platform/x86: barco-p50-gpio: normalize return value of gpio_get

[ Upstream commit 1c9d30d ]

The GPIO get callback is expected to return 0 or 1 (or a negative error
code). Ensure that the value returned by p50_gpio_get() is normalized
to the [0, 1] range.

Fixes: 86ef402 ("gpiolib: sanitize the return value of gpio_chip::get()")
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260318-barco-p50-gpio-set-v2-1-c0a4a6416163@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: dtor

drivers/platform/x86/barco-p50-gpio.c

@@ -275,8 +275,11 @@ static int p50_gpio_get(struct gpio_chip *gc, unsigned int offset)
 	mutex_lock(&p50->lock);
 
 	ret = p50_send_mbox_cmd(p50, P50_MBOX_CMD_READ_GPIO, gpio_params[offset], 0);
-	if (ret == 0)
+	if (ret == 0) {
 		ret = p50_read_mbox_reg(p50, P50_MBOX_REG_DATA);
+		if (ret >= 0)
+			ret = !!ret;
+	}
 
 	mutex_unlock(&p50->lock);