1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/mfd/da9052-spi.c b/drivers/mfd/da9052-spi.c
new file mode 100644
index 000000000..b79a57b45
--- /dev/null
+++ b/drivers/mfd/da9052-spi.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * SPI access for Dialog DA9052 PMICs.
+ *
+ * Copyright(c) 2011 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@diasemi.com>
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/mfd/core.h>
+#include <linux/spi/spi.h>
+#include <linux/err.h>
+
+#include <linux/mfd/da9052/da9052.h>
+
+static int da9052_spi_probe(struct spi_device *spi)
+{
+	struct regmap_config config;
+	int ret;
+	const struct spi_device_id *id = spi_get_device_id(spi);
+	struct da9052 *da9052;
+
+	da9052 = devm_kzalloc(&spi->dev, sizeof(struct da9052), GFP_KERNEL);
+	if (!da9052)
+		return -ENOMEM;
+
+	spi->mode = SPI_MODE_0;
+	spi->bits_per_word = 8;
+	spi_setup(spi);
+
+	da9052->dev = &spi->dev;
+	da9052->chip_irq = spi->irq;
+
+	spi_set_drvdata(spi, da9052);
+
+	config = da9052_regmap_config;
+	config.read_flag_mask = 1;
+	config.reg_bits = 7;
+	config.pad_bits = 1;
+	config.val_bits = 8;
+	config.use_single_read = true;
+	config.use_single_write = true;
+
+	da9052->regmap = devm_regmap_init_spi(spi, &config);
+	if (IS_ERR(da9052->regmap)) {
+		ret = PTR_ERR(da9052->regmap);
+		dev_err(&spi->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	return da9052_device_init(da9052, id->driver_data);
+}
+
+static void da9052_spi_remove(struct spi_device *spi)
+{
+	struct da9052 *da9052 = spi_get_drvdata(spi);
+
+	da9052_device_exit(da9052);
+}
+
+static const struct spi_device_id da9052_spi_id[] = {
+	{"da9052", DA9052},
+	{"da9053-aa", DA9053_AA},
+	{"da9053-ba", DA9053_BA},
+	{"da9053-bb", DA9053_BB},
+	{"da9053-bc", DA9053_BC},
+	{}
+};
+
+static struct spi_driver da9052_spi_driver = {
+	.probe = da9052_spi_probe,
+	.remove = da9052_spi_remove,
+	.id_table = da9052_spi_id,
+	.driver = {
+		.name = "da9052",
+	},
+};
+
+static int __init da9052_spi_init(void)
+{
+	int ret;
+
+	ret = spi_register_driver(&da9052_spi_driver);
+	if (ret != 0) {
+		pr_err("Failed to register DA9052 SPI driver, %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+subsys_initcall(da9052_spi_init);
+
+static void __exit da9052_spi_exit(void)
+{
+	spi_unregister_driver(&da9052_spi_driver);
+}
+module_exit(da9052_spi_exit);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
+MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
+MODULE_LICENSE("GPL");