diff options
Diffstat (limited to 'drivers/pinctrl/pinctrl-mcp23s08.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-mcp23s08.c | 81 |
1 files changed, 65 insertions, 16 deletions
diff --git a/drivers/pinctrl/pinctrl-mcp23s08.c b/drivers/pinctrl/pinctrl-mcp23s08.c index 5f356edfd0fd..4551575e4e7d 100644 --- a/drivers/pinctrl/pinctrl-mcp23s08.c +++ b/drivers/pinctrl/pinctrl-mcp23s08.c @@ -10,6 +10,7 @@ #include <linux/export.h> #include <linux/gpio/driver.h> #include <linux/gpio/consumer.h> +#include <linux/seq_file.h> #include <linux/slab.h> #include <asm/byteorder.h> #include <linux/interrupt.h> @@ -144,10 +145,9 @@ static int mcp_write(struct mcp23s08 *mcp, unsigned int reg, unsigned int val) return regmap_write(mcp->regmap, reg << mcp->reg_shift, val); } -static int mcp_set_mask(struct mcp23s08 *mcp, unsigned int reg, - unsigned int mask, bool enabled) +static int mcp_update_bits(struct mcp23s08 *mcp, unsigned int reg, + unsigned int mask, unsigned int val) { - u16 val = enabled ? 0xffff : 0x0000; return regmap_update_bits(mcp->regmap, reg << mcp->reg_shift, mask, val); } @@ -156,7 +156,7 @@ static int mcp_set_bit(struct mcp23s08 *mcp, unsigned int reg, unsigned int pin, bool enabled) { u16 mask = BIT(pin); - return mcp_set_mask(mcp, reg, mask, enabled); + return mcp_update_bits(mcp, reg, mask, enabled ? mask : 0); } static const struct pinctrl_pin_desc mcp23x08_pins[] = { @@ -308,9 +308,31 @@ static int mcp23s08_get(struct gpio_chip *chip, unsigned offset) return status; } +static int mcp23s08_get_multiple(struct gpio_chip *chip, + unsigned long *mask, unsigned long *bits) +{ + struct mcp23s08 *mcp = gpiochip_get_data(chip); + unsigned int status; + int ret; + + mutex_lock(&mcp->lock); + + /* REVISIT reading this clears any IRQ ... */ + ret = mcp_read(mcp, MCP_GPIO, &status); + if (ret < 0) + status = 0; + else { + mcp->cached_gpio = status; + *bits = status; + } + + mutex_unlock(&mcp->lock); + return ret; +} + static int __mcp23s08_set(struct mcp23s08 *mcp, unsigned mask, bool value) { - return mcp_set_mask(mcp, MCP_OLAT, mask, value); + return mcp_update_bits(mcp, MCP_OLAT, mask, value ? mask : 0); } static void mcp23s08_set(struct gpio_chip *chip, unsigned offset, int value) @@ -323,6 +345,16 @@ static void mcp23s08_set(struct gpio_chip *chip, unsigned offset, int value) mutex_unlock(&mcp->lock); } +static void mcp23s08_set_multiple(struct gpio_chip *chip, + unsigned long *mask, unsigned long *bits) +{ + struct mcp23s08 *mcp = gpiochip_get_data(chip); + + mutex_lock(&mcp->lock); + mcp_update_bits(mcp, MCP_OLAT, *mask, *bits); + mutex_unlock(&mcp->lock); +} + static int mcp23s08_direction_output(struct gpio_chip *chip, unsigned offset, int value) { @@ -333,7 +365,7 @@ mcp23s08_direction_output(struct gpio_chip *chip, unsigned offset, int value) mutex_lock(&mcp->lock); status = __mcp23s08_set(mcp, mask, value); if (status == 0) { - status = mcp_set_mask(mcp, MCP_IODIR, mask, false); + status = mcp_update_bits(mcp, MCP_IODIR, mask, 0); } mutex_unlock(&mcp->lock); return status; @@ -436,17 +468,19 @@ static void mcp23s08_irq_mask(struct irq_data *data) { struct gpio_chip *gc = irq_data_get_irq_chip_data(data); struct mcp23s08 *mcp = gpiochip_get_data(gc); - unsigned int pos = data->hwirq; + unsigned int pos = irqd_to_hwirq(data); mcp_set_bit(mcp, MCP_GPINTEN, pos, false); + gpiochip_disable_irq(gc, pos); } static void mcp23s08_irq_unmask(struct irq_data *data) { struct gpio_chip *gc = irq_data_get_irq_chip_data(data); struct mcp23s08 *mcp = gpiochip_get_data(gc); - unsigned int pos = data->hwirq; + unsigned int pos = irqd_to_hwirq(data); + gpiochip_enable_irq(gc, pos); mcp_set_bit(mcp, MCP_GPINTEN, pos, true); } @@ -454,7 +488,7 @@ static int mcp23s08_irq_set_type(struct irq_data *data, unsigned int type) { struct gpio_chip *gc = irq_data_get_irq_chip_data(data); struct mcp23s08 *mcp = gpiochip_get_data(gc); - unsigned int pos = data->hwirq; + unsigned int pos = irqd_to_hwirq(data); if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) { mcp_set_bit(mcp, MCP_INTCON, pos, false); @@ -523,6 +557,25 @@ static int mcp23s08_irq_setup(struct mcp23s08 *mcp) return 0; } +static void mcp23s08_irq_print_chip(struct irq_data *d, struct seq_file *p) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct mcp23s08 *mcp = gpiochip_get_data(gc); + + seq_printf(p, dev_name(mcp->dev)); +} + +static const struct irq_chip mcp23s08_irq_chip = { + .irq_mask = mcp23s08_irq_mask, + .irq_unmask = mcp23s08_irq_unmask, + .irq_set_type = mcp23s08_irq_set_type, + .irq_bus_lock = mcp23s08_irq_bus_lock, + .irq_bus_sync_unlock = mcp23s08_irq_bus_unlock, + .irq_print_chip = mcp23s08_irq_print_chip, + .flags = IRQCHIP_IMMUTABLE, + GPIOCHIP_IRQ_RESOURCE_HELPERS, +}; + /*----------------------------------------------------------------------*/ int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, @@ -538,17 +591,13 @@ int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, mcp->addr = addr; mcp->irq_active_high = false; - mcp->irq_chip.name = dev_name(dev); - mcp->irq_chip.irq_mask = mcp23s08_irq_mask; - mcp->irq_chip.irq_unmask = mcp23s08_irq_unmask; - mcp->irq_chip.irq_set_type = mcp23s08_irq_set_type; - mcp->irq_chip.irq_bus_lock = mcp23s08_irq_bus_lock; - mcp->irq_chip.irq_bus_sync_unlock = mcp23s08_irq_bus_unlock; mcp->chip.direction_input = mcp23s08_direction_input; mcp->chip.get = mcp23s08_get; + mcp->chip.get_multiple = mcp23s08_get_multiple; mcp->chip.direction_output = mcp23s08_direction_output; mcp->chip.set = mcp23s08_set; + mcp->chip.set_multiple = mcp23s08_set_multiple; mcp->chip.base = base; mcp->chip.can_sleep = true; @@ -603,7 +652,7 @@ int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, if (mcp->irq && mcp->irq_controller) { struct gpio_irq_chip *girq = &mcp->chip.irq; - girq->chip = &mcp->irq_chip; + gpio_irq_chip_set_chip(girq, &mcp23s08_irq_chip); /* This will let us handle the parent IRQ in the driver */ girq->parent_handler = NULL; girq->num_parents = 0; |