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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c095ff93f9
Since commit 9427ecbed4 ("gpio: Rework of_gpiochip_set_names()
to use device property accessors"), gpio chips have to have a
parent, otherwise devprop_gpiochip_set_names() prematurely exists
with message "GPIO chip parent is NULL" and doesn't proceed
'gpio-line-names' DT property.
This patch wraps the CPM GPIO into a platform driver to allow
assignment of the parent device.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <oss@buserror.net>
81 lines
1.6 KiB
C
81 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Common CPM GPIO wrapper for the CPM GPIO ports
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*
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* Author: Christophe Leroy <christophe.leroy@c-s.fr>
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*
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* Copyright 2017 CS Systemes d'Information.
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*
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*/
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <asm/cpm.h>
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#ifdef CONFIG_8xx_GPIO
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#include <asm/cpm1.h>
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#endif
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static int cpm_gpio_probe(struct platform_device *ofdev)
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{
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struct device *dev = &ofdev->dev;
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int (*gp_add)(struct device *dev) = of_device_get_match_data(dev);
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if (!gp_add)
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return -ENODEV;
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return gp_add(dev);
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}
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static const struct of_device_id cpm_gpio_match[] = {
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#ifdef CONFIG_8xx_GPIO
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{
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.compatible = "fsl,cpm1-pario-bank-a",
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.data = cpm1_gpiochip_add16,
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},
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{
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.compatible = "fsl,cpm1-pario-bank-b",
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.data = cpm1_gpiochip_add32,
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},
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{
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.compatible = "fsl,cpm1-pario-bank-c",
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.data = cpm1_gpiochip_add16,
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},
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{
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.compatible = "fsl,cpm1-pario-bank-d",
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.data = cpm1_gpiochip_add16,
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},
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/* Port E uses CPM2 layout */
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{
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.compatible = "fsl,cpm1-pario-bank-e",
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.data = cpm2_gpiochip_add32,
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},
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#endif
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{
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.compatible = "fsl,cpm2-pario-bank",
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.data = cpm2_gpiochip_add32,
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, cpm_gpio_match);
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static struct platform_driver cpm_gpio_driver = {
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.probe = cpm_gpio_probe,
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.driver = {
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.name = "cpm-gpio",
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.owner = THIS_MODULE,
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.of_match_table = cpm_gpio_match,
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},
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};
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static int __init cpm_gpio_init(void)
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{
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return platform_driver_register(&cpm_gpio_driver);
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}
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arch_initcall(cpm_gpio_init);
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MODULE_AUTHOR("Christophe Leroy <christophe.leroy@c-s.fr>");
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MODULE_DESCRIPTION("Driver for CPM GPIO");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:cpm-gpio");
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