f3151ab4a7
Implement .irq_set_wake() to get who is wakeup source and setup on suspend/reumse. Enable mt6393_irq as wake up source properly to pinctrl by enable_irq_wake()/enable_irq_wake(). Signed-off-by: Henry Chen <henryc.chen@mediatek.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
294 lines
6.9 KiB
C
294 lines
6.9 KiB
C
/*
|
|
* Copyright (c) 2014 MediaTek Inc.
|
|
* Author: Flora Fu, MediaTek
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#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/mt6397/registers.h>
|
|
|
|
#define MT6397_RTC_BASE 0xe000
|
|
#define MT6397_RTC_SIZE 0x3e
|
|
|
|
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 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",
|
|
},
|
|
};
|
|
|
|
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_CON0, mt6397->irq_masks_cur[0]);
|
|
regmap_write(mt6397->regmap, MT6397_INT_CON1, 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_STATUS0, 0);
|
|
mt6397_irq_handle_reg(mt6397, MT6397_INT_STATUS1, 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_CON0, 0x0);
|
|
regmap_write(mt6397->regmap, MT6397_INT_CON1, 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, MT6397_INT_CON0, chip->wake_mask[0]);
|
|
regmap_write(chip->regmap, MT6397_INT_CON1, 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, MT6397_INT_CON0, chip->irq_masks_cur[0]);
|
|
regmap_write(chip->regmap, MT6397_INT_CON1, 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;
|
|
struct mt6397_chip *mt6397;
|
|
|
|
mt6397 = devm_kzalloc(&pdev->dev, sizeof(*mt6397), GFP_KERNEL);
|
|
if (!mt6397)
|
|
return -ENOMEM;
|
|
|
|
mt6397->dev = &pdev->dev;
|
|
/*
|
|
* mt6397 MFD is child device of soc pmic wrapper.
|
|
* Regmap is set from its parent.
|
|
*/
|
|
mt6397->regmap = dev_get_regmap(pdev->dev.parent, NULL);
|
|
if (!mt6397->regmap)
|
|
return -ENODEV;
|
|
|
|
platform_set_drvdata(pdev, mt6397);
|
|
|
|
mt6397->irq = platform_get_irq(pdev, 0);
|
|
if (mt6397->irq > 0) {
|
|
ret = mt6397_irq_init(mt6397);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = mfd_add_devices(&pdev->dev, -1, mt6397_devs,
|
|
ARRAY_SIZE(mt6397_devs), NULL, 0, NULL);
|
|
if (ret)
|
|
dev_err(&pdev->dev, "failed to add child devices: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mt6397_remove(struct platform_device *pdev)
|
|
{
|
|
mfd_remove_devices(&pdev->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id mt6397_of_match[] = {
|
|
{ .compatible = "mediatek,mt6397" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, mt6397_of_match);
|
|
|
|
static struct platform_driver mt6397_driver = {
|
|
.probe = mt6397_probe,
|
|
.remove = mt6397_remove,
|
|
.driver = {
|
|
.name = "mt6397",
|
|
.of_match_table = of_match_ptr(mt6397_of_match),
|
|
.pm = &mt6397_pm_ops,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(mt6397_driver);
|
|
|
|
MODULE_AUTHOR("Flora Fu, MediaTek");
|
|
MODULE_DESCRIPTION("Driver for MediaTek MT6397 PMIC");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:mt6397");
|