From: Bartosz Golaszewski Date: Mon, 7 Jul 2025 07:50:24 +0000 (+0200) Subject: gpio: viperboard: use new GPIO line value setter callbacks X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=55e2d1eec110f1278324882714b64465e4e58ced;p=thirdparty%2Fkernel%2Flinux.git gpio: viperboard: use new GPIO line value setter callbacks 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 --- diff --git a/drivers/gpio/gpio-viperboard.c b/drivers/gpio/gpio-viperboard.c index e55d28a8a66f2..3eba77f981d3a 100644 --- a/drivers/gpio/gpio-viperboard.c +++ b/drivers/gpio/gpio-viperboard.c @@ -128,45 +128,50 @@ static int vprbrd_gpioa_get(struct gpio_chip *chip, return answer; } -static void vprbrd_gpioa_set(struct gpio_chip *chip, - unsigned int offset, int value) +static int vprbrd_gpioa_set(struct gpio_chip *chip, unsigned int offset, + int value) { - int ret; + int ret = 0; struct vprbrd_gpio *gpio = gpiochip_get_data(chip); struct vprbrd *vb = gpio->vb; struct vprbrd_gpioa_msg *gamsg = (struct vprbrd_gpioa_msg *)vb->buf; - if (gpio->gpioa_out & (1 << offset)) { - if (value) - gpio->gpioa_val |= (1 << offset); - else - gpio->gpioa_val &= ~(1 << offset); - - mutex_lock(&vb->lock); - - gamsg->cmd = VPRBRD_GPIOA_CMD_SETOUT; - gamsg->clk = 0x00; - gamsg->offset = offset; - gamsg->t1 = 0x00; - gamsg->t2 = 0x00; - gamsg->invert = 0x00; - gamsg->pwmlevel = 0x00; - gamsg->outval = value; - gamsg->risefall = 0x00; - gamsg->answer = 0x00; - gamsg->__fill = 0x00; - - ret = usb_control_msg(vb->usb_dev, - usb_sndctrlpipe(vb->usb_dev, 0), - VPRBRD_USB_REQUEST_GPIOA, VPRBRD_USB_TYPE_OUT, - 0x0000, 0x0000, gamsg, - sizeof(struct vprbrd_gpioa_msg), VPRBRD_USB_TIMEOUT_MS); - - mutex_unlock(&vb->lock); - - if (ret != sizeof(struct vprbrd_gpioa_msg)) - dev_err(chip->parent, "usb error setting pin value\n"); + if (!(gpio->gpioa_out & (1 << offset))) + return 0; + + if (value) + gpio->gpioa_val |= (1 << offset); + else + gpio->gpioa_val &= ~(1 << offset); + + mutex_lock(&vb->lock); + + gamsg->cmd = VPRBRD_GPIOA_CMD_SETOUT; + gamsg->clk = 0x00; + gamsg->offset = offset; + gamsg->t1 = 0x00; + gamsg->t2 = 0x00; + gamsg->invert = 0x00; + gamsg->pwmlevel = 0x00; + gamsg->outval = value; + gamsg->risefall = 0x00; + gamsg->answer = 0x00; + gamsg->__fill = 0x00; + + ret = usb_control_msg(vb->usb_dev, usb_sndctrlpipe(vb->usb_dev, 0), + VPRBRD_USB_REQUEST_GPIOA, VPRBRD_USB_TYPE_OUT, + 0x0000, 0x0000, gamsg, + sizeof(struct vprbrd_gpioa_msg), + VPRBRD_USB_TIMEOUT_MS); + + mutex_unlock(&vb->lock); + + if (ret != sizeof(struct vprbrd_gpioa_msg)) { + dev_err(chip->parent, "usb error setting pin value\n"); + return -EREMOTEIO; } + + return 0; } static int vprbrd_gpioa_direction_input(struct gpio_chip *chip, @@ -304,37 +309,42 @@ static int vprbrd_gpiob_get(struct gpio_chip *chip, return (gpio->gpiob_val >> offset) & 0x1; } -static void vprbrd_gpiob_set(struct gpio_chip *chip, - unsigned int offset, int value) +static int vprbrd_gpiob_set(struct gpio_chip *chip, unsigned int offset, + int value) { int ret; struct vprbrd_gpio *gpio = gpiochip_get_data(chip); struct vprbrd *vb = gpio->vb; struct vprbrd_gpiob_msg *gbmsg = (struct vprbrd_gpiob_msg *)vb->buf; - if (gpio->gpiob_out & (1 << offset)) { - if (value) - gpio->gpiob_val |= (1 << offset); - else - gpio->gpiob_val &= ~(1 << offset); + if (!(gpio->gpiob_out & (1 << offset))) + return 0; - mutex_lock(&vb->lock); + if (value) + gpio->gpiob_val |= (1 << offset); + else + gpio->gpiob_val &= ~(1 << offset); - gbmsg->cmd = VPRBRD_GPIOB_CMD_SETVAL; - gbmsg->val = cpu_to_be16(value << offset); - gbmsg->mask = cpu_to_be16(0x0001 << offset); + mutex_lock(&vb->lock); - ret = usb_control_msg(vb->usb_dev, - usb_sndctrlpipe(vb->usb_dev, 0), - VPRBRD_USB_REQUEST_GPIOB, VPRBRD_USB_TYPE_OUT, - 0x0000, 0x0000, gbmsg, - sizeof(struct vprbrd_gpiob_msg), VPRBRD_USB_TIMEOUT_MS); + gbmsg->cmd = VPRBRD_GPIOB_CMD_SETVAL; + gbmsg->val = cpu_to_be16(value << offset); + gbmsg->mask = cpu_to_be16(0x0001 << offset); - mutex_unlock(&vb->lock); + ret = usb_control_msg(vb->usb_dev, usb_sndctrlpipe(vb->usb_dev, 0), + VPRBRD_USB_REQUEST_GPIOB, VPRBRD_USB_TYPE_OUT, + 0x0000, 0x0000, gbmsg, + sizeof(struct vprbrd_gpiob_msg), + VPRBRD_USB_TIMEOUT_MS); - if (ret != sizeof(struct vprbrd_gpiob_msg)) - dev_err(chip->parent, "usb error setting pin value\n"); + mutex_unlock(&vb->lock); + + if (ret != sizeof(struct vprbrd_gpiob_msg)) { + dev_err(chip->parent, "usb error setting pin value\n"); + return -EREMOTEIO; } + + return 0; } 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); ret = vprbrd_gpiob_setdir(vb, offset, 1); - if (ret) + if (ret) { dev_err(chip->parent, "usb error setting pin to output\n"); + return ret; + } mutex_unlock(&vb->lock); - vprbrd_gpiob_set(chip, offset, value); - - return ret; + return vprbrd_gpiob_set(chip, offset, value); } /* ----- 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.ngpio = 16; 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.direction_input = vprbrd_gpioa_direction_input; 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.ngpio = 16; 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.direction_input = vprbrd_gpiob_direction_input; vb_gpio->gpiob.direction_output = vprbrd_gpiob_direction_output;