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alistair23-linux/drivers/mfd/mt6397-core.c
Thomas Gleixner 1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation this program is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:41 -07:00

363 lines
8.5 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2014 MediaTek Inc.
* Author: Flora Fu, MediaTek
*/
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/regmap.h>
#include <linux/mfd/core.h>
#include <linux/mfd/mt6397/core.h>
#include <linux/mfd/mt6323/core.h>
#include <linux/mfd/mt6397/registers.h>
#include <linux/mfd/mt6323/registers.h>
#define MT6397_RTC_BASE 0xe000
#define MT6397_RTC_SIZE 0x3e
#define MT6323_CID_CODE 0x23
#define MT6391_CID_CODE 0x91
#define MT6397_CID_CODE 0x97
static const struct resource mt6397_rtc_resources[] = {
{
.start = MT6397_RTC_BASE,
.end = MT6397_RTC_BASE + MT6397_RTC_SIZE,
.flags = IORESOURCE_MEM,
},
{
.start = MT6397_IRQ_RTC,
.end = MT6397_IRQ_RTC,
.flags = IORESOURCE_IRQ,
},
};
static const struct resource mt6323_keys_resources[] = {
DEFINE_RES_IRQ(MT6323_IRQ_STATUS_PWRKEY),
DEFINE_RES_IRQ(MT6323_IRQ_STATUS_FCHRKEY),
};
static const struct resource mt6397_keys_resources[] = {
DEFINE_RES_IRQ(MT6397_IRQ_PWRKEY),
DEFINE_RES_IRQ(MT6397_IRQ_HOMEKEY),
};
static const struct mfd_cell mt6323_devs[] = {
{
.name = "mt6323-regulator",
.of_compatible = "mediatek,mt6323-regulator"
}, {
.name = "mt6323-led",
.of_compatible = "mediatek,mt6323-led"
}, {
.name = "mtk-pmic-keys",
.num_resources = ARRAY_SIZE(mt6323_keys_resources),
.resources = mt6323_keys_resources,
.of_compatible = "mediatek,mt6323-keys"
},
};
static const struct mfd_cell mt6397_devs[] = {
{
.name = "mt6397-rtc",
.num_resources = ARRAY_SIZE(mt6397_rtc_resources),
.resources = mt6397_rtc_resources,
.of_compatible = "mediatek,mt6397-rtc",
}, {
.name = "mt6397-regulator",
.of_compatible = "mediatek,mt6397-regulator",
}, {
.name = "mt6397-codec",
.of_compatible = "mediatek,mt6397-codec",
}, {
.name = "mt6397-clk",
.of_compatible = "mediatek,mt6397-clk",
}, {
.name = "mt6397-pinctrl",
.of_compatible = "mediatek,mt6397-pinctrl",
}, {
.name = "mtk-pmic-keys",
.num_resources = ARRAY_SIZE(mt6397_keys_resources),
.resources = mt6397_keys_resources,
.of_compatible = "mediatek,mt6397-keys"
}
};
static void mt6397_irq_lock(struct irq_data *data)
{
struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);
mutex_lock(&mt6397->irqlock);
}
static void mt6397_irq_sync_unlock(struct irq_data *data)
{
struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);
regmap_write(mt6397->regmap, mt6397->int_con[0],
mt6397->irq_masks_cur[0]);
regmap_write(mt6397->regmap, mt6397->int_con[1],
mt6397->irq_masks_cur[1]);
mutex_unlock(&mt6397->irqlock);
}
static void mt6397_irq_disable(struct irq_data *data)
{
struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);
int shift = data->hwirq & 0xf;
int reg = data->hwirq >> 4;
mt6397->irq_masks_cur[reg] &= ~BIT(shift);
}
static void mt6397_irq_enable(struct irq_data *data)
{
struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(data);
int shift = data->hwirq & 0xf;
int reg = data->hwirq >> 4;
mt6397->irq_masks_cur[reg] |= BIT(shift);
}
#ifdef CONFIG_PM_SLEEP
static int mt6397_irq_set_wake(struct irq_data *irq_data, unsigned int on)
{
struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(irq_data);
int shift = irq_data->hwirq & 0xf;
int reg = irq_data->hwirq >> 4;
if (on)
mt6397->wake_mask[reg] |= BIT(shift);
else
mt6397->wake_mask[reg] &= ~BIT(shift);
return 0;
}
#else
#define mt6397_irq_set_wake NULL
#endif
static struct irq_chip mt6397_irq_chip = {
.name = "mt6397-irq",
.irq_bus_lock = mt6397_irq_lock,
.irq_bus_sync_unlock = mt6397_irq_sync_unlock,
.irq_enable = mt6397_irq_enable,
.irq_disable = mt6397_irq_disable,
.irq_set_wake = mt6397_irq_set_wake,
};
static void mt6397_irq_handle_reg(struct mt6397_chip *mt6397, int reg,
int irqbase)
{
unsigned int status;
int i, irq, ret;
ret = regmap_read(mt6397->regmap, reg, &status);
if (ret) {
dev_err(mt6397->dev, "Failed to read irq status: %d\n", ret);
return;
}
for (i = 0; i < 16; i++) {
if (status & BIT(i)) {
irq = irq_find_mapping(mt6397->irq_domain, irqbase + i);
if (irq)
handle_nested_irq(irq);
}
}
regmap_write(mt6397->regmap, reg, status);
}
static irqreturn_t mt6397_irq_thread(int irq, void *data)
{
struct mt6397_chip *mt6397 = data;
mt6397_irq_handle_reg(mt6397, mt6397->int_status[0], 0);
mt6397_irq_handle_reg(mt6397, mt6397->int_status[1], 16);
return IRQ_HANDLED;
}
static int mt6397_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
struct mt6397_chip *mt6397 = d->host_data;
irq_set_chip_data(irq, mt6397);
irq_set_chip_and_handler(irq, &mt6397_irq_chip, handle_level_irq);
irq_set_nested_thread(irq, 1);
irq_set_noprobe(irq);
return 0;
}
static const struct irq_domain_ops mt6397_irq_domain_ops = {
.map = mt6397_irq_domain_map,
};
static int mt6397_irq_init(struct mt6397_chip *mt6397)
{
int ret;
mutex_init(&mt6397->irqlock);
/* Mask all interrupt sources */
regmap_write(mt6397->regmap, mt6397->int_con[0], 0x0);
regmap_write(mt6397->regmap, mt6397->int_con[1], 0x0);
mt6397->irq_domain = irq_domain_add_linear(mt6397->dev->of_node,
MT6397_IRQ_NR, &mt6397_irq_domain_ops, mt6397);
if (!mt6397->irq_domain) {
dev_err(mt6397->dev, "could not create irq domain\n");
return -ENOMEM;
}
ret = devm_request_threaded_irq(mt6397->dev, mt6397->irq, NULL,
mt6397_irq_thread, IRQF_ONESHOT, "mt6397-pmic", mt6397);
if (ret) {
dev_err(mt6397->dev, "failed to register irq=%d; err: %d\n",
mt6397->irq, ret);
return ret;
}
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int mt6397_irq_suspend(struct device *dev)
{
struct mt6397_chip *chip = dev_get_drvdata(dev);
regmap_write(chip->regmap, chip->int_con[0], chip->wake_mask[0]);
regmap_write(chip->regmap, chip->int_con[1], chip->wake_mask[1]);
enable_irq_wake(chip->irq);
return 0;
}
static int mt6397_irq_resume(struct device *dev)
{
struct mt6397_chip *chip = dev_get_drvdata(dev);
regmap_write(chip->regmap, chip->int_con[0], chip->irq_masks_cur[0]);
regmap_write(chip->regmap, chip->int_con[1], chip->irq_masks_cur[1]);
disable_irq_wake(chip->irq);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(mt6397_pm_ops, mt6397_irq_suspend,
mt6397_irq_resume);
static int mt6397_probe(struct platform_device *pdev)
{
int ret;
unsigned int id;
struct mt6397_chip *pmic;
pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
if (!pmic)
return -ENOMEM;
pmic->dev = &pdev->dev;
/*
* mt6397 MFD is child device of soc pmic wrapper.
* Regmap is set from its parent.
*/
pmic->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!pmic->regmap)
return -ENODEV;
platform_set_drvdata(pdev, pmic);
ret = regmap_read(pmic->regmap, MT6397_CID, &id);
if (ret) {
dev_err(pmic->dev, "Failed to read chip id: %d\n", ret);
return ret;
}
pmic->irq = platform_get_irq(pdev, 0);
if (pmic->irq <= 0)
return pmic->irq;
switch (id & 0xff) {
case MT6323_CID_CODE:
pmic->int_con[0] = MT6323_INT_CON0;
pmic->int_con[1] = MT6323_INT_CON1;
pmic->int_status[0] = MT6323_INT_STATUS0;
pmic->int_status[1] = MT6323_INT_STATUS1;
ret = mt6397_irq_init(pmic);
if (ret)
return ret;
ret = devm_mfd_add_devices(&pdev->dev, -1, mt6323_devs,
ARRAY_SIZE(mt6323_devs), NULL,
0, pmic->irq_domain);
break;
case MT6397_CID_CODE:
case MT6391_CID_CODE:
pmic->int_con[0] = MT6397_INT_CON0;
pmic->int_con[1] = MT6397_INT_CON1;
pmic->int_status[0] = MT6397_INT_STATUS0;
pmic->int_status[1] = MT6397_INT_STATUS1;
ret = mt6397_irq_init(pmic);
if (ret)
return ret;
ret = devm_mfd_add_devices(&pdev->dev, -1, mt6397_devs,
ARRAY_SIZE(mt6397_devs), NULL,
0, pmic->irq_domain);
break;
default:
dev_err(&pdev->dev, "unsupported chip: %d\n", id);
return -ENODEV;
}
if (ret) {
irq_domain_remove(pmic->irq_domain);
dev_err(&pdev->dev, "failed to add child devices: %d\n", ret);
}
return ret;
}
static const struct of_device_id mt6397_of_match[] = {
{ .compatible = "mediatek,mt6397" },
{ .compatible = "mediatek,mt6323" },
{ }
};
MODULE_DEVICE_TABLE(of, mt6397_of_match);
static const struct platform_device_id mt6397_id[] = {
{ "mt6397", 0 },
{ },
};
MODULE_DEVICE_TABLE(platform, mt6397_id);
static struct platform_driver mt6397_driver = {
.probe = mt6397_probe,
.driver = {
.name = "mt6397",
.of_match_table = of_match_ptr(mt6397_of_match),
.pm = &mt6397_pm_ops,
},
.id_table = mt6397_id,
};
module_platform_driver(mt6397_driver);
MODULE_AUTHOR("Flora Fu, MediaTek");
MODULE_DESCRIPTION("Driver for MediaTek MT6397 PMIC");
MODULE_LICENSE("GPL");
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