSE
+ tristate "Mediatek SoCs EFUSE support"
+ depends on ARCH_MEDIATEK || COMPILE_TEST
+ select REGMAP_MMIO
+ help
+ This is a driver to access hardware related data like sensor
+ calibration, HDMI impedance etc.
+
+ This driver can also be built as a module. If so, the module
+ will be called efuse-mtk.
+
config QCOM_QFPROM
tristate "QCOM QFPROM Support"
depends on ARCH_QCOM || COMPILE_TEST
diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile
index 4328b93..916b727 100644
--- a/drivers/nvmem/Makefile
+++ b/drivers/nvmem/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_NVMEM) += nvmem_core.o
nvmem_core-y := core.o
# Devices
+obj-$(CONFIG_MTK_EFUSE) += mtk-efuse.o
obj-$(CONFIG_QCOM_QFPROM) += nvmem_qfprom.o
nvmem_qfprom-y := qfprom.o
obj-$(CONFIG_NVMEM_SUNXI_SID) += nvmem_sunxi_sid.o
diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c
new file mode 100644
index 0000000..9021c0b
--- /dev/null
+++ b/drivers/nvmem/mtk-efuse.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ * Author: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License 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 <linux/device.h>
+#include <linux/module.h>
+#include <linux/nvmem-provider.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+static struct regmap_config mtk_regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+};
+
+static int mtk_efuse_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ struct nvmem_device *nvmem;
+ struct nvmem_config *econfig;
+ 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);
+
+ econfig = devm_kzalloc(dev, sizeof(*econfig), GFP_KERNEL);
+ if (!econfig)
+ return -ENOMEM;
+
+ mtk_regmap_config.max_register = resource_size(res) - 1;
+
+ regmap = devm_regmap_init_mmio(dev, base, &mtk_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(dev, "regmap init failed\n");
+ return PTR_ERR(regmap);
+ }
+
+ econfig->dev = dev;
+ econfig->owner = THIS_MODULE;
+ nvmem = nvmem_register(econfig);
+ if (IS_ERR(nvmem))
+ return PTR_ERR(nvmem);
+
+ platform_set_drvdata(pdev, nvmem);
+
+ return 0;
+}
+
+static int mtk_efuse_remove(struct platform_device *pdev)
+{
+ struct nvmem_device *nvmem = platform_get_drvdata(pdev);
+
+ return nvmem_unregister(nvmem);
+}
+
+static const struct of_device_id mtk_efuse_of_match[] = {
+ { .compatible = "mediatek,mt8135-efuse",},
+ { .compatible = "mediatek,mt8173-efuse",},
+ {/* sentinel */},
+};
+MODULE_DEVICE_TABLE(of, mtk_efuse_of_match);
+
+static struct platform_driver mtk_efuse_driver = {
+ .probe = mtk_efuse_probe,
+ .remove = mtk_efuse_remove,
+ .driver = {
+ .name = "mediatek,efuse",
+ .of_match_table = mtk_efuse_of_match,
+ },
+};
+module_platform_driver(mtk_efuse_driver);
+MODULE_AUTHOR("Andrew-CT Chen <andrew-ct.chen@mediatek.com>");
+MODULE_DESCRIPTION("Mediatek EFUSE driver");
+MODULE_LICENSE("GPL v2");
--
1.9.1
next prev parent reply other threads:[~2015-10-16 8:40 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-16 8:39 [PATCH 0/3] Mediatek EFUSE Support andrew-ct.chen
2015-10-16 8:39 ` [PATCH 1/3] dt-bindings: add document of mediatek efuse driver andrew-ct.chen
2015-10-26 9:56 ` Srinivas Kandagatla
2015-10-26 10:23 ` Sascha Hauer
2015-10-26 10:55 ` Srinivas Kandagatla
2015-10-27 5:32 ` andrew-ct chen
2015-10-27 9:27 ` andrew-ct chen
2015-10-16 8:39 ` andrew-ct.chen [this message]
2015-10-26 9:56 ` [PATCH 2/3] nvmem: mediatek: Add Mediatek EFUSE driver Srinivas Kandagatla
2015-10-26 10:28 ` Sascha Hauer
2015-10-26 10:39 ` Srinivas Kandagatla
2015-10-27 5:32 ` andrew-ct chen
2015-10-27 9:28 ` andrew-ct chen
2015-10-16 8:39 ` [PATCH 3/3] dts: arm64: Add EFUSE device node andrew-ct.chen
2015-10-19 6:49 ` [PATCH 0/3] Mediatek EFUSE Support Sascha Hauer
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