diff options
| -rw-r--r-- | drivers/pinctrl/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/pinctrl/pinctrl-coh901.c | 204 |
2 files changed, 54 insertions, 151 deletions
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index a05087bd195..0c6eb33daa8 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -324,6 +324,7 @@ config PINCTRL_U300 config PINCTRL_COH901 bool "ST-Ericsson U300 COH 901 335/571 GPIO" depends on GPIOLIB && ARCH_U300 && PINCTRL_U300 + select GPIOLIB_IRQCHIP help Say yes here to support GPIO interface on ST-Ericsson U300. The names of the two IP block variants supported are diff --git a/drivers/pinctrl/pinctrl-coh901.c b/drivers/pinctrl/pinctrl-coh901.c index 749db595640..d182fdd2e71 100644 --- a/drivers/pinctrl/pinctrl-coh901.c +++ b/drivers/pinctrl/pinctrl-coh901.c @@ -8,17 +8,14 @@ * Author: Jonas Aaberg <jonas.aberg@stericsson.com> */ #include <linux/module.h> -#include <linux/irq.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/io.h> -#include <linux/irqdomain.h> #include <linux/clk.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/gpio.h> -#include <linux/list.h> #include <linux/slab.h> #include <linux/pinctrl/consumer.h> #include <linux/pinctrl/pinconf-generic.h> @@ -61,9 +58,17 @@ #define U300_GPIO_PINS_PER_PORT 8 #define U300_GPIO_MAX (U300_GPIO_PINS_PER_PORT * U300_GPIO_NUM_PORTS) +struct u300_gpio_port { + struct u300_gpio *gpio; + char name[8]; + int irq; + int number; + u8 toggle_edge_mode; +}; + struct u300_gpio { struct gpio_chip chip; - struct list_head port_list; + struct u300_gpio_port ports[U300_GPIO_NUM_PORTS]; struct clk *clk; void __iomem *base; struct device *dev; @@ -78,16 +83,6 @@ struct u300_gpio { u32 iev; }; -struct u300_gpio_port { - struct list_head node; - struct u300_gpio *gpio; - char name[8]; - struct irq_domain *domain; - int irq; - int number; - u8 toggle_edge_mode; -}; - /* * Macro to expand to read a specific register found in the "gpio" * struct. It requires the struct u300_gpio *gpio variable to exist in @@ -308,39 +303,6 @@ static int u300_gpio_direction_output(struct gpio_chip *chip, unsigned offset, return 0; } -static int u300_gpio_to_irq(struct gpio_chip *chip, unsigned offset) -{ - struct u300_gpio *gpio = to_u300_gpio(chip); - int portno = offset >> 3; - struct u300_gpio_port *port = NULL; - struct list_head *p; - int retirq; - bool found = false; - - list_for_each(p, &gpio->port_list) { - port = list_entry(p, struct u300_gpio_port, node); - if (port->number == portno) { - found = true; - break; - } - } - if (!found) { - dev_err(gpio->dev, "could not locate port for GPIO %d IRQ\n", - offset); - return -EINVAL; - } - - /* - * The local hwirqs on the port are the lower three bits, there - * are exactly 8 IRQs per port since they are 8-bit - */ - retirq = irq_find_mapping(port->domain, (offset & 0x7)); - - dev_dbg(gpio->dev, "request IRQ for GPIO %d, return %d from port %d\n", - offset, retirq, port->number); - return retirq; -} - /* Returning -EINVAL means "supported but not available" */ int u300_gpio_config_get(struct gpio_chip *chip, unsigned offset, @@ -461,7 +423,6 @@ static struct gpio_chip u300_gpio_chip = { .set = u300_gpio_set, .direction_input = u300_gpio_direction_input, .direction_output = u300_gpio_direction_output, - .to_irq = u300_gpio_to_irq, }; static void u300_toggle_trigger(struct u300_gpio *gpio, unsigned offset) @@ -485,9 +446,10 @@ static void u300_toggle_trigger(struct u300_gpio *gpio, unsigned offset) static int u300_gpio_irq_type(struct irq_data *d, unsigned trigger) { - struct u300_gpio_port *port = irq_data_get_irq_chip_data(d); - struct u300_gpio *gpio = port->gpio; - int offset = (port->number << 3) + d->hwirq; + struct gpio_chip *chip = irq_data_get_irq_chip_data(d); + struct u300_gpio *gpio = to_u300_gpio(chip); + struct u300_gpio_port *port = &gpio->ports[d->hwirq >> 3]; + int offset = d->hwirq; u32 val; if ((trigger & IRQF_TRIGGER_RISING) && @@ -521,9 +483,10 @@ static int u300_gpio_irq_type(struct irq_data *d, unsigned trigger) static void u300_gpio_irq_enable(struct irq_data *d) { - struct u300_gpio_port *port = irq_data_get_irq_chip_data(d); - struct u300_gpio *gpio = port->gpio; - int offset = (port->number << 3) + d->hwirq; + struct gpio_chip *chip = irq_data_get_irq_chip_data(d); + struct u300_gpio *gpio = to_u300_gpio(chip); + struct u300_gpio_port *port = &gpio->ports[d->hwirq >> 3]; + int offset = d->hwirq; u32 val; unsigned long flags; @@ -537,9 +500,9 @@ static void u300_gpio_irq_enable(struct irq_data *d) static void u300_gpio_irq_disable(struct irq_data *d) { - struct u300_gpio_port *port = irq_data_get_irq_chip_data(d); - struct u300_gpio *gpio = port->gpio; - int offset = (port->number << 3) + d->hwirq; + struct gpio_chip *chip = irq_data_get_irq_chip_data(d); + struct u300_gpio *gpio = to_u300_gpio(chip); + int offset = d->hwirq; u32 val; unsigned long flags; @@ -549,45 +512,24 @@ static void u300_gpio_irq_disable(struct irq_data *d) local_irq_restore(flags); } -static int u300_gpio_irq_reqres(struct irq_data *d) -{ - struct u300_gpio_port *port = irq_data_get_irq_chip_data(d); - struct u300_gpio *gpio = port->gpio; - - if (gpio_lock_as_irq(&gpio->chip, d->hwirq)) { - dev_err(gpio->dev, - "unable to lock HW IRQ %lu for IRQ\n", - d->hwirq); - return -EINVAL; - } - return 0; -} - -static void u300_gpio_irq_relres(struct irq_data *d) -{ - struct u300_gpio_port *port = irq_data_get_irq_chip_data(d); - struct u300_gpio *gpio = port->gpio; - - gpio_unlock_as_irq(&gpio->chip, d->hwirq); -} - static struct irq_chip u300_gpio_irqchip = { .name = "u300-gpio-irqchip", .irq_enable = u300_gpio_irq_enable, .irq_disable = u300_gpio_irq_disable, .irq_set_type = u300_gpio_irq_type, - .irq_request_resources = u300_gpio_irq_reqres, - .irq_release_resources = u300_gpio_irq_relres, }; static void u300_gpio_irq_handler(unsigned irq, struct irq_desc *desc) { - struct u300_gpio_port *port = irq_get_handler_data(irq); - struct u300_gpio *gpio = port->gpio; + struct irq_chip *parent_chip = irq_get_chip(irq); + struct gpio_chip *chip = irq_get_handler_data(irq); + struct u300_gpio *gpio = to_u300_gpio(chip); + struct u300_gpio_port *port = &gpio->ports[irq - chip->base]; int pinoffset = port->number << 3; /* get the right stride */ unsigned long val; - desc->irq_data.chip->irq_ack(&desc->irq_data); + chained_irq_enter(parent_chip, desc); + /* Read event register */ val = readl(U300_PIN_REG(pinoffset, iev)); /* Mask relevant bits */ @@ -600,8 +542,8 @@ static void u300_gpio_irq_handler(unsigned irq, struct irq_desc *desc) int irqoffset; for_each_set_bit(irqoffset, &val, U300_GPIO_PINS_PER_PORT) { - int pin_irq = irq_find_mapping(port->domain, irqoffset); int offset = pinoffset + irqoffset; + int pin_irq = irq_find_mapping(chip->irqdomain, offset); dev_dbg(gpio->dev, "GPIO IRQ %d on pin %d\n", pin_irq, offset); @@ -615,7 +557,7 @@ static void u300_gpio_irq_handler(unsigned irq, struct irq_desc *desc) } } - desc->irq_data.chip->irq_unmask(&desc->irq_data); + chained_irq_exit(parent_chip, desc); } static void __init u300_gpio_init_pin(struct u300_gpio *gpio, @@ -666,20 +608,6 @@ static void __init u300_gpio_init_coh901571(struct u300_gpio *gpio) } } -static inline void u300_gpio_free_ports(struct u300_gpio *gpio) -{ - struct u300_gpio_port *port; - struct list_head *p, *n; - - list_for_each_safe(p, n, &gpio->port_list) { - port = list_entry(p, struct u300_gpio_port, node); - list_del(&port->node); - if (port->domain) - irq_domain_remove(port->domain); - kfree(port); - } -} - /* * Here we map a GPIO in the local gpio_chip pin space to a pin in * the local pinctrl pin space. The pin controller used is @@ -770,17 +698,28 @@ static int __init u300_gpio_probe(struct platform_device *pdev) gpio->base + U300_GPIO_CR); u300_gpio_init_coh901571(gpio); +#ifdef CONFIG_OF_GPIO + gpio->chip.of_node = pdev->dev.of_node; +#endif + err = gpiochip_add(&gpio->chip); + if (err) { + dev_err(gpio->dev, "unable to add gpiochip: %d\n", err); + goto err_no_chip; + } + + err = gpiochip_irqchip_add(&gpio->chip, + &u300_gpio_irqchip, + 0, + handle_simple_irq, + IRQ_TYPE_EDGE_FALLING); + if (err) { + dev_err(gpio->dev, "no GPIO irqchip\n"); + goto err_no_irqchip; + } + /* Add each port with its IRQ separately */ - INIT_LIST_HEAD(&gpio->port_list); for (portno = 0 ; portno < U300_GPIO_NUM_PORTS; portno++) { - struct u300_gpio_port *port = - kmalloc(sizeof(struct u300_gpio_port), GFP_KERNEL); - - if (!port) { - dev_err(gpio->dev, "out of memory\n"); - err = -ENOMEM; - goto err_no_port; - } + struct u300_gpio_port *port = &gpio->ports[portno]; snprintf(port->name, 8, "gpio%d", portno); port->number = portno; @@ -788,50 +727,16 @@ static int __init u300_gpio_probe(struct platform_device *pdev) port->irq = platform_get_irq(pdev, portno); - dev_dbg(gpio->dev, "register IRQ %d for port %s\n", port->irq, - port->name); - - port->domain = irq_domain_add_linear(pdev->dev.of_node, - U300_GPIO_PINS_PER_PORT, - &irq_domain_simple_ops, - port); - if (!port->domain) { - err = -ENOMEM; - goto err_no_domain; - } - - irq_set_chained_handler(port->irq, u300_gpio_irq_handler); - irq_set_handler_data(port->irq, port); - - /* For each GPIO pin set the unique IRQ handler */ - for (i = 0; i < U300_GPIO_PINS_PER_PORT; i++) { - int irqno = irq_create_mapping(port->domain, i); - - dev_dbg(gpio->dev, "GPIO%d on port %s gets IRQ %d\n", - gpio->chip.base + (port->number << 3) + i, - port->name, irqno); - irq_set_chip_and_handler(irqno, &u300_gpio_irqchip, - handle_simple_irq); - set_irq_flags(irqno, IRQF_VALID); - irq_set_chip_data(irqno, port); - } + gpiochip_set_chained_irqchip(&gpio->chip, + &u300_gpio_irqchip, + port->irq, + u300_gpio_irq_handler); /* Turns off irq force (test register) for this port */ writel(0x0, gpio->base + portno * gpio->stride + ifr); - - list_add_tail(&port->node, &gpio->port_list); } dev_dbg(gpio->dev, "initialized %d GPIO ports\n", portno); -#ifdef CONFIG_OF_GPIO - gpio->chip.of_node = pdev->dev.of_node; -#endif - err = gpiochip_add(&gpio->chip); - if (err) { - dev_err(gpio->dev, "unable to add gpiochip: %d\n", err); - goto err_no_chip; - } - /* * Add pinctrl pin ranges, the pin controller must be registered * at this point @@ -850,12 +755,10 @@ static int __init u300_gpio_probe(struct platform_device *pdev) return 0; err_no_range: +err_no_irqchip: if (gpiochip_remove(&gpio->chip)) dev_err(&pdev->dev, "failed to remove gpio chip\n"); err_no_chip: -err_no_domain: -err_no_port: - u300_gpio_free_ports(gpio); clk_disable_unprepare(gpio->clk); dev_err(&pdev->dev, "module ERROR:%d\n", err); return err; @@ -874,7 +777,6 @@ static int __exit u300_gpio_remove(struct platform_device *pdev) dev_err(gpio->dev, "unable to remove gpiochip: %d\n", err); return err; } - u300_gpio_free_ports(gpio); clk_disable_unprepare(gpio->clk); return 0; } |