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178 lines
4.3 KiB
178 lines
4.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Intel SoC PMIC MFD Driver |
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* |
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* Copyright (C) 2013, 2014 Intel Corporation. All rights reserved. |
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* |
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* Author: Yang, Bin <[email protected]> |
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* Author: Zhu, Lejun <[email protected]> |
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*/ |
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#include <linux/acpi.h> |
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#include <linux/i2c.h> |
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#include <linux/interrupt.h> |
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#include <linux/module.h> |
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#include <linux/mfd/core.h> |
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#include <linux/mfd/intel_soc_pmic.h> |
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#include <linux/pwm.h> |
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#include <linux/regmap.h> |
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#include "intel_soc_pmic_core.h" |
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/* Crystal Cove PMIC shares same ACPI ID between different platforms */ |
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#define BYT_CRC_HRV 2 |
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#define CHT_CRC_HRV 3 |
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/* PWM consumed by the Intel GFX */ |
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static struct pwm_lookup crc_pwm_lookup[] = { |
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PWM_LOOKUP("crystal_cove_pwm", 0, "0000:00:02.0", "pwm_pmic_backlight", 0, PWM_POLARITY_NORMAL), |
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}; |
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static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c, |
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const struct i2c_device_id *i2c_id) |
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{ |
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struct device *dev = &i2c->dev; |
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struct intel_soc_pmic_config *config; |
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struct intel_soc_pmic *pmic; |
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unsigned long long hrv; |
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acpi_status status; |
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int ret; |
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/* |
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* There are 2 different Crystal Cove PMICs a Bay Trail and Cherry |
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* Trail version, use _HRV to differentiate between the 2. |
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*/ |
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status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_HRV", NULL, &hrv); |
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if (ACPI_FAILURE(status)) { |
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dev_err(dev, "Failed to get PMIC hardware revision\n"); |
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return -ENODEV; |
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} |
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switch (hrv) { |
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case BYT_CRC_HRV: |
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config = &intel_soc_pmic_config_byt_crc; |
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break; |
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case CHT_CRC_HRV: |
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config = &intel_soc_pmic_config_cht_crc; |
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break; |
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default: |
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dev_warn(dev, "Unknown hardware rev %llu, assuming BYT\n", hrv); |
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config = &intel_soc_pmic_config_byt_crc; |
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} |
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pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL); |
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if (!pmic) |
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return -ENOMEM; |
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dev_set_drvdata(dev, pmic); |
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pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config); |
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if (IS_ERR(pmic->regmap)) |
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return PTR_ERR(pmic->regmap); |
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pmic->irq = i2c->irq; |
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ret = regmap_add_irq_chip(pmic->regmap, pmic->irq, |
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config->irq_flags | IRQF_ONESHOT, |
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0, config->irq_chip, |
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&pmic->irq_chip_data); |
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if (ret) |
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return ret; |
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ret = enable_irq_wake(pmic->irq); |
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if (ret) |
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dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret); |
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/* Add lookup table for crc-pwm */ |
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pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup)); |
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ret = mfd_add_devices(dev, -1, config->cell_dev, |
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config->n_cell_devs, NULL, 0, |
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regmap_irq_get_domain(pmic->irq_chip_data)); |
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if (ret) |
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goto err_del_irq_chip; |
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return 0; |
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err_del_irq_chip: |
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regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data); |
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return ret; |
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} |
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static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c) |
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{ |
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struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev); |
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regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data); |
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/* remove crc-pwm lookup table */ |
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pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup)); |
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mfd_remove_devices(&i2c->dev); |
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return 0; |
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} |
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static void intel_soc_pmic_shutdown(struct i2c_client *i2c) |
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{ |
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struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev); |
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disable_irq(pmic->irq); |
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return; |
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} |
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#if defined(CONFIG_PM_SLEEP) |
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static int intel_soc_pmic_suspend(struct device *dev) |
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{ |
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struct intel_soc_pmic *pmic = dev_get_drvdata(dev); |
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disable_irq(pmic->irq); |
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return 0; |
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} |
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static int intel_soc_pmic_resume(struct device *dev) |
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{ |
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struct intel_soc_pmic *pmic = dev_get_drvdata(dev); |
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enable_irq(pmic->irq); |
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return 0; |
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} |
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#endif |
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static SIMPLE_DEV_PM_OPS(intel_soc_pmic_pm_ops, intel_soc_pmic_suspend, |
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intel_soc_pmic_resume); |
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static const struct i2c_device_id intel_soc_pmic_i2c_id[] = { |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, intel_soc_pmic_i2c_id); |
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#if defined(CONFIG_ACPI) |
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static const struct acpi_device_id intel_soc_pmic_acpi_match[] = { |
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{ "INT33FD" }, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(acpi, intel_soc_pmic_acpi_match); |
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#endif |
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static struct i2c_driver intel_soc_pmic_i2c_driver = { |
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.driver = { |
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.name = "intel_soc_pmic_i2c", |
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.pm = &intel_soc_pmic_pm_ops, |
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.acpi_match_table = ACPI_PTR(intel_soc_pmic_acpi_match), |
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}, |
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.probe = intel_soc_pmic_i2c_probe, |
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.remove = intel_soc_pmic_i2c_remove, |
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.id_table = intel_soc_pmic_i2c_id, |
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.shutdown = intel_soc_pmic_shutdown, |
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}; |
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module_i2c_driver(intel_soc_pmic_i2c_driver); |
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MODULE_DESCRIPTION("I2C driver for Intel SoC PMIC"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_AUTHOR("Yang, Bin <[email protected]>"); |
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MODULE_AUTHOR("Zhu, Lejun <[email protected]>");
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