LXR linux/drivers/base/regmap/regmap-i3c.c

   1// SPDX-License-Identifier: GPL-2.0
   2// Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
   3
   4#include <linux/regmap.h>
   5#include <linux/i3c/device.h>
   6#include <linux/i3c/master.h>
   7#include <linux/module.h>
   8
   9static int regmap_i3c_write(void *context, const void *data, size_t count)
  10{
  11        struct device *dev = context;
  12        struct i3c_device *i3c = dev_to_i3cdev(dev);
  13        struct i3c_priv_xfer xfers[] = {
  14                {
  15                        .rnw = false,
  16                        .len = count,
  17                        .data.out = data,
  18                },
  19        };
  20
  21        return i3c_device_do_priv_xfers(i3c, xfers, 1);
  22}
  23
  24static int regmap_i3c_read(void *context,
  25                           const void *reg, size_t reg_size,
  26                           void *val, size_t val_size)
  27{
  28        struct device *dev = context;
  29        struct i3c_device *i3c = dev_to_i3cdev(dev);
  30        struct i3c_priv_xfer xfers[2];
  31
  32        xfers[0].rnw = false;
  33        xfers[0].len = reg_size;
  34        xfers[0].data.out = reg;
  35
  36        xfers[1].rnw = true;
  37        xfers[1].len = val_size;
  38        xfers[1].data.in = val;
  39
  40        return i3c_device_do_priv_xfers(i3c, xfers, 2);
  41}
  42
  43static struct regmap_bus regmap_i3c = {
  44        .write = regmap_i3c_write,
  45        .read = regmap_i3c_read,
  46};
  47
  48struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c,
  49                                      const struct regmap_config *config,
  50                                      struct lock_class_key *lock_key,
  51                                      const char *lock_name)
  52{
  53        return __devm_regmap_init(&i3c->dev, &regmap_i3c, &i3c->dev, config,
  54                                  lock_key, lock_name);
  55}
  56EXPORT_SYMBOL_GPL(__devm_regmap_init_i3c);
  57
  58MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
  59MODULE_DESCRIPTION("Regmap I3C Module");
  60MODULE_LICENSE("GPL v2");
  61