Lines Matching full:gpio
13 #include <linux/gpio/driver.h>
29 #include <linux/platform_data/gpio-dwapb.h>
54 #define DWAPB_DRIVER_NAME "gpio-dwapb"
72 /* Store GPIO context across system-wide suspend/resume transitions */
89 struct dwapb_gpio *gpio; member
125 static inline u32 gpio_reg_convert(struct dwapb_gpio *gpio, unsigned int offset) in gpio_reg_convert() argument
127 if (gpio->flags & GPIO_REG_OFFSET_V2) in gpio_reg_convert()
133 static inline u32 dwapb_read(struct dwapb_gpio *gpio, unsigned int offset) in dwapb_read() argument
135 struct gpio_chip *gc = &gpio->ports[0].gc; in dwapb_read()
136 void __iomem *reg_base = gpio->regs; in dwapb_read()
138 return gc->read_reg(reg_base + gpio_reg_convert(gpio, offset)); in dwapb_read()
141 static inline void dwapb_write(struct dwapb_gpio *gpio, unsigned int offset, in dwapb_write() argument
144 struct gpio_chip *gc = &gpio->ports[0].gc; in dwapb_write()
145 void __iomem *reg_base = gpio->regs; in dwapb_write()
147 gc->write_reg(reg_base + gpio_reg_convert(gpio, offset), val); in dwapb_write()
153 struct dwapb_gpio *gpio = port->gpio; in dwapb_gpio_to_irq() local
155 return irq_find_mapping(gpio->domain, offset); in dwapb_gpio_to_irq()
158 static struct dwapb_gpio_port *dwapb_offs_to_port(struct dwapb_gpio *gpio, unsigned int offs) in dwapb_offs_to_port() argument
163 for (i = 0; i < gpio->nr_ports; i++) { in dwapb_offs_to_port()
164 port = &gpio->ports[i]; in dwapb_offs_to_port()
172 static void dwapb_toggle_trigger(struct dwapb_gpio *gpio, unsigned int offs) in dwapb_toggle_trigger() argument
174 struct dwapb_gpio_port *port = dwapb_offs_to_port(gpio, offs); in dwapb_toggle_trigger()
183 pol = dwapb_read(gpio, GPIO_INT_POLARITY); in dwapb_toggle_trigger()
191 dwapb_write(gpio, GPIO_INT_POLARITY, pol); in dwapb_toggle_trigger()
194 static u32 dwapb_do_irq(struct dwapb_gpio *gpio) in dwapb_do_irq() argument
196 u32 irq_status = dwapb_read(gpio, GPIO_INTSTATUS); in dwapb_do_irq()
201 int gpio_irq = irq_find_mapping(gpio->domain, hwirq); in dwapb_do_irq()
208 dwapb_toggle_trigger(gpio, hwirq); in dwapb_do_irq()
216 struct dwapb_gpio *gpio = irq_desc_get_handler_data(desc); in dwapb_irq_handler() local
219 dwapb_do_irq(gpio); in dwapb_irq_handler()
228 struct dwapb_gpio *gpio = igc->private; in dwapb_irq_enable() local
229 struct gpio_chip *gc = &gpio->ports[0].gc; in dwapb_irq_enable()
234 val = dwapb_read(gpio, GPIO_INTEN); in dwapb_irq_enable()
236 dwapb_write(gpio, GPIO_INTEN, val); in dwapb_irq_enable()
243 struct dwapb_gpio *gpio = igc->private; in dwapb_irq_disable() local
244 struct gpio_chip *gc = &gpio->ports[0].gc; in dwapb_irq_disable()
249 val = dwapb_read(gpio, GPIO_INTEN); in dwapb_irq_disable()
251 dwapb_write(gpio, GPIO_INTEN, val); in dwapb_irq_disable()
258 struct dwapb_gpio *gpio = igc->private; in dwapb_irq_reqres() local
259 struct gpio_chip *gc = &gpio->ports[0].gc; in dwapb_irq_reqres()
264 dev_err(gpio->dev, "unable to lock HW IRQ %lu for IRQ\n", in dwapb_irq_reqres()
274 struct dwapb_gpio *gpio = igc->private; in dwapb_irq_relres() local
275 struct gpio_chip *gc = &gpio->ports[0].gc; in dwapb_irq_relres()
283 struct dwapb_gpio *gpio = igc->private; in dwapb_irq_set_type() local
284 struct gpio_chip *gc = &gpio->ports[0].gc; in dwapb_irq_set_type()
293 level = dwapb_read(gpio, GPIO_INTTYPE_LEVEL); in dwapb_irq_set_type()
294 polarity = dwapb_read(gpio, GPIO_INT_POLARITY); in dwapb_irq_set_type()
299 dwapb_toggle_trigger(gpio, bit); in dwapb_irq_set_type()
321 dwapb_write(gpio, GPIO_INTTYPE_LEVEL, level); in dwapb_irq_set_type()
323 dwapb_write(gpio, GPIO_INT_POLARITY, polarity); in dwapb_irq_set_type()
333 struct dwapb_gpio *gpio = igc->private; in dwapb_irq_set_wake() local
334 struct dwapb_context *ctx = gpio->ports[0].ctx; in dwapb_irq_set_wake()
349 struct dwapb_gpio *gpio = port->gpio; in dwapb_gpio_set_debounce() local
355 val_deb = dwapb_read(gpio, GPIO_PORTA_DEBOUNCE); in dwapb_gpio_set_debounce()
357 dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, val_deb | mask); in dwapb_gpio_set_debounce()
359 dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, val_deb & ~mask); in dwapb_gpio_set_debounce()
381 struct dwapb_gpio *gpio = dev_id; in dwapb_irq_handler_mfd() local
383 worked = dwapb_do_irq(gpio); in dwapb_irq_handler_mfd()
388 static void dwapb_configure_irqs(struct dwapb_gpio *gpio, in dwapb_configure_irqs() argument
399 gpio->domain = irq_domain_create_linear(fwnode, ngpio, in dwapb_configure_irqs()
400 &irq_generic_chip_ops, gpio); in dwapb_configure_irqs()
401 if (!gpio->domain) in dwapb_configure_irqs()
404 err = irq_alloc_domain_generic_chips(gpio->domain, ngpio, 2, in dwapb_configure_irqs()
409 dev_info(gpio->dev, "irq_alloc_domain_generic_chips failed\n"); in dwapb_configure_irqs()
410 irq_domain_remove(gpio->domain); in dwapb_configure_irqs()
411 gpio->domain = NULL; in dwapb_configure_irqs()
415 irq_gc = irq_get_domain_generic_chip(gpio->domain, 0); in dwapb_configure_irqs()
417 irq_domain_remove(gpio->domain); in dwapb_configure_irqs()
418 gpio->domain = NULL; in dwapb_configure_irqs()
422 irq_gc->reg_base = gpio->regs; in dwapb_configure_irqs()
423 irq_gc->private = gpio; in dwapb_configure_irqs()
438 ct->regs.ack = gpio_reg_convert(gpio, GPIO_PORTA_EOI); in dwapb_configure_irqs()
439 ct->regs.mask = gpio_reg_convert(gpio, GPIO_INTMASK); in dwapb_configure_irqs()
453 dwapb_irq_handler, gpio); in dwapb_configure_irqs()
460 err = devm_request_irq(gpio->dev, pp->irq[0], in dwapb_configure_irqs()
462 IRQF_SHARED, DWAPB_DRIVER_NAME, gpio); in dwapb_configure_irqs()
464 dev_err(gpio->dev, "error requesting IRQ\n"); in dwapb_configure_irqs()
465 irq_domain_remove(gpio->domain); in dwapb_configure_irqs()
466 gpio->domain = NULL; in dwapb_configure_irqs()
472 irq_create_mapping(gpio->domain, hwirq); in dwapb_configure_irqs()
477 static void dwapb_irq_teardown(struct dwapb_gpio *gpio) in dwapb_irq_teardown() argument
479 struct dwapb_gpio_port *port = &gpio->ports[0]; in dwapb_irq_teardown()
484 if (!gpio->domain) in dwapb_irq_teardown()
488 irq_dispose_mapping(irq_find_mapping(gpio->domain, hwirq)); in dwapb_irq_teardown()
490 irq_domain_remove(gpio->domain); in dwapb_irq_teardown()
491 gpio->domain = NULL; in dwapb_irq_teardown()
494 static int dwapb_gpio_add_port(struct dwapb_gpio *gpio, in dwapb_gpio_add_port() argument
502 port = &gpio->ports[offs]; in dwapb_gpio_add_port()
503 port->gpio = gpio; in dwapb_gpio_add_port()
507 port->ctx = devm_kzalloc(gpio->dev, sizeof(*port->ctx), GFP_KERNEL); in dwapb_gpio_add_port()
512 dat = gpio->regs + GPIO_EXT_PORTA + (pp->idx * GPIO_EXT_PORT_STRIDE); in dwapb_gpio_add_port()
513 set = gpio->regs + GPIO_SWPORTA_DR + (pp->idx * GPIO_SWPORT_DR_STRIDE); in dwapb_gpio_add_port()
514 dirout = gpio->regs + GPIO_SWPORTA_DDR + in dwapb_gpio_add_port()
517 /* This registers 32 GPIO lines per port */ in dwapb_gpio_add_port()
518 err = bgpio_init(&port->gc, gpio->dev, 4, dat, set, NULL, dirout, in dwapb_gpio_add_port()
521 dev_err(gpio->dev, "failed to init gpio chip for port%d\n", in dwapb_gpio_add_port()
537 dwapb_configure_irqs(gpio, port, pp); in dwapb_gpio_add_port()
541 dev_err(gpio->dev, "failed to register gpiochip for port%d\n", in dwapb_gpio_add_port()
546 /* Add GPIO-signaled ACPI event support */ in dwapb_gpio_add_port()
554 static void dwapb_gpio_unregister(struct dwapb_gpio *gpio) in dwapb_gpio_unregister() argument
558 for (m = 0; m < gpio->nr_ports; ++m) { in dwapb_gpio_unregister()
559 struct dwapb_gpio_port *port = &gpio->ports[m]; in dwapb_gpio_unregister()
650 { .compatible = "snps,dw-apb-gpio", .data = (void *)0},
651 { .compatible = "apm,xgene-gpio-v2", .data = (void *)GPIO_REG_OFFSET_V2},
668 struct dwapb_gpio *gpio; in dwapb_gpio_probe() local
682 gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); in dwapb_gpio_probe()
683 if (!gpio) in dwapb_gpio_probe()
686 gpio->dev = &pdev->dev; in dwapb_gpio_probe()
687 gpio->nr_ports = pdata->nports; in dwapb_gpio_probe()
689 gpio->rst = devm_reset_control_get_optional_shared(dev, NULL); in dwapb_gpio_probe()
690 if (IS_ERR(gpio->rst)) in dwapb_gpio_probe()
691 return PTR_ERR(gpio->rst); in dwapb_gpio_probe()
693 reset_control_deassert(gpio->rst); in dwapb_gpio_probe()
695 gpio->ports = devm_kcalloc(&pdev->dev, gpio->nr_ports, in dwapb_gpio_probe()
696 sizeof(*gpio->ports), GFP_KERNEL); in dwapb_gpio_probe()
697 if (!gpio->ports) in dwapb_gpio_probe()
701 gpio->regs = devm_ioremap_resource(&pdev->dev, res); in dwapb_gpio_probe()
702 if (IS_ERR(gpio->regs)) in dwapb_gpio_probe()
703 return PTR_ERR(gpio->regs); in dwapb_gpio_probe()
706 gpio->clk = devm_clk_get(&pdev->dev, "bus"); in dwapb_gpio_probe()
707 if (!IS_ERR(gpio->clk)) { in dwapb_gpio_probe()
708 err = clk_prepare_enable(gpio->clk); in dwapb_gpio_probe()
715 gpio->flags = 0; in dwapb_gpio_probe()
717 gpio->flags = (uintptr_t)of_device_get_match_data(dev); in dwapb_gpio_probe()
724 gpio->flags = acpi_id->driver_data; in dwapb_gpio_probe()
728 for (i = 0; i < gpio->nr_ports; i++) { in dwapb_gpio_probe()
729 err = dwapb_gpio_add_port(gpio, &pdata->properties[i], i); in dwapb_gpio_probe()
733 platform_set_drvdata(pdev, gpio); in dwapb_gpio_probe()
738 dwapb_gpio_unregister(gpio); in dwapb_gpio_probe()
739 dwapb_irq_teardown(gpio); in dwapb_gpio_probe()
740 clk_disable_unprepare(gpio->clk); in dwapb_gpio_probe()
747 struct dwapb_gpio *gpio = platform_get_drvdata(pdev); in dwapb_gpio_remove() local
749 dwapb_gpio_unregister(gpio); in dwapb_gpio_remove()
750 dwapb_irq_teardown(gpio); in dwapb_gpio_remove()
751 reset_control_assert(gpio->rst); in dwapb_gpio_remove()
752 clk_disable_unprepare(gpio->clk); in dwapb_gpio_remove()
761 struct dwapb_gpio *gpio = platform_get_drvdata(pdev); in dwapb_gpio_suspend() local
762 struct gpio_chip *gc = &gpio->ports[0].gc; in dwapb_gpio_suspend()
767 for (i = 0; i < gpio->nr_ports; i++) { in dwapb_gpio_suspend()
769 unsigned int idx = gpio->ports[i].idx; in dwapb_gpio_suspend()
770 struct dwapb_context *ctx = gpio->ports[i].ctx; in dwapb_gpio_suspend()
775 ctx->dir = dwapb_read(gpio, offset); in dwapb_gpio_suspend()
778 ctx->data = dwapb_read(gpio, offset); in dwapb_gpio_suspend()
781 ctx->ext = dwapb_read(gpio, offset); in dwapb_gpio_suspend()
785 ctx->int_mask = dwapb_read(gpio, GPIO_INTMASK); in dwapb_gpio_suspend()
786 ctx->int_en = dwapb_read(gpio, GPIO_INTEN); in dwapb_gpio_suspend()
787 ctx->int_pol = dwapb_read(gpio, GPIO_INT_POLARITY); in dwapb_gpio_suspend()
788 ctx->int_type = dwapb_read(gpio, GPIO_INTTYPE_LEVEL); in dwapb_gpio_suspend()
789 ctx->int_deb = dwapb_read(gpio, GPIO_PORTA_DEBOUNCE); in dwapb_gpio_suspend()
792 dwapb_write(gpio, GPIO_INTMASK, in dwapb_gpio_suspend()
798 clk_disable_unprepare(gpio->clk); in dwapb_gpio_suspend()
806 struct dwapb_gpio *gpio = platform_get_drvdata(pdev); in dwapb_gpio_resume() local
807 struct gpio_chip *gc = &gpio->ports[0].gc; in dwapb_gpio_resume()
811 if (!IS_ERR(gpio->clk)) in dwapb_gpio_resume()
812 clk_prepare_enable(gpio->clk); in dwapb_gpio_resume()
815 for (i = 0; i < gpio->nr_ports; i++) { in dwapb_gpio_resume()
817 unsigned int idx = gpio->ports[i].idx; in dwapb_gpio_resume()
818 struct dwapb_context *ctx = gpio->ports[i].ctx; in dwapb_gpio_resume()
823 dwapb_write(gpio, offset, ctx->data); in dwapb_gpio_resume()
826 dwapb_write(gpio, offset, ctx->dir); in dwapb_gpio_resume()
829 dwapb_write(gpio, offset, ctx->ext); in dwapb_gpio_resume()
833 dwapb_write(gpio, GPIO_INTTYPE_LEVEL, ctx->int_type); in dwapb_gpio_resume()
834 dwapb_write(gpio, GPIO_INT_POLARITY, ctx->int_pol); in dwapb_gpio_resume()
835 dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, ctx->int_deb); in dwapb_gpio_resume()
836 dwapb_write(gpio, GPIO_INTEN, ctx->int_en); in dwapb_gpio_resume()
837 dwapb_write(gpio, GPIO_INTMASK, ctx->int_mask); in dwapb_gpio_resume()
840 dwapb_write(gpio, GPIO_PORTA_EOI, 0xffffffff); in dwapb_gpio_resume()
867 MODULE_DESCRIPTION("Synopsys DesignWare APB GPIO driver");