drivers/tty/serial/sc16is7xx_i2c.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /* SC16IS7xx I2C interface driver */
   3
   4 #include <linux/dev_printk.h>
   5 #include <linux/i2c.h>
   6 #include <linux/mod_devicetable.h>
   7 #include <linux/module.h>
   8 #include <linux/regmap.h>
   9 #include <linux/string.h>
  10
  11 #include "sc16is7xx.h"
  12
  13 static int sc16is7xx_i2c_probe(struct i2c_client *i2c)
  14 {
  15         const struct sc16is7xx_devtype *devtype;
  16         struct regmap *regmaps[SC16IS7XX_MAX_PORTS];
  17         struct regmap_config regcfg;
  18         unsigned int i;
  19
  20         devtype = i2c_get_match_data(i2c);
  21         if (!devtype)
  22                 return dev_err_probe(&i2c->dev, -ENODEV, "Failed to match device\n");
  23
  24         memcpy(&regcfg, &sc16is7xx_regcfg, sizeof(struct regmap_config));
  25
  26         for (i = 0; i < devtype->nr_uart; i++) {
  27                 regcfg.name = sc16is7xx_regmap_name(i);
  28                 regcfg.read_flag_mask = sc16is7xx_regmap_port_mask(i);
  29                 regcfg.write_flag_mask = sc16is7xx_regmap_port_mask(i);
  30                 regmaps[i] = devm_regmap_init_i2c(i2c, &regcfg);
  31         }
  32
  33         return sc16is7xx_probe(&i2c->dev, devtype, regmaps, i2c->irq);
  34 }
  35
  36 static void sc16is7xx_i2c_remove(struct i2c_client *client)
  37 {
  38         sc16is7xx_remove(&client->dev);
  39 }
  40
  41 static const struct i2c_device_id sc16is7xx_i2c_id_table[] = {
  42         { "sc16is74x",  (kernel_ulong_t)&sc16is74x_devtype, },
  43         { "sc16is740",  (kernel_ulong_t)&sc16is74x_devtype, },
  44         { "sc16is741",  (kernel_ulong_t)&sc16is74x_devtype, },
  45         { "sc16is750",  (kernel_ulong_t)&sc16is750_devtype, },
  46         { "sc16is752",  (kernel_ulong_t)&sc16is752_devtype, },
  47         { "sc16is760",  (kernel_ulong_t)&sc16is760_devtype, },
  48         { "sc16is762",  (kernel_ulong_t)&sc16is762_devtype, },
  49         { }
  50 };
  51 MODULE_DEVICE_TABLE(i2c, sc16is7xx_i2c_id_table);
  52
  53 static struct i2c_driver sc16is7xx_i2c_driver = {
  54         .driver = {
  55                 .name           = SC16IS7XX_NAME,
  56                 .of_match_table = sc16is7xx_dt_ids,
  57         },
  58         .probe          = sc16is7xx_i2c_probe,
  59         .remove         = sc16is7xx_i2c_remove,
  60         .id_table       = sc16is7xx_i2c_id_table,
  61 };
  62
  63 module_i2c_driver(sc16is7xx_i2c_driver);
  64
  65 MODULE_LICENSE("GPL");
  66 MODULE_DESCRIPTION("SC16IS7xx I2C interface driver");
  67 MODULE_IMPORT_NS("SERIAL_NXP_SC16IS7XX");