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gpio: mockup: Allow probing from device tree

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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
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@ -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;