1 /* 2 * SPI driver for hmc5983 3 * 4 * Copyright (C) Josef Gajdusek <atx@atx.name> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <linux/module.h> 12 #include <linux/spi/spi.h> 13 #include <linux/iio/iio.h> 14 15 #include "hmc5843.h" 16 17 static const struct regmap_range hmc5843_readable_ranges[] = { 18 regmap_reg_range(0, HMC5843_ID_END), 19 }; 20 21 static const struct regmap_access_table hmc5843_readable_table = { 22 .yes_ranges = hmc5843_readable_ranges, 23 .n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges), 24 }; 25 26 static const struct regmap_range hmc5843_writable_ranges[] = { 27 regmap_reg_range(0, HMC5843_MODE_REG), 28 }; 29 30 static const struct regmap_access_table hmc5843_writable_table = { 31 .yes_ranges = hmc5843_writable_ranges, 32 .n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges), 33 }; 34 35 static const struct regmap_range hmc5843_volatile_ranges[] = { 36 regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG), 37 }; 38 39 static const struct regmap_access_table hmc5843_volatile_table = { 40 .yes_ranges = hmc5843_volatile_ranges, 41 .n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges), 42 }; 43 44 static const struct regmap_config hmc5843_spi_regmap_config = { 45 .reg_bits = 8, 46 .val_bits = 8, 47 48 .rd_table = &hmc5843_readable_table, 49 .wr_table = &hmc5843_writable_table, 50 .volatile_table = &hmc5843_volatile_table, 51 52 /* Autoincrement address pointer */ 53 .read_flag_mask = 0xc0, 54 55 .cache_type = REGCACHE_RBTREE, 56 }; 57 58 static int hmc5843_spi_probe(struct spi_device *spi) 59 { 60 int ret; 61 const struct spi_device_id *id = spi_get_device_id(spi); 62 63 spi->mode = SPI_MODE_3; 64 spi->max_speed_hz = 8000000; 65 spi->bits_per_word = 8; 66 ret = spi_setup(spi); 67 if (ret) 68 return ret; 69 70 return hmc5843_common_probe(&spi->dev, 71 devm_regmap_init_spi(spi, &hmc5843_spi_regmap_config), 72 id->driver_data, id->name); 73 } 74 75 static int hmc5843_spi_remove(struct spi_device *spi) 76 { 77 return hmc5843_common_remove(&spi->dev); 78 } 79 80 static const struct spi_device_id hmc5843_id[] = { 81 { "hmc5983", HMC5983_ID }, 82 { } 83 }; 84 MODULE_DEVICE_TABLE(spi, hmc5843_id); 85 86 static struct spi_driver hmc5843_driver = { 87 .driver = { 88 .name = "hmc5843", 89 .pm = HMC5843_PM_OPS, 90 }, 91 .id_table = hmc5843_id, 92 .probe = hmc5843_spi_probe, 93 .remove = hmc5843_spi_remove, 94 }; 95 96 module_spi_driver(hmc5843_driver); 97 98 MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>"); 99 MODULE_DESCRIPTION("HMC5983 SPI driver"); 100 MODULE_LICENSE("GPL"); 101