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71 lines
1.9 KiB
71 lines
1.9 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// Copyright (c) 2017, Linaro Ltd. |
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#include <linux/regmap.h> |
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#include <linux/slimbus.h> |
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#include <linux/module.h> |
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#include "internal.h" |
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static int regmap_slimbus_write(void *context, const void *data, size_t count) |
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{ |
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struct slim_device *sdev = context; |
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return slim_write(sdev, *(u16 *)data, count - 2, (u8 *)data + 2); |
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} |
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static int regmap_slimbus_read(void *context, const void *reg, size_t reg_size, |
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void *val, size_t val_size) |
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{ |
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struct slim_device *sdev = context; |
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return slim_read(sdev, *(u16 *)reg, val_size, val); |
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} |
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static struct regmap_bus regmap_slimbus_bus = { |
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.write = regmap_slimbus_write, |
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.read = regmap_slimbus_read, |
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.reg_format_endian_default = REGMAP_ENDIAN_LITTLE, |
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.val_format_endian_default = REGMAP_ENDIAN_LITTLE, |
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}; |
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static const struct regmap_bus *regmap_get_slimbus(struct slim_device *slim, |
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const struct regmap_config *config) |
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{ |
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if (config->val_bits == 8 && config->reg_bits == 16) |
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return ®map_slimbus_bus; |
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return ERR_PTR(-ENOTSUPP); |
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} |
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struct regmap *__regmap_init_slimbus(struct slim_device *slimbus, |
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const struct regmap_config *config, |
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struct lock_class_key *lock_key, |
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const char *lock_name) |
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{ |
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const struct regmap_bus *bus = regmap_get_slimbus(slimbus, config); |
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if (IS_ERR(bus)) |
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return ERR_CAST(bus); |
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return __regmap_init(&slimbus->dev, bus, &slimbus->dev, config, |
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lock_key, lock_name); |
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} |
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EXPORT_SYMBOL_GPL(__regmap_init_slimbus); |
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struct regmap *__devm_regmap_init_slimbus(struct slim_device *slimbus, |
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const struct regmap_config *config, |
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struct lock_class_key *lock_key, |
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const char *lock_name) |
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{ |
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const struct regmap_bus *bus = regmap_get_slimbus(slimbus, config); |
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if (IS_ERR(bus)) |
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return ERR_CAST(bus); |
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return __devm_regmap_init(&slimbus->dev, bus, &slimbus, config, |
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lock_key, lock_name); |
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} |
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EXPORT_SYMBOL_GPL(__devm_regmap_init_slimbus); |
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MODULE_LICENSE("GPL v2");
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