On 16/06/15 23:58, Stephen Boyd wrote:

On 05/21/2015 09:44 AM, Srinivas Kandagatla wrote:

quoted

diff --git a/drivers/nvmem/nvmem-mmio.c b/drivers/nvmem/nvmem-mmio.c
new file mode 100644
index 0000000..0d8131f
--- /dev/null
+++ b/drivers/nvmem/nvmem-mmio.c

@@ -0,0 +1,69 @@
+/*
+ * 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/err.h>
+#include <linux/of.h>
+#include <linux/of_device.h>

#include <linux/platform_device.h>
#include <linux/nvmem_provider.h>
#include <linux/regmap.h>

These are included in nvmem-mmio.h, however for clarity sake I could add 
them here too.

quoted

+#include "nvmem-mmio.h"
+
+int nvmem_mmio_remove(struct platform_device *pdev)
+{
+	struct nvmem_device *nvmem = platform_get_drvdata(pdev);
+
+	return nvmem_unregister(nvmem);
+}
+EXPORT_SYMBOL_GPL(nvmem_mmio_remove);
+
+int nvmem_mmio_probe(struct platform_device *pdev)
+{
+

[...]

quoted

+
+	platform_set_drvdata(pdev, nvmem);

It may be better to return the nvmem device instead so that the one
drvdata member is usable by the calling driver.

Makes sense.. I will give it a try.

quoted

+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(nvmem_mmio_probe);

Kernel-doc on these exported functions?

Yep, thanks for spotting, I will fix it.

quoted

diff --git a/drivers/nvmem/nvmem-mmio.h b/drivers/nvmem/nvmem-mmio.h
new file mode 100644
index 0000000..a2ad4e5
--- /dev/null
+++ b/drivers/nvmem/nvmem-mmio.h

@@ -0,0 +1,41 @@
+/*
+ * MMIO based nvmem providers.
+ *
+ * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef _LINUX_NVMEM_MMIO_H
+#define _LINUX_NVMEM_MMIO_H
+
+#include <linux/platform_device.h>

Forward declare struct platform_device instead.

quoted

+#include <linux/nvmem-provider.h>

Forward declare nvmem_config instead.

quoted

+#include <linux/regmap.h>

Forward declare regmap_config instead.

quoted

+
+struct nvmem_mmio_data {
+	struct regmap_config *regmap_config;
+	struct nvmem_config *nvmem_config;
+};
+
+#if IS_ENABLED(CONFIG_NVMEM)
+
+int nvmem_mmio_probe(struct platform_device *pdev);
+int nvmem_mmio_remove(struct platform_device *pdev);