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gpio: Pass a flag to gpiochip_request_own_desc()

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Before things go out of hand, make it possible to pass
flags when requesting "own" descriptors from a gpio_chip.
This is necessary if the chip wants to request a GPIO with
active low semantics, for example.

Cc: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Roger Quadros <rogerq@ti.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij
2018-09-04 13:31:45 +02:00
parent 67566ae474
commit 21abf10381
9 changed files with 34 additions and 19 deletions
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13
drivers/gpio/gpiolib-acpi.c
View File

@@ -167,7 +167,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
if (!handler)
return AE_OK;
desc = gpiochip_request_own_desc(chip, pin, "ACPI:Event");
desc = gpiochip_request_own_desc(chip, pin, "ACPI:Event", 0);
if (IS_ERR(desc)) {
dev_err(chip->parent, "Failed to request GPIO\n");
return AE_ERROR;
@@ -884,21 +884,14 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
const char *label = "ACPI:OpRegion";
int err;
desc = gpiochip_request_own_desc(chip, pin, label);
desc = gpiochip_request_own_desc(chip, pin, label,
flags);
if (IS_ERR(desc)) {
status = AE_ERROR;
mutex_unlock(&achip->conn_lock);
goto out;
}
err = gpiod_configure_flags(desc, label, 0, flags);
if (err < 0) {
status = AE_NOT_CONFIGURED;
gpiochip_free_own_desc(desc);
mutex_unlock(&achip->conn_lock);
goto out;
}
conn = kzalloc(sizeof(*conn), GFP_KERNEL);
if (!conn) {
status = AE_NO_MEMORY;