gpio: dwapb: Add support for next generation of X-Gene SoC
Next generation of X-Gene SoC's GPIO hardware register map is very similar to DW GPIO. It only differs by a few register addresses. This patch modifies DW GPIO driver to accommodate the difference in a few register addresses. Signed-off-by: Hoan Tran <hotran@apm.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>hifive-unleashed-5.1
Hoan Tran
Linus Walleij
parent
c1ae3cfa0e
commit
a72b8c4a63
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@ -21,6 +21,7 @@
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_device.h>
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#include <linux/of_irq.h>
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#include <linux/platform_device.h>
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#include <linux/property.h>
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@ -55,6 +56,14 @@
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#define GPIO_SWPORT_DR_SIZE (GPIO_SWPORTB_DR - GPIO_SWPORTA_DR)
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#define GPIO_SWPORT_DDR_SIZE (GPIO_SWPORTB_DDR - GPIO_SWPORTA_DDR)
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#define GPIO_REG_OFFSET_V2 1
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#define GPIO_INTMASK_V2 0x44
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#define GPIO_INTTYPE_LEVEL_V2 0x34
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#define GPIO_INT_POLARITY_V2 0x38
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#define GPIO_INTSTATUS_V2 0x3c
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#define GPIO_PORTA_EOI_V2 0x40
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struct dwapb_gpio;
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#ifdef CONFIG_PM_SLEEP
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@ -87,14 +96,41 @@ struct dwapb_gpio {
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struct dwapb_gpio_port *ports;
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unsigned int nr_ports;
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struct irq_domain *domain;
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unsigned int flags;
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};
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static inline u32 gpio_reg_v2_convert(unsigned int offset)
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{
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switch (offset) {
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case GPIO_INTMASK:
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return GPIO_INTMASK_V2;
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case GPIO_INTTYPE_LEVEL:
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return GPIO_INTTYPE_LEVEL_V2;
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case GPIO_INT_POLARITY:
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return GPIO_INT_POLARITY_V2;
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case GPIO_INTSTATUS:
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return GPIO_INTSTATUS_V2;
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case GPIO_PORTA_EOI:
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return GPIO_PORTA_EOI_V2;
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}
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return offset;
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}
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static inline u32 gpio_reg_convert(struct dwapb_gpio *gpio, unsigned int offset)
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{
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if (gpio->flags & GPIO_REG_OFFSET_V2)
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return gpio_reg_v2_convert(offset);
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return offset;
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}
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static inline u32 dwapb_read(struct dwapb_gpio *gpio, unsigned int offset)
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{
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struct gpio_chip *gc = &gpio->ports[0].gc;
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void __iomem *reg_base = gpio->regs;
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return gc->read_reg(reg_base + offset);
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return gc->read_reg(reg_base + gpio_reg_convert(gpio, offset));
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}
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static inline void dwapb_write(struct dwapb_gpio *gpio, unsigned int offset,
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@ -103,7 +139,7 @@ static inline void dwapb_write(struct dwapb_gpio *gpio, unsigned int offset,
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struct gpio_chip *gc = &gpio->ports[0].gc;
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void __iomem *reg_base = gpio->regs;
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gc->write_reg(reg_base + offset, val);
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gc->write_reg(reg_base + gpio_reg_convert(gpio, offset), val);
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}
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static int dwapb_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
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@ -348,8 +384,8 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
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ct->chip.irq_disable = dwapb_irq_disable;
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ct->chip.irq_request_resources = dwapb_irq_reqres;
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ct->chip.irq_release_resources = dwapb_irq_relres;
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ct->regs.ack = GPIO_PORTA_EOI;
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ct->regs.mask = GPIO_INTMASK;
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ct->regs.ack = gpio_reg_convert(gpio, GPIO_PORTA_EOI);
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ct->regs.mask = gpio_reg_convert(gpio, GPIO_INTMASK);
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ct->type = IRQ_TYPE_LEVEL_MASK;
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}
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@ -532,6 +568,21 @@ dwapb_gpio_get_pdata(struct device *dev)
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return pdata;
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}
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static const struct of_device_id dwapb_of_match[] = {
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{ .compatible = "snps,dw-apb-gpio", .data = (void *)0},
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{ .compatible = "apm,xgene-gpio-v2", .data = (void *)GPIO_REG_OFFSET_V2},
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{ /* Sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, dwapb_of_match);
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static const struct acpi_device_id dwapb_acpi_match[] = {
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{"HISI0181", 0},
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{"APMC0D07", 0},
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{"APMC0D81", GPIO_REG_OFFSET_V2},
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{ }
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};
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MODULE_DEVICE_TABLE(acpi, dwapb_acpi_match);
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static int dwapb_gpio_probe(struct platform_device *pdev)
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{
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unsigned int i;
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@ -567,6 +618,25 @@ static int dwapb_gpio_probe(struct platform_device *pdev)
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if (IS_ERR(gpio->regs))
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return PTR_ERR(gpio->regs);
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gpio->flags = 0;
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if (dev->of_node) {
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const struct of_device_id *of_devid;
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of_devid = of_match_device(dwapb_of_match, dev);
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if (of_devid) {
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if (of_devid->data)
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gpio->flags = (uintptr_t)of_devid->data;
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}
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} else if (has_acpi_companion(dev)) {
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const struct acpi_device_id *acpi_id;
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acpi_id = acpi_match_device(dwapb_acpi_match, dev);
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if (acpi_id) {
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if (acpi_id->driver_data)
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gpio->flags = acpi_id->driver_data;
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}
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}
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for (i = 0; i < gpio->nr_ports; i++) {
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err = dwapb_gpio_add_port(gpio, &pdata->properties[i], i);
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if (err)
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@ -593,19 +663,6 @@ static int dwapb_gpio_remove(struct platform_device *pdev)
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return 0;
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}
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static const struct of_device_id dwapb_of_match[] = {
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{ .compatible = "snps,dw-apb-gpio" },
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{ /* Sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, dwapb_of_match);
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static const struct acpi_device_id dwapb_acpi_match[] = {
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{"HISI0181", 0},
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{"APMC0D07", 0},
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{ }
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};
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MODULE_DEVICE_TABLE(acpi, dwapb_acpi_match);
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#ifdef CONFIG_PM_SLEEP
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static int dwapb_gpio_suspend(struct device *dev)
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{
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