These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / nvmem / qfprom.c

diff --git a/kernel/drivers/nvmem/qfprom.c b/kernel/drivers/nvmem/qfprom.c
new file mode 100644 (file)
index 0000000..afb67e7
--- /dev/null
+++ b/kernel/drivers/nvmem/qfprom.c
@@ -0,0 +1,85 @@
+/*
+ * 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/nvmem-provider.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+static struct regmap_config qfprom_regmap_config = {
+       .reg_bits = 32,
+       .val_bits = 8,
+       .reg_stride = 1,
+};
+
+static struct nvmem_config econfig = {
+       .name = "qfprom",
+       .owner = THIS_MODULE,
+};
+
+static int qfprom_remove(struct platform_device *pdev)
+{
+       struct nvmem_device *nvmem = platform_get_drvdata(pdev);
+
+       return nvmem_unregister(nvmem);
+}
+
+static int qfprom_probe(struct platform_device *pdev)
+{
+       struct device *dev = &pdev->dev;
+       struct resource *res;
+       struct nvmem_device *nvmem;
+       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);
+
+       qfprom_regmap_config.max_register = resource_size(res) - 1;
+
+       regmap = devm_regmap_init_mmio(dev, base, &qfprom_regmap_config);
+       if (IS_ERR(regmap)) {
+               dev_err(dev, "regmap init failed\n");
+               return PTR_ERR(regmap);
+       }
+       econfig.dev = dev;
+       nvmem = nvmem_register(&econfig);
+       if (IS_ERR(nvmem))
+               return PTR_ERR(nvmem);
+
+       platform_set_drvdata(pdev, nvmem);
+
+       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 <srinivas.kandagatla@linaro.org>");
+MODULE_DESCRIPTION("Qualcomm QFPROM driver");
+MODULE_LICENSE("GPL v2");