提交 21f7541d 编写于 作者: R Rhyland Klein 提交者: Samuel Ortiz

mfd: Add tps65910-irq devicetree init and irqdomain support

This change changes the tps65910-irq code to use irqdomain, and support
initialization from devicetree. This assumes that the irq_base in the
platform data is -1 if devicetree is used.
Signed-off-by: NRhyland Klein <rklein@nvidia.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
上级 b09530ef
......@@ -190,6 +190,7 @@ config MFD_TPS65910
depends on I2C=y && GPIOLIB
select MFD_CORE
select REGMAP_I2C
select IRQ_DOMAIN
help
if you say yes here you get support for the TPS65910 series of
Power Management chips.
......
......@@ -20,15 +20,10 @@
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/gpio.h>
#include <linux/mfd/tps65910.h>
static inline int irq_to_tps65910_irq(struct tps65910 *tps65910,
int irq)
{
return (irq - tps65910->irq_base);
}
/*
* This is a threaded IRQ handler so can access I2C/SPI. Since all
* interrupts are clear on read the IRQ line will be reasserted and
......@@ -76,7 +71,7 @@ static irqreturn_t tps65910_irq(int irq, void *irq_data)
if (!(irq_sts & (1 << i)))
continue;
handle_nested_irq(tps65910->irq_base + i);
handle_nested_irq(irq_find_mapping(tps65910->domain, i));
}
/* Write the STS register back to clear IRQs we handled */
......@@ -135,14 +130,14 @@ static void tps65910_irq_enable(struct irq_data *data)
{
struct tps65910 *tps65910 = irq_data_get_irq_chip_data(data);
tps65910->irq_mask &= ~( 1 << irq_to_tps65910_irq(tps65910, data->irq));
tps65910->irq_mask &= ~(1 << data->hwirq);
}
static void tps65910_irq_disable(struct irq_data *data)
{
struct tps65910 *tps65910 = irq_data_get_irq_chip_data(data);
tps65910->irq_mask |= ( 1 << irq_to_tps65910_irq(tps65910, data->irq));
tps65910->irq_mask |= (1 << data->hwirq);
}
#ifdef CONFIG_PM_SLEEP
......@@ -164,10 +159,35 @@ static struct irq_chip tps65910_irq_chip = {
.irq_set_wake = tps65910_irq_set_wake,
};
static int tps65910_irq_map(struct irq_domain *h, unsigned int virq,
irq_hw_number_t hw)
{
struct tps65910 *tps65910 = h->host_data;
irq_set_chip_data(virq, tps65910);
irq_set_chip_and_handler(virq, &tps65910_irq_chip, handle_edge_irq);
irq_set_nested_thread(virq, 1);
/* ARM needs us to explicitly flag the IRQ as valid
* and will set them noprobe when we do so. */
#ifdef CONFIG_ARM
set_irq_flags(virq, IRQF_VALID);
#else
irq_set_noprobe(virq);
#endif
return 0;
}
static struct irq_domain_ops tps65910_domain_ops = {
.map = tps65910_irq_map,
.xlate = irq_domain_xlate_twocell,
};
int tps65910_irq_init(struct tps65910 *tps65910, int irq,
struct tps65910_platform_data *pdata)
{
int ret, cur_irq;
int ret;
int flags = IRQF_ONESHOT;
if (!irq) {
......@@ -175,17 +195,11 @@ int tps65910_irq_init(struct tps65910 *tps65910, int irq,
return -EINVAL;
}
if (!pdata || !pdata->irq_base) {
dev_warn(tps65910->dev, "No interrupt support, no IRQ base\n");
if (!pdata) {
dev_warn(tps65910->dev, "No interrupt support, no pdata\n");
return -EINVAL;
}
tps65910->irq_mask = 0xFFFFFF;
mutex_init(&tps65910->irq_lock);
tps65910->chip_irq = irq;
tps65910->irq_base = pdata->irq_base;
switch (tps65910_chip_id(tps65910)) {
case TPS65910:
tps65910->irq_num = TPS65910_NUM_IRQ;
......@@ -195,22 +209,36 @@ int tps65910_irq_init(struct tps65910 *tps65910, int irq,
break;
}
/* Register with genirq */
for (cur_irq = tps65910->irq_base;
cur_irq < tps65910->irq_num + tps65910->irq_base;
cur_irq++) {
irq_set_chip_data(cur_irq, tps65910);
irq_set_chip_and_handler(cur_irq, &tps65910_irq_chip,
handle_edge_irq);
irq_set_nested_thread(cur_irq, 1);
/* ARM needs us to explicitly flag the IRQ as valid
* and will set them noprobe when we do so. */
#ifdef CONFIG_ARM
set_irq_flags(cur_irq, IRQF_VALID);
#else
irq_set_noprobe(cur_irq);
#endif
if (pdata->irq_base > 0) {
pdata->irq_base = irq_alloc_descs(pdata->irq_base, 0,
tps65910->irq_num, -1);
if (pdata->irq_base < 0) {
dev_warn(tps65910->dev, "Failed to alloc IRQs: %d\n",
pdata->irq_base);
return pdata->irq_base;
}
}
tps65910->irq_mask = 0xFFFFFF;
mutex_init(&tps65910->irq_lock);
tps65910->chip_irq = irq;
tps65910->irq_base = pdata->irq_base;
if (pdata->irq_base > 0)
tps65910->domain = irq_domain_add_legacy(tps65910->dev->of_node,
tps65910->irq_num,
pdata->irq_base,
0,
&tps65910_domain_ops, tps65910);
else
tps65910->domain = irq_domain_add_linear(tps65910->dev->of_node,
tps65910->irq_num,
&tps65910_domain_ops, tps65910);
if (!tps65910->domain) {
dev_err(tps65910->dev, "Failed to create IRQ domain\n");
return -ENOMEM;
}
ret = request_threaded_irq(irq, NULL, tps65910_irq, flags,
......
......@@ -836,6 +836,7 @@ struct tps65910 {
int irq_base;
int irq_num;
u32 irq_mask;
struct irq_domain *domain;
};
struct tps65910_platform_data {
......
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