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path: root/drivers/gpio/gpio-stmpe.c
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Diffstat (limited to 'drivers/gpio/gpio-stmpe.c')
-rw-r--r--drivers/gpio/gpio-stmpe.c94
1 files changed, 58 insertions, 36 deletions
diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
index dce34727bbf8..770476a9da87 100644
--- a/drivers/gpio/gpio-stmpe.c
+++ b/drivers/gpio/gpio-stmpe.c
@@ -11,7 +11,9 @@
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/irq.h>
+#include <linux/irqdomain.h>
#include <linux/interrupt.h>
+#include <linux/of.h>
#include <linux/mfd/stmpe.h>
/*
@@ -28,6 +30,7 @@ struct stmpe_gpio {
struct stmpe *stmpe;
struct device *dev;
struct mutex irq_lock;
+ struct irq_domain *domain;
int irq_base;
unsigned norequest_mask;
@@ -103,7 +106,7 @@ static int stmpe_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(chip);
- return stmpe_gpio->irq_base + offset;
+ return irq_create_mapping(stmpe_gpio->domain, offset);
}
static int stmpe_gpio_request(struct gpio_chip *chip, unsigned offset)
@@ -132,7 +135,7 @@ static struct gpio_chip template_chip = {
static int stmpe_gpio_irq_set_type(struct irq_data *d, unsigned int type)
{
struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
- int offset = d->irq - stmpe_gpio->irq_base;
+ int offset = d->hwirq;
int regoffset = offset / 8;
int mask = 1 << (offset % 8);
@@ -199,7 +202,7 @@ static void stmpe_gpio_irq_sync_unlock(struct irq_data *d)
static void stmpe_gpio_irq_mask(struct irq_data *d)
{
struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
- int offset = d->irq - stmpe_gpio->irq_base;
+ int offset = d->hwirq;
int regoffset = offset / 8;
int mask = 1 << (offset % 8);
@@ -209,7 +212,7 @@ static void stmpe_gpio_irq_mask(struct irq_data *d)
static void stmpe_gpio_irq_unmask(struct irq_data *d)
{
struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
- int offset = d->irq - stmpe_gpio->irq_base;
+ int offset = d->hwirq;
int regoffset = offset / 8;
int mask = 1 << (offset % 8);
@@ -251,8 +254,9 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev)
while (stat) {
int bit = __ffs(stat);
int line = bank * 8 + bit;
+ int virq = irq_find_mapping(stmpe_gpio->domain, line);
- handle_nested_irq(stmpe_gpio->irq_base + line);
+ handle_nested_irq(virq);
stat &= ~(1 << bit);
}
@@ -267,43 +271,61 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev)
return IRQ_HANDLED;
}
-static int __devinit stmpe_gpio_irq_init(struct stmpe_gpio *stmpe_gpio)
+int stmpe_gpio_irq_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hwirq)
{
- int base = stmpe_gpio->irq_base;
- int irq;
+ struct stmpe_gpio *stmpe_gpio = d->host_data;
+
+ if (!stmpe_gpio)
+ return -EINVAL;
- for (irq = base; irq < base + stmpe_gpio->chip.ngpio; irq++) {
- irq_set_chip_data(irq, stmpe_gpio);
- irq_set_chip_and_handler(irq, &stmpe_gpio_irq_chip,
- handle_simple_irq);
- irq_set_nested_thread(irq, 1);
+ irq_set_chip_data(hwirq, stmpe_gpio);
+ irq_set_chip_and_handler(hwirq, &stmpe_gpio_irq_chip,
+ handle_simple_irq);
+ irq_set_nested_thread(hwirq, 1);
#ifdef CONFIG_ARM
- set_irq_flags(irq, IRQF_VALID);
+ set_irq_flags(hwirq, IRQF_VALID);
#else
- irq_set_noprobe(irq);
+ irq_set_noprobe(hwirq);
#endif
- }
return 0;
}
-static void stmpe_gpio_irq_remove(struct stmpe_gpio *stmpe_gpio)
+void stmpe_gpio_irq_unmap(struct irq_domain *d, unsigned int virq)
{
- int base = stmpe_gpio->irq_base;
- int irq;
-
- for (irq = base; irq < base + stmpe_gpio->chip.ngpio; irq++) {
#ifdef CONFIG_ARM
- set_irq_flags(irq, 0);
+ set_irq_flags(virq, 0);
#endif
- irq_set_chip_and_handler(irq, NULL, NULL);
- irq_set_chip_data(irq, NULL);
+ irq_set_chip_and_handler(virq, NULL, NULL);
+ irq_set_chip_data(virq, NULL);
+}
+
+static const struct irq_domain_ops stmpe_gpio_irq_simple_ops = {
+ .unmap = stmpe_gpio_irq_unmap,
+ .map = stmpe_gpio_irq_map,
+ .xlate = irq_domain_xlate_twocell,
+};
+
+static int stmpe_gpio_irq_init(struct stmpe_gpio *stmpe_gpio)
+{
+ int base = stmpe_gpio->irq_base;
+
+ stmpe_gpio->domain = irq_domain_add_simple(NULL,
+ stmpe_gpio->chip.ngpio, base,
+ &stmpe_gpio_irq_simple_ops, stmpe_gpio);
+ if (!stmpe_gpio->domain) {
+ dev_err(stmpe_gpio->dev, "failed to create irqdomain\n");
+ return -ENOSYS;
}
+
+ return 0;
}
-static int __devinit stmpe_gpio_probe(struct platform_device *pdev)
+static int stmpe_gpio_probe(struct platform_device *pdev)
{
struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
+ struct device_node *np = pdev->dev.of_node;
struct stmpe_gpio_platform_data *pdata;
struct stmpe_gpio *stmpe_gpio;
int ret;
@@ -321,13 +343,17 @@ static int __devinit stmpe_gpio_probe(struct platform_device *pdev)
stmpe_gpio->dev = &pdev->dev;
stmpe_gpio->stmpe = stmpe;
- stmpe_gpio->norequest_mask = pdata ? pdata->norequest_mask : 0;
-
stmpe_gpio->chip = template_chip;
stmpe_gpio->chip.ngpio = stmpe->num_gpios;
stmpe_gpio->chip.dev = &pdev->dev;
stmpe_gpio->chip.base = pdata ? pdata->gpio_base : -1;
+ if (pdata)
+ stmpe_gpio->norequest_mask = pdata->norequest_mask;
+ else if (np)
+ of_property_read_u32(np, "st,norequest-mask",
+ &stmpe_gpio->norequest_mask);
+
if (irq >= 0)
stmpe_gpio->irq_base = stmpe->irq_base + STMPE_INT_GPIO(0);
else
@@ -348,7 +374,7 @@ static int __devinit stmpe_gpio_probe(struct platform_device *pdev)
IRQF_ONESHOT, "stmpe-gpio", stmpe_gpio);
if (ret) {
dev_err(&pdev->dev, "unable to get irq: %d\n", ret);
- goto out_removeirq;
+ goto out_disable;
}
}
@@ -368,9 +394,6 @@ static int __devinit stmpe_gpio_probe(struct platform_device *pdev)
out_freeirq:
if (irq >= 0)
free_irq(irq, stmpe_gpio);
-out_removeirq:
- if (irq >= 0)
- stmpe_gpio_irq_remove(stmpe_gpio);
out_disable:
stmpe_disable(stmpe, STMPE_BLOCK_GPIO);
out_free:
@@ -378,7 +401,7 @@ out_free:
return ret;
}
-static int __devexit stmpe_gpio_remove(struct platform_device *pdev)
+static int stmpe_gpio_remove(struct platform_device *pdev)
{
struct stmpe_gpio *stmpe_gpio = platform_get_drvdata(pdev);
struct stmpe *stmpe = stmpe_gpio->stmpe;
@@ -398,10 +421,9 @@ static int __devexit stmpe_gpio_remove(struct platform_device *pdev)
stmpe_disable(stmpe, STMPE_BLOCK_GPIO);
- if (irq >= 0) {
+ if (irq >= 0)
free_irq(irq, stmpe_gpio);
- stmpe_gpio_irq_remove(stmpe_gpio);
- }
+
platform_set_drvdata(pdev, NULL);
kfree(stmpe_gpio);
@@ -412,7 +434,7 @@ static struct platform_driver stmpe_gpio_driver = {
.driver.name = "stmpe-gpio",
.driver.owner = THIS_MODULE,
.probe = stmpe_gpio_probe,
- .remove = __devexit_p(stmpe_gpio_remove),
+ .remove = stmpe_gpio_remove,
};
static int __init stmpe_gpio_init(void)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.