1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c
new file mode 100644
index 000000000..e62926b29
--- /dev/null
+++ b/drivers/nvmem/qfprom.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+ *
+ * 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 <linux/device.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/io.h>
+#include <linux/nvmem-provider.h>
+#include <linux/platform_device.h>
+
+struct qfprom_priv {
+	void __iomem *base;
+};
+
+static int qfprom_reg_read(void *context,
+			unsigned int reg, void *_val, size_t bytes)
+{
+	struct qfprom_priv *priv = context;
+	u8 *val = _val;
+	int i = 0, words = bytes;
+
+	while (words--)
+		*val++ = readb(priv->base + reg + i++);
+
+	return 0;
+}
+
+static struct nvmem_config econfig = {
+	.name = "qfprom",
+	.stride = 1,
+	.word_size = 1,
+	.reg_read = qfprom_reg_read,
+};
+
+static int qfprom_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct nvmem_device *nvmem;
+	struct qfprom_priv *priv;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(priv->base))
+		return PTR_ERR(priv->base);
+
+	econfig.size = resource_size(res);
+	econfig.dev = dev;
+	econfig.priv = priv;
+
+	nvmem = devm_nvmem_register(dev, &econfig);
+
+	return PTR_ERR_OR_ZERO(nvmem);
+}
+
+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,
+	.driver = {
+		.name = "qcom,qfprom",
+		.of_match_table = qfprom_of_match,
+	},
+};
+module_platform_driver(qfprom_driver);
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");
+MODULE_DESCRIPTION("Qualcomm QFPROM driver");
+MODULE_LICENSE("GPL v2");