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 9 static 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 24 static 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 43 static const struct regmap_bus regmap_i3c = { 44 .write = regmap_i3c_write, 45 .read = regmap_i3c_read, 46 }; 47 48 struct 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, ®map_i3c, &i3c->dev, config, 54 lock_key, lock_name); 55 } 56 EXPORT_SYMBOL_GPL(__devm_regmap_init_i3c); 57 58 MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>"); 59 MODULE_DESCRIPTION("Regmap I3C Module"); 60 MODULE_LICENSE("GPL v2"); 61