diff options
| -rw-r--r-- | drivers/pinctrl/pinctrl-xway.c | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/drivers/pinctrl/pinctrl-xway.c b/drivers/pinctrl/pinctrl-xway.c index 93f8bd04e7fe..ae74b260b014 100644 --- a/drivers/pinctrl/pinctrl-xway.c +++ b/drivers/pinctrl/pinctrl-xway.c @@ -1746,14 +1746,6 @@ static int pinmux_xway_probe(struct platform_device *pdev) } xway_pctrl_desc.pins = xway_info.pads; - /* register the gpio chip */ - xway_chip.parent = &pdev->dev; - ret = devm_gpiochip_add_data(&pdev->dev, &xway_chip, NULL); - if (ret) { - dev_err(&pdev->dev, "Failed to register gpio chip\n"); - return ret; - } - /* setup the data needed by pinctrl */ xway_pctrl_desc.name = dev_name(&pdev->dev); xway_pctrl_desc.npins = xway_chip.ngpio; @@ -1775,10 +1767,33 @@ static int pinmux_xway_probe(struct platform_device *pdev) return ret; } - /* finish with registering the gpio range in pinctrl */ - xway_gpio_range.npins = xway_chip.ngpio; - xway_gpio_range.base = xway_chip.base; - pinctrl_add_gpio_range(xway_info.pctrl, &xway_gpio_range); + /* register the gpio chip */ + xway_chip.parent = &pdev->dev; + xway_chip.owner = THIS_MODULE; + xway_chip.of_node = pdev->dev.of_node; + ret = devm_gpiochip_add_data(&pdev->dev, &xway_chip, NULL); + if (ret) { + dev_err(&pdev->dev, "Failed to register gpio chip\n"); + return ret; + } + + /* + * For DeviceTree-supported systems, the gpio core checks the + * pinctrl's device node for the "gpio-ranges" property. + * If it is present, it takes care of adding the pin ranges + * for the driver. In this case the driver can skip ahead. + * + * In order to remain compatible with older, existing DeviceTree + * files which don't set the "gpio-ranges" property or systems that + * utilize ACPI the driver has to call gpiochip_add_pin_range(). + */ + if (!of_property_read_bool(pdev->dev.of_node, "gpio-ranges")) { + /* finish with registering the gpio range in pinctrl */ + xway_gpio_range.npins = xway_chip.ngpio; + xway_gpio_range.base = xway_chip.base; + pinctrl_add_gpio_range(xway_info.pctrl, &xway_gpio_range); + } + dev_info(&pdev->dev, "Init done\n"); return 0; } |