[PATCH v6 0/2] greybus: gpio: Switch to the gpio descriptor interface

[PATCH v6 0/2] greybus: gpio: Switch to the gpio descriptor interface

[Nishad Kamdar]

This patch series converts uses of the old GPIO API to the GPIO
descriptor API. It also converts the GPIO driver to use the
GPIO irqchip library GPIOLIB_IRQCHIP instead of repimplementing
the same.

Changes in v6:
 - Patchset now contains two patches as the patch
   1 has been accepted.
 - Changes mentioned in individual patches of the set.
Changes in v5:
 - Drop the patch which uses gpiochip_get_data() in place of
   gpio_chip_to_gb_gpio_controller() as of now.
 - This is because it currently breaks the driver, since
   gpiochip_add() sets the data pointer to NULL.  
Changes in v4:
 - Changes mentioned in individual patches of the set.
Changes in v3:
 - Combines the latest versions of the three greybus patches together
   in a patch series.

Nishad Kamdar (2):
  staging: greybus: arche-apb-ctrl.c: Switch to the gpio descriptor
    interface
  staging: greybus: arche-platform: Switch to the gpio descriptor
    interface

 drivers/staging/greybus/arche-apb-ctrl.c | 152 +++++++++--------------
 drivers/staging/greybus/arche-platform.c | 124 ++++++------------
 2 files changed, 102 insertions(+), 174 deletions(-)

-- 
2.17.1

[PATCH v6 1/2] staging: greybus: arche-apb-ctrl.c: Switch to the gpio descriptor interface

[Nishad Kamdar]

Use the gpiod interface instead of the deprecated old non-descriptor
interface while continuing to ignore gpio flags from device tree in
functions "deassert_reset()" and "assert_reset()" for now.

Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
---
Changes in v6:
 - Remove some unnecessary line breaks.
Changes in v5:
 - Change the commit message.
 - Restore the names of the gpio device-tree properties without
   the "-gpio" suffix.
Changes in v4:
 - Use gpiod_set_raw_value() for deassert_reset() and
   assert_reset() as gpiod_set_value() will change the
   sematics of these calls by taking any gpio flags
   into account.
 - Remove some unnecesssary line breaks.
 - Restore 'spi_en' gpio check in fw_flashing_seq()
   as it is currently optional.
Changes in v3:
 - Add this patch in a patchset.
Changes in v2:
 - Resolved compilation errors.
---
 drivers/staging/greybus/arche-apb-ctrl.c | 152 +++++++++--------------
 1 file changed, 61 insertions(+), 91 deletions(-)

diff --git a/drivers/staging/greybus/arche-apb-ctrl.c b/drivers/staging/greybus/arche-apb-ctrl.c
index be5ffed90bcf..bbf3ba744fc4 100644
--- a/drivers/staging/greybus/arche-apb-ctrl.c
+++ b/drivers/staging/greybus/arche-apb-ctrl.c
@@ -8,9 +8,8 @@
 
 #include <linux/clk.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/interrupt.h>
-#include <linux/of_gpio.h>
 #include <linux/of_irq.h>
 #include <linux/module.h>
 #include <linux/pinctrl/consumer.h>
@@ -24,12 +23,12 @@ static void apb_bootret_deassert(struct device *dev);
 
 struct arche_apb_ctrl_drvdata {
 	/* Control GPIO signals to and from AP <=> AP Bridges */
-	int resetn_gpio;
-	int boot_ret_gpio;
-	int pwroff_gpio;
-	int wake_in_gpio;
-	int wake_out_gpio;
-	int pwrdn_gpio;
+	struct gpio_desc *resetn;
+	struct gpio_desc *boot_ret;
+	struct gpio_desc *pwroff;
+	struct gpio_desc *wake_in;
+	struct gpio_desc *wake_out;
+	struct gpio_desc *pwrdn;
 
 	enum arche_platform_state state;
 	bool init_disabled;
@@ -37,28 +36,28 @@ struct arche_apb_ctrl_drvdata {
 	struct regulator *vcore;
 	struct regulator *vio;
 
-	int clk_en_gpio;
+	struct gpio_desc *clk_en;
 	struct clk *clk;
 
 	struct pinctrl *pinctrl;
 	struct pinctrl_state *pin_default;
 
 	/* V2: SPI Bus control  */
-	int spi_en_gpio;
+	struct gpio_desc *spi_en;
 	bool spi_en_polarity_high;
 };
 
 /*
  * Note that these low level api's are active high
  */
-static inline void deassert_reset(unsigned int gpio)
+static inline void deassert_reset(struct gpio_desc *gpio)
 {
-	gpio_set_value(gpio, 1);
+	gpiod_set_raw_value(gpio, 1);
 }
 
-static inline void assert_reset(unsigned int gpio)
+static inline void assert_reset(struct gpio_desc *gpio)
 {
-	gpio_set_value(gpio, 0);
+	gpiod_set_raw_value(gpio, 0);
 }
 
 /*
@@ -75,11 +74,10 @@ static int coldboot_seq(struct platform_device *pdev)
 		return 0;
 
 	/* Hold APB in reset state */
-	assert_reset(apb->resetn_gpio);
+	assert_reset(apb->resetn);
 
-	if (apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING &&
-	    gpio_is_valid(apb->spi_en_gpio))
-		devm_gpio_free(dev, apb->spi_en_gpio);
+	if (apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING && apb->spi_en)
+		devm_gpiod_put(dev, apb->spi_en);
 
 	/* Enable power to APB */
 	if (!IS_ERR(apb->vcore)) {
@@ -101,13 +99,13 @@ static int coldboot_seq(struct platform_device *pdev)
 	apb_bootret_deassert(dev);
 
 	/* On DB3 clock was not mandatory */
-	if (gpio_is_valid(apb->clk_en_gpio))
-		gpio_set_value(apb->clk_en_gpio, 1);
+	if (apb->clk_en)
+		gpiod_set_value(apb->clk_en, 1);
 
 	usleep_range(100, 200);
 
 	/* deassert reset to APB : Active-low signal */
-	deassert_reset(apb->resetn_gpio);
+	deassert_reset(apb->resetn);
 
 	apb->state = ARCHE_PLATFORM_STATE_ACTIVE;
 
@@ -136,25 +134,25 @@ static int fw_flashing_seq(struct platform_device *pdev)
 		return ret;
 	}
 
-	if (gpio_is_valid(apb->spi_en_gpio)) {
+	if (apb->spi_en) {
 		unsigned long flags;
 
 		if (apb->spi_en_polarity_high)
-			flags = GPIOF_OUT_INIT_HIGH;
+			flags = GPIOD_OUT_HIGH;
 		else
-			flags = GPIOF_OUT_INIT_LOW;
+			flags = GPIOD_OUT_LOW;
 
-		ret = devm_gpio_request_one(dev, apb->spi_en_gpio,
-					    flags, "apb_spi_en");
-		if (ret) {
-			dev_err(dev, "Failed requesting SPI bus en gpio %d\n",
-				apb->spi_en_gpio);
+		apb->spi_en = devm_gpiod_get(dev, "spi-en", flags);
+		if (IS_ERR(apb->spi_en)) {
+			ret = PTR_ERR(apb->spi_en);
+			dev_err(dev, "Failed requesting SPI bus en GPIO: %d\n",
+				ret);
 			return ret;
 		}
 	}
 
 	/* for flashing device should be in reset state */
-	assert_reset(apb->resetn_gpio);
+	assert_reset(apb->resetn);
 	apb->state = ARCHE_PLATFORM_STATE_FW_FLASHING;
 
 	return 0;
@@ -176,9 +174,8 @@ static int standby_boot_seq(struct platform_device *pdev)
 	    apb->state == ARCHE_PLATFORM_STATE_OFF)
 		return 0;
 
-	if (apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING &&
-	    gpio_is_valid(apb->spi_en_gpio))
-		devm_gpio_free(dev, apb->spi_en_gpio);
+	if (apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING && apb->spi_en)
+		devm_gpiod_put(dev, apb->spi_en);
 
 	/*
 	 * As per WDM spec, do nothing
@@ -201,13 +198,12 @@ static void poweroff_seq(struct platform_device *pdev)
 	if (apb->init_disabled || apb->state == ARCHE_PLATFORM_STATE_OFF)
 		return;
 
-	if (apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING &&
-	    gpio_is_valid(apb->spi_en_gpio))
-		devm_gpio_free(dev, apb->spi_en_gpio);
+	if (apb->state == ARCHE_PLATFORM_STATE_FW_FLASHING && apb->spi_en)
+		devm_gpiod_put(dev, apb->spi_en);
 
 	/* disable the clock */
-	if (gpio_is_valid(apb->clk_en_gpio))
-		gpio_set_value(apb->clk_en_gpio, 0);
+	if (apb->clk_en)
+		gpiod_set_value(apb->clk_en, 0);
 
 	if (!IS_ERR(apb->vcore) && regulator_is_enabled(apb->vcore) > 0)
 		regulator_disable(apb->vcore);
@@ -216,7 +212,7 @@ static void poweroff_seq(struct platform_device *pdev)
 		regulator_disable(apb->vio);
 
 	/* As part of exit, put APB back in reset state */
-	assert_reset(apb->resetn_gpio);
+	assert_reset(apb->resetn);
 	apb->state = ARCHE_PLATFORM_STATE_OFF;
 
 	/* TODO: May have to send an event to SVC about this exit */
@@ -226,7 +222,7 @@ static void apb_bootret_deassert(struct device *dev)
 {
 	struct arche_apb_ctrl_drvdata *apb = dev_get_drvdata(dev);
 
-	gpio_set_value(apb->boot_ret_gpio, 0);
+	gpiod_set_value(apb->boot_ret, 0);
 }
 
 int apb_ctrl_coldboot(struct device *dev)
@@ -322,66 +318,44 @@ static int apb_ctrl_get_devtree_data(struct platform_device *pdev,
 				     struct arche_apb_ctrl_drvdata *apb)
 {
 	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
 	int ret;
 
-	apb->resetn_gpio = of_get_named_gpio(np, "reset-gpios", 0);
-	if (apb->resetn_gpio < 0) {
-		dev_err(dev, "failed to get reset gpio\n");
-		return apb->resetn_gpio;
-	}
-	ret = devm_gpio_request_one(dev, apb->resetn_gpio,
-				    GPIOF_OUT_INIT_LOW, "apb-reset");
-	if (ret) {
-		dev_err(dev, "Failed requesting reset gpio %d\n",
-			apb->resetn_gpio);
+	apb->resetn = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(apb->resetn)) {
+		ret = PTR_ERR(apb->resetn);
+		dev_err(dev, "Failed requesting reset GPIO: %d\n", ret);
 		return ret;
 	}
 
-	apb->boot_ret_gpio = of_get_named_gpio(np, "boot-ret-gpios", 0);
-	if (apb->boot_ret_gpio < 0) {
-		dev_err(dev, "failed to get boot retention gpio\n");
-		return apb->boot_ret_gpio;
-	}
-	ret = devm_gpio_request_one(dev, apb->boot_ret_gpio,
-				    GPIOF_OUT_INIT_LOW, "boot retention");
-	if (ret) {
-		dev_err(dev, "Failed requesting bootret gpio %d\n",
-			apb->boot_ret_gpio);
+	apb->boot_ret = devm_gpiod_get(dev, "boot-ret", GPIOD_OUT_LOW);
+	if (IS_ERR(apb->boot_ret)) {
+		ret = PTR_ERR(apb->boot_ret);
+		dev_err(dev, "Failed requesting bootret GPIO: %d\n", ret);
 		return ret;
 	}
 
 	/* It's not mandatory to support power management interface */
-	apb->pwroff_gpio = of_get_named_gpio(np, "pwr-off-gpios", 0);
-	if (apb->pwroff_gpio < 0) {
-		dev_err(dev, "failed to get power off gpio\n");
-		return apb->pwroff_gpio;
-	}
-	ret = devm_gpio_request_one(dev, apb->pwroff_gpio,
-				    GPIOF_IN, "pwroff_n");
-	if (ret) {
-		dev_err(dev, "Failed requesting pwroff_n gpio %d\n",
-			apb->pwroff_gpio);
+	apb->pwroff = devm_gpiod_get_optional(dev, "pwr-off", GPIOD_IN);
+	if (IS_ERR(apb->pwroff)) {
+		ret = PTR_ERR(apb->pwroff);
+		dev_err(dev, "Failed requesting pwroff_n GPIO: %d\n", ret);
 		return ret;
 	}
 
 	/* Do not make clock mandatory as of now (for DB3) */
-	apb->clk_en_gpio = of_get_named_gpio(np, "clock-en-gpio", 0);
-	if (apb->clk_en_gpio < 0) {
-		dev_warn(dev, "failed to get clock en gpio\n");
-	} else if (gpio_is_valid(apb->clk_en_gpio)) {
-		ret = devm_gpio_request_one(dev, apb->clk_en_gpio,
-					    GPIOF_OUT_INIT_LOW, "apb_clk_en");
-		if (ret) {
-			dev_warn(dev, "Failed requesting APB clock en gpio %d\n",
-				 apb->clk_en_gpio);
-			return ret;
-		}
+	apb->clk_en = devm_gpiod_get_optional(dev, "clock-en", GPIOD_OUT_LOW);
+	if (IS_ERR(apb->clk_en)) {
+		ret = PTR_ERR(apb->clk_en);
+		dev_err(dev, "Failed requesting APB clock en GPIO: %d\n", ret);
+		return ret;
 	}
 
-	apb->pwrdn_gpio = of_get_named_gpio(np, "pwr-down-gpios", 0);
-	if (apb->pwrdn_gpio < 0)
-		dev_warn(dev, "failed to get power down gpio\n");
+	apb->pwrdn = devm_gpiod_get(dev, "pwr-down", GPIOD_OUT_LOW);
+	if (IS_ERR(apb->pwrdn)) {
+		ret = PTR_ERR(apb->pwrdn);
+		dev_warn(dev, "Failed requesting power down GPIO: %d\n", ret);
+		return ret;
+	}
 
 	/* Regulators are optional, as we may have fixed supply coming in */
 	apb->vcore = devm_regulator_get(dev, "vcore");
@@ -404,12 +378,8 @@ static int apb_ctrl_get_devtree_data(struct platform_device *pdev,
 	}
 
 	/* Only applicable for platform >= V2 */
-	apb->spi_en_gpio = of_get_named_gpio(np, "spi-en-gpio", 0);
-	if (apb->spi_en_gpio >= 0) {
-		if (of_property_read_bool(pdev->dev.of_node,
-					  "spi-en-active-high"))
-			apb->spi_en_polarity_high = true;
-	}
+	if (of_property_read_bool(pdev->dev.of_node, "gb,spi-en-active-high"))
+		apb->spi_en_polarity_high = true;
 
 	return 0;
 }
-- 
2.17.1

[PATCH v6 2/2] staging: greybus: arche-platform: Switch to the gpio descriptor interface

[Nishad Kamdar]

Use the gpiod interface instead of the deprecated old non-descriptor
interface while continuing to ignore gpio flags from device tree in
"svc_reset_onoff()" for now.

Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
---
Changes in v6:
  - Make error messages consistent.
Changes in v5:
  - Change the commit message.
  - Restore the names of the gpio device-tree properties without
    the "-gpio" suffix.
Changes in v4:
 - Move 'gpio_desc *svc_sysboot' below the reset flag
   as it is more logical to have reset flag below
   reset gpio.
 - Remove a few unnecessary line breaks.
Changes in v3:
 - Add this patch to a patchset.
Changes in v2:
 - Move comment to the same line as to what it applies to.
---
 drivers/staging/greybus/arche-platform.c | 124 ++++++++---------------
 1 file changed, 41 insertions(+), 83 deletions(-)

diff --git a/drivers/staging/greybus/arche-platform.c b/drivers/staging/greybus/arche-platform.c
index 4c36e88766e7..6eb842040c22 100644
--- a/drivers/staging/greybus/arche-platform.c
+++ b/drivers/staging/greybus/arche-platform.c
@@ -8,10 +8,9 @@
 
 #include <linux/clk.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/of_gpio.h>
 #include <linux/of_platform.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/platform_device.h>
@@ -45,14 +44,14 @@ enum svc_wakedetect_state {
 
 struct arche_platform_drvdata {
 	/* Control GPIO signals to and from AP <=> SVC */
-	int svc_reset_gpio;
+	struct gpio_desc *svc_reset;
 	bool is_reset_act_hi;
-	int svc_sysboot_gpio;
-	int wake_detect_gpio; /* bi-dir,maps to WAKE_MOD & WAKE_FRAME signals */
+	struct gpio_desc *svc_sysboot;
+	struct gpio_desc *wake_detect; /* bi-dir,maps to WAKE_MOD & WAKE_FRAME signals */
 
 	enum arche_platform_state state;
 
-	int svc_refclk_req;
+	struct gpio_desc *svc_refclk_req;
 	struct clk *svc_ref_clk;
 
 	struct pinctrl *pinctrl;
@@ -85,9 +84,9 @@ static void arche_platform_set_wake_detect_state(
 	arche_pdata->wake_detect_state = state;
 }
 
-static inline void svc_reset_onoff(unsigned int gpio, bool onoff)
+static inline void svc_reset_onoff(struct gpio_desc *gpio, bool onoff)
 {
-	gpio_set_value(gpio, onoff);
+	gpiod_set_raw_value(gpio, onoff);
 }
 
 static int apb_cold_boot(struct device *dev, void *data)
@@ -116,7 +115,6 @@ static int apb_poweroff(struct device *dev, void *data)
 static void arche_platform_wd_irq_en(struct arche_platform_drvdata *arche_pdata)
 {
 	/* Enable interrupt here, to read event back from SVC */
-	gpio_direction_input(arche_pdata->wake_detect_gpio);
 	enable_irq(arche_pdata->wake_detect_irq);
 }
 
@@ -160,7 +158,7 @@ static irqreturn_t arche_platform_wd_irq(int irq, void *devid)
 
 	spin_lock_irqsave(&arche_pdata->wake_lock, flags);
 
-	if (gpio_get_value(arche_pdata->wake_detect_gpio)) {
+	if (gpiod_get_value(arche_pdata->wake_detect)) {
 		/* wake/detect rising */
 
 		/*
@@ -224,10 +222,9 @@ arche_platform_coldboot_seq(struct arche_platform_drvdata *arche_pdata)
 
 	dev_info(arche_pdata->dev, "Booting from cold boot state\n");
 
-	svc_reset_onoff(arche_pdata->svc_reset_gpio,
-			arche_pdata->is_reset_act_hi);
+	svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi);
 
-	gpio_set_value(arche_pdata->svc_sysboot_gpio, 0);
+	gpiod_set_value(arche_pdata->svc_sysboot, 0);
 	usleep_range(100, 200);
 
 	ret = clk_prepare_enable(arche_pdata->svc_ref_clk);
@@ -238,8 +235,7 @@ arche_platform_coldboot_seq(struct arche_platform_drvdata *arche_pdata)
 	}
 
 	/* bring SVC out of reset */
-	svc_reset_onoff(arche_pdata->svc_reset_gpio,
-			!arche_pdata->is_reset_act_hi);
+	svc_reset_onoff(arche_pdata->svc_reset, !arche_pdata->is_reset_act_hi);
 
 	arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_ACTIVE);
 
@@ -259,10 +255,9 @@ arche_platform_fw_flashing_seq(struct arche_platform_drvdata *arche_pdata)
 
 	dev_info(arche_pdata->dev, "Switching to FW flashing state\n");
 
-	svc_reset_onoff(arche_pdata->svc_reset_gpio,
-			arche_pdata->is_reset_act_hi);
+	svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi);
 
-	gpio_set_value(arche_pdata->svc_sysboot_gpio, 1);
+	gpiod_set_value(arche_pdata->svc_sysboot, 1);
 
 	usleep_range(100, 200);
 
@@ -273,8 +268,7 @@ arche_platform_fw_flashing_seq(struct arche_platform_drvdata *arche_pdata)
 		return ret;
 	}
 
-	svc_reset_onoff(arche_pdata->svc_reset_gpio,
-			!arche_pdata->is_reset_act_hi);
+	svc_reset_onoff(arche_pdata->svc_reset,	!arche_pdata->is_reset_act_hi);
 
 	arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_FW_FLASHING);
 
@@ -305,8 +299,7 @@ arche_platform_poweroff_seq(struct arche_platform_drvdata *arche_pdata)
 	clk_disable_unprepare(arche_pdata->svc_ref_clk);
 
 	/* As part of exit, put APB back in reset state */
-	svc_reset_onoff(arche_pdata->svc_reset_gpio,
-			arche_pdata->is_reset_act_hi);
+	svc_reset_onoff(arche_pdata->svc_reset,	arche_pdata->is_reset_act_hi);
 
 	arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_OFF);
 }
@@ -435,6 +428,7 @@ static int arche_platform_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
 	int ret;
+	unsigned int flags;
 
 	arche_pdata = devm_kzalloc(&pdev->dev, sizeof(*arche_pdata),
 				   GFP_KERNEL);
@@ -444,61 +438,33 @@ static int arche_platform_probe(struct platform_device *pdev)
 	/* setup svc reset gpio */
 	arche_pdata->is_reset_act_hi = of_property_read_bool(np,
 							     "svc,reset-active-high");
-	arche_pdata->svc_reset_gpio = of_get_named_gpio(np,
-							"svc,reset-gpio",
-							0);
-	if (!gpio_is_valid(arche_pdata->svc_reset_gpio)) {
-		dev_err(dev, "failed to get reset-gpio\n");
-		return arche_pdata->svc_reset_gpio;
-	}
-	ret = devm_gpio_request(dev, arche_pdata->svc_reset_gpio, "svc-reset");
-	if (ret) {
-		dev_err(dev, "failed to request svc-reset gpio:%d\n", ret);
-		return ret;
-	}
-	ret = gpio_direction_output(arche_pdata->svc_reset_gpio,
-				    arche_pdata->is_reset_act_hi);
-	if (ret) {
-		dev_err(dev, "failed to set svc-reset gpio dir:%d\n", ret);
+	if (arche_pdata->is_reset_act_hi)
+		flags = GPIOD_OUT_HIGH;
+	else
+		flags = GPIOD_OUT_LOW;
+
+	arche_pdata->svc_reset = devm_gpiod_get(dev, "svc,reset", flags);
+	if (IS_ERR(arche_pdata->svc_reset)) {
+		ret = PTR_ERR(arche_pdata->svc_reset);
+		dev_err(dev, "failed to request svc-reset GPIO: %d\n", ret);
 		return ret;
 	}
 	arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_OFF);
 
-	arche_pdata->svc_sysboot_gpio = of_get_named_gpio(np,
-							  "svc,sysboot-gpio",
-							  0);
-	if (!gpio_is_valid(arche_pdata->svc_sysboot_gpio)) {
-		dev_err(dev, "failed to get sysboot gpio\n");
-		return arche_pdata->svc_sysboot_gpio;
-	}
-	ret = devm_gpio_request(dev, arche_pdata->svc_sysboot_gpio, "sysboot0");
-	if (ret) {
-		dev_err(dev, "failed to request sysboot0 gpio:%d\n", ret);
-		return ret;
-	}
-	ret = gpio_direction_output(arche_pdata->svc_sysboot_gpio, 0);
-	if (ret) {
-		dev_err(dev, "failed to set svc-reset gpio dir:%d\n", ret);
+	arche_pdata->svc_sysboot = devm_gpiod_get(dev, "svc,sysboot",
+						  GPIOD_OUT_LOW);
+	if (IS_ERR(arche_pdata->svc_sysboot)) {
+		ret = PTR_ERR(arche_pdata->svc_sysboot);
+		dev_err(dev, "failed to request sysboot0 GPIO: %d\n", ret);
 		return ret;
 	}
 
 	/* setup the clock request gpio first */
-	arche_pdata->svc_refclk_req = of_get_named_gpio(np,
-							"svc,refclk-req-gpio",
-							0);
-	if (!gpio_is_valid(arche_pdata->svc_refclk_req)) {
-		dev_err(dev, "failed to get svc clock-req gpio\n");
-		return arche_pdata->svc_refclk_req;
-	}
-	ret = devm_gpio_request(dev, arche_pdata->svc_refclk_req,
-				"svc-clk-req");
-	if (ret) {
-		dev_err(dev, "failed to request svc-clk-req gpio: %d\n", ret);
-		return ret;
-	}
-	ret = gpio_direction_input(arche_pdata->svc_refclk_req);
-	if (ret) {
-		dev_err(dev, "failed to set svc-clk-req gpio dir :%d\n", ret);
+	arche_pdata->svc_refclk_req = devm_gpiod_get(dev, "svc,refclk-req",
+						     GPIOD_IN);
+	if (IS_ERR(arche_pdata->svc_refclk_req)) {
+		ret = PTR_ERR(arche_pdata->svc_refclk_req);
+		dev_err(dev, "failed to request svc-clk-req GPIO: %d\n", ret);
 		return ret;
 	}
 
@@ -515,19 +481,11 @@ static int arche_platform_probe(struct platform_device *pdev)
 	arche_pdata->num_apbs = of_get_child_count(np);
 	dev_dbg(dev, "Number of APB's available - %d\n", arche_pdata->num_apbs);
 
-	arche_pdata->wake_detect_gpio = of_get_named_gpio(np,
-							  "svc,wake-detect-gpio",
-							  0);
-	if (arche_pdata->wake_detect_gpio < 0) {
-		dev_err(dev, "failed to get wake detect gpio\n");
-		return arche_pdata->wake_detect_gpio;
-	}
-
-	ret = devm_gpio_request(dev, arche_pdata->wake_detect_gpio,
-				"wake detect");
-	if (ret) {
-		dev_err(dev, "Failed requesting wake_detect gpio %d\n",
-			arche_pdata->wake_detect_gpio);
+	arche_pdata->wake_detect = devm_gpiod_get(dev, "svc,wake-detect",
+						  GPIOD_IN);
+	if (IS_ERR(arche_pdata->wake_detect)) {
+		ret = PTR_ERR(arche_pdata->wake_detect);
+		dev_err(dev, "Failed requesting wake_detect GPIO: %d\n", ret);
 		return ret;
 	}
 
@@ -538,7 +496,7 @@ static int arche_platform_probe(struct platform_device *pdev)
 	spin_lock_init(&arche_pdata->wake_lock);
 	mutex_init(&arche_pdata->platform_state_mutex);
 	arche_pdata->wake_detect_irq =
-		gpio_to_irq(arche_pdata->wake_detect_gpio);
+		gpiod_to_irq(arche_pdata->wake_detect);
 
 	ret = devm_request_threaded_irq(dev, arche_pdata->wake_detect_irq,
 					arche_platform_wd_irq,
-- 
2.17.1

Re: [PATCH v6 0/2] greybus: gpio: Switch to the gpio descriptor interface

[Johan Hovold]

On Fri, Jan 11, 2019 at 09:03:16PM +0530, Nishad Kamdar wrote:
> This patch series converts uses of the old GPIO API to the GPIO
> descriptor API. It also converts the GPIO driver to use the
> GPIO irqchip library GPIOLIB_IRQCHIP instead of repimplementing
> the same.
> 
> Changes in v6:
>  - Patchset now contains two patches as the patch
>    1 has been accepted.

All three patches look good now, but since Greg picks these up directly
and applies them to the staging tree, it is best if you submit all three
patches (with my reviewed-by tag) in a series.

One last resend as v7?

Thanks again for doing this.

Johan

Re: [PATCH v6 0/2] greybus: gpio: Switch to the gpio descriptor interface

[Nishad Kamdar]

On Mon, Jan 14, 2019 at 10:05:17AM +0100, Johan Hovold wrote:
> On Fri, Jan 11, 2019 at 09:03:16PM +0530, Nishad Kamdar wrote:
> > This patch series converts uses of the old GPIO API to the GPIO
> > descriptor API. It also converts the GPIO driver to use the
> > GPIO irqchip library GPIOLIB_IRQCHIP instead of repimplementing
> > the same.
> > 
> > Changes in v6:
> >  - Patchset now contains two patches as the patch
> >    1 has been accepted.
> 
> All three patches look good now, but since Greg picks these up directly
> and applies them to the staging tree, it is best if you submit all three
> patches (with my reviewed-by tag) in a series.
> 
Sure, I'll do that.
> One last resend as v7?
> 
> Thanks again for doing this.
> 
> Johan

Thanks for all the reviews.

Regards,
Nishad