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pinctrl: xway: fix gpio-hog related boot issues 

This patch is based on commit a86caa9ba5 ("pinctrl: msm: fix gpio-hog
related boot issues").

It fixes the issue that the gpio ranges needs to be defined before
gpiochip_add().

Therefore, we also have to swap the order of registering the pinctrl
driver and registering the gpio chip.

You also have to add the "gpio-ranges" property to the pinctrl device
node to get it finally working.

Signed-off-by: Martin Schiller <ms@dev.tdt.de>
Acked-by: John Crispin <john@phrozen.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Martin Schiller 2018-12-14 08:48:25 +01:00 committed by Linus Walleij
parent 7f07675c11
commit 9b4924da47
1 changed files with 27 additions and 12 deletions
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31
drivers/pinctrl/pinctrl-xway.c
View File

@ -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;
}
/* 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;
}