| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | // |
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| 3 | // cs35l41-i2c.c -- CS35l41 I2C driver |
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| 4 | // |
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| 5 | // Copyright 2017-2021 Cirrus Logic, Inc. |
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| 6 | // |
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| 7 | // Author: David Rhodes <david.rhodes@cirrus.com> |
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| 8 | |
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| 9 | #include <linux/acpi.h> |
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| 10 | #include <linux/delay.h> |
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| 11 | #include <linux/i2c.h> |
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| 12 | #include <linux/init.h> |
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| 13 | #include <linux/kernel.h> |
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| 14 | #include <linux/module.h> |
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| 15 | #include <linux/moduleparam.h> |
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| 16 | #include <linux/of.h> |
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| 17 | #include <linux/platform_device.h> |
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| 18 | #include <linux/slab.h> |
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| 19 | |
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| 20 | #include "cs35l41.h" |
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| 21 | |
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| 22 | static const struct i2c_device_id cs35l41_id_i2c[] = { |
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| 23 | { "cs35l40" , 0 }, |
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| 24 | { "cs35l41" , 0 }, |
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| 25 | { "cs35l51" , 0 }, |
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| 26 | { "cs35l53" , 0 }, |
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| 27 | {} |
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| 28 | }; |
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| 29 | |
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| 30 | MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c); |
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| 31 | |
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| 32 | static int cs35l41_i2c_probe(struct i2c_client *client) |
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| 33 | { |
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| 34 | struct cs35l41_private *cs35l41; |
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| 35 | struct device *dev = &client->dev; |
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| 36 | struct cs35l41_hw_cfg *hw_cfg = dev_get_platdata(dev); |
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| 37 | const struct regmap_config *regmap_config = &cs35l41_regmap_i2c; |
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| 38 | |
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| 39 | cs35l41 = devm_kzalloc(dev, size: sizeof(struct cs35l41_private), GFP_KERNEL); |
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| 40 | |
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| 41 | if (!cs35l41) |
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| 42 | return -ENOMEM; |
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| 43 | |
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| 44 | cs35l41->dev = dev; |
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| 45 | cs35l41->irq = client->irq; |
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| 46 | |
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| 47 | i2c_set_clientdata(client, data: cs35l41); |
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| 48 | cs35l41->regmap = devm_regmap_init_i2c(client, regmap_config); |
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| 49 | if (IS_ERR(ptr: cs35l41->regmap)) |
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| 50 | return dev_err_probe(dev: cs35l41->dev, err: PTR_ERR(ptr: cs35l41->regmap), |
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| 51 | fmt: "Failed to allocate register map\n" ); |
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| 52 | |
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| 53 | return cs35l41_probe(cs35l41, hw_cfg); |
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| 54 | } |
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| 55 | |
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| 56 | static void cs35l41_i2c_remove(struct i2c_client *client) |
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| 57 | { |
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| 58 | struct cs35l41_private *cs35l41 = i2c_get_clientdata(client); |
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| 59 | |
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| 60 | cs35l41_remove(cs35l41); |
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| 61 | } |
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| 62 | |
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| 63 | #ifdef CONFIG_OF |
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| 64 | static const struct of_device_id cs35l41_of_match[] = { |
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| 65 | { .compatible = "cirrus,cs35l40" }, |
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| 66 | { .compatible = "cirrus,cs35l41" }, |
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| 67 | {}, |
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| 68 | }; |
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| 69 | MODULE_DEVICE_TABLE(of, cs35l41_of_match); |
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| 70 | #endif |
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| 71 | |
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| 72 | #ifdef CONFIG_ACPI |
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| 73 | static const struct acpi_device_id cs35l41_acpi_match[] = { |
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| 74 | { "CSC3541" , 0 }, /* Cirrus Logic PnP ID + part ID */ |
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| 75 | {}, |
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| 76 | }; |
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| 77 | MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match); |
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| 78 | #endif |
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| 79 | |
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| 80 | static struct i2c_driver cs35l41_i2c_driver = { |
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| 81 | .driver = { |
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| 82 | .name = "cs35l41" , |
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| 83 | .pm = pm_ptr(&cs35l41_pm_ops), |
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| 84 | .of_match_table = of_match_ptr(cs35l41_of_match), |
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| 85 | .acpi_match_table = ACPI_PTR(cs35l41_acpi_match), |
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| 86 | }, |
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| 87 | .id_table = cs35l41_id_i2c, |
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| 88 | .probe = cs35l41_i2c_probe, |
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| 89 | .remove = cs35l41_i2c_remove, |
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| 90 | }; |
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| 91 | |
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| 92 | module_i2c_driver(cs35l41_i2c_driver); |
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| 93 | |
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| 94 | MODULE_DESCRIPTION("I2C CS35L41 driver" ); |
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| 95 | MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>" ); |
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| 96 | MODULE_LICENSE("GPL" ); |
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| 97 | |
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