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gpio: mockup: Allow probing from device tree 

Allow the mockup driver to be probed via the device tree without any
module parameters, allowing it to be used to configure and test higher
level drivers like the leds-gpio driver and corresponding userspace
before actual hardware is available.

Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
This commit is contained in:
Vincent Whitchurch 2020-10-29 09:17:20 +01:00 committed by Bartosz Golaszewski
parent 11b3de087a
commit 43ddebdd09
1 changed files with 9 additions and 2 deletions
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11
drivers/gpio/gpio-mockup.c
View File

@ -15,6 +15,7 @@
#include <linux/irq.h>
#include <linux/irq_sim.h>
#include <linux/irqdomain.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/property.h>
@ -460,9 +461,16 @@ static int gpio_mockup_probe(struct platform_device *pdev)
return 0;
}
static const struct of_device_id gpio_mockup_of_match[] = {
{ .compatible = "gpio-mockup", },
{},
};
MODULE_DEVICE_TABLE(of, gpio_mockup_of_match);
static struct platform_driver gpio_mockup_driver = {
.driver = {
.name = "gpio-mockup",
.of_match_table = gpio_mockup_of_match,
},
.probe = gpio_mockup_probe,
};
@ -556,8 +564,7 @@ static int __init gpio_mockup_init(void)
{
int i, num_chips, err;
if ((gpio_mockup_num_ranges < 2) ||
(gpio_mockup_num_ranges % 2) ||
if ((gpio_mockup_num_ranges % 2) ||
(gpio_mockup_num_ranges > GPIO_MOCKUP_MAX_RANGES))
return -EINVAL;