Messages in this thread Patch in this message | | | From | Vincent Whitchurch <> | Subject | [PATCH v2] gpio: mockup: Allow probing from device tree | Date | Tue, 27 Oct 2020 14:53:25 +0100 |
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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> --- v2: Remove most of the added code, since the latest driver doesn't need it. Drop DT binding document, since Rob Herring was OK with not documenting this: https://lore.kernel.org/linux-devicetree/5baa1ae6.1c69fb81.847f2.3ab1@mx.google.com/
drivers/gpio/gpio-mockup.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c index 67ed4f238d43..c93892a6936a 100644 --- a/drivers/gpio/gpio-mockup.c +++ b/drivers/gpio/gpio-mockup.c @@ -13,6 +13,7 @@ #include <linux/gpio/driver.h> #include <linux/interrupt.h> #include <linux/irq.h> +#include <linux/of.h> #include <linux/irq_sim.h> #include <linux/irqdomain.h> #include <linux/module.h> @@ -460,9 +461,18 @@ static int gpio_mockup_probe(struct platform_device *pdev) return 0; } +#ifdef CONFIG_OF +static const struct of_device_id gpio_mockup_of_match[] = { + { .compatible = "gpio-mockup", }, + {}, +}; +MODULE_DEVICE_TABLE(of, gpio_mockup_of_match); +#endif + static struct platform_driver gpio_mockup_driver = { .driver = { .name = "gpio-mockup", + .of_match_table = of_match_ptr(gpio_mockup_of_match), }, .probe = gpio_mockup_probe, }; @@ -556,8 +566,7 @@ 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; -- 2.28.0
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