diff options
Diffstat (limited to 'drivers/gpio/gpio-mxc.c')
| -rw-r--r-- | drivers/gpio/gpio-mxc.c | 92 |
1 files changed, 91 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c index c871602fc5ba..d5626c572d24 100644 --- a/drivers/gpio/gpio-mxc.c +++ b/drivers/gpio/gpio-mxc.c @@ -24,6 +24,12 @@ #include <linux/of_device.h> #include <linux/bug.h> +#define IMX_SCU_WAKEUP_OFF 0 +#define IMX_SCU_WAKEUP_LOW_LVL 4 +#define IMX_SCU_WAKEUP_FALL_EDGE 5 +#define IMX_SCU_WAKEUP_RISE_EDGE 6 +#define IMX_SCU_WAKEUP_HIGH_LVL 7 + /* device type dependent stuff */ struct mxc_gpio_hwdata { unsigned dr_reg; @@ -61,6 +67,9 @@ struct mxc_gpio_port { u32 both_edges; struct mxc_gpio_reg_saved gpio_saved_reg; bool power_off; + u32 wakeup_pads; + bool is_pad_wakeup; + u32 pad_type[32]; const struct mxc_gpio_hwdata *hwdata; }; @@ -130,6 +139,9 @@ static const struct of_device_id mxc_gpio_dt_ids[] = { { .compatible = "fsl,imx31-gpio", .data = &imx31_gpio_hwdata }, { .compatible = "fsl,imx35-gpio", .data = &imx35_gpio_hwdata }, { .compatible = "fsl,imx7d-gpio", .data = &imx35_gpio_hwdata }, + { .compatible = "fsl,imx8dxl-gpio", .data = &imx35_gpio_hwdata }, + { .compatible = "fsl,imx8qm-gpio", .data = &imx35_gpio_hwdata }, + { .compatible = "fsl,imx8qxp-gpio", .data = &imx35_gpio_hwdata }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, mxc_gpio_dt_ids); @@ -203,6 +215,7 @@ static int gpio_set_irq_type(struct irq_data *d, u32 type) } writel(1 << gpio_idx, port->base + GPIO_ISR); + port->pad_type[gpio_idx] = type; return 0; } @@ -254,6 +267,9 @@ static void mx3_gpio_irq_handler(struct irq_desc *desc) struct mxc_gpio_port *port = irq_desc_get_handler_data(desc); struct irq_chip *chip = irq_desc_get_chip(desc); + if (port->is_pad_wakeup) + return; + chained_irq_enter(chip, desc); irq_stat = readl(port->base + GPIO_ISR) & readl(port->base + GPIO_IMR); @@ -306,11 +322,13 @@ static int gpio_set_wake_irq(struct irq_data *d, u32 enable) ret = enable_irq_wake(port->irq_high); else ret = enable_irq_wake(port->irq); + port->wakeup_pads |= (1 << gpio_idx); } else { if (port->irq_high && (gpio_idx >= 16)) ret = disable_irq_wake(port->irq_high); else ret = disable_irq_wake(port->irq); + port->wakeup_pads &= ~(1 << gpio_idx); } return ret; @@ -365,7 +383,6 @@ static int mxc_gpio_probe(struct platform_device *pdev) return -ENOMEM; port->dev = &pdev->dev; - port->hwdata = device_get_match_data(&pdev->dev); port->base = devm_platform_ioremap_resource(pdev, 0); @@ -498,6 +515,78 @@ static void mxc_gpio_restore_regs(struct mxc_gpio_port *port) writel(port->gpio_saved_reg.dr, port->base + GPIO_DR); } +static bool mxc_gpio_generic_config(struct mxc_gpio_port *port, + unsigned int offset, unsigned long conf) +{ + struct device_node *np = port->dev->of_node; + + if (of_device_is_compatible(np, "fsl,imx8dxl-gpio") || + of_device_is_compatible(np, "fsl,imx8qxp-gpio") || + of_device_is_compatible(np, "fsl,imx8qm-gpio")) + return (gpiochip_generic_config(&port->gc, offset, conf) == 0); + + return false; +} + +static bool mxc_gpio_set_pad_wakeup(struct mxc_gpio_port *port, bool enable) +{ + unsigned long config; + bool ret = false; + int i, type; + + static const u32 pad_type_map[] = { + IMX_SCU_WAKEUP_OFF, /* 0 */ + IMX_SCU_WAKEUP_RISE_EDGE, /* IRQ_TYPE_EDGE_RISING */ + IMX_SCU_WAKEUP_FALL_EDGE, /* IRQ_TYPE_EDGE_FALLING */ + IMX_SCU_WAKEUP_FALL_EDGE, /* IRQ_TYPE_EDGE_BOTH */ + IMX_SCU_WAKEUP_HIGH_LVL, /* IRQ_TYPE_LEVEL_HIGH */ + IMX_SCU_WAKEUP_OFF, /* 5 */ + IMX_SCU_WAKEUP_OFF, /* 6 */ + IMX_SCU_WAKEUP_OFF, /* 7 */ + IMX_SCU_WAKEUP_LOW_LVL, /* IRQ_TYPE_LEVEL_LOW */ + }; + + for (i = 0; i < 32; i++) { + if ((port->wakeup_pads & (1 << i))) { + type = port->pad_type[i]; + if (enable) + config = pad_type_map[type]; + else + config = IMX_SCU_WAKEUP_OFF; + ret |= mxc_gpio_generic_config(port, i, config); + } + } + + return ret; +} + +static int __maybe_unused mxc_gpio_noirq_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct mxc_gpio_port *port = platform_get_drvdata(pdev); + + if (port->wakeup_pads > 0) + port->is_pad_wakeup = mxc_gpio_set_pad_wakeup(port, true); + + return 0; +} + +static int __maybe_unused mxc_gpio_noirq_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct mxc_gpio_port *port = platform_get_drvdata(pdev); + + if (port->wakeup_pads > 0) + mxc_gpio_set_pad_wakeup(port, false); + port->is_pad_wakeup = false; + + return 0; +} + +static const struct dev_pm_ops mxc_gpio_dev_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mxc_gpio_noirq_suspend, mxc_gpio_noirq_resume) +}; + static int mxc_gpio_syscore_suspend(void) { struct mxc_gpio_port *port; @@ -537,6 +626,7 @@ static struct platform_driver mxc_gpio_driver = { .name = "gpio-mxc", .of_match_table = mxc_gpio_dt_ids, .suppress_bind_attrs = true, + .pm = &mxc_gpio_dev_pm_ops, }, .probe = mxc_gpio_probe, }; |