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gpio: viperboard: use new GPIO line value setter callbacks

Browse source 
struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Link: https://lore.kernel.org/r/20250707-gpiochip-set-rv-gpio-round4-v1-11-35668aaaf6d2@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Bartosz Golaszewski 2025-07-07 09:50:24 +02:00
parent 42fbbe3163
commit 55e2d1eec1
1 changed files with 63 additions and 53 deletions
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52
drivers/gpio/gpio-viperboard.c
View file

@ -128,15 +128,17 @@ static int vprbrd_gpioa_get(struct gpio_chip *chip,
return answer; return answer;
} }
static void vprbrd_gpioa_set(struct gpio_chip *chip, static int vprbrd_gpioa_set(struct gpio_chip *chip, unsigned int offset,
unsigned int offset, int value) int value)
{ {
int ret; int ret = 0;
struct vprbrd_gpio *gpio = gpiochip_get_data(chip); struct vprbrd_gpio *gpio = gpiochip_get_data(chip);
struct vprbrd *vb = gpio->vb; struct vprbrd *vb = gpio->vb;
struct vprbrd_gpioa_msg *gamsg = (struct vprbrd_gpioa_msg *)vb->buf; struct vprbrd_gpioa_msg *gamsg = (struct vprbrd_gpioa_msg *)vb->buf;
if (gpio->gpioa_out & (1 << offset)) { if (!(gpio->gpioa_out & (1 << offset)))
return 0;
if (value) if (value)
gpio->gpioa_val |= (1 << offset); gpio->gpioa_val |= (1 << offset);
else else
@ -156,17 +158,20 @@ static void vprbrd_gpioa_set(struct gpio_chip *chip,
gamsg->answer = 0x00; gamsg->answer = 0x00;
gamsg->__fill = 0x00; gamsg->__fill = 0x00;
ret = usb_control_msg(vb->usb_dev, ret = usb_control_msg(vb->usb_dev, usb_sndctrlpipe(vb->usb_dev, 0),
usb_sndctrlpipe(vb->usb_dev, 0),
VPRBRD_USB_REQUEST_GPIOA, VPRBRD_USB_TYPE_OUT, VPRBRD_USB_REQUEST_GPIOA, VPRBRD_USB_TYPE_OUT,
0x0000, 0x0000, gamsg, 0x0000, 0x0000, gamsg,
sizeof(struct vprbrd_gpioa_msg), VPRBRD_USB_TIMEOUT_MS); sizeof(struct vprbrd_gpioa_msg),
VPRBRD_USB_TIMEOUT_MS);
mutex_unlock(&vb->lock); mutex_unlock(&vb->lock);
if (ret != sizeof(struct vprbrd_gpioa_msg)) if (ret != sizeof(struct vprbrd_gpioa_msg)) {
dev_err(chip->parent, "usb error setting pin value\n"); dev_err(chip->parent, "usb error setting pin value\n");
return -EREMOTEIO;
} }
return 0;
} }
static int vprbrd_gpioa_direction_input(struct gpio_chip *chip, static int vprbrd_gpioa_direction_input(struct gpio_chip *chip,
@ -304,15 +309,17 @@ static int vprbrd_gpiob_get(struct gpio_chip *chip,
return (gpio->gpiob_val >> offset) & 0x1; return (gpio->gpiob_val >> offset) & 0x1;
} }
static void vprbrd_gpiob_set(struct gpio_chip *chip, static int vprbrd_gpiob_set(struct gpio_chip *chip, unsigned int offset,
unsigned int offset, int value) int value)
{ {
int ret; int ret;
struct vprbrd_gpio *gpio = gpiochip_get_data(chip); struct vprbrd_gpio *gpio = gpiochip_get_data(chip);
struct vprbrd *vb = gpio->vb; struct vprbrd *vb = gpio->vb;
struct vprbrd_gpiob_msg *gbmsg = (struct vprbrd_gpiob_msg *)vb->buf; struct vprbrd_gpiob_msg *gbmsg = (struct vprbrd_gpiob_msg *)vb->buf;
if (gpio->gpiob_out & (1 << offset)) { if (!(gpio->gpiob_out & (1 << offset)))
return 0;
if (value) if (value)
gpio->gpiob_val |= (1 << offset); gpio->gpiob_val |= (1 << offset);
else else
@ -324,17 +331,20 @@ static void vprbrd_gpiob_set(struct gpio_chip *chip,
gbmsg->val = cpu_to_be16(value << offset); gbmsg->val = cpu_to_be16(value << offset);
gbmsg->mask = cpu_to_be16(0x0001 << offset); gbmsg->mask = cpu_to_be16(0x0001 << offset);
ret = usb_control_msg(vb->usb_dev, ret = usb_control_msg(vb->usb_dev, usb_sndctrlpipe(vb->usb_dev, 0),
usb_sndctrlpipe(vb->usb_dev, 0),
VPRBRD_USB_REQUEST_GPIOB, VPRBRD_USB_TYPE_OUT, VPRBRD_USB_REQUEST_GPIOB, VPRBRD_USB_TYPE_OUT,
0x0000, 0x0000, gbmsg, 0x0000, 0x0000, gbmsg,
sizeof(struct vprbrd_gpiob_msg), VPRBRD_USB_TIMEOUT_MS); sizeof(struct vprbrd_gpiob_msg),
VPRBRD_USB_TIMEOUT_MS);
mutex_unlock(&vb->lock); mutex_unlock(&vb->lock);
if (ret != sizeof(struct vprbrd_gpiob_msg)) if (ret != sizeof(struct vprbrd_gpiob_msg)) {
dev_err(chip->parent, "usb error setting pin value\n"); dev_err(chip->parent, "usb error setting pin value\n");
return -EREMOTEIO;
} }
return 0;
} }
static int vprbrd_gpiob_direction_input(struct gpio_chip *chip, static int vprbrd_gpiob_direction_input(struct gpio_chip *chip,
@ -370,14 +380,14 @@ static int vprbrd_gpiob_direction_output(struct gpio_chip *chip,
mutex_lock(&vb->lock); mutex_lock(&vb->lock);
ret = vprbrd_gpiob_setdir(vb, offset, 1); ret = vprbrd_gpiob_setdir(vb, offset, 1);
if (ret) if (ret) {
dev_err(chip->parent, "usb error setting pin to output\n"); dev_err(chip->parent, "usb error setting pin to output\n");
return ret;
}
mutex_unlock(&vb->lock); mutex_unlock(&vb->lock);
vprbrd_gpiob_set(chip, offset, value); return vprbrd_gpiob_set(chip, offset, value);
return ret;
} }
/* ----- end of gpio b chip ---------------------------------------------- */ /* ----- end of gpio b chip ---------------------------------------------- */
@ -400,7 +410,7 @@ static int vprbrd_gpio_probe(struct platform_device *pdev)
vb_gpio->gpioa.base = -1; vb_gpio->gpioa.base = -1;
vb_gpio->gpioa.ngpio = 16; vb_gpio->gpioa.ngpio = 16;
vb_gpio->gpioa.can_sleep = true; vb_gpio->gpioa.can_sleep = true;
vb_gpio->gpioa.set = vprbrd_gpioa_set; vb_gpio->gpioa.set_rv = vprbrd_gpioa_set;
vb_gpio->gpioa.get = vprbrd_gpioa_get; vb_gpio->gpioa.get = vprbrd_gpioa_get;
vb_gpio->gpioa.direction_input = vprbrd_gpioa_direction_input; vb_gpio->gpioa.direction_input = vprbrd_gpioa_direction_input;
vb_gpio->gpioa.direction_output = vprbrd_gpioa_direction_output; vb_gpio->gpioa.direction_output = vprbrd_gpioa_direction_output;
@ -416,7 +426,7 @@ static int vprbrd_gpio_probe(struct platform_device *pdev)
vb_gpio->gpiob.base = -1; vb_gpio->gpiob.base = -1;
vb_gpio->gpiob.ngpio = 16; vb_gpio->gpiob.ngpio = 16;
vb_gpio->gpiob.can_sleep = true; vb_gpio->gpiob.can_sleep = true;
vb_gpio->gpiob.set = vprbrd_gpiob_set; vb_gpio->gpiob.set_rv = vprbrd_gpiob_set;
vb_gpio->gpiob.get = vprbrd_gpiob_get; vb_gpio->gpiob.get = vprbrd_gpiob_get;
vb_gpio->gpiob.direction_input = vprbrd_gpiob_direction_input; vb_gpio->gpiob.direction_input = vprbrd_gpiob_direction_input;
vb_gpio->gpiob.direction_output = vprbrd_gpiob_direction_output; vb_gpio->gpiob.direction_output = vprbrd_gpiob_direction_output;