gpio: remove all usage of gpio_remove retval in driver/gpio

Signed-off-by: abdoulaye berthe <berthe.ab@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

57 files changed, 100 insertions, 242 deletions

diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c
index e4ae29824c32..e3d968f751f1 100644
--- a/drivers/gpio/gpio-74x164.c
+++ b/drivers/gpio/gpio-74x164.c
@@ -167,13 +167,11 @@ exit_destroy:
 static int gen_74x164_remove(struct spi_device *spi)
 {
 	struct gen_74x164_chip *chip = spi_get_drvdata(spi);
-	int ret;
 
-	ret = gpiochip_remove(&chip->gpio_chip);
-	if (!ret)
-		mutex_destroy(&chip->lock);
+	gpiochip_remove(&chip->gpio_chip);
+	mutex_destroy(&chip->lock);
 
-	return ret;
+	return 0;
 }
 
 static const struct of_device_id gen_74x164_dt_ids[] = {
diff --git a/drivers/gpio/gpio-adnp.c b/drivers/gpio/gpio-adnp.c
index b2239d678d01..416b2200d4f1 100644
--- a/drivers/gpio/gpio-adnp.c
+++ b/drivers/gpio/gpio-adnp.c
@@ -585,15 +585,8 @@ static int adnp_i2c_remove(struct i2c_client *client)
 {
 	struct adnp *adnp = i2c_get_clientdata(client);
 	struct device_node *np = client->dev.of_node;
-	int err;
-
-	err = gpiochip_remove(&adnp->gpio);
-	if (err < 0) {
-		dev_err(&client->dev, "%s failed: %d\n", "gpiochip_remove()",
-			err);
-		return err;
-	}
 
+	gpiochip_remove(&adnp->gpio);
 	if (of_find_property(np, "interrupt-controller", NULL))
 		adnp_irq_teardown(adnp);
 
diff --git a/drivers/gpio/gpio-adp5520.c b/drivers/gpio/gpio-adp5520.c
index f1ade8fa3218..b08bd169e568 100644
--- a/drivers/gpio/gpio-adp5520.c
+++ b/drivers/gpio/gpio-adp5520.c
@@ -167,15 +167,9 @@ err:
 static int adp5520_gpio_remove(struct platform_device *pdev)
 {
 	struct adp5520_gpio *dev;
-	int ret;
 
 	dev = platform_get_drvdata(pdev);
-	ret = gpiochip_remove(&dev->gpio_chip);
-	if (ret) {
-		dev_err(&pdev->dev, "%s failed, %d\n",
-				"gpiochip_remove()", ret);
-		return ret;
-	}
+	gpiochip_remove(&dev->gpio_chip);
 
 	return 0;
 }
diff --git a/drivers/gpio/gpio-adp5588.c b/drivers/gpio/gpio-adp5588.c
index ef19bc33f2bd..3beed6ea8c65 100644
--- a/drivers/gpio/gpio-adp5588.c
+++ b/drivers/gpio/gpio-adp5588.c
@@ -470,11 +470,7 @@ static int adp5588_gpio_remove(struct i2c_client *client)
 	if (dev->irq_base)
 		free_irq(dev->client->irq, dev);
 
-	ret = gpiochip_remove(&dev->gpio_chip);
-	if (ret) {
-		dev_err(&client->dev, "gpiochip_remove failed %d\n", ret);
-		return ret;
-	}
+	gpiochip_remove(&dev->gpio_chip);
 
 	kfree(dev);
 	return 0;
diff --git a/drivers/gpio/gpio-amd8111.c b/drivers/gpio/gpio-amd8111.c
index 94e9992f8904..3c09f1a6872a 100644
--- a/drivers/gpio/gpio-amd8111.c
+++ b/drivers/gpio/gpio-amd8111.c
@@ -232,8 +232,7 @@ out:
 
 static void __exit amd_gpio_exit(void)
 {
-	int err = gpiochip_remove(&gp.chip);
-	WARN_ON(err);
+	gpiochip_remove(&gp.chip);
 	ioport_unmap(gp.pm);
 	release_region(gp.pmbase + PMBASE_OFFSET, PMBASE_SIZE);
 }
diff --git a/drivers/gpio/gpio-arizona.c b/drivers/gpio/gpio-arizona.c
index 29bdff558981..fe369f5c7fa6 100644
--- a/drivers/gpio/gpio-arizona.c
+++ b/drivers/gpio/gpio-arizona.c
@@ -149,7 +149,8 @@ static int arizona_gpio_remove(struct platform_device *pdev)
 {
 	struct arizona_gpio *arizona_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&arizona_gpio->gpio_chip);
+	gpiochip_remove(&arizona_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver arizona_gpio_driver = {
diff --git a/drivers/gpio/gpio-cs5535.c b/drivers/gpio/gpio-cs5535.c
index c0a3aeba6f21..92ec58fa9236 100644
--- a/drivers/gpio/gpio-cs5535.c
+++ b/drivers/gpio/gpio-cs5535.c
@@ -358,14 +358,8 @@ done:
 static int cs5535_gpio_remove(struct platform_device *pdev)
 {
 	struct resource *r;
-	int err;
 
-	err = gpiochip_remove(&cs5535_gpio_chip.chip);
-	if (err) {
-		/* uhh? */
-		dev_err(&pdev->dev, "unable to remove gpio_chip?\n");
-		return err;
-	}
+	gpiochip_remove(&cs5535_gpio_chip.chip);
 
 	r = platform_get_resource(pdev, IORESOURCE_IO, 0);
 	release_region(r->start, resource_size(r));
diff --git a/drivers/gpio/gpio-da9052.c b/drivers/gpio/gpio-da9052.c
index 416cdf786b05..c5bccd4dec96 100644
--- a/drivers/gpio/gpio-da9052.c
+++ b/drivers/gpio/gpio-da9052.c
@@ -237,7 +237,8 @@ static int da9052_gpio_remove(struct platform_device *pdev)
 {
 	struct da9052_gpio *gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&gpio->gp);
+	gpiochip_remove(&gpio->gp);
+	return 0;
 }
 
 static struct platform_driver da9052_gpio_driver = {
diff --git a/drivers/gpio/gpio-da9055.c b/drivers/gpio/gpio-da9055.c
index f992997bc301..9167c4331081 100644
--- a/drivers/gpio/gpio-da9055.c
+++ b/drivers/gpio/gpio-da9055.c
@@ -174,7 +174,8 @@ static int da9055_gpio_remove(struct platform_device *pdev)
 {
 	struct da9055_gpio *gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&gpio->gp);
+	gpiochip_remove(&gpio->gp);
+	return 0;
 }
 
 static struct platform_driver da9055_gpio_driver = {
diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index cd3b81435274..d6618a6e2399 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -359,7 +359,7 @@ static void dwapb_gpio_unregister(struct dwapb_gpio *gpio)
 
 	for (m = 0; m < gpio->nr_ports; ++m)
 		if (gpio->ports[m].is_registered)
-			WARN_ON(gpiochip_remove(&gpio->ports[m].bgc.gc));
+			gpiochip_remove(&gpio->ports[m].bgc.gc);
 }
 
 static int dwapb_gpio_probe(struct platform_device *pdev)
diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c
index cde36054c387..fe49ec3cdb7d 100644
--- a/drivers/gpio/gpio-em.c
+++ b/drivers/gpio/gpio-em.c
@@ -409,11 +409,8 @@ err0:
 static int em_gio_remove(struct platform_device *pdev)
 {
 	struct em_gio_priv *p = platform_get_drvdata(pdev);
-	int ret;
 
-	ret = gpiochip_remove(&p->gpio_chip);
-	if (ret)
-		return ret;
+	gpiochip_remove(&p->gpio_chip);
 
 	irq_domain_remove(p->irq_domain);
 	return 0;
diff --git a/drivers/gpio/gpio-f7188x.c b/drivers/gpio/gpio-f7188x.c
index 8f73ee093739..fd3202f968ff 100644
--- a/drivers/gpio/gpio-f7188x.c
+++ b/drivers/gpio/gpio-f7188x.c
@@ -317,13 +317,7 @@ static int f7188x_gpio_probe(struct platform_device *pdev)
 err_gpiochip:
 	for (i = i - 1; i >= 0; i--) {
 		struct f7188x_gpio_bank *bank = &data->bank[i];
-		int tmp;
-
-		tmp = gpiochip_remove(&bank->chip);
-		if (tmp < 0)
-			dev_err(&pdev->dev,
-				"Failed to remove gpiochip %d: %d\n",
-				i, tmp);
+		gpiochip_remove(&bank->chip);
 	}
 
 	return err;
@@ -331,20 +325,12 @@ err_gpiochip:
 
 static int f7188x_gpio_remove(struct platform_device *pdev)
 {
-	int err;
 	int i;
 	struct f7188x_gpio_data *data = platform_get_drvdata(pdev);
 
 	for (i = 0; i < data->nr_bank; i++) {
 		struct f7188x_gpio_bank *bank = &data->bank[i];
-
-		err = gpiochip_remove(&bank->chip);
-		if (err) {
-			dev_err(&pdev->dev,
-				"Failed to remove GPIO gpiochip %d: %d\n",
-				i, err);
-			return err;
-		}
+		gpiochip_remove(&bank->chip);
 	}
 
 	return 0;
diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c
index fea8c82bb8fc..16f6115e5bdb 100644
--- a/drivers/gpio/gpio-generic.c
+++ b/drivers/gpio/gpio-generic.c
@@ -398,7 +398,8 @@ static int bgpio_request(struct gpio_chip *chip, unsigned gpio_pin)
 
 int bgpio_remove(struct bgpio_chip *bgc)
 {
-	return gpiochip_remove(&bgc->gc);
+	gpiochip_remove(&bgc->gc);
+	return 0;
 }
 EXPORT_SYMBOL_GPL(bgpio_remove);
 
diff --git a/drivers/gpio/gpio-grgpio.c b/drivers/gpio/gpio-grgpio.c
index 3c3f515b7916..66ad3df9d9cf 100644
--- a/drivers/gpio/gpio-grgpio.c
+++ b/drivers/gpio/gpio-grgpio.c
@@ -468,9 +468,7 @@ static int grgpio_remove(struct platform_device *ofdev)
 		}
 	}
 
-	ret = gpiochip_remove(&priv->bgc.gc);
-	if (ret)
-		goto out;
+	gpiochip_remove(&priv->bgc.gc);
 
 	if (priv->domain)
 		irq_domain_remove(priv->domain);
diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c
index 70304220a479..3784e81e7762 100644
--- a/drivers/gpio/gpio-ich.c
+++ b/drivers/gpio/gpio-ich.c
@@ -514,14 +514,7 @@ add_err:
 
 static int ichx_gpio_remove(struct platform_device *pdev)
 {
-	int err;
-
-	err = gpiochip_remove(&ichx_priv.chip);
-	if (err) {
-		dev_err(&pdev->dev, "%s failed, %d\n",
-				"gpiochip_remove()", err);
-		return err;
-	}
+	gpiochip_remove(&ichx_priv.chip);
 
 	ichx_gpio_release_regions(ichx_priv.gpio_base, ichx_priv.use_gpio);
 	if (ichx_priv.pm_base)
diff --git a/drivers/gpio/gpio-it8761e.c b/drivers/gpio/gpio-it8761e.c
index 278b81317010..dadfc245cf09 100644
--- a/drivers/gpio/gpio-it8761e.c
+++ b/drivers/gpio/gpio-it8761e.c
@@ -217,11 +217,7 @@ gpiochip_add_err:
 static void __exit it8761e_gpio_exit(void)
 {
 	if (gpio_ba) {
-		int ret = gpiochip_remove(&it8761e_gpio_chip);
-
-		WARN(ret, "%s(): gpiochip_remove() failed, ret=%d\n",
-				__func__, ret);
-
+		gpiochip_remove(&it8761e_gpio_chip);
 		release_region(gpio_ba, GPIO_IOSIZE);
 		gpio_ba = 0;
 	}
diff --git a/drivers/gpio/gpio-janz-ttl.c b/drivers/gpio/gpio-janz-ttl.c
index 42852eaaf020..29ffe22ad97a 100644
--- a/drivers/gpio/gpio-janz-ttl.c
+++ b/drivers/gpio/gpio-janz-ttl.c
@@ -194,14 +194,8 @@ static int ttl_probe(struct platform_device *pdev)
 static int ttl_remove(struct platform_device *pdev)
 {
 	struct ttl_module *mod = platform_get_drvdata(pdev);
-	struct device *dev = &pdev->dev;
-	int ret;
 
-	ret = gpiochip_remove(&mod->gpio);
-	if (ret) {
-		dev_err(dev, "unable to remove GPIO chip\n");
-		return ret;
-	}
+	gpiochip_remove(&mod->gpio);
 
 	return 0;
 }
diff --git a/drivers/gpio/gpio-kempld.c b/drivers/gpio/gpio-kempld.c
index 1e5e51987d31..fd150adeebf9 100644
--- a/drivers/gpio/gpio-kempld.c
+++ b/drivers/gpio/gpio-kempld.c
@@ -199,7 +199,8 @@ static int kempld_gpio_remove(struct platform_device *pdev)
 {
 	struct kempld_gpio_data *gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&gpio->chip);
+	gpiochip_remove(&gpio->chip);
+	return 0;
 }
 
 static struct platform_driver kempld_gpio_driver = {
diff --git a/drivers/gpio/gpio-lp3943.c b/drivers/gpio/gpio-lp3943.c
index a0341c92bcb4..6bbdad805b78 100644
--- a/drivers/gpio/gpio-lp3943.c
+++ b/drivers/gpio/gpio-lp3943.c
@@ -216,7 +216,8 @@ static int lp3943_gpio_remove(struct platform_device *pdev)
 {
 	struct lp3943_gpio *lp3943_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&lp3943_gpio->chip);
+	gpiochip_remove(&lp3943_gpio->chip);
+	return 0;
 }
 
 static const struct of_device_id lp3943_gpio_of_match[] = {
diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c
index 2bea89b72508..7c141dd850a1 100644
--- a/drivers/gpio/gpio-lynxpoint.c
+++ b/drivers/gpio/gpio-lynxpoint.c
@@ -465,11 +465,8 @@ MODULE_DEVICE_TABLE(acpi, lynxpoint_gpio_acpi_match);
 static int lp_gpio_remove(struct platform_device *pdev)
 {
 	struct lp_gpio *lg = platform_get_drvdata(pdev);
-	int err;
 	pm_runtime_disable(&pdev->dev);
-	err = gpiochip_remove(&lg->chip);
-	if (err)
-		dev_warn(&pdev->dev, "failed to remove gpio_chip.\n");
+	gpiochip_remove(&lg->chip);
 	return 0;
 }
 
diff --git a/drivers/gpio/gpio-max730x.c b/drivers/gpio/gpio-max730x.c
index 0814584fcdc1..18ab89e20806 100644
--- a/drivers/gpio/gpio-max730x.c
+++ b/drivers/gpio/gpio-max730x.c
@@ -228,21 +228,16 @@ EXPORT_SYMBOL_GPL(__max730x_probe);
 int __max730x_remove(struct device *dev)
 {
 	struct max7301 *ts = dev_get_drvdata(dev);
-	int ret;
 
 	if (ts == NULL)
 		return -ENODEV;
 
 	/* Power down the chip and disable IRQ output */
 	ts->write(dev, 0x04, 0x00);
-
-	ret = gpiochip_remove(&ts->chip);
-	if (!ret)
-		mutex_destroy(&ts->lock);
-	else
-		dev_err(dev, "Failed to remove GPIO controller: %d\n", ret);
-
-	return ret;
+	gpiochip_remove(&ts->chip);
+	mutex_destroy(&ts->lock);
+	kfree(ts);
+	return 0;
 }
 EXPORT_SYMBOL_GPL(__max730x_remove);
 
diff --git a/drivers/gpio/gpio-max732x.c b/drivers/gpio/gpio-max732x.c
index 7c36f2b0983d..6c676225b886 100644
--- a/drivers/gpio/gpio-max732x.c
+++ b/drivers/gpio/gpio-max732x.c
@@ -676,12 +676,7 @@ static int max732x_remove(struct i2c_client *client)
 		}
 	}
 
-	ret = gpiochip_remove(&chip->gpio_chip);
-	if (ret) {
-		dev_err(&client->dev, "%s failed, %d\n",
-				"gpiochip_remove()", ret);
-		return ret;
-	}
+	gpiochip_remove(&chip->gpio_chip);
 
 	max732x_irq_teardown(chip);
 
diff --git a/drivers/gpio/gpio-mc33880.c b/drivers/gpio/gpio-mc33880.c
index 553a80a5eaf3..4e3e160e5db2 100644
--- a/drivers/gpio/gpio-mc33880.c
+++ b/drivers/gpio/gpio-mc33880.c
@@ -149,20 +149,15 @@ exit_destroy:
 static int mc33880_remove(struct spi_device *spi)
 {
 	struct mc33880 *mc;
-	int ret;
 
 	mc = spi_get_drvdata(spi);
 	if (mc == NULL)
 		return -ENODEV;
 
-	ret = gpiochip_remove(&mc->chip);
-	if (!ret)
-		mutex_destroy(&mc->lock);
-	else
-		dev_err(&spi->dev, "Failed to remove the GPIO controller: %d\n",
-			ret);
+	gpiochip_remove(&mc->chip);
+	mutex_destroy(&mc->lock);
 
-	return ret;
+	return 0;
 }
 
 static struct spi_driver mc33880_driver = {
diff --git a/drivers/gpio/gpio-mc9s08dz60.c b/drivers/gpio/gpio-mc9s08dz60.c
index dce35ff00db7..d62b4f8182bf 100644
--- a/drivers/gpio/gpio-mc9s08dz60.c
+++ b/drivers/gpio/gpio-mc9s08dz60.c
@@ -118,7 +118,8 @@ static int mc9s08dz60_remove(struct i2c_client *client)
 
 	mc9s = i2c_get_clientdata(client);
 
-	return gpiochip_remove(&mc9s->chip);
+	gpiochip_remove(&mc9s->chip);
+	return 0;
 }
 
 static const struct i2c_device_id mc9s08dz60_id[] = {
diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c
index fe7c0e211f9a..4fe07864fa03 100644
--- a/drivers/gpio/gpio-mcp23s08.c
+++ b/drivers/gpio/gpio-mcp23s08.c
@@ -812,16 +812,14 @@ fail:
 static int mcp230xx_remove(struct i2c_client *client)
 {
 	struct mcp23s08 *mcp = i2c_get_clientdata(client);
-	int status;
 
 	if (client->irq && mcp->irq_controller)
 		mcp23s08_irq_teardown(mcp);
 
-	status = gpiochip_remove(&mcp->chip);
-	if (status == 0)
-		kfree(mcp);
+	gpiochip_remove(&mcp->chip);
+	kfree(mcp);
 
-	return status;
+	return 0;
 }
 
 static const struct i2c_device_id mcp230xx_id[] = {
@@ -966,13 +964,10 @@ static int mcp23s08_probe(struct spi_device *spi)
 
 fail:
 	for (addr = 0; addr < ARRAY_SIZE(data->mcp); addr++) {
-		int tmp;
 
 		if (!data->mcp[addr])
 			continue;
-		tmp = gpiochip_remove(&data->mcp[addr]->chip);
-		if (tmp < 0)
-			dev_err(&spi->dev, "%s --> %d\n", "remove", tmp);
+		gpiochip_remove(&data->mcp[addr]->chip);
 	}
 	kfree(data);
 	return status;
@@ -982,23 +977,16 @@ static int mcp23s08_remove(struct spi_device *spi)
 {
 	struct mcp23s08_driver_data	*data = spi_get_drvdata(spi);
 	unsigned			addr;
-	int				status = 0;
 
 	for (addr = 0; addr < ARRAY_SIZE(data->mcp); addr++) {
-		int tmp;
 
 		if (!data->mcp[addr])
 			continue;
 
-		tmp = gpiochip_remove(&data->mcp[addr]->chip);
-		if (tmp < 0) {
-			dev_err(&spi->dev, "%s --> %d\n", "remove", tmp);
-			status = tmp;
-		}
+		gpiochip_remove(&data->mcp[addr]->chip);
 	}
-	if (status == 0)
-		kfree(data);
-	return status;
+	kfree(data);
+	return 0;
 }
 
 static const struct spi_device_id mcp23s08_ids[] = {
diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c
index d51329d23d38..5536108aa9db 100644
--- a/drivers/gpio/gpio-ml-ioh.c
+++ b/drivers/gpio/gpio-ml-ioh.c
@@ -497,8 +497,7 @@ err_irq_alloc_descs:
 err_gpiochip_add:
 	while (--i >= 0) {
 		chip--;
-		if (gpiochip_remove(&chip->gpio))
-			dev_err(&pdev->dev, "Failed gpiochip_remove(%d)\n", i);
+		gpiochip_remove(&chip->gpio);
 	}
 	kfree(chip_save);
 
@@ -519,7 +518,6 @@ err_pci_enable:
 
 static void ioh_gpio_remove(struct pci_dev *pdev)
 {
-	int err;
 	int i;
 	struct ioh_gpio *chip = pci_get_drvdata(pdev);
 	void *chip_save;
@@ -530,9 +528,7 @@ static void ioh_gpio_remove(struct pci_dev *pdev)
 
 	for (i = 0; i < 8; i++, chip++) {
 		irq_free_descs(chip->irq_base, num_ports[i]);
-		err = gpiochip_remove(&chip->gpio);
-		if (err)
-			dev_err(&pdev->dev, "Failed gpiochip_remove\n");
+		gpiochip_remove(&chip->gpio);
 	}
 
 	chip = chip_save;
diff --git a/drivers/gpio/gpio-msm-v2.c b/drivers/gpio/gpio-msm-v2.c
index a3351acd4963..94f57670df9a 100644
--- a/drivers/gpio/gpio-msm-v2.c
+++ b/drivers/gpio/gpio-msm-v2.c
@@ -438,10 +438,7 @@ MODULE_DEVICE_TABLE(of, msm_gpio_of_match);
 
 static int msm_gpio_remove(struct platform_device *dev)
 {
-	int ret = gpiochip_remove(&msm_gpio.gpio_chip);
-
-	if (ret < 0)
-		return ret;
+	gpiochip_remove(&msm_gpio.gpio_chip);
 
 	irq_set_handler(msm_gpio.summary_irq, NULL);
 
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
index db83b3c0a449..f4e54a92e04a 100644
--- a/drivers/gpio/gpio-mxc.c
+++ b/drivers/gpio/gpio-mxc.c
@@ -485,7 +485,7 @@ static int mxc_gpio_probe(struct platform_device *pdev)
 out_irqdesc_free:
 	irq_free_descs(irq_base, 32);
 out_gpiochip_remove:
-	WARN_ON(gpiochip_remove(&port->bgc.gc) < 0);
+	gpiochip_remove(&port->bgc.gc);
 out_bgpio_remove:
 	bgpio_remove(&port->bgc);
 out_bgio:
diff --git a/drivers/gpio/gpio-octeon.c b/drivers/gpio/gpio-octeon.c
index dbb08546b9ec..5c5770c99c80 100644
--- a/drivers/gpio/gpio-octeon.c
+++ b/drivers/gpio/gpio-octeon.c
@@ -129,7 +129,8 @@ out:
 static int octeon_gpio_remove(struct platform_device *pdev)
 {
 	struct gpio_chip *chip = pdev->dev.platform_data;
-	return gpiochip_remove(chip);
+	gpiochip_remove(chip);
+	return 0;
 }
 
 static struct of_device_id octeon_gpio_match[] = {
diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c
index 86bdbe362068..171a6389f9ce 100644
--- a/drivers/gpio/gpio-palmas.c
+++ b/drivers/gpio/gpio-palmas.c
@@ -210,7 +210,8 @@ static int palmas_gpio_remove(struct platform_device *pdev)
 {
 	struct palmas_gpio *palmas_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&palmas_gpio->gpio_chip);
+	gpiochip_remove(&palmas_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver palmas_gpio_driver = {
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index e721a37c3473..f9961eea2120 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -765,12 +765,7 @@ static int pca953x_remove(struct i2c_client *client)
 		}
 	}
 
-	ret = gpiochip_remove(&chip->gpio_chip);
-	if (ret) {
-		dev_err(&client->dev, "%s failed, %d\n",
-				"gpiochip_remove()", ret);
-		return ret;
-	}
+	gpiochip_remove(&chip->gpio_chip);
 
 	return 0;
 }
diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
index 27b46751ea7e..236708ad0a5b 100644
--- a/drivers/gpio/gpio-pcf857x.c
+++ b/drivers/gpio/gpio-pcf857x.c
@@ -444,9 +444,7 @@ static int pcf857x_remove(struct i2c_client *client)
 	if (client->irq)
 		pcf857x_irq_domain_cleanup(gpio);
 
-	status = gpiochip_remove(&gpio->chip);
-	if (status)
-		dev_err(&client->dev, "%s --> %d\n", "remove", status);
+	gpiochip_remove(&gpio->chip);
 	return status;
 }
 
diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c
index d6eac9b17db9..e0ac549dccb5 100644
--- a/drivers/gpio/gpio-pch.c
+++ b/drivers/gpio/gpio-pch.c
@@ -426,9 +426,7 @@ end:
 
 err_request_irq:
 	irq_free_descs(irq_base, gpio_pins[chip->ioh]);
-
-	if (gpiochip_remove(&chip->gpio))
-		dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__);
+	gpiochip_remove(&chip->gpio);
 
 err_gpiochip_add:
 	pci_iounmap(pdev, chip->base);
@@ -447,7 +445,6 @@ err_pci_enable:
 
 static void pch_gpio_remove(struct pci_dev *pdev)
 {
-	int err;
 	struct pch_gpio *chip = pci_get_drvdata(pdev);
 
 	if (chip->irq_base != -1) {
@@ -456,10 +453,7 @@ static void pch_gpio_remove(struct pci_dev *pdev)
 		irq_free_descs(chip->irq_base, gpio_pins[chip->ioh]);
 	}
 
-	err = gpiochip_remove(&chip->gpio);
-	if (err)
-		dev_err(&pdev->dev, "Failed gpiochip_remove\n");
-
+	gpiochip_remove(&chip->gpio);
 	pci_iounmap(pdev, chip->base);
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);
diff --git a/drivers/gpio/gpio-rc5t583.c b/drivers/gpio/gpio-rc5t583.c
index 562b0c4d9cc8..769233d2da6d 100644
--- a/drivers/gpio/gpio-rc5t583.c
+++ b/drivers/gpio/gpio-rc5t583.c
@@ -148,7 +148,8 @@ static int rc5t583_gpio_remove(struct platform_device *pdev)
 {
 	struct rc5t583_gpio *rc5t583_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&rc5t583_gpio->gpio_chip);
+	gpiochip_remove(&rc5t583_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver rc5t583_gpio_driver = {
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index 7c621211e17b..c96e2afdad78 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -471,11 +471,8 @@ err0:
 static int gpio_rcar_remove(struct platform_device *pdev)
 {
 	struct gpio_rcar_priv *p = platform_get_drvdata(pdev);
-	int ret;
 
-	ret = gpiochip_remove(&p->gpio_chip);
-	if (ret)
-		return ret;
+	gpiochip_remove(&p->gpio_chip);
 
 	irq_domain_remove(p->irq_domain);
 	pm_runtime_put(&pdev->dev);
diff --git a/drivers/gpio/gpio-rdc321x.c b/drivers/gpio/gpio-rdc321x.c
index 9fa7e53331c9..d729bc8a554d 100644
--- a/drivers/gpio/gpio-rdc321x.c
+++ b/drivers/gpio/gpio-rdc321x.c
@@ -199,14 +199,11 @@ static int rdc321x_gpio_probe(struct platform_device *pdev)
 
 static int rdc321x_gpio_remove(struct platform_device *pdev)
 {
-	int ret;
 	struct rdc321x_gpio *rdc321x_gpio_dev = platform_get_drvdata(pdev);
 
-	ret = gpiochip_remove(&rdc321x_gpio_dev->chip);
-	if (ret)
-		dev_err(&pdev->dev, "failed to unregister chip\n");
+	gpiochip_remove(&rdc321x_gpio_dev->chip);
 
-	return ret;
+	return 0;
 }
 
 static struct platform_driver rdc321x_gpio_driver = {
diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c
index a9b1cd16c848..41e91d70301e 100644
--- a/drivers/gpio/gpio-sch.c
+++ b/drivers/gpio/gpio-sch.c
@@ -290,8 +290,7 @@ static int sch_gpio_probe(struct platform_device *pdev)
 	return 0;
 
 err_sch_gpio_resume:
-	if (gpiochip_remove(&sch_gpio_core))
-		dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__);
+	gpiochip_remove(&sch_gpio_core);
 
 err_sch_gpio_core:
 	release_region(res->start, resource_size(res));
@@ -304,23 +303,14 @@ static int sch_gpio_remove(struct platform_device *pdev)
 {
 	struct resource *res;
 	if (gpio_ba) {
-		int err;
 
-		err  = gpiochip_remove(&sch_gpio_core);
-		if (err)
-			dev_err(&pdev->dev, "%s failed, %d\n",
-				"gpiochip_remove()", err);
-		err = gpiochip_remove(&sch_gpio_resume);
-		if (err)
-			dev_err(&pdev->dev, "%s failed, %d\n",
-				"gpiochip_remove()", err);
+		gpiochip_remove(&sch_gpio_core);
+		gpiochip_remove(&sch_gpio_resume);
 
 		res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 
 		release_region(res->start, resource_size(res));
 		gpio_ba = 0;
-
-		return err;
 	}
 
 	return 0;
diff --git a/drivers/gpio/gpio-sch311x.c b/drivers/gpio/gpio-sch311x.c
index f942b80ee403..0cb11413e814 100644
--- a/drivers/gpio/gpio-sch311x.c
+++ b/drivers/gpio/gpio-sch311x.c
@@ -291,14 +291,12 @@ static int sch311x_gpio_remove(struct platform_device *pdev)
 {
 	struct sch311x_pdev_data *pdata = pdev->dev.platform_data;
 	struct sch311x_gpio_priv *priv = platform_get_drvdata(pdev);
-	int err, i;
+	int i;
 
 	release_region(pdata->runtime_reg + GP1, 6);
 
 	for (i = 0; i < ARRAY_SIZE(priv->blocks); i++) {
-		err = gpiochip_remove(&priv->blocks[i].chip);
-		if (err)
-			return err;
+		gpiochip_remove(&priv->blocks[i].chip);
 		dev_info(&pdev->dev,
 			 "SMSC SCH311x GPIO block %d unregistered.\n", i);
 	}
diff --git a/drivers/gpio/gpio-sodaville.c b/drivers/gpio/gpio-sodaville.c
index 7c6c518929bc..d8da36cd8123 100644
--- a/drivers/gpio/gpio-sodaville.c
+++ b/drivers/gpio/gpio-sodaville.c
@@ -265,9 +265,7 @@ static void sdv_gpio_remove(struct pci_dev *pdev)
 	free_irq(pdev->irq, sd);
 	irq_free_descs(sd->irq_base, SDV_NUM_PUB_GPIOS);
 
-	if (gpiochip_remove(&sd->bgpio.gc))
-		dev_err(&pdev->dev, "gpiochip_remove() failed.\n");
-
+	gpiochip_remove(&sd->bgpio.gc);
 	pci_release_region(pdev, GPIO_BAR);
 	iounmap(sd->gpio_pub_base);
 	pci_disable_device(pdev);
diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
index ed90adbdb128..845025a57240 100644
--- a/drivers/gpio/gpio-stmpe.c
+++ b/drivers/gpio/gpio-stmpe.c
@@ -353,17 +353,11 @@ static int stmpe_gpio_remove(struct platform_device *pdev)
 	struct stmpe_gpio *stmpe_gpio = platform_get_drvdata(pdev);
 	struct stmpe *stmpe = stmpe_gpio->stmpe;
 	struct stmpe_gpio_platform_data *pdata = stmpe->pdata->gpio;
-	int ret;
 
 	if (pdata && pdata->remove)
 		pdata->remove(stmpe, stmpe_gpio->chip.base);
 
-	ret = gpiochip_remove(&stmpe_gpio->chip);
-	if (ret < 0) {
-		dev_err(stmpe_gpio->dev,
-			"unable to remove gpiochip: %d\n", ret);
-		return ret;
-	}
+	gpiochip_remove(&stmpe_gpio->chip);
 
 	stmpe_disable(stmpe, STMPE_BLOCK_GPIO);
 
diff --git a/drivers/gpio/gpio-sx150x.c b/drivers/gpio/gpio-sx150x.c
index b51ca9f5c140..bce6c6108f20 100644
--- a/drivers/gpio/gpio-sx150x.c
+++ b/drivers/gpio/gpio-sx150x.c
@@ -615,19 +615,16 @@ static int sx150x_probe(struct i2c_client *client,
 
 	return 0;
 probe_fail_post_gpiochip_add:
-	WARN_ON(gpiochip_remove(&chip->gpio_chip) < 0);
+	gpiochip_remove(&chip->gpio_chip);
 	return rc;
 }
 
 static int sx150x_remove(struct i2c_client *client)
 {
 	struct sx150x_chip *chip;
-	int rc;
 
 	chip = i2c_get_clientdata(client);
-	rc = gpiochip_remove(&chip->gpio_chip);
-	if (rc < 0)
-		return rc;
+	gpiochip_remove(&chip->gpio_chip);
 
 	if (chip->irq_summary >= 0)
 		sx150x_remove_irq_chip(chip);
diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c
index b50fe1297748..30884fbc750d 100644
--- a/drivers/gpio/gpio-syscon.c
+++ b/drivers/gpio/gpio-syscon.c
@@ -172,7 +172,8 @@ static int syscon_gpio_remove(struct platform_device *pdev)
 {
 	struct syscon_gpio_priv *priv = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&priv->chip);
+	gpiochip_remove(&priv->chip);
+	return 0;
 }
 
 static struct platform_driver syscon_gpio_driver = {
diff --git a/drivers/gpio/gpio-tb10x.c b/drivers/gpio/gpio-tb10x.c
index 07bce97647a6..9e615be8032c 100644
--- a/drivers/gpio/gpio-tb10x.c
+++ b/drivers/gpio/gpio-tb10x.c
@@ -291,7 +291,6 @@ fail_ioremap:
 static int __exit tb10x_gpio_remove(struct platform_device *pdev)
 {
 	struct tb10x_gpio *tb10x_gpio = platform_get_drvdata(pdev);
-	int ret;
 
 	if (tb10x_gpio->gc.to_irq) {
 		irq_remove_generic_chip(tb10x_gpio->domain->gc->gc[0],
@@ -300,9 +299,7 @@ static int __exit tb10x_gpio_remove(struct platform_device *pdev)
 		irq_domain_remove(tb10x_gpio->domain);
 		free_irq(tb10x_gpio->irq, tb10x_gpio);
 	}
-	ret = gpiochip_remove(&tb10x_gpio->gc);
-	if (ret)
-		return ret;
+	gpiochip_remove(&tb10x_gpio->gc);
 
 	return 0;
 }
diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c
index 51f7cbd9ff71..7324869c38e0 100644
--- a/drivers/gpio/gpio-tc3589x.c
+++ b/drivers/gpio/gpio-tc3589x.c
@@ -313,17 +313,11 @@ static int tc3589x_gpio_remove(struct platform_device *pdev)
 	struct tc3589x_gpio *tc3589x_gpio = platform_get_drvdata(pdev);
 	struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
 	struct tc3589x_gpio_platform_data *pdata = tc3589x->pdata->gpio;
-	int ret;
 
 	if (pdata && pdata->remove)
 		pdata->remove(tc3589x, tc3589x_gpio->chip.base);
 
-	ret = gpiochip_remove(&tc3589x_gpio->chip);
-	if (ret < 0) {
-		dev_err(tc3589x_gpio->dev,
-			"unable to remove gpiochip: %d\n", ret);
-		return ret;
-	}
+	gpiochip_remove(&tc3589x_gpio->chip);
 
 	return 0;
 }
diff --git a/drivers/gpio/gpio-timberdale.c b/drivers/gpio/gpio-timberdale.c
index efc7c129016d..a685a3cbbc81 100644
--- a/drivers/gpio/gpio-timberdale.c
+++ b/drivers/gpio/gpio-timberdale.c
@@ -307,7 +307,6 @@ static int timbgpio_probe(struct platform_device *pdev)
 
 static int timbgpio_remove(struct platform_device *pdev)
 {
-	int err;
 	struct timbgpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct timbgpio *tgpio = platform_get_drvdata(pdev);
 	int irq = platform_get_irq(pdev, 0);
@@ -323,9 +322,7 @@ static int timbgpio_remove(struct platform_device *pdev)
 		irq_set_handler_data(irq, NULL);
 	}
 
-	err = gpiochip_remove(&tgpio->gpio);
-	if (err)
-		printk(KERN_ERR DRIVER_NAME": failed to remove gpio_chip\n");
+	gpiochip_remove(&tgpio->gpio);
 
 	return 0;
 }
diff --git a/drivers/gpio/gpio-tps6586x.c b/drivers/gpio/gpio-tps6586x.c
index a69fbea41253..9c9238e838a9 100644
--- a/drivers/gpio/gpio-tps6586x.c
+++ b/drivers/gpio/gpio-tps6586x.c
@@ -137,7 +137,8 @@ static int tps6586x_gpio_remove(struct platform_device *pdev)
 {
 	struct tps6586x_gpio *tps6586x_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&tps6586x_gpio->gpio_chip);
+	gpiochip_remove(&tps6586x_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver tps6586x_gpio_driver = {
diff --git a/drivers/gpio/gpio-tps65910.c b/drivers/gpio/gpio-tps65910.c
index e2f8cda235ea..88f1f5ff4e96 100644
--- a/drivers/gpio/gpio-tps65910.c
+++ b/drivers/gpio/gpio-tps65910.c
@@ -190,7 +190,8 @@ static int tps65910_gpio_remove(struct platform_device *pdev)
 {
 	struct tps65910_gpio *tps65910_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&tps65910_gpio->gpio_chip);
+	gpiochip_remove(&tps65910_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver tps65910_gpio_driver = {
diff --git a/drivers/gpio/gpio-tps65912.c b/drivers/gpio/gpio-tps65912.c
index 59ee486cb8b9..22052d84c63b 100644
--- a/drivers/gpio/gpio-tps65912.c
+++ b/drivers/gpio/gpio-tps65912.c
@@ -117,7 +117,8 @@ static int tps65912_gpio_remove(struct platform_device *pdev)
 {
 	struct tps65912_gpio_data  *tps65912_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&tps65912_gpio->gpio_chip);
+	gpiochip_remove(&tps65912_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver tps65912_gpio_driver = {
diff --git a/drivers/gpio/gpio-ts5500.c b/drivers/gpio/gpio-ts5500.c
index 3df3ebdb3e52..de18591ff11e 100644
--- a/drivers/gpio/gpio-ts5500.c
+++ b/drivers/gpio/gpio-ts5500.c
@@ -427,8 +427,7 @@ static int ts5500_dio_probe(struct platform_device *pdev)
 
 	return 0;
 cleanup:
-	if (gpiochip_remove(&priv->gpio_chip))
-		dev_err(dev, "failed to remove gpio chip\n");
+	gpiochip_remove(&priv->gpio_chip);
 	return ret;
 }
 
@@ -437,7 +436,8 @@ static int ts5500_dio_remove(struct platform_device *pdev)
 	struct ts5500_priv *priv = platform_get_drvdata(pdev);
 
 	ts5500_disable_irq(priv);
-	return gpiochip_remove(&priv->gpio_chip);
+	gpiochip_remove(&priv->gpio_chip);
+	return 0;
 }
 
 static struct platform_device_id ts5500_dio_ids[] = {
diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c
index 826da37052d7..118828b3736f 100644
--- a/drivers/gpio/gpio-twl4030.c
+++ b/drivers/gpio/gpio-twl4030.c
@@ -583,9 +583,7 @@ static int gpio_twl4030_remove(struct platform_device *pdev)
 		}
 	}
 
-	status = gpiochip_remove(&priv->gpio_chip);
-	if (status < 0)
-		return status;
+	gpiochip_remove(&priv->gpio_chip);
 
 	if (is_module())
 		return 0;
diff --git a/drivers/gpio/gpio-twl6040.c b/drivers/gpio/gpio-twl6040.c
index 0caf5cd1b47d..f28e04b88aa9 100644
--- a/drivers/gpio/gpio-twl6040.c
+++ b/drivers/gpio/gpio-twl6040.c
@@ -111,7 +111,8 @@ static int gpo_twl6040_probe(struct platform_device *pdev)
 
 static int gpo_twl6040_remove(struct platform_device *pdev)
 {
-	return gpiochip_remove(&twl6040gpo_chip);
+	gpiochip_remove(&twl6040gpo_chip);
+	return 0;
 }
 
 /* Note:  this hardware lives inside an I2C-based multi-function device. */
diff --git a/drivers/gpio/gpio-ucb1400.c b/drivers/gpio/gpio-ucb1400.c
index d520dc9ed709..d502825159b9 100644
--- a/drivers/gpio/gpio-ucb1400.c
+++ b/drivers/gpio/gpio-ucb1400.c
@@ -89,7 +89,7 @@ static int ucb1400_gpio_remove(struct platform_device *dev)
 			return err;
 	}
 
-	err = gpiochip_remove(&ucb->gc);
+	gpiochip_remove(&ucb->gc);
 	return err;
 }
 
diff --git a/drivers/gpio/gpio-viperboard.c b/drivers/gpio/gpio-viperboard.c
index 79e3b5836712..e2a11f27807f 100644
--- a/drivers/gpio/gpio-viperboard.c
+++ b/drivers/gpio/gpio-viperboard.c
@@ -446,8 +446,7 @@ static int vprbrd_gpio_probe(struct platform_device *pdev)
 	return ret;
 
 err_gpiob:
-	if (gpiochip_remove(&vb_gpio->gpioa))
-		dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__);
+	gpiochip_remove(&vb_gpio->gpioa);
 
 err_gpioa:
 	return ret;
@@ -456,13 +455,10 @@ err_gpioa:
 static int vprbrd_gpio_remove(struct platform_device *pdev)
 {
 	struct vprbrd_gpio *vb_gpio = platform_get_drvdata(pdev);
-	int ret;
 
-	ret = gpiochip_remove(&vb_gpio->gpiob);
-	if (ret == 0)
-		ret = gpiochip_remove(&vb_gpio->gpioa);
+	gpiochip_remove(&vb_gpio->gpiob);
 
-	return ret;
+	return 0;
 }
 
 static struct platform_driver vprbrd_gpio_driver = {
diff --git a/drivers/gpio/gpio-vx855.c b/drivers/gpio/gpio-vx855.c
index 0fd23b6a753d..85971d4e23c1 100644
--- a/drivers/gpio/gpio-vx855.c
+++ b/drivers/gpio/gpio-vx855.c
@@ -288,8 +288,7 @@ static int vx855gpio_remove(struct platform_device *pdev)
 	struct vx855_gpio *vg = platform_get_drvdata(pdev);
 	struct resource *res;
 
-	if (gpiochip_remove(&vg->gpio))
-		dev_err(&pdev->dev, "unable to remove gpio_chip?\n");
+	gpiochip_remove(&vg->gpio);
 
 	if (vg->gpi_reserved) {
 		res = platform_get_resource(pdev, IORESOURCE_IO, 0);
diff --git a/drivers/gpio/gpio-wm831x.c b/drivers/gpio/gpio-wm831x.c
index b18a1a26425e..58ce75c188b7 100644
--- a/drivers/gpio/gpio-wm831x.c
+++ b/drivers/gpio/gpio-wm831x.c
@@ -279,7 +279,8 @@ static int wm831x_gpio_remove(struct platform_device *pdev)
 {
 	struct wm831x_gpio *wm831x_gpio = platform_get_drvdata(pdev);
 
-	return  gpiochip_remove(&wm831x_gpio->gpio_chip);
+	gpiochip_remove(&wm831x_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver wm831x_gpio_driver = {
diff --git a/drivers/gpio/gpio-wm8350.c b/drivers/gpio/gpio-wm8350.c
index 2487f9d575d3..060b89303bb6 100644
--- a/drivers/gpio/gpio-wm8350.c
+++ b/drivers/gpio/gpio-wm8350.c
@@ -145,7 +145,8 @@ static int wm8350_gpio_remove(struct platform_device *pdev)
 {
 	struct wm8350_gpio_data *wm8350_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&wm8350_gpio->gpio_chip);
+	gpiochip_remove(&wm8350_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver wm8350_gpio_driver = {
diff --git a/drivers/gpio/gpio-wm8994.c b/drivers/gpio/gpio-wm8994.c
index d93b6b581677..6f5e42db4b9e 100644
--- a/drivers/gpio/gpio-wm8994.c
+++ b/drivers/gpio/gpio-wm8994.c
@@ -285,7 +285,8 @@ static int wm8994_gpio_remove(struct platform_device *pdev)
 {
 	struct wm8994_gpio *wm8994_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&wm8994_gpio->gpio_chip);
+	gpiochip_remove(&wm8994_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver wm8994_gpio_driver = {