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path: root/drivers/pinctrl/pinctrl-xway.c
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Diffstat (limited to 'drivers/pinctrl/pinctrl-xway.c')
-rw-r--r--drivers/pinctrl/pinctrl-xway.c39
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;
}