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72e341c48f
The range of registers used by this driver exceeds that available via SPI with no paging (127), so we have to override the values from the default config which is set-up for I2C access. Also change SPI settings to match device's recommended OTP values. Signed-off-by: Adam Ward <adam.ward.opensource@diasemi.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
116 lines
2.5 KiB
C
116 lines
2.5 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_rw = 1;
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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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ret = da9052_device_init(da9052, id->driver_data);
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if (ret != 0)
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return ret;
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return 0;
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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 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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.owner = THIS_MODULE,
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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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