[PATCH v2 03/16] gpio: aspeed: Convert to immutable irq_chip

Linus Walleij
2023-03-07T13:05:44Z

Tested-by: Joel Stanley <joel@jms.id.au>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/gpio/gpio-aspeed.c | 44 ++++++++++++++++++++++++++++++++++++++------
1 file changed, 38 insertions(+), 6 deletions(-)

diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c
index a94da80d3a95..9c4852de2733 100644
--- a/drivers/gpio/gpio-aspeed.c
+++ b/drivers/gpio/gpio-aspeed.c
@@ -15,6 +15,7 @@
#include <linux/module.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
+#include <linux/seq_file.h>
#include <linux/spinlock.h>
#include <linux/string.h>

@@ -53,7 +54,7 @@ struct aspeed_gpio_config {
*/
struct aspeed_gpio {
struct gpio_chip chip;
- struct irq_chip irqc;
+ struct device *dev;
raw_spinlock_t lock;
void __iomem *base;
int irq;
@@ -566,6 +567,10 @@ static void aspeed_gpio_irq_set_mask(struct irq_data *d, bool set)

addr = bank_reg(gpio, bank, reg_irq_enable);

+ /* Unmasking the IRQ */
+ if (set)
+ gpiochip_enable_irq(&gpio->chip, irqd_to_hwirq(d));
+
raw_spin_lock_irqsave(&gpio->lock, flags);
copro = aspeed_gpio_copro_request(gpio, offset);

@@ -579,6 +584,10 @@ static void aspeed_gpio_irq_set_mask(struct irq_data *d, bool set)
if (copro)
aspeed_gpio_copro_release(gpio, offset);
raw_spin_unlock_irqrestore(&gpio->lock, flags);
+
+ /* Masking the IRQ */
+ if (!set)
+ gpiochip_disable_irq(&gpio->chip, irqd_to_hwirq(d));
}

static void aspeed_gpio_irq_mask(struct irq_data *d)
@@ -1080,6 +1089,30 @@ int aspeed_gpio_copro_release_gpio(struct gpio_desc *desc)
}
EXPORT_SYMBOL_GPL(aspeed_gpio_copro_release_gpio);

+static void aspeed_gpio_irq_print_chip(struct irq_data *d, struct seq_file *p)
+{
+ const struct aspeed_gpio_bank *bank;
+ struct aspeed_gpio *gpio;
+ u32 bit;
+ int rc, offset;
+
+ rc = irqd_to_aspeed_gpio_data(d, &gpio, &bank, &bit, &offset);
+ if (rc)
+ return;
+
+ seq_printf(p, dev_name(gpio->dev));
+}
+
+static const struct irq_chip aspeed_gpio_irq_chip = {
+ .irq_ack = aspeed_gpio_irq_ack,
+ .irq_mask = aspeed_gpio_irq_mask,
+ .irq_unmask = aspeed_gpio_irq_unmask,
+ .irq_set_type = aspeed_gpio_set_type,
+ .irq_print_chip = aspeed_gpio_irq_print_chip,
+ .flags = IRQCHIP_IMMUTABLE,
+ GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
/*
* Any banks not specified in a struct aspeed_bank_props array are assumed to
* have the properties:
@@ -1149,6 +1182,8 @@ static int __init aspeed_gpio_probe(struct platform_device *pdev)
if (IS_ERR(gpio->base))
return PTR_ERR(gpio->base);

+ gpio->dev = &pdev->dev;
+
raw_spin_lock_init(&gpio->lock);

gpio_id = of_match_node(aspeed_gpio_of_table, pdev->dev.of_node);
@@ -1208,12 +1243,9 @@ static int __init aspeed_gpio_probe(struct platform_device *pdev)

gpio->irq = rc;
girq = &gpio->chip.irq;
- girq->chip = &gpio->irqc;
+ gpio_irq_chip_set_chip(girq, &aspeed_gpio_irq_chip);
girq->chip->name = dev_name(&pdev->dev);
- girq->chip->irq_ack = aspeed_gpio_irq_ack;
- girq->chip->irq_mask = aspeed_gpio_irq_mask;
- girq->chip->irq_unmask = aspeed_gpio_irq_unmask;
- girq->chip->irq_set_type = aspeed_gpio_set_type;
+
girq->parent_handler = aspeed_gpio_irq_handler;
girq->num_parents = 1;
girq->parents = devm_kcalloc(&pdev->dev, 1,

--
2.34.1