linux-kernel - [PATCH v2 1/7] gpio-amdpt: ACPI: Use the ACPI

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Message-ID: <4711815.31r3eYUQgx@kreacher>
Date:   Wed, 13 Oct 2021 18:06:40 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux ACPI <linux-acpi@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>, linux-gpio@...r.kernel.org
Subject: [PATCH v2 1/7] gpio-amdpt: ACPI: Use the ACPI_COMPANION() macro directly

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

The ACPI_HANDLE() macro is a wrapper arond the ACPI_COMPANION()
macro and the ACPI handle produced by the former comes from the
ACPI device object produced by the latter, so it is way more
straightforward to evaluate the latter directly instead of passing
the handle produced by the former to acpi_bus_get_device().

Modify pt_gpio_probe() accordingly (no intentional functional impact).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Acked-by: Bartosz Golaszewski <brgl@...ev.pl>
---

v1 -> v2:
   * Resend with a different From and S-o-b address and with ACK from Bart.
     No other changes.

---
 drivers/gpio/gpio-amdpt.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

Index: linux-pm/drivers/gpio/gpio-amdpt.c
===================================================================
--- linux-pm.orig/drivers/gpio/gpio-amdpt.c
+++ linux-pm/drivers/gpio/gpio-amdpt.c
@@ -72,12 +72,10 @@ static void pt_gpio_free(struct gpio_chi
 static int pt_gpio_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct acpi_device *acpi_dev;
-	acpi_handle handle = ACPI_HANDLE(dev);
 	struct pt_gpio_chip *pt_gpio;
 	int ret = 0;
 
-	if (acpi_bus_get_device(handle, &acpi_dev)) {
+	if (!ACPI_COMPANION(dev)) {
 		dev_err(dev, "PT GPIO device node not found\n");
 		return -ENODEV;
 	}