From df60325839efcc0fa37f5ec64c0e29f5d84e56c8 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 4 Apr 2023 11:43:11 +0200 Subject: [PATCH] pinctrl: sx150x: Convert to immutable irq_chip Convert the driver to immutable irq-chip with a bit of intuition. I switched to consistently using irqd_to_hwirq() consistently while we are at it. As the driver now needs to get the gpio_chip in the .irq_mask and .irq_unmask callbacks, I switched to a pattern where we first fetch the gpio_chip and then the state container from that in two steps. The compiler will do the same thing anyway. Cc: Marc Zyngier Signed-off-by: Linus Walleij Link: https://lore.kernel.org/r/20230403-immutable-irqchips-v1-9-503788a7f6e6@linaro.org --- drivers/pinctrl/pinctrl-sx150x.c | 64 ++++++++++++++++++-------------- 1 file changed, 37 insertions(+), 27 deletions(-) diff --git a/drivers/pinctrl/pinctrl-sx150x.c b/drivers/pinctrl/pinctrl-sx150x.c index 87fcbfbf49b7..7632ffc3946f 100644 --- a/drivers/pinctrl/pinctrl-sx150x.c +++ b/drivers/pinctrl/pinctrl-sx150x.c @@ -99,7 +99,6 @@ struct sx150x_pinctrl { struct pinctrl_dev *pctldev; struct pinctrl_desc pinctrl_desc; struct gpio_chip gpio; - struct irq_chip irq_chip; struct regmap *regmap; struct { u32 sense; @@ -487,19 +486,21 @@ static int sx150x_gpio_direction_output(struct gpio_chip *chip, static void sx150x_irq_mask(struct irq_data *d) { - struct sx150x_pinctrl *pctl = - gpiochip_get_data(irq_data_get_irq_chip_data(d)); - unsigned int n = d->hwirq; + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct sx150x_pinctrl *pctl = gpiochip_get_data(gc); + unsigned int n = irqd_to_hwirq(d); pctl->irq.masked |= BIT(n); + gpiochip_disable_irq(gc, n); } static void sx150x_irq_unmask(struct irq_data *d) { - struct sx150x_pinctrl *pctl = - gpiochip_get_data(irq_data_get_irq_chip_data(d)); - unsigned int n = d->hwirq; + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct sx150x_pinctrl *pctl = gpiochip_get_data(gc); + unsigned int n = irqd_to_hwirq(d); + gpiochip_enable_irq(gc, n); pctl->irq.masked &= ~BIT(n); } @@ -520,14 +521,14 @@ static void sx150x_irq_set_sense(struct sx150x_pinctrl *pctl, static int sx150x_irq_set_type(struct irq_data *d, unsigned int flow_type) { - struct sx150x_pinctrl *pctl = - gpiochip_get_data(irq_data_get_irq_chip_data(d)); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct sx150x_pinctrl *pctl = gpiochip_get_data(gc); unsigned int n, val = 0; if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) return -EINVAL; - n = d->hwirq; + n = irqd_to_hwirq(d); if (flow_type & IRQ_TYPE_EDGE_RISING) val |= SX150X_IRQ_TYPE_EDGE_RISING; @@ -562,22 +563,42 @@ static irqreturn_t sx150x_irq_thread_fn(int irq, void *dev_id) static void sx150x_irq_bus_lock(struct irq_data *d) { - struct sx150x_pinctrl *pctl = - gpiochip_get_data(irq_data_get_irq_chip_data(d)); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct sx150x_pinctrl *pctl = gpiochip_get_data(gc); mutex_lock(&pctl->lock); } static void sx150x_irq_bus_sync_unlock(struct irq_data *d) { - struct sx150x_pinctrl *pctl = - gpiochip_get_data(irq_data_get_irq_chip_data(d)); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct sx150x_pinctrl *pctl = gpiochip_get_data(gc); regmap_write(pctl->regmap, pctl->data->reg_irq_mask, pctl->irq.masked); regmap_write(pctl->regmap, pctl->data->reg_sense, pctl->irq.sense); mutex_unlock(&pctl->lock); } + +static void sx150x_irq_print_chip(struct irq_data *d, struct seq_file *p) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct sx150x_pinctrl *pctl = gpiochip_get_data(gc); + + seq_printf(p, pctl->client->name); +} + +static const struct irq_chip sx150x_irq_chip = { + .irq_mask = sx150x_irq_mask, + .irq_unmask = sx150x_irq_unmask, + .irq_set_type = sx150x_irq_set_type, + .irq_bus_lock = sx150x_irq_bus_lock, + .irq_bus_sync_unlock = sx150x_irq_bus_sync_unlock, + .irq_print_chip = sx150x_irq_print_chip, + .flags = IRQCHIP_IMMUTABLE, + GPIOCHIP_IRQ_RESOURCE_HELPERS, +}; + static int sx150x_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *config) { @@ -1181,19 +1202,8 @@ static int sx150x_probe(struct i2c_client *client) if (client->irq > 0) { struct gpio_irq_chip *girq; - pctl->irq_chip.irq_mask = sx150x_irq_mask; - pctl->irq_chip.irq_unmask = sx150x_irq_unmask; - pctl->irq_chip.irq_set_type = sx150x_irq_set_type; - pctl->irq_chip.irq_bus_lock = sx150x_irq_bus_lock; - pctl->irq_chip.irq_bus_sync_unlock = sx150x_irq_bus_sync_unlock; - pctl->irq_chip.name = devm_kstrdup(dev, client->name, - GFP_KERNEL); - if (!pctl->irq_chip.name) - return -ENOMEM; - pctl->irq.masked = ~0; pctl->irq.sense = 0; - /* * Because sx150x_irq_threaded_fn invokes all of the * nested interrupt handlers via handle_nested_irq, @@ -1206,7 +1216,7 @@ static int sx150x_probe(struct i2c_client *client) * called (should not happen) */ girq = &pctl->gpio.irq; - girq->chip = &pctl->irq_chip; + gpio_irq_chip_set_chip(girq, &sx150x_irq_chip); /* This will let us handle the parent IRQ in the driver */ girq->parent_handler = NULL; girq->num_parents = 0; @@ -1219,7 +1229,7 @@ static int sx150x_probe(struct i2c_client *client) sx150x_irq_thread_fn, IRQF_ONESHOT | IRQF_SHARED | IRQF_TRIGGER_FALLING, - pctl->irq_chip.name, pctl); + client->name, pctl); if (ret < 0) return ret; } -- 2.20.1