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drivers/mfd/da9052-spi.c
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* * SPI access for Dialog DA9052 PMICs. * * Copyright(c) 2011 Dialog Semiconductor Ltd. * * Author: David Dajun Chen <dchen@diasemi.com> |
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*/ #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> |
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static int da9052_spi_probe(struct spi_device *spi) |
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{ |
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struct regmap_config config; |
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int ret; const struct spi_device_id *id = spi_get_device_id(spi); |
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struct da9052 *da9052; |
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da9052 = devm_kzalloc(&spi->dev, sizeof(struct da9052), GFP_KERNEL); |
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if (!da9052) return -ENOMEM; |
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spi->mode = SPI_MODE_0; |
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spi->bits_per_word = 8; spi_setup(spi); da9052->dev = &spi->dev; da9052->chip_irq = spi->irq; |
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spi_set_drvdata(spi, da9052); |
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config = da9052_regmap_config; config.read_flag_mask = 1; |
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config.reg_bits = 7; config.pad_bits = 1; config.val_bits = 8; |
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config.use_single_read = true; config.use_single_write = true; |
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da9052->regmap = devm_regmap_init_spi(spi, &config); |
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if (IS_ERR(da9052->regmap)) { ret = PTR_ERR(da9052->regmap); dev_err(&spi->dev, "Failed to allocate register map: %d ", ret); |
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return ret; |
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} |
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return da9052_device_init(da9052, id->driver_data); |
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} |
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static int da9052_spi_remove(struct spi_device *spi) |
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{ |
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struct da9052 *da9052 = spi_get_drvdata(spi); |
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da9052_device_exit(da9052); |
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return 0; } |
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static const struct spi_device_id da9052_spi_id[] = { |
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{"da9052", DA9052}, {"da9053-aa", DA9053_AA}, {"da9053-ba", DA9053_BA}, {"da9053-bb", DA9053_BB}, |
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{"da9053-bc", DA9053_BC}, |
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{} }; static struct spi_driver da9052_spi_driver = { .probe = da9052_spi_probe, |
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.remove = da9052_spi_remove, |
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.id_table = da9052_spi_id, .driver = { .name = "da9052", |
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}, }; 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 ", 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"); |