[PATCH v2 08/16] gpio: hlwd: Convert to immutable irq_chip

Linus Walleij
2023-03-07T13:06:09Z

drivers/gpio/gpio-hlwd.c | 33 +++++++++++++++++++++++++--------
1 file changed, 25 insertions(+), 8 deletions(-)

diff --git a/drivers/gpio/gpio-hlwd.c b/drivers/gpio/gpio-hlwd.c
index 4e13e937f832..c208ac1c54a6 100644
--- a/drivers/gpio/gpio-hlwd.c
+++ b/drivers/gpio/gpio-hlwd.c
@@ -11,6 +11,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
+#include <linux/seq_file.h>
#include <linux/slab.h>

/*
@@ -48,7 +49,7 @@

struct hlwd_gpio {
struct gpio_chip gpioc;
- struct irq_chip irqc;
+ struct device *dev;
void __iomem *regs;
int irq;
u32 edge_emulation;
@@ -123,6 +124,7 @@ static void hlwd_gpio_irq_mask(struct irq_data *data)
mask &= ~BIT(data->hwirq);
iowrite32be(mask, hlwd->regs + HW_GPIOB_INTMASK);
raw_spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags);
+ gpiochip_disable_irq(&hlwd->gpioc, irqd_to_hwirq(data));
}

static void hlwd_gpio_irq_unmask(struct irq_data *data)
@@ -132,6 +134,7 @@ static void hlwd_gpio_irq_unmask(struct irq_data *data)
unsigned long flags;
u32 mask;

+ gpiochip_enable_irq(&hlwd->gpioc, irqd_to_hwirq(data));
raw_spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags);
mask = ioread32be(hlwd->regs + HW_GPIOB_INTMASK);
mask |= BIT(data->hwirq);
@@ -202,6 +205,24 @@ static int hlwd_gpio_irq_set_type(struct irq_data *data, unsigned int flow_type)
return 0;
}

+static void hlwd_gpio_irq_print_chip(struct irq_data *data, struct seq_file *p)
+{
+ struct hlwd_gpio *hlwd =
+ gpiochip_get_data(irq_data_get_irq_chip_data(data));
+
+ seq_printf(p, dev_name(hlwd->dev));
+}
+
+static const struct irq_chip hlwd_gpio_irq_chip = {
+ .irq_mask = hlwd_gpio_irq_mask,
+ .irq_unmask = hlwd_gpio_irq_unmask,
+ .irq_enable = hlwd_gpio_irq_enable,
+ .irq_set_type = hlwd_gpio_irq_set_type,
+ .irq_print_chip = hlwd_gpio_irq_print_chip,
+ .flags = IRQCHIP_IMMUTABLE,
+ GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
static int hlwd_gpio_probe(struct platform_device *pdev)
{
struct hlwd_gpio *hlwd;
@@ -216,6 +237,8 @@ static int hlwd_gpio_probe(struct platform_device *pdev)
if (IS_ERR(hlwd->regs))
return PTR_ERR(hlwd->regs);

+ hlwd->dev = &pdev->dev;
+
/*
* Claim all GPIOs using the OWNER register. This will not work on
* systems where the AHBPROT memory firewall hasn't been configured to
@@ -259,14 +282,8 @@ static int hlwd_gpio_probe(struct platform_device *pdev)
return hlwd->irq;
}

- hlwd->irqc.name = dev_name(&pdev->dev);
- hlwd->irqc.irq_mask = hlwd_gpio_irq_mask;
- hlwd->irqc.irq_unmask = hlwd_gpio_irq_unmask;
- hlwd->irqc.irq_enable = hlwd_gpio_irq_enable;
- hlwd->irqc.irq_set_type = hlwd_gpio_irq_set_type;
-
girq = &hlwd->gpioc.irq;
- girq->chip = &hlwd->irqc;
+ gpio_irq_chip_set_chip(girq, &hlwd_gpio_irq_chip);
girq->parent_handler = hlwd_gpio_irqhandler;
girq->num_parents = 1;
girq->parents = devm_kcalloc(&pdev->dev, 1,

--
2.34.1