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gpio: mlxbf2: Convert to immutable irq_chip 

Convert the driver to immutable irq-chip with a bit of
intuition.

Cc: Marc Zyngier <maz@kernel.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Linus Walleij 2023-03-09 08:46:00 +01:00 committed by Bartosz Golaszewski
parent db45f0e105
commit 5bfff76d27
1 changed files with 25 additions and 7 deletions
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32
drivers/gpio/gpio-mlxbf2.c
View File

@ -17,6 +17,7 @@
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/resource.h>
#include <linux/seq_file.h>
#include <linux/spinlock.h>
#include <linux/types.h>
@ -65,10 +66,10 @@ struct mlxbf2_gpio_context_save_regs {
/* BlueField-2 gpio block context structure. */
struct mlxbf2_gpio_context {
struct gpio_chip gc;
struct irq_chip irq_chip;
/* YU GPIO blocks address */
void __iomem *gpio_io;
struct device *dev;
struct mlxbf2_gpio_context_save_regs *csave_regs;
};
@ -237,6 +238,7 @@ static void mlxbf2_gpio_irq_enable(struct irq_data *irqd)
unsigned long flags;
u32 val;
gpiochip_enable_irq(gc, irqd_to_hwirq(irqd));
raw_spin_lock_irqsave(&gs->gc.bgpio_lock, flags);
val = readl(gs->gpio_io + YU_GPIO_CAUSE_OR_CLRCAUSE);
val |= BIT(offset);
@ -261,6 +263,7 @@ static void mlxbf2_gpio_irq_disable(struct irq_data *irqd)
val &= ~BIT(offset);
writel(val, gs->gpio_io + YU_GPIO_CAUSE_OR_EVTEN0);
raw_spin_unlock_irqrestore(&gs->gc.bgpio_lock, flags);
gpiochip_disable_irq(gc, irqd_to_hwirq(irqd));
}
static irqreturn_t mlxbf2_gpio_irq_handler(int irq, void *ptr)
@ -322,6 +325,24 @@ mlxbf2_gpio_irq_set_type(struct irq_data *irqd, unsigned int type)
return 0;
}
static void mlxbf2_gpio_irq_print_chip(struct irq_data *irqd,
struct seq_file *p)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(irqd);
struct mlxbf2_gpio_context *gs = gpiochip_get_data(gc);
seq_printf(p, dev_name(gs->dev));
}
static const struct irq_chip mlxbf2_gpio_irq_chip = {
.irq_set_type = mlxbf2_gpio_irq_set_type,
.irq_enable = mlxbf2_gpio_irq_enable,
.irq_disable = mlxbf2_gpio_irq_disable,
.irq_print_chip = mlxbf2_gpio_irq_print_chip,
.flags = IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
/* BlueField-2 GPIO driver initialization routine. */
static int
mlxbf2_gpio_probe(struct platform_device *pdev)
@ -340,6 +361,8 @@ mlxbf2_gpio_probe(struct platform_device *pdev)
if (!gs)
return -ENOMEM;
gs->dev = dev;
/* YU GPIO block address */
gs->gpio_io = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(gs->gpio_io))
@ -376,13 +399,8 @@ mlxbf2_gpio_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq >= 0) {
gs->irq_chip.name = name;
gs->irq_chip.irq_set_type = mlxbf2_gpio_irq_set_type;
gs->irq_chip.irq_enable = mlxbf2_gpio_irq_enable;
gs->irq_chip.irq_disable = mlxbf2_gpio_irq_disable;
girq = &gs->gc.irq;
girq->chip = &gs->irq_chip;
gpio_irq_chip_set_chip(girq, &mlxbf2_gpio_irq_chip);
girq->handler = handle_simple_irq;
girq->default_type = IRQ_TYPE_NONE;
/* This will let us handle the parent IRQ in the driver */