diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/gpio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpio/gpio-da9052.c | 6 | ||||
| -rw-r--r-- | drivers/gpio/gpio-ich.c | 1 | ||||
| -rw-r--r-- | drivers/gpio/gpio-mvebu.c | 17 | ||||
| -rw-r--r-- | drivers/gpio/gpio-tps6586x.c | 9 | ||||
| -rw-r--r-- | drivers/gpio/gpio-twl4030.c | 12 | ||||
| -rw-r--r-- | drivers/gpio/gpio-viperboard.c | 517 |
8 files changed, 553 insertions, 24 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index bf892bd68c1..682de754d63 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -172,6 +172,7 @@ config GPIO_MSM_V2 config GPIO_MVEBU def_bool y depends on PLAT_ORION + depends on OF select GPIO_GENERIC select GENERIC_IRQ_CHIP @@ -683,4 +684,17 @@ config GPIO_MSIC Enable support for GPIO on intel MSIC controllers found in intel MID devices +comment "USB GPIO expanders:" + +config GPIO_VIPERBOARD + tristate "Viperboard GPIO a & b support" + depends on MFD_VIPERBOARD && USB + help + Say yes here to access the GPIO signals of Nano River + Technologies Viperboard. There are two GPIO chips on the + board: gpioa and gpiob. + See viperboard API specification and Nano + River Tech's viperboard.h for detailed meaning + of the module parameters. + endif diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 76b34468325..c5aebd008dd 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -76,6 +76,7 @@ obj-$(CONFIG_GPIO_TS5500) += gpio-ts5500.o obj-$(CONFIG_GPIO_TWL4030) += gpio-twl4030.o obj-$(CONFIG_GPIO_TWL6040) += gpio-twl6040.o obj-$(CONFIG_GPIO_UCB1400) += gpio-ucb1400.o +obj-$(CONFIG_GPIO_VIPERBOARD) += gpio-viperboard.o obj-$(CONFIG_GPIO_VR41XX) += gpio-vr41xx.o obj-$(CONFIG_GPIO_VT8500) += gpio-vt8500.o obj-$(CONFIG_GPIO_VX855) += gpio-vx855.o diff --git a/drivers/gpio/gpio-da9052.c b/drivers/gpio/gpio-da9052.c index a05aacd2777..29b11e9b6a7 100644 --- a/drivers/gpio/gpio-da9052.c +++ b/drivers/gpio/gpio-da9052.c @@ -185,7 +185,11 @@ static int da9052_gpio_to_irq(struct gpio_chip *gc, u32 offset) struct da9052_gpio *gpio = to_da9052_gpio(gc); struct da9052 *da9052 = gpio->da9052; - return da9052->irq_base + DA9052_IRQ_GPI0 + offset; + int irq; + + irq = regmap_irq_get_virq(da9052->irq_data, DA9052_IRQ_GPI0 + offset); + + return irq; } static struct gpio_chip reference_gp = { diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c index 6cc87ac8e01..6f2306db859 100644 --- a/drivers/gpio/gpio-ich.c +++ b/drivers/gpio/gpio-ich.c @@ -390,6 +390,7 @@ static int ichx_gpio_probe(struct platform_device *pdev) return -ENODEV; } + spin_lock_init(&ichx_priv.lock); res_base = platform_get_resource(pdev, IORESOURCE_IO, ICH_RES_GPIO); ichx_priv.use_gpio = ich_info->use_gpio; err = ichx_gpio_request_regions(res_base, pdev->name, diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c index d767b534c4a..7d9bd94be8d 100644 --- a/drivers/gpio/gpio-mvebu.c +++ b/drivers/gpio/gpio-mvebu.c @@ -41,7 +41,6 @@ #include <linux/io.h> #include <linux/of_irq.h> #include <linux/of_device.h> -#include <linux/platform_device.h> #include <linux/pinctrl/consumer.h> /* @@ -469,19 +468,6 @@ static void mvebu_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) } } -static struct platform_device_id mvebu_gpio_ids[] = { - { - .name = "orion-gpio", - }, { - .name = "mv78200-gpio", - }, { - .name = "armadaxp-gpio", - }, { - /* sentinel */ - }, -}; -MODULE_DEVICE_TABLE(platform, mvebu_gpio_ids); - static struct of_device_id mvebu_gpio_of_match[] = { { .compatible = "marvell,orion-gpio", @@ -555,9 +541,7 @@ static int mvebu_gpio_probe(struct platform_device *pdev) mvchip->chip.base = id * MVEBU_MAX_GPIO_PER_BANK; mvchip->chip.ngpio = ngpios; mvchip->chip.can_sleep = 0; -#ifdef CONFIG_OF mvchip->chip.of_node = np; -#endif spin_lock_init(&mvchip->lock); mvchip->membase = devm_request_and_ioremap(&pdev->dev, res); @@ -698,7 +682,6 @@ static struct platform_driver mvebu_gpio_driver = { .of_match_table = mvebu_gpio_of_match, }, .probe = mvebu_gpio_probe, - .id_table = mvebu_gpio_ids, }; static int __init mvebu_gpio_init(void) diff --git a/drivers/gpio/gpio-tps6586x.c b/drivers/gpio/gpio-tps6586x.c index c1b82da5650..29e8e750bd4 100644 --- a/drivers/gpio/gpio-tps6586x.c +++ b/drivers/gpio/gpio-tps6586x.c @@ -80,6 +80,14 @@ static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset, val, mask); } +static int tps6586x_gpio_to_irq(struct gpio_chip *gc, unsigned offset) +{ + struct tps6586x_gpio *tps6586x_gpio = to_tps6586x_gpio(gc); + + return tps6586x_irq_get_virq(tps6586x_gpio->parent, + TPS6586X_INT_PLDO_0 + offset); +} + static int tps6586x_gpio_probe(struct platform_device *pdev) { struct tps6586x_platform_data *pdata; @@ -106,6 +114,7 @@ static int tps6586x_gpio_probe(struct platform_device *pdev) tps6586x_gpio->gpio_chip.direction_output = tps6586x_gpio_output; tps6586x_gpio->gpio_chip.set = tps6586x_gpio_set; tps6586x_gpio->gpio_chip.get = tps6586x_gpio_get; + tps6586x_gpio->gpio_chip.to_irq = tps6586x_gpio_to_irq; #ifdef CONFIG_OF_GPIO tps6586x_gpio->gpio_chip.of_node = pdev->dev.parent->of_node; diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c index 00329f2fc05..9572aa137e6 100644 --- a/drivers/gpio/gpio-twl4030.c +++ b/drivers/gpio/gpio-twl4030.c @@ -355,13 +355,13 @@ static struct gpio_chip twl_gpiochip = { static int gpio_twl4030_pulls(u32 ups, u32 downs) { - u8 message[6]; + u8 message[5]; unsigned i, gpio_bit; /* For most pins, a pulldown was enabled by default. * We should have data that's specific to this board. */ - for (gpio_bit = 1, i = 1; i < 6; i++) { + for (gpio_bit = 1, i = 0; i < 5; i++) { u8 bit_mask; unsigned j; @@ -380,16 +380,16 @@ static int gpio_twl4030_pulls(u32 ups, u32 downs) static int gpio_twl4030_debounce(u32 debounce, u8 mmc_cd) { - u8 message[4]; + u8 message[3]; /* 30 msec of debouncing is always used for MMC card detect, * and is optional for everything else. */ - message[1] = (debounce & 0xff) | (mmc_cd & 0x03); + message[0] = (debounce & 0xff) | (mmc_cd & 0x03); debounce >>= 8; - message[2] = (debounce & 0xff); + message[1] = (debounce & 0xff); debounce >>= 8; - message[3] = (debounce & 0x03); + message[2] = (debounce & 0x03); return twl_i2c_write(TWL4030_MODULE_GPIO, message, REG_GPIO_DEBEN1, 3); diff --git a/drivers/gpio/gpio-viperboard.c b/drivers/gpio/gpio-viperboard.c new file mode 100644 index 00000000000..13772996cf2 --- /dev/null +++ b/drivers/gpio/gpio-viperboard.c @@ -0,0 +1,517 @@ +/* + * Nano River Technologies viperboard GPIO lib driver + * + * (C) 2012 by Lemonage GmbH + * Author: Lars Poeschel <poeschel@lemonage.de> + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/mutex.h> +#include <linux/platform_device.h> + +#include <linux/usb.h> +#include <linux/gpio.h> + +#include <linux/mfd/viperboard.h> + +#define VPRBRD_GPIOA_CLK_1MHZ 0 +#define VPRBRD_GPIOA_CLK_100KHZ 1 +#define VPRBRD_GPIOA_CLK_10KHZ 2 +#define VPRBRD_GPIOA_CLK_1KHZ 3 +#define VPRBRD_GPIOA_CLK_100HZ 4 +#define VPRBRD_GPIOA_CLK_10HZ 5 + +#define VPRBRD_GPIOA_FREQ_DEFAULT 1000 + +#define VPRBRD_GPIOA_CMD_CONT 0x00 +#define VPRBRD_GPIOA_CMD_PULSE 0x01 +#define VPRBRD_GPIOA_CMD_PWM 0x02 +#define VPRBRD_GPIOA_CMD_SETOUT 0x03 +#define VPRBRD_GPIOA_CMD_SETIN 0x04 +#define VPRBRD_GPIOA_CMD_SETINT 0x05 +#define VPRBRD_GPIOA_CMD_GETIN 0x06 + +#define VPRBRD_GPIOB_CMD_SETDIR 0x00 +#define VPRBRD_GPIOB_CMD_SETVAL 0x01 + +struct vprbrd_gpioa_msg { + u8 cmd; + u8 clk; + u8 offset; + u8 t1; + u8 t2; + u8 invert; + u8 pwmlevel; + u8 outval; + u8 risefall; + u8 answer; + u8 __fill; +} __packed; + +struct vprbrd_gpiob_msg { + u8 cmd; + u16 val; + u16 mask; +} __packed; + +struct vprbrd_gpio { + struct gpio_chip gpioa; /* gpio a related things */ + u32 gpioa_out; + u32 gpioa_val; + struct gpio_chip gpiob; /* gpio b related things */ + u32 gpiob_out; + u32 gpiob_val; + struct vprbrd *vb; +}; + +/* gpioa sampling clock module parameter */ +static unsigned char gpioa_clk; +static unsigned int gpioa_freq = VPRBRD_GPIOA_FREQ_DEFAULT; +module_param(gpioa_freq, uint, 0); +MODULE_PARM_DESC(gpioa_freq, + "gpio-a sampling freq in Hz (default is 1000Hz) valid values: 10, 100, 1000, 10000, 100000, 1000000"); + +/* ----- begin of gipo a chip -------------------------------------------- */ + +static int vprbrd_gpioa_get(struct gpio_chip *chip, + unsigned offset) +{ + int ret, answer, error = 0; + struct vprbrd_gpio *gpio = + container_of(chip, struct vprbrd_gpio, gpioa); + struct vprbrd *vb = gpio->vb; + struct vprbrd_gpioa_msg *gamsg = (struct vprbrd_gpioa_msg *)vb->buf; + + /* if io is set to output, just return the saved value */ + if (gpio->gpioa_out & (1 << offset)) + return gpio->gpioa_val & (1 << offset); + + mutex_lock(&vb->lock); + + gamsg->cmd = VPRBRD_GPIOA_CMD_GETIN; + gamsg->clk = 0x00; + gamsg->offset = offset; + gamsg->t1 = 0x00; + gamsg->t2 = 0x00; + gamsg->invert = 0x00; + gamsg->pwmlevel = 0x00; + gamsg->outval = 0x00; + 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); + if (ret != sizeof(struct vprbrd_gpioa_msg)) + error = -EREMOTEIO; + + ret = usb_control_msg(vb->usb_dev, usb_rcvctrlpipe(vb->usb_dev, 0), + VPRBRD_USB_REQUEST_GPIOA, VPRBRD_USB_TYPE_IN, 0x0000, + 0x0000, gamsg, sizeof(struct vprbrd_gpioa_msg), + VPRBRD_USB_TIMEOUT_MS); + answer = gamsg->answer & 0x01; + + mutex_unlock(&vb->lock); + + if (ret != sizeof(struct vprbrd_gpioa_msg)) + error = -EREMOTEIO; + + if (error) + return error; + + return answer; +} + +static void vprbrd_gpioa_set(struct gpio_chip *chip, + unsigned offset, int value) +{ + int ret; + struct vprbrd_gpio *gpio = + container_of(chip, struct vprbrd_gpio, gpioa); + 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->dev, "usb error setting pin value\n"); + } +} + +static int vprbrd_gpioa_direction_input(struct gpio_chip *chip, + unsigned offset) +{ + int ret; + struct vprbrd_gpio *gpio = + container_of(chip, struct vprbrd_gpio, gpioa); + struct vprbrd *vb = gpio->vb; + struct vprbrd_gpioa_msg *gamsg = (struct vprbrd_gpioa_msg *)vb->buf; + + gpio->gpioa_out &= ~(1 << offset); + + mutex_lock(&vb->lock); + + gamsg->cmd = VPRBRD_GPIOA_CMD_SETIN; + gamsg->clk = gpioa_clk; + gamsg->offset = offset; + gamsg->t1 = 0x00; + gamsg->t2 = 0x00; + gamsg->invert = 0x00; + gamsg->pwmlevel = 0x00; + gamsg->outval = 0x00; + 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)) + return -EREMOTEIO; + + return 0; +} + +static int vprbrd_gpioa_direction_output(struct gpio_chip *chip, + unsigned offset, int value) +{ + int ret; + struct vprbrd_gpio *gpio = + container_of(chip, struct vprbrd_gpio, gpioa); + struct vprbrd *vb = gpio->vb; + struct vprbrd_gpioa_msg *gamsg = (struct vprbrd_gpioa_msg *)vb->buf; + + 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)) + return -EREMOTEIO; + + return 0; +} + +/* ----- end of gpio a chip ---------------------------------------------- */ + +/* ----- begin of gipo b chip -------------------------------------------- */ + +static int vprbrd_gpiob_setdir(struct vprbrd *vb, unsigned offset, + unsigned dir) +{ + struct vprbrd_gpiob_msg *gbmsg = (struct vprbrd_gpiob_msg *)vb->buf; + int ret; + + gbmsg->cmd = VPRBRD_GPIOB_CMD_SETDIR; + gbmsg->val = cpu_to_be16(dir << offset); + gbmsg->mask = cpu_to_be16(0x0001 << offset); + + 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)) + return -EREMOTEIO; + + return 0; +} + +static int vprbrd_gpiob_get(struct gpio_chip *chip, + unsigned offset) +{ + int ret; + u16 val; + struct vprbrd_gpio *gpio = + container_of(chip, struct vprbrd_gpio, gpiob); + struct vprbrd *vb = gpio->vb; + struct vprbrd_gpiob_msg *gbmsg = (struct vprbrd_gpiob_msg *)vb->buf; + + /* if io is set to output, just return the saved value */ + if (gpio->gpiob_out & (1 << offset)) + return gpio->gpiob_val & (1 << offset); + + mutex_lock(&vb->lock); + + ret = usb_control_msg(vb->usb_dev, usb_rcvctrlpipe(vb->usb_dev, 0), + VPRBRD_USB_REQUEST_GPIOB, VPRBRD_USB_TYPE_IN, 0x0000, + 0x0000, gbmsg, sizeof(struct vprbrd_gpiob_msg), + VPRBRD_USB_TIMEOUT_MS); + val = gbmsg->val; + + mutex_unlock(&vb->lock); + + if (ret != sizeof(struct vprbrd_gpiob_msg)) + return ret; + + /* cache the read values */ + gpio->gpiob_val = be16_to_cpu(val); + + return (gpio->gpiob_val >> offset) & 0x1; +} + +static void vprbrd_gpiob_set(struct gpio_chip *chip, + unsigned offset, int value) +{ + int ret; + struct vprbrd_gpio *gpio = + container_of(chip, struct vprbrd_gpio, gpiob); + 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); + + mutex_lock(&vb->lock); + + gbmsg->cmd = VPRBRD_GPIOB_CMD_SETVAL; + gbmsg->val = cpu_to_be16(value << offset); + gbmsg->mask = cpu_to_be16(0x0001 << offset); + + 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); + + mutex_unlock(&vb->lock); + + if (ret != sizeof(struct vprbrd_gpiob_msg)) + dev_err(chip->dev, "usb error setting pin value\n"); + } +} + +static int vprbrd_gpiob_direction_input(struct gpio_chip *chip, + unsigned offset) +{ + int ret; + struct vprbrd_gpio *gpio = + container_of(chip, struct vprbrd_gpio, gpiob); + struct vprbrd *vb = gpio->vb; + + gpio->gpiob_out &= ~(1 << offset); + + mutex_lock(&vb->lock); + + ret = vprbrd_gpiob_setdir(vb, offset, 0); + + mutex_unlock(&vb->lock); + + if (ret) + dev_err(chip->dev, "usb error setting pin to input\n"); + + return ret; +} + +static int vprbrd_gpiob_direction_output(struct gpio_chip *chip, + unsigned offset, int value) +{ + int ret; + struct vprbrd_gpio *gpio = + container_of(chip, struct vprbrd_gpio, gpiob); + struct vprbrd *vb = gpio->vb; + + gpio->gpiob_out |= (1 << offset); + if (value) + gpio->gpiob_val |= (1 << offset); + else + gpio->gpiob_val &= ~(1 << offset); + + mutex_lock(&vb->lock); + + ret = vprbrd_gpiob_setdir(vb, offset, 1); + if (ret) + dev_err(chip->dev, "usb error setting pin to output\n"); + + mutex_unlock(&vb->lock); + + vprbrd_gpiob_set(chip, offset, value); + + return ret; +} + +/* ----- end of gpio b chip ---------------------------------------------- */ + +static int __devinit vprbrd_gpio_probe(struct platform_device *pdev) +{ + struct vprbrd *vb = dev_get_drvdata(pdev->dev.parent); + struct vprbrd_gpio *vb_gpio; + int ret; + + vb_gpio = devm_kzalloc(&pdev->dev, sizeof(*vb_gpio), GFP_KERNEL); + if (vb_gpio == NULL) + return -ENOMEM; + + vb_gpio->vb = vb; + /* registering gpio a */ + vb_gpio->gpioa.label = "viperboard gpio a"; + vb_gpio->gpioa.dev = &pdev->dev; + vb_gpio->gpioa.owner = THIS_MODULE; + vb_gpio->gpioa.base = -1; + vb_gpio->gpioa.ngpio = 16; + vb_gpio->gpioa.can_sleep = 1; + vb_gpio->gpioa.set = 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; + ret = gpiochip_add(&vb_gpio->gpioa); + if (ret < 0) { + dev_err(vb_gpio->gpioa.dev, "could not add gpio a"); + goto err_gpioa; + } + + /* registering gpio b */ + vb_gpio->gpiob.label = "viperboard gpio b"; + vb_gpio->gpiob.dev = &pdev->dev; + vb_gpio->gpiob.owner = THIS_MODULE; + vb_gpio->gpiob.base = -1; + vb_gpio->gpiob.ngpio = 16; + vb_gpio->gpiob.can_sleep = 1; + vb_gpio->gpiob.set = 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; + ret = gpiochip_add(&vb_gpio->gpiob); + if (ret < 0) { + dev_err(vb_gpio->gpiob.dev, "could not add gpio b"); + goto err_gpiob; + } + + platform_set_drvdata(pdev, vb_gpio); + + return ret; + +err_gpiob: + ret = gpiochip_remove(&vb_gpio->gpioa); + +err_gpioa: + return ret; +} + +static int __devexit 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); + + return ret; +} + +static struct platform_driver vprbrd_gpio_driver = { + .driver.name = "viperboard-gpio", + .driver.owner = THIS_MODULE, + .probe = vprbrd_gpio_probe, + .remove = __devexit_p(vprbrd_gpio_remove), +}; + +static int __init vprbrd_gpio_init(void) +{ + switch (gpioa_freq) { + case 1000000: + gpioa_clk = VPRBRD_GPIOA_CLK_1MHZ; + break; + case 100000: + gpioa_clk = VPRBRD_GPIOA_CLK_100KHZ; + break; + case 10000: + gpioa_clk = VPRBRD_GPIOA_CLK_10KHZ; + break; + case 1000: + gpioa_clk = VPRBRD_GPIOA_CLK_1KHZ; + break; + case 100: + gpioa_clk = VPRBRD_GPIOA_CLK_100HZ; + break; + case 10: + gpioa_clk = VPRBRD_GPIOA_CLK_10HZ; + break; + default: + pr_warn("invalid gpioa_freq (%d)\n", gpioa_freq); + gpioa_clk = VPRBRD_GPIOA_CLK_1KHZ; + } + + return platform_driver_register(&vprbrd_gpio_driver); +} +subsys_initcall(vprbrd_gpio_init); + +static void __exit vprbrd_gpio_exit(void) +{ + platform_driver_unregister(&vprbrd_gpio_driver); +} +module_exit(vprbrd_gpio_exit); + +MODULE_AUTHOR("Lars Poeschel <poeschel@lemonage.de>"); +MODULE_DESCRIPTION("GPIO driver for Nano River Techs Viperboard"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:viperboard-gpio"); |