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89 lines
2.1 KiB
89 lines
2.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// Copyright(c) 2015-17 Intel Corporation. |
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#include <linux/device.h> |
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#include <linux/errno.h> |
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#include <linux/module.h> |
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#include <linux/regmap.h> |
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#include <linux/soundwire/sdw.h> |
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#include "internal.h" |
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static int regmap_sdw_write(void *context, unsigned int reg, unsigned int val) |
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{ |
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struct device *dev = context; |
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struct sdw_slave *slave = dev_to_sdw_dev(dev); |
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return sdw_write_no_pm(slave, reg, val); |
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} |
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static int regmap_sdw_read(void *context, unsigned int reg, unsigned int *val) |
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{ |
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struct device *dev = context; |
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struct sdw_slave *slave = dev_to_sdw_dev(dev); |
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int read; |
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read = sdw_read_no_pm(slave, reg); |
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if (read < 0) |
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return read; |
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*val = read; |
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return 0; |
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} |
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static const struct regmap_bus regmap_sdw = { |
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.reg_read = regmap_sdw_read, |
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.reg_write = regmap_sdw_write, |
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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 int regmap_sdw_config_check(const struct regmap_config *config) |
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{ |
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/* All register are 8-bits wide as per MIPI Soundwire 1.0 Spec */ |
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if (config->val_bits != 8) |
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return -ENOTSUPP; |
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/* Registers are 32 bits wide */ |
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if (config->reg_bits != 32) |
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return -ENOTSUPP; |
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if (config->pad_bits != 0) |
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return -ENOTSUPP; |
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return 0; |
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} |
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struct regmap *__regmap_init_sdw(struct sdw_slave *sdw, |
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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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int ret; |
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ret = regmap_sdw_config_check(config); |
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if (ret) |
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return ERR_PTR(ret); |
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return __regmap_init(&sdw->dev, ®map_sdw, |
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&sdw->dev, config, lock_key, lock_name); |
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} |
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EXPORT_SYMBOL_GPL(__regmap_init_sdw); |
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struct regmap *__devm_regmap_init_sdw(struct sdw_slave *sdw, |
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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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int ret; |
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ret = regmap_sdw_config_check(config); |
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if (ret) |
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return ERR_PTR(ret); |
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return __devm_regmap_init(&sdw->dev, ®map_sdw, |
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&sdw->dev, config, lock_key, lock_name); |
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} |
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EXPORT_SYMBOL_GPL(__devm_regmap_init_sdw); |
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MODULE_DESCRIPTION("Regmap SoundWire Module"); |
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MODULE_LICENSE("GPL v2");
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