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linux/drivers/irqchip/irq-madera.c
Uwe Kleine-König 8d0f3e7bde irqchip/madera: Convert to platform_driver::remove_new() callback 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/64c2f79760c53f29651e7126418c407ff699317d.1703284359.git.u.kleine-koenig@pengutronix.de
2024-02-27 18:12:10 +01:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Interrupt support for Cirrus Logic Madera codecs
*
* Copyright (C) 2015-2018 Cirrus Logic, Inc. and
* Cirrus Logic International Semiconductor Ltd.
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/irqchip/irq-madera.h>
#include <linux/mfd/madera/core.h>
#include <linux/mfd/madera/pdata.h>
#include <linux/mfd/madera/registers.h>
#define MADERA_IRQ(_irq, _reg) \
[MADERA_IRQ_ ## _irq] = { \
.reg_offset = (_reg) - MADERA_IRQ1_STATUS_2, \
.mask = MADERA_ ## _irq ## _EINT1 \
}
/* Mappings are the same for all Madera codecs */
static const struct regmap_irq madera_irqs[MADERA_NUM_IRQ] = {
MADERA_IRQ(FLL1_LOCK, MADERA_IRQ1_STATUS_2),
MADERA_IRQ(FLL2_LOCK, MADERA_IRQ1_STATUS_2),
MADERA_IRQ(FLL3_LOCK, MADERA_IRQ1_STATUS_2),
MADERA_IRQ(FLLAO_LOCK, MADERA_IRQ1_STATUS_2),
MADERA_IRQ(MICDET1, MADERA_IRQ1_STATUS_6),
MADERA_IRQ(MICDET2, MADERA_IRQ1_STATUS_6),
MADERA_IRQ(HPDET, MADERA_IRQ1_STATUS_6),
MADERA_IRQ(MICD_CLAMP_RISE, MADERA_IRQ1_STATUS_7),
MADERA_IRQ(MICD_CLAMP_FALL, MADERA_IRQ1_STATUS_7),
MADERA_IRQ(JD1_RISE, MADERA_IRQ1_STATUS_7),
MADERA_IRQ(JD1_FALL, MADERA_IRQ1_STATUS_7),
MADERA_IRQ(ASRC2_IN1_LOCK, MADERA_IRQ1_STATUS_9),
MADERA_IRQ(ASRC2_IN2_LOCK, MADERA_IRQ1_STATUS_9),
MADERA_IRQ(ASRC1_IN1_LOCK, MADERA_IRQ1_STATUS_9),
MADERA_IRQ(ASRC1_IN2_LOCK, MADERA_IRQ1_STATUS_9),
MADERA_IRQ(DRC2_SIG_DET, MADERA_IRQ1_STATUS_9),
MADERA_IRQ(DRC1_SIG_DET, MADERA_IRQ1_STATUS_9),
MADERA_IRQ(DSP_IRQ1, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ2, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ3, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ4, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ5, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ6, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ7, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ8, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ9, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ10, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ11, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ12, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ13, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ14, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ15, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(DSP_IRQ16, MADERA_IRQ1_STATUS_11),
MADERA_IRQ(HP3R_SC, MADERA_IRQ1_STATUS_12),
MADERA_IRQ(HP3L_SC, MADERA_IRQ1_STATUS_12),
MADERA_IRQ(HP2R_SC, MADERA_IRQ1_STATUS_12),
MADERA_IRQ(HP2L_SC, MADERA_IRQ1_STATUS_12),
MADERA_IRQ(HP1R_SC, MADERA_IRQ1_STATUS_12),
MADERA_IRQ(HP1L_SC, MADERA_IRQ1_STATUS_12),
MADERA_IRQ(SPK_OVERHEAT_WARN, MADERA_IRQ1_STATUS_15),
MADERA_IRQ(SPK_OVERHEAT, MADERA_IRQ1_STATUS_15),
MADERA_IRQ(DSP1_BUS_ERR, MADERA_IRQ1_STATUS_33),
MADERA_IRQ(DSP2_BUS_ERR, MADERA_IRQ1_STATUS_33),
MADERA_IRQ(DSP3_BUS_ERR, MADERA_IRQ1_STATUS_33),
MADERA_IRQ(DSP4_BUS_ERR, MADERA_IRQ1_STATUS_33),
MADERA_IRQ(DSP5_BUS_ERR, MADERA_IRQ1_STATUS_33),
MADERA_IRQ(DSP6_BUS_ERR, MADERA_IRQ1_STATUS_33),
MADERA_IRQ(DSP7_BUS_ERR, MADERA_IRQ1_STATUS_33),
};
static const struct regmap_irq_chip madera_irq_chip = {
.name = "madera IRQ",
.status_base = MADERA_IRQ1_STATUS_2,
.mask_base = MADERA_IRQ1_MASK_2,
.ack_base = MADERA_IRQ1_STATUS_2,
.runtime_pm = true,
.num_regs = 32,
.irqs = madera_irqs,
.num_irqs = ARRAY_SIZE(madera_irqs),
};
#ifdef CONFIG_PM_SLEEP
static int madera_suspend(struct device *dev)
{
struct madera *madera = dev_get_drvdata(dev->parent);
dev_dbg(madera->irq_dev, "Suspend, disabling IRQ\n");
/*
* A runtime resume would be needed to access the chip interrupt
* controller but runtime pm doesn't function during suspend.
* Temporarily disable interrupts until we reach suspend_noirq state.
*/
disable_irq(madera->irq);
return 0;
}
static int madera_suspend_noirq(struct device *dev)
{
struct madera *madera = dev_get_drvdata(dev->parent);
dev_dbg(madera->irq_dev, "No IRQ suspend, reenabling IRQ\n");
/* Re-enable interrupts to service wakeup interrupts from the chip */
enable_irq(madera->irq);
return 0;
}
static int madera_resume_noirq(struct device *dev)
{
struct madera *madera = dev_get_drvdata(dev->parent);
dev_dbg(madera->irq_dev, "No IRQ resume, disabling IRQ\n");
/*
* We can't handle interrupts until runtime pm is available again.
* Disable them temporarily.
*/
disable_irq(madera->irq);
return 0;
}
static int madera_resume(struct device *dev)
{
struct madera *madera = dev_get_drvdata(dev->parent);
dev_dbg(madera->irq_dev, "Resume, reenabling IRQ\n");
/* Interrupts can now be handled */
enable_irq(madera->irq);
return 0;
}
#endif
static const struct dev_pm_ops madera_irq_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(madera_suspend, madera_resume)
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(madera_suspend_noirq,
madera_resume_noirq)
};
static int madera_irq_probe(struct platform_device *pdev)
{
struct madera *madera = dev_get_drvdata(pdev->dev.parent);
struct irq_data *irq_data;
unsigned int irq_flags = 0;
int ret;
dev_dbg(&pdev->dev, "probe\n");
/*
* Read the flags from the interrupt controller if not specified
* by pdata
*/
irq_flags = madera->pdata.irq_flags;
if (!irq_flags) {
irq_data = irq_get_irq_data(madera->irq);
if (!irq_data) {
dev_err(&pdev->dev, "Invalid IRQ: %d\n", madera->irq);
return -EINVAL;
}
irq_flags = irqd_get_trigger_type(irq_data);
/* Codec defaults to trigger low, use this if no flags given */
if (irq_flags == IRQ_TYPE_NONE)
irq_flags = IRQF_TRIGGER_LOW;
}
if (irq_flags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
dev_err(&pdev->dev, "Host interrupt not level-triggered\n");
return -EINVAL;
}
/*
* The silicon always starts at active-low, check if we need to
* switch to active-high.
*/
if (irq_flags & IRQF_TRIGGER_HIGH) {
ret = regmap_update_bits(madera->regmap, MADERA_IRQ1_CTRL,
MADERA_IRQ_POL_MASK, 0);
if (ret) {
dev_err(&pdev->dev,
"Failed to set IRQ polarity: %d\n", ret);
return ret;
}
}
/*
* NOTE: regmap registers this against the OF node of the parent of
* the regmap - that is, against the mfd driver
*/
ret = regmap_add_irq_chip(madera->regmap, madera->irq, IRQF_ONESHOT, 0,
&madera_irq_chip, &madera->irq_data);
if (ret) {
dev_err(&pdev->dev, "add_irq_chip failed: %d\n", ret);
return ret;
}
/* Save dev in parent MFD struct so it is accessible to siblings */
madera->irq_dev = &pdev->dev;
return 0;
}
static void madera_irq_remove(struct platform_device *pdev)
{
struct madera *madera = dev_get_drvdata(pdev->dev.parent);
/*
* The IRQ is disabled by the parent MFD driver before
* it starts cleaning up all child drivers
*/
madera->irq_dev = NULL;
regmap_del_irq_chip(madera->irq, madera->irq_data);
}
static struct platform_driver madera_irq_driver = {
.probe = madera_irq_probe,
.remove_new = madera_irq_remove,
.driver = {
.name = "madera-irq",
.pm = &madera_irq_pm_ops,
}
};
module_platform_driver(madera_irq_driver);
MODULE_SOFTDEP("pre: madera");
MODULE_DESCRIPTION("Madera IRQ driver");
MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
MODULE_LICENSE("GPL v2");
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