[PATCH v2 04/16] gpio: aspeed-sgpio: Convert to immutable irq_chip

Linus Walleij
2023-03-07T13:05:46Z

drivers/gpio/gpio-aspeed-sgpio.c | 44 ++++++++++++++++++++++++++++++++--------
1 file changed, 36 insertions(+), 8 deletions(-)

diff --git a/drivers/gpio/gpio-aspeed-sgpio.c b/drivers/gpio/gpio-aspeed-sgpio.c
index 454cefbeecf0..3c1c0fc21fc5 100644
--- a/drivers/gpio/gpio-aspeed-sgpio.c
+++ b/drivers/gpio/gpio-aspeed-sgpio.c
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/seq_file.h>
#include <linux/spinlock.h>
#include <linux/string.h>

@@ -29,7 +30,7 @@ struct aspeed_sgpio_pdata {

struct aspeed_sgpio {
struct gpio_chip chip;
- struct irq_chip intc;
+ struct device *dev;
struct clk *pclk;
raw_spinlock_t lock;
void __iomem *base;
@@ -296,6 +297,10 @@ static void aspeed_sgpio_irq_set_mask(struct irq_data *d, bool set)
irqd_to_aspeed_sgpio_data(d, &gpio, &bank, &bit, &offset);
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);

reg = ioread32(addr);
@@ -307,6 +312,12 @@ static void aspeed_sgpio_irq_set_mask(struct irq_data *d, bool set)
iowrite32(reg, addr);

raw_spin_unlock_irqrestore(&gpio->lock, flags);
+
+ /* Masking the IRQ */
+ if (!set)
+ gpiochip_disable_irq(&gpio->chip, irqd_to_hwirq(d));
+
+
}

static void aspeed_sgpio_irq_mask(struct irq_data *d)
@@ -401,6 +412,27 @@ static void aspeed_sgpio_irq_handler(struct irq_desc *desc)
chained_irq_exit(ic, desc);
}

+static void aspeed_sgpio_irq_print_chip(struct irq_data *d, struct seq_file *p)
+{
+ const struct aspeed_sgpio_bank *bank;
+ struct aspeed_sgpio *gpio;
+ u32 bit;
+ int offset;
+
+ irqd_to_aspeed_sgpio_data(d, &gpio, &bank, &bit, &offset);
+ seq_printf(p, dev_name(gpio->dev));
+}
+
+static const struct irq_chip aspeed_sgpio_irq_chip = {
+ .irq_ack = aspeed_sgpio_irq_ack,
+ .irq_mask = aspeed_sgpio_irq_mask,
+ .irq_unmask = aspeed_sgpio_irq_unmask,
+ .irq_set_type = aspeed_sgpio_set_type,
+ .irq_print_chip = aspeed_sgpio_irq_print_chip,
+ .flags = IRQCHIP_IMMUTABLE,
+ GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
static int aspeed_sgpio_setup_irqs(struct aspeed_sgpio *gpio,
struct platform_device *pdev)
{
@@ -423,14 +455,8 @@ static int aspeed_sgpio_setup_irqs(struct aspeed_sgpio *gpio,
iowrite32(0xffffffff, bank_reg(gpio, bank, reg_irq_status));
}

- gpio->intc.name = dev_name(&pdev->dev);
- gpio->intc.irq_ack = aspeed_sgpio_irq_ack;
- gpio->intc.irq_mask = aspeed_sgpio_irq_mask;
- gpio->intc.irq_unmask = aspeed_sgpio_irq_unmask;
- gpio->intc.irq_set_type = aspeed_sgpio_set_type;
-
irq = &gpio->chip.irq;
- irq->chip = &gpio->intc;
+ gpio_irq_chip_set_chip(irq, &aspeed_sgpio_irq_chip);
irq->init_valid_mask = aspeed_sgpio_irq_init_valid_mask;
irq->handler = handle_bad_irq;
irq->default_type = IRQ_TYPE_NONE;
@@ -524,6 +550,8 @@ static int __init aspeed_sgpio_probe(struct platform_device *pdev)
if (IS_ERR(gpio->base))
return PTR_ERR(gpio->base);

+ gpio->dev = &pdev->dev;
+
pdata = device_get_match_data(&pdev->dev);
if (!pdata)
return -EINVAL;

--
2.34.1