[PATCH v2] staging: greybus: arche-platform: Switch to the gpio descriptor interface

From: Nishad Kamdar
Date: Sat Nov 17 2018 - 02:25:49 EST

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Use the gpiod interface instead of the deprecated
old non-descriptor interface.

Signed-off-by: Nishad Kamdar <nishadkamdar@xxxxxxxxx>
---
Changes in v2:
- Move comment to the same line as to what it applies to.
---
drivers/staging/greybus/arche-platform.c | 119 ++++++++---------------
1 file changed, 41 insertions(+), 78 deletions(-)

diff --git a/drivers/staging/greybus/arche-platform.c b/drivers/staging/greybus/arche-platform.c
index 4c36e88766e7..a5cea79d8e32 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;
+ struct gpio_desc *svc_sysboot;
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 *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_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 +222,10 @@ 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,
+ 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);
@@ -238,7 +236,7 @@ arche_platform_coldboot_seq(struct arche_platform_drvdata *arche_pdata)
}

/* bring SVC out of reset */
- svc_reset_onoff(arche_pdata->svc_reset_gpio,
+ 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 +257,10 @@ 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,
+ 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);

@@ -273,7 +271,7 @@ arche_platform_fw_flashing_seq(struct arche_platform_drvdata *arche_pdata)
return ret;
}

- svc_reset_onoff(arche_pdata->svc_reset_gpio,
+ svc_reset_onoff(arche_pdata->svc_reset,
!arche_pdata->is_reset_act_hi);

arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_FW_FLASHING);
@@ -305,7 +303,7 @@ 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,
+ 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 +433,7 @@ 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 +443,33 @@ 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-gpio", 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-gpio",
+ 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-gpio",
+ 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 +486,11 @@ 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-gpio",
+ 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 +501,7 @@ 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

Next message: Miguel Ojeda: "Re: [PATCH] remove old GCC version implementation"
Previous message: syzbot: "KASAN: use-after-free Read in __lock_sock"
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