1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
6 #include <linux/device.h>
7 #include <linux/module.h>
8 #include <linux/mod_devicetable.h>
10 #include <linux/nvmem-provider.h>
11 #include <linux/platform_device.h>
17 static int qfprom_reg_read(void *context,
18 unsigned int reg, void *_val, size_t bytes)
20 struct qfprom_priv *priv = context;
22 int i = 0, words = bytes;
25 *val++ = readb(priv->base + reg + i++);
30 static struct nvmem_config econfig = {
34 .reg_read = qfprom_reg_read,
37 static int qfprom_probe(struct platform_device *pdev)
39 struct device *dev = &pdev->dev;
41 struct nvmem_device *nvmem;
42 struct qfprom_priv *priv;
44 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
48 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
49 priv->base = devm_ioremap_resource(dev, res);
50 if (IS_ERR(priv->base))
51 return PTR_ERR(priv->base);
53 econfig.size = resource_size(res);
57 nvmem = devm_nvmem_register(dev, &econfig);
59 return PTR_ERR_OR_ZERO(nvmem);
62 static const struct of_device_id qfprom_of_match[] = {
63 { .compatible = "qcom,qfprom",},
66 MODULE_DEVICE_TABLE(of, qfprom_of_match);
68 static struct platform_driver qfprom_driver = {
69 .probe = qfprom_probe,
71 .name = "qcom,qfprom",
72 .of_match_table = qfprom_of_match,
75 module_platform_driver(qfprom_driver);
76 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");
77 MODULE_DESCRIPTION("Qualcomm QFPROM driver");
78 MODULE_LICENSE("GPL v2");