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path: root/drivers/gpio/gpio-lynxpoint.c
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Diffstat (limited to 'drivers/gpio/gpio-lynxpoint.c')
-rw-r--r--drivers/gpio/gpio-lynxpoint.c116
1 files changed, 44 insertions, 72 deletions
diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c
index 2bea89b7250..fa945ec9ccf 100644
--- a/drivers/gpio/gpio-lynxpoint.c
+++ b/drivers/gpio/gpio-lynxpoint.c
@@ -25,9 +25,7 @@
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/interrupt.h>
-#include <linux/irq.h>
#include <linux/gpio.h>
-#include <linux/irqdomain.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/platform_device.h>
@@ -62,7 +60,6 @@
struct lp_gpio {
struct gpio_chip chip;
- struct irq_domain *domain;
struct platform_device *pdev;
spinlock_t lock;
unsigned long reg_base;
@@ -151,7 +148,8 @@ static void lp_gpio_free(struct gpio_chip *chip, unsigned offset)
static int lp_irq_type(struct irq_data *d, unsigned type)
{
- struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip);
u32 hwirq = irqd_to_hwirq(d);
unsigned long flags;
u32 value;
@@ -236,16 +234,11 @@ static int lp_gpio_direction_output(struct gpio_chip *chip,
return 0;
}
-static int lp_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
- struct lp_gpio *lg = container_of(chip, struct lp_gpio, chip);
- return irq_create_mapping(lg->domain, offset);
-}
-
static void lp_gpio_irq_handler(unsigned hwirq, struct irq_desc *desc)
{
struct irq_data *data = irq_desc_get_irq_data(desc);
- struct lp_gpio *lg = irq_data_get_irq_handler_data(data);
+ struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+ struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip);
struct irq_chip *chip = irq_data_get_irq_chip(data);
u32 base, pin, mask;
unsigned long reg, ena, pending;
@@ -262,7 +255,7 @@ static void lp_gpio_irq_handler(unsigned hwirq, struct irq_desc *desc)
mask = BIT(pin);
/* Clear before handling so we don't lose an edge */
outl(mask, reg);
- irq = irq_find_mapping(lg->domain, base + pin);
+ irq = irq_find_mapping(lg->chip.irqdomain, base + pin);
generic_handle_irq(irq);
}
}
@@ -279,7 +272,8 @@ static void lp_irq_mask(struct irq_data *d)
static void lp_irq_enable(struct irq_data *d)
{
- struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip);
u32 hwirq = irqd_to_hwirq(d);
unsigned long reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE);
unsigned long flags;
@@ -291,7 +285,8 @@ static void lp_irq_enable(struct irq_data *d)
static void lp_irq_disable(struct irq_data *d)
{
- struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip);
u32 hwirq = irqd_to_hwirq(d);
unsigned long reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE);
unsigned long flags;
@@ -301,26 +296,6 @@ static void lp_irq_disable(struct irq_data *d)
spin_unlock_irqrestore(&lg->lock, flags);
}
-static int lp_irq_reqres(struct irq_data *d)
-{
- struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
-
- if (gpio_lock_as_irq(&lg->chip, irqd_to_hwirq(d))) {
- dev_err(lg->chip.dev,
- "unable to lock HW IRQ %lu for IRQ\n",
- irqd_to_hwirq(d));
- return -EINVAL;
- }
- return 0;
-}
-
-static void lp_irq_relres(struct irq_data *d)
-{
- struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
-
- gpio_unlock_as_irq(&lg->chip, irqd_to_hwirq(d));
-}
-
static struct irq_chip lp_irqchip = {
.name = "LP-GPIO",
.irq_mask = lp_irq_mask,
@@ -328,8 +303,6 @@ static struct irq_chip lp_irqchip = {
.irq_enable = lp_irq_enable,
.irq_disable = lp_irq_disable,
.irq_set_type = lp_irq_type,
- .irq_request_resources = lp_irq_reqres,
- .irq_release_resources = lp_irq_relres,
.flags = IRQCHIP_SKIP_SET_WAKE,
};
@@ -348,22 +321,6 @@ static void lp_gpio_irq_init_hw(struct lp_gpio *lg)
}
}
-static int lp_gpio_irq_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hwirq)
-{
- struct lp_gpio *lg = d->host_data;
-
- irq_set_chip_and_handler(irq, &lp_irqchip, handle_simple_irq);
- irq_set_chip_data(irq, lg);
- irq_set_irq_type(irq, IRQ_TYPE_NONE);
-
- return 0;
-}
-
-static const struct irq_domain_ops lp_gpio_irq_ops = {
- .map = lp_gpio_irq_map,
-};
-
static int lp_gpio_probe(struct platform_device *pdev)
{
struct lp_gpio *lg;
@@ -371,7 +328,6 @@ static int lp_gpio_probe(struct platform_device *pdev)
struct resource *io_rc, *irq_rc;
struct device *dev = &pdev->dev;
unsigned long reg_len;
- unsigned hwirq;
int ret = -ENODEV;
lg = devm_kzalloc(dev, sizeof(struct lp_gpio), GFP_KERNEL);
@@ -414,27 +370,28 @@ static int lp_gpio_probe(struct platform_device *pdev)
gc->can_sleep = false;
gc->dev = dev;
+ ret = gpiochip_add(gc);
+ if (ret) {
+ dev_err(dev, "failed adding lp-gpio chip\n");
+ return ret;
+ }
+
/* set up interrupts */
if (irq_rc && irq_rc->start) {
- hwirq = irq_rc->start;
- gc->to_irq = lp_gpio_to_irq;
-
- lg->domain = irq_domain_add_linear(NULL, LP_NUM_GPIO,
- &lp_gpio_irq_ops, lg);
- if (!lg->domain)
- return -ENXIO;
-
lp_gpio_irq_init_hw(lg);
+ ret = gpiochip_irqchip_add(gc, &lp_irqchip, 0,
+ handle_simple_irq, IRQ_TYPE_NONE);
+ if (ret) {
+ dev_err(dev, "failed to add irqchip\n");
+ gpiochip_remove(gc);
+ return ret;
+ }
- irq_set_handler_data(hwirq, lg);
- irq_set_chained_handler(hwirq, lp_gpio_irq_handler);
+ gpiochip_set_chained_irqchip(gc, &lp_irqchip,
+ (unsigned)irq_rc->start,
+ lp_gpio_irq_handler);
}
- ret = gpiochip_add(gc);
- if (ret) {
- dev_err(dev, "failed adding lp-gpio chip\n");
- return ret;
- }
pm_runtime_enable(dev);
return 0;
@@ -450,9 +407,27 @@ static int lp_gpio_runtime_resume(struct device *dev)
return 0;
}
+static int lp_gpio_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct lp_gpio *lg = platform_get_drvdata(pdev);
+ unsigned long reg;
+ int i;
+
+ /* on some hardware suspend clears input sensing, re-enable it here */
+ for (i = 0; i < lg->chip.ngpio; i++) {
+ if (gpiochip_is_requested(&lg->chip, i) != NULL) {
+ reg = lp_gpio_reg(&lg->chip, i, LP_CONFIG2);
+ outl(inl(reg) & ~GPINDIS_BIT, reg);
+ }
+ }
+ return 0;
+}
+
static const struct dev_pm_ops lp_gpio_pm_ops = {
.runtime_suspend = lp_gpio_runtime_suspend,
.runtime_resume = lp_gpio_runtime_resume,
+ .resume = lp_gpio_resume,
};
static const struct acpi_device_id lynxpoint_gpio_acpi_match[] = {
@@ -465,11 +440,8 @@ MODULE_DEVICE_TABLE(acpi, lynxpoint_gpio_acpi_match);
static int lp_gpio_remove(struct platform_device *pdev)
{
struct lp_gpio *lg = platform_get_drvdata(pdev);
- int err;
pm_runtime_disable(&pdev->dev);
- err = gpiochip_remove(&lg->chip);
- if (err)
- dev_warn(&pdev->dev, "failed to remove gpio_chip.\n");
+ gpiochip_remove(&lg->chip);
return 0;
}