diff options
author | Richard Fitzgerald <rf@opensource.cirrus.com> | 2018-05-21 10:59:56 +0100 |
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committer | Lee Jones <lee.jones@linaro.org> | 2018-06-05 11:14:56 +0100 |
commit | 16b27467f46c1e0dbf093f53971aeb5decbaff4e (patch) | |
tree | 585644f02c55a33c2c24645f10d8c057c5726369 /drivers/mfd/madera-i2c.c | |
parent | 2b49088cdba7dd59693887532e4058ee33b42d87 (diff) |
mfd: madera: Add common support for Cirrus Logic Madera codecs
This adds the generic core support for Cirrus Logic "Madera" class codecs.
These are complex audio codec SoCs with a variety of digital and analogue
I/O, onboard audio processing and DSPs, and other features.
These codecs are all based off a common set of hardware IP so can be
supported by a core of common code (with a few minor device-to-device
variations).
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Nikesh Oswal <Nikesh.Oswal@cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd/madera-i2c.c')
-rw-r--r-- | drivers/mfd/madera-i2c.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/drivers/mfd/madera-i2c.c b/drivers/mfd/madera-i2c.c new file mode 100644 index 000000000000..05ae94be01d8 --- /dev/null +++ b/drivers/mfd/madera-i2c.c @@ -0,0 +1,140 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * I2C bus interface to Cirrus Logic Madera codecs + * + * Copyright (C) 2015-2018 Cirrus Logic + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by the + * Free Software Foundation; version 2. + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/regmap.h> + +#include <linux/mfd/madera/core.h> + +#include "madera.h" + +static int madera_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct madera *madera; + const struct regmap_config *regmap_16bit_config = NULL; + const struct regmap_config *regmap_32bit_config = NULL; + const void *of_data; + unsigned long type; + const char *name; + int ret; + + of_data = of_device_get_match_data(&i2c->dev); + if (of_data) + type = (unsigned long)of_data; + else + type = id->driver_data; + + switch (type) { + case CS47L35: + if (IS_ENABLED(CONFIG_MFD_CS47L35)) { + regmap_16bit_config = &cs47l35_16bit_i2c_regmap; + regmap_32bit_config = &cs47l35_32bit_i2c_regmap; + } + break; + case CS47L85: + case WM1840: + if (IS_ENABLED(CONFIG_MFD_CS47L85)) { + regmap_16bit_config = &cs47l85_16bit_i2c_regmap; + regmap_32bit_config = &cs47l85_32bit_i2c_regmap; + } + break; + case CS47L90: + case CS47L91: + if (IS_ENABLED(CONFIG_MFD_CS47L90)) { + regmap_16bit_config = &cs47l90_16bit_i2c_regmap; + regmap_32bit_config = &cs47l90_32bit_i2c_regmap; + } + break; + default: + dev_err(&i2c->dev, + "Unknown Madera I2C device type %ld\n", type); + return -EINVAL; + } + + name = madera_name_from_type(type); + + if (!regmap_16bit_config) { + /* it's polite to say which codec isn't built into the kernel */ + dev_err(&i2c->dev, + "Kernel does not include support for %s\n", name); + return -EINVAL; + } + + madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL); + if (!madera) + return -ENOMEM; + + + madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config); + if (IS_ERR(madera->regmap)) { + ret = PTR_ERR(madera->regmap); + dev_err(&i2c->dev, + "Failed to allocate 16-bit register map: %d\n", ret); + return ret; + } + + madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config); + if (IS_ERR(madera->regmap_32bit)) { + ret = PTR_ERR(madera->regmap_32bit); + dev_err(&i2c->dev, + "Failed to allocate 32-bit register map: %d\n", ret); + return ret; + } + + madera->type = type; + madera->type_name = name; + madera->dev = &i2c->dev; + madera->irq = i2c->irq; + + return madera_dev_init(madera); +} + +static int madera_i2c_remove(struct i2c_client *i2c) +{ + struct madera *madera = dev_get_drvdata(&i2c->dev); + + madera_dev_exit(madera); + + return 0; +} + +static const struct i2c_device_id madera_i2c_id[] = { + { "cs47l35", CS47L35 }, + { "cs47l85", CS47L85 }, + { "cs47l90", CS47L90 }, + { "cs47l91", CS47L91 }, + { "wm1840", WM1840 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, madera_i2c_id); + +static struct i2c_driver madera_i2c_driver = { + .driver = { + .name = "madera", + .pm = &madera_pm_ops, + .of_match_table = of_match_ptr(madera_of_match), + }, + .probe = madera_i2c_probe, + .remove = madera_i2c_remove, + .id_table = madera_i2c_id, +}; + +module_i2c_driver(madera_i2c_driver); + +MODULE_DESCRIPTION("Madera I2C bus interface"); +MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); +MODULE_LICENSE("GPL v2"); |