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pinctrl: pistachio: Convert to immutable irq_chip 

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

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230414-immutable-irqchips-2-v1-2-6b59a5186b00@linaro.org
This commit is contained in:
Linus Walleij 2023-04-14 16:06:18 +02:00
parent a0a53f1bf1
commit 33c56e5ca0
1 changed files with 25 additions and 10 deletions
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35
drivers/pinctrl/pinctrl-pistachio.c
View File

@ -17,6 +17,7 @@
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
@ -93,10 +94,10 @@ struct pistachio_pin_group {
struct pistachio_gpio_bank {
struct pistachio_pinctrl *pctl;
void __iomem *base;
int instance;
unsigned int pin_base;
unsigned int npins;
struct gpio_chip gpio_chip;
struct irq_chip irq_chip;
};
struct pistachio_pinctrl {
@ -1228,12 +1229,14 @@ static void pistachio_gpio_irq_mask(struct irq_data *data)
struct pistachio_gpio_bank *bank = irqd_to_bank(data);
gpio_mask_writel(bank, GPIO_INTERRUPT_EN, data->hwirq, 0);
gpiochip_disable_irq(&bank->gpio_chip, irqd_to_hwirq(data));
}
static void pistachio_gpio_irq_unmask(struct irq_data *data)
{
struct pistachio_gpio_bank *bank = irqd_to_bank(data);
gpiochip_enable_irq(&bank->gpio_chip, irqd_to_hwirq(data));
gpio_mask_writel(bank, GPIO_INTERRUPT_EN, data->hwirq, 1);
}
@ -1312,6 +1315,7 @@ static void pistachio_gpio_irq_handler(struct irq_desc *desc)
#define GPIO_BANK(_bank, _pin_base, _npins) \
{ \
.instance = (_bank), \
.pin_base = _pin_base, \
.npins = _npins, \
.gpio_chip = { \
@ -1326,14 +1330,6 @@ static void pistachio_gpio_irq_handler(struct irq_desc *desc)
.base = _pin_base, \
.ngpio = _npins, \
}, \
.irq_chip = { \
.name = "GPIO" #_bank, \
.irq_startup = pistachio_gpio_irq_startup, \
.irq_ack = pistachio_gpio_irq_ack, \
.irq_mask = pistachio_gpio_irq_mask, \
.irq_unmask = pistachio_gpio_irq_unmask, \
.irq_set_type = pistachio_gpio_irq_set_type, \
}, \
}
static struct pistachio_gpio_bank pistachio_gpio_banks[] = {
@ -1345,6 +1341,25 @@ static struct pistachio_gpio_bank pistachio_gpio_banks[] = {
GPIO_BANK(5, PISTACHIO_PIN_MFIO(80), 10),
};
static void pistachio_gpio_irq_print_chip(struct irq_data *data,
struct seq_file *p)
{
struct pistachio_gpio_bank *bank = irqd_to_bank(data);
seq_printf(p, "GPIO%d", bank->instance);
}
static const struct irq_chip pistachio_gpio_irq_chip = {
.irq_startup = pistachio_gpio_irq_startup,
.irq_ack = pistachio_gpio_irq_ack,
.irq_mask = pistachio_gpio_irq_mask,
.irq_unmask = pistachio_gpio_irq_unmask,
.irq_set_type = pistachio_gpio_irq_set_type,
.irq_print_chip = pistachio_gpio_irq_print_chip,
.flags = IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static int pistachio_gpio_register(struct pistachio_pinctrl *pctl)
{
struct pistachio_gpio_bank *bank;
@ -1394,7 +1409,7 @@ static int pistachio_gpio_register(struct pistachio_pinctrl *pctl)
bank->gpio_chip.fwnode = child;
girq = &bank->gpio_chip.irq;
girq->chip = &bank->irq_chip;
gpio_irq_chip_set_chip(girq, &pistachio_gpio_irq_chip);
girq->parent_handler = pistachio_gpio_irq_handler;
girq->num_parents = 1;
girq->parents = devm_kcalloc(pctl->dev, 1,