drivers/mfd/tps65912-spi.c

   1 /*
   2  * SPI access driver for TI TPS65912x PMICs
   3  *
   4  * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
   5  *      Andrew F. Davis <afd@ti.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  12  * kind, whether expressed or implied; without even the implied warranty
  13  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License version 2 for more details.
  15  *
  16  * Based on the TPS65218 driver and the previous TPS65912 driver by
  17  * Margarita Olaya Cabrera <magi@slimlogic.co.uk>
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/regmap.h>
  22 #include <linux/spi/spi.h>
  23
  24 #include <linux/mfd/tps65912.h>
  25
  26 static const struct of_device_id tps65912_spi_of_match_table[] = {
  27         { .compatible = "ti,tps65912", },
  28         { /* sentinel */ }
  29 };
  30 MODULE_DEVICE_TABLE(of, tps65912_spi_of_match_table);
  31
  32 static int tps65912_spi_probe(struct spi_device *spi)
  33 {
  34         struct tps65912 *tps;
  35
  36         tps = devm_kzalloc(&spi->dev, sizeof(*tps), GFP_KERNEL);
  37         if (!tps)
  38                 return -ENOMEM;
  39
  40         spi_set_drvdata(spi, tps);
  41         tps->dev = &spi->dev;
  42         tps->irq = spi->irq;
  43
  44         tps->regmap = devm_regmap_init_spi(spi, &tps65912_regmap_config);
  45         if (IS_ERR(tps->regmap)) {
  46                 dev_err(tps->dev, "Failed to initialize register map\n");
  47                 return PTR_ERR(tps->regmap);
  48         }
  49
  50         return tps65912_device_init(tps);
  51 }
  52
  53 static int tps65912_spi_remove(struct spi_device *spi)
  54 {
  55         struct tps65912 *tps = spi_get_drvdata(spi);
  56
  57         return tps65912_device_exit(tps);
  58 }
  59
  60 static const struct spi_device_id tps65912_spi_id_table[] = {
  61         { "tps65912", 0 },
  62         { /* sentinel */ }
  63 };
  64 MODULE_DEVICE_TABLE(spi, tps65912_spi_id_table);
  65
  66 static struct spi_driver tps65912_spi_driver = {
  67         .driver         = {
  68                 .name   = "tps65912",
  69                 .of_match_table = tps65912_spi_of_match_table,
  70         },
  71         .probe          = tps65912_spi_probe,
  72         .remove         = tps65912_spi_remove,
  73         .id_table       = tps65912_spi_id_table,
  74 };
  75 module_spi_driver(tps65912_spi_driver);
  76
  77 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
  78 MODULE_DESCRIPTION("TPS65912x SPI Interface Driver");
  79 MODULE_LICENSE("GPL v2");