diff options
| -rw-r--r-- | drivers/nvmem/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/nvmem/Makefile | 2 | ||||
| -rw-r--r-- | drivers/nvmem/mtk-efuse.c | 89 |
3 files changed, 102 insertions, 0 deletions
diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index 6ff1b5051ae1..5bd18cc1a69c 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -45,6 +45,17 @@ config NVMEM_MXS_OCOTP This driver can also be built as a module. If so, the module will be called nvmem-mxs-ocotp. +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 c14a55644c5f..45ab1ae08fa9 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -12,6 +12,8 @@ obj-$(CONFIG_NVMEM_LPC18XX_EEPROM) += nvmem_lpc18xx_eeprom.o nvmem_lpc18xx_eeprom-y := lpc18xx_eeprom.o obj-$(CONFIG_NVMEM_MXS_OCOTP) += nvmem-mxs-ocotp.o nvmem-mxs-ocotp-y := mxs-ocotp.o +obj-$(CONFIG_MTK_EFUSE) += nvmem_mtk-efuse.o +nvmem_mtk-efuse-y := mtk-efuse.o obj-$(CONFIG_QCOM_QFPROM) += nvmem_qfprom.o nvmem_qfprom-y := qfprom.o obj-$(CONFIG_ROCKCHIP_EFUSE) += nvmem_rockchip_efuse.o diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c new file mode 100644 index 000000000000..7b35f5b630cd --- /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,mt8173-efuse",}, + { .compatible = "mediatek,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"); |