Re: [PATCH v3 2/8] mfd: MT6397: Add support for PMIC MT6397 MFD

+++ b/drivers/mfd/mt6397-core.c

@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2014 MediaTek Inc.
+ * Author: Flora Fu <flora.fu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.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 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/module.h>
+#include <linux/of_device.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/mt6397/core.h>
+#include <linux/soc/mediatek/mtk-pmic-wrap.h>
+
+static const struct mfd_cell mt6397_devs[] = {
+	{ .name = "mt6397-rtc" },
+	{
+		.name = "mt6397-regulator",
+		.of_compatible = "mediatek,mt6397-regulator",
+	},
+	{
+		.name = "mt6397-codec",
+		.of_compatible = "mediatek,mt6397-codec",
+	},
+};
+
+static int mt6397_probe(struct platform_device *pdev)
+{
+	u32 ret;
+	struct mt6397_chip *mt6397;
+	struct pmic_wrapper *wrp;
+
+	/* mt6397 MFD is child device of soc pmic wrapper. */
+	if (!pdev->dev.parent)
+		return -ENODEV;
+
+	wrp = dev_get_drvdata(pdev->dev.parent);

+	mt6397 = devm_kzalloc(&pdev->dev, sizeof(*mt6397), GFP_KERNEL);
+	if (!mt6397)
+		return -ENOMEM;
+
+	mt6397->dev = &pdev->dev;
+	mt6397->regmap = wrp->regmap;

+	platform_set_drvdata(pdev, mt6397);
+
+	ret = mfd_add_devices(&pdev->dev, -1, &mt6397_devs[0],

+			ARRAY_SIZE(mt6397_devs), NULL, 0, NULL);
+	if (ret)
+		dev_err(&pdev->dev, "failed to add child devices: %d\n", ret);