forked from Minki/linux
b01e9348e1
Both Bay and Cherry Trail devices may be used together with a Crystal Cove
PMIC. Each platform has its own variant of the PMIC, which both use the
same ACPI HID, but they are not 100% compatible.
This commits makes the intel_soc_pmic_core code check the _HRV of the
ACPI-firmware-node and selects intel_soc_pmic_config_byt_crc resp.
intel_soc_pmic_config_cht_crc based on this.
This fixes the Bay Trail specific ACPI OpRegion code causing problems
on Cherry Trail devices. Specifically this was causing the external
microsd slot on a Dell Venue 8 5855 (Cherry Trail version) to not work
and the eMMC to become unreliable and throw lots of errors.
Fixes: 5165238460
("mfd: intel_soc_pmic: Core driver")
Reported-and-tested-by: russianneuromancer <russianneuromancer@ya.ru>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
206 lines
5.3 KiB
C
206 lines
5.3 KiB
C
/*
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* intel_soc_pmic_core.c - 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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Author: Yang, Bin <bin.yang@intel.com>
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* Author: Zhu, Lejun <lejun.zhu@linux.intel.com>
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*/
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#include <linux/acpi.h>
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#include <linux/module.h>
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#include <linux/mfd/core.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/gpio/consumer.h>
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#include <linux/acpi.h>
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#include <linux/regmap.h>
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#include <linux/mfd/intel_soc_pmic.h>
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#include <linux/gpio/machine.h>
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#include <linux/pwm.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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/* Lookup table for the Panel Enable/Disable line as GPIO signals */
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static struct gpiod_lookup_table panel_gpio_table = {
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/* Intel GFX is consumer */
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.dev_id = "0000:00:02.0",
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.table = {
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/* Panel EN/DISABLE */
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GPIO_LOOKUP("gpio_crystalcove", 94, "panel", GPIO_ACTIVE_HIGH),
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{ },
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},
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};
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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_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 binding for Panel Control to the GPIO Chip */
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gpiod_add_lookup_table(&panel_gpio_table);
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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 lookup table for Panel Control from the GPIO Chip */
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gpiod_remove_lookup_table(&panel_gpio_table);
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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 <bin.yang@intel.com>");
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MODULE_AUTHOR("Zhu, Lejun <lejun.zhu@linux.intel.com>");
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