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gpio: mcp23s08: switch to use gpiolib irqchip helpers
This switches the mcp23s08 driver to use the gpiolib irqchip helpers. Signed-off-by: Phil Reid <preid@electromag.com.au> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Phil Reid
Linus Walleij
parent
d46ab68239
commit
dad3d27295
@ -1091,6 +1091,7 @@ menu "SPI or I2C GPIO expanders"
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config GPIO_MCP23S08
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tristate "Microchip MCP23xxx I/O expander"
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select GPIOLIB_IRQCHIP
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help
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SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
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I/O expanders.
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@ -77,7 +77,6 @@ struct mcp23s08 {
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/* lock protects the cached values */
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struct mutex lock;
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struct mutex irq_lock;
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struct irq_domain *irq_domain;
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struct gpio_chip chip;
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@ -96,11 +95,6 @@ struct mcp23s08_driver_data {
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struct mcp23s08 chip[];
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};
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/* This lock class tells lockdep that GPIO irqs are in a different
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* category than their parents, so it won't report false recursion.
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*/
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static struct lock_class_key gpio_lock_class;
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/*----------------------------------------------------------------------*/
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#if IS_ENABLED(CONFIG_I2C)
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@ -369,7 +363,7 @@ static irqreturn_t mcp23s08_irq(int irq, void *data)
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if ((BIT(i) & mcp->cache[MCP_INTF]) &&
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((BIT(i) & intcap & mcp->irq_rise) ||
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(mcp->irq_fall & ~intcap & BIT(i)))) {
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child_irq = irq_find_mapping(mcp->irq_domain, i);
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child_irq = irq_find_mapping(mcp->chip.irqdomain, i);
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handle_nested_irq(child_irq);
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}
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}
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@ -377,16 +371,10 @@ static irqreturn_t mcp23s08_irq(int irq, void *data)
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return IRQ_HANDLED;
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}
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static int mcp23s08_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
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{
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struct mcp23s08 *mcp = gpiochip_get_data(chip);
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return irq_find_mapping(mcp->irq_domain, offset);
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}
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static void mcp23s08_irq_mask(struct irq_data *data)
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{
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struct mcp23s08 *mcp = irq_data_get_irq_chip_data(data);
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struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
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struct mcp23s08 *mcp = gpiochip_get_data(gc);
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unsigned int pos = data->hwirq;
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mcp->cache[MCP_GPINTEN] &= ~BIT(pos);
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@ -394,7 +382,8 @@ static void mcp23s08_irq_mask(struct irq_data *data)
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static void mcp23s08_irq_unmask(struct irq_data *data)
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{
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struct mcp23s08 *mcp = irq_data_get_irq_chip_data(data);
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struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
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struct mcp23s08 *mcp = gpiochip_get_data(gc);
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unsigned int pos = data->hwirq;
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mcp->cache[MCP_GPINTEN] |= BIT(pos);
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@ -402,7 +391,8 @@ static void mcp23s08_irq_unmask(struct irq_data *data)
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static int mcp23s08_irq_set_type(struct irq_data *data, unsigned int type)
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{
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struct mcp23s08 *mcp = irq_data_get_irq_chip_data(data);
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struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
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struct mcp23s08 *mcp = gpiochip_get_data(gc);
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unsigned int pos = data->hwirq;
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int status = 0;
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@ -426,14 +416,16 @@ static int mcp23s08_irq_set_type(struct irq_data *data, unsigned int type)
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static void mcp23s08_irq_bus_lock(struct irq_data *data)
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{
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struct mcp23s08 *mcp = irq_data_get_irq_chip_data(data);
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struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
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struct mcp23s08 *mcp = gpiochip_get_data(gc);
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mutex_lock(&mcp->irq_lock);
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}
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static void mcp23s08_irq_bus_unlock(struct irq_data *data)
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{
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struct mcp23s08 *mcp = irq_data_get_irq_chip_data(data);
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struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
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struct mcp23s08 *mcp = gpiochip_get_data(gc);
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mutex_lock(&mcp->lock);
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mcp->ops->write(mcp, MCP_GPINTEN, mcp->cache[MCP_GPINTEN]);
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@ -445,7 +437,8 @@ static void mcp23s08_irq_bus_unlock(struct irq_data *data)
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static int mcp23s08_irq_reqres(struct irq_data *data)
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{
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struct mcp23s08 *mcp = irq_data_get_irq_chip_data(data);
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struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
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struct mcp23s08 *mcp = gpiochip_get_data(gc);
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if (gpiochip_lock_as_irq(&mcp->chip, data->hwirq)) {
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dev_err(mcp->chip.parent,
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@ -459,7 +452,8 @@ static int mcp23s08_irq_reqres(struct irq_data *data)
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static void mcp23s08_irq_relres(struct irq_data *data)
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{
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struct mcp23s08 *mcp = irq_data_get_irq_chip_data(data);
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struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
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struct mcp23s08 *mcp = gpiochip_get_data(gc);
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gpiochip_unlock_as_irq(&mcp->chip, data->hwirq);
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}
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@ -478,17 +472,11 @@ static struct irq_chip mcp23s08_irq_chip = {
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static int mcp23s08_irq_setup(struct mcp23s08 *mcp)
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{
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struct gpio_chip *chip = &mcp->chip;
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int err, irq, j;
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int err;
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unsigned long irqflags = IRQF_ONESHOT | IRQF_SHARED;
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mutex_init(&mcp->irq_lock);
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mcp->irq_domain = irq_domain_add_linear(chip->parent->of_node,
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chip->ngpio,
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&irq_domain_simple_ops, mcp);
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if (!mcp->irq_domain)
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return -ENODEV;
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if (mcp->irq_active_high)
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irqflags |= IRQF_TRIGGER_HIGH;
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else
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@ -503,32 +491,25 @@ static int mcp23s08_irq_setup(struct mcp23s08 *mcp)
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return err;
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}
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chip->to_irq = mcp23s08_gpio_to_irq;
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for (j = 0; j < mcp->chip.ngpio; j++) {
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irq = irq_create_mapping(mcp->irq_domain, j);
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irq_set_lockdep_class(irq, &gpio_lock_class);
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irq_set_chip_data(irq, mcp);
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irq_set_chip(irq, &mcp23s08_irq_chip);
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irq_set_nested_thread(irq, true);
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irq_set_noprobe(irq);
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err = gpiochip_irqchip_add(chip,
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&mcp23s08_irq_chip,
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0,
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handle_simple_irq,
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IRQ_TYPE_NONE);
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if (err) {
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dev_err(chip->parent,
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"could not connect irqchip to gpiochip: %d\n", err);
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return err;
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}
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gpiochip_set_chained_irqchip(chip,
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&mcp23s08_irq_chip,
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mcp->irq,
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NULL);
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return 0;
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}
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static void mcp23s08_irq_teardown(struct mcp23s08 *mcp)
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{
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unsigned int irq, i;
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for (i = 0; i < mcp->chip.ngpio; i++) {
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irq = irq_find_mapping(mcp->irq_domain, i);
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if (irq > 0)
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irq_dispose_mapping(irq);
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}
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irq_domain_remove(mcp->irq_domain);
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}
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/*----------------------------------------------------------------------*/
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#ifdef CONFIG_DEBUG_FS
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@ -721,7 +702,6 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
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if (mcp->irq && mcp->irq_controller) {
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status = mcp23s08_irq_setup(mcp);
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if (status) {
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mcp23s08_irq_teardown(mcp);
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goto fail;
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}
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}
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@ -847,9 +827,6 @@ static int mcp230xx_remove(struct i2c_client *client)
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{
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struct mcp23s08 *mcp = i2c_get_clientdata(client);
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if (client->irq && mcp->irq_controller)
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mcp23s08_irq_teardown(mcp);
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gpiochip_remove(&mcp->chip);
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kfree(mcp);
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@ -1017,8 +994,6 @@ static int mcp23s08_remove(struct spi_device *spi)
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if (!data->mcp[addr])
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continue;
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if (spi->irq && data->mcp[addr]->irq_controller)
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mcp23s08_irq_teardown(data->mcp[addr]);
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gpiochip_remove(&data->mcp[addr]->chip);
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}
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