1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/mfd/arizona-spi.c b/drivers/mfd/arizona-spi.c
new file mode 100644
index 000000000..2633e147b
--- /dev/null
+++ b/drivers/mfd/arizona-spi.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * arizona-spi.c  --  Arizona SPI bus interface
+ *
+ * Copyright 2012 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ */
+
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/of.h>
+
+#include <linux/mfd/arizona/core.h>
+
+#include "arizona.h"
+
+static int arizona_spi_probe(struct spi_device *spi)
+{
+	const struct spi_device_id *id = spi_get_device_id(spi);
+	struct arizona *arizona;
+	const struct regmap_config *regmap_config = NULL;
+	unsigned long type;
+	int ret;
+
+	if (spi->dev.of_node)
+		type = arizona_of_get_type(&spi->dev);
+	else
+		type = id->driver_data;
+
+	switch (type) {
+	case WM5102:
+		if (IS_ENABLED(CONFIG_MFD_WM5102))
+			regmap_config = &wm5102_spi_regmap;
+		break;
+	case WM5110:
+	case WM8280:
+		if (IS_ENABLED(CONFIG_MFD_WM5110))
+			regmap_config = &wm5110_spi_regmap;
+		break;
+	case WM1831:
+	case CS47L24:
+		if (IS_ENABLED(CONFIG_MFD_CS47L24))
+			regmap_config = &cs47l24_spi_regmap;
+		break;
+	default:
+		dev_err(&spi->dev, "Unknown device type %ld\n", type);
+		return -EINVAL;
+	}
+
+	if (!regmap_config) {
+		dev_err(&spi->dev,
+			"No kernel support for device type %ld\n", type);
+		return -EINVAL;
+	}
+
+	arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
+	if (arizona == NULL)
+		return -ENOMEM;
+
+	arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
+	if (IS_ERR(arizona->regmap)) {
+		ret = PTR_ERR(arizona->regmap);
+		dev_err(&spi->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	arizona->type = type;
+	arizona->dev = &spi->dev;
+	arizona->irq = spi->irq;
+
+	return arizona_dev_init(arizona);
+}
+
+static int arizona_spi_remove(struct spi_device *spi)
+{
+	struct arizona *arizona = spi_get_drvdata(spi);
+
+	arizona_dev_exit(arizona);
+
+	return 0;
+}
+
+static const struct spi_device_id arizona_spi_ids[] = {
+	{ "wm5102", WM5102 },
+	{ "wm5110", WM5110 },
+	{ "wm8280", WM8280 },
+	{ "wm1831", WM1831 },
+	{ "cs47l24", CS47L24 },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
+
+static struct spi_driver arizona_spi_driver = {
+	.driver = {
+		.name	= "arizona",
+		.pm	= &arizona_pm_ops,
+		.of_match_table	= of_match_ptr(arizona_of_match),
+	},
+	.probe		= arizona_spi_probe,
+	.remove		= arizona_spi_remove,
+	.id_table	= arizona_spi_ids,
+};
+
+module_spi_driver(arizona_spi_driver);
+
+MODULE_DESCRIPTION("Arizona SPI bus interface");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");