commit a76f5088cc203adcfc12b46a43c736cd6c611445
Author: zhaoxc0502 <zhaoxc0502@thundersoft.com>
Date:   Thu Jun 16 17:23:23 2022 +0800

    linux_drivers_mfd
    
    Change-Id: I6657300647d765d5784880d32917e080e86881dc

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index b8847ae04..6b22d82a4 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -497,6 +497,17 @@ config MFD_MX25_TSADC
 	  i.MX25 processors. They consist of a conversion queue for general
 	  purpose ADC and a queue for Touchscreens.
 
+config MFD_IMX_MIX
+	tristate "NXP i.MX Generic Mix Control Driver"
+	depends on OF || COMPILE_TEST
+	help
+	  Enable generic mixes support. On some i.MX platforms, there are
+	  devices that are a mix of multiple functionalities like reset
+	  controllers, clock controllers and some others. In order to split
+	  those functionalities between the right drivers, this MFD populates
+	  with virtual devices based on what's found in the devicetree node,
+	  leaving the rest of the behavior control to the dedicated driver.
+
 config MFD_HI6421_PMIC
 	tristate "HiSilicon Hi6421 PMU/Codec IC"
 	depends on OF
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 1780019d2..23751252c 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -115,6 +115,7 @@ obj-$(CONFIG_MFD_TWL4030_AUDIO)	+= twl4030-audio.o
 obj-$(CONFIG_TWL6040_CORE)	+= twl6040.o
 
 obj-$(CONFIG_MFD_MX25_TSADC)	+= fsl-imx25-tsadc.o
+obj-$(CONFIG_MFD_IMX_MIX)	+= imx-mix.o
 
 obj-$(CONFIG_MFD_MC13XXX)	+= mc13xxx-core.o
 obj-$(CONFIG_MFD_MC13XXX_SPI)	+= mc13xxx-spi.o
diff --git a/drivers/mfd/imx-mix.c b/drivers/mfd/imx-mix.c
new file mode 100644
index 000000000..4ea456ffd
--- /dev/null
+++ b/drivers/mfd/imx-mix.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2019 NXP.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/of_platform.h>
+
+#include <linux/mfd/core.h>
+
+static int imx_mix_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	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);
+
+	dev_set_drvdata(dev, base);
+
+	return devm_of_platform_populate(dev);
+}
+
+static const struct of_device_id imx_mix_of_match[] = {
+	{ .compatible = "fsl,imx8mp-mix" },
+	{ /* Sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, imx_mix_of_match);
+
+static struct platform_driver imx_mix_driver = {
+	.probe = imx_mix_probe,
+	.driver = {
+		.name = "imx-mix",
+		.of_match_table = of_match_ptr(imx_mix_of_match),
+	},
+};
+module_platform_driver(imx_mix_driver);