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1c96a2f67c
Split regmap_config.use_single_rw into use_single_read and use_single_write. This change enables drivers of devices which only support bulk operations in one direction to use the regmap_bulk_*() functions for both directions and have their bulk operation split into single operations only when necessary. Update all struct regmap_config instances where use_single_rw==true to instead set both use_single_read and use_single_write. No attempt was made to evaluate whether it is possible to set only one of use_single_read or use_single_write. Signed-off-by: David Frey <dpfrey@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
111 lines
2.4 KiB
C
111 lines
2.4 KiB
C
/*
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* SPI access for Dialog DA9052 PMICs.
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*
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* Copyright(c) 2011 Dialog Semiconductor Ltd.
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*
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* Author: David Dajun Chen <dchen@diasemi.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*/
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/input.h>
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#include <linux/mfd/core.h>
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#include <linux/spi/spi.h>
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#include <linux/err.h>
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#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;
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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)
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return -ENOMEM;
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spi->mode = SPI_MODE_0;
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spi->bits_per_word = 8;
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spi_setup(spi);
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da9052->dev = &spi->dev;
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da9052->chip_irq = spi->irq;
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spi_set_drvdata(spi, da9052);
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config = da9052_regmap_config;
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config.read_flag_mask = 1;
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config.reg_bits = 7;
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config.pad_bits = 1;
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config.val_bits = 8;
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config.use_single_read = true;
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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)) {
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ret = PTR_ERR(da9052->regmap);
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dev_err(&spi->dev, "Failed to allocate register map: %d\n",
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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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}
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static const struct spi_device_id da9052_spi_id[] = {
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{"da9052", DA9052},
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{"da9053-aa", DA9053_AA},
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{"da9053-ba", DA9053_BA},
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{"da9053-bb", DA9053_BB},
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{"da9053-bc", DA9053_BC},
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{}
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};
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static struct spi_driver da9052_spi_driver = {
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.probe = da9052_spi_probe,
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.remove = da9052_spi_remove,
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.id_table = da9052_spi_id,
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.driver = {
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.name = "da9052",
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},
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};
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static int __init da9052_spi_init(void)
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{
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int ret;
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ret = spi_register_driver(&da9052_spi_driver);
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if (ret != 0) {
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pr_err("Failed to register DA9052 SPI driver, %d\n", ret);
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return ret;
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}
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return 0;
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}
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subsys_initcall(da9052_spi_init);
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static void __exit da9052_spi_exit(void)
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{
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spi_unregister_driver(&da9052_spi_driver);
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}
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module_exit(da9052_spi_exit);
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MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
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MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
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MODULE_LICENSE("GPL");
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