From 4cf8e53b3b55fa2f9b2a6b9c3e557b649adf7c6a Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Tue, 22 Sep 2009 16:46:35 -0700 Subject: [PATCH] mfd/gpio: add a GPIO interface to the UCB1400 MFD chip driver via gpiolib Cc: Eric Miao Cc: Russell King Cc: David Brownell Cc: Samuel Ortiz Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/gpio/Kconfig | 12 ++++ drivers/gpio/Makefile | 1 + drivers/gpio/ucb1400_gpio.c | 125 ++++++++++++++++++++++++++++++++++++ drivers/mfd/ucb1400_core.c | 31 +++++++-- include/linux/ucb1400.h | 19 ++++++ 5 files changed, 184 insertions(+), 4 deletions(-) create mode 100644 drivers/gpio/ucb1400_gpio.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 223e7c92fd5..ccca08e0b59 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -202,4 +202,16 @@ config GPIO_MC33880 SPI driver for Freescale MC33880 high-side/low-side switch. This provides GPIO interface supporting inputs and outputs. +comment "AC97 GPIO expanders:" + +config GPIO_UCB1400 + bool "Philips UCB1400 GPIO" + depends on UCB1400_CORE + help + This enables support for the Philips UCB1400 GPIO pins. + The UCB1400 is an AC97 audio codec. + + To compile this driver as a module, choose M here: the + module will be called ucb1400_gpio. + endif diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index f35de16c7c4..c1ac034698c 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -12,6 +12,7 @@ obj-$(CONFIG_GPIO_PCA953X) += pca953x.o obj-$(CONFIG_GPIO_PCF857X) += pcf857x.o obj-$(CONFIG_GPIO_PL061) += pl061.o obj-$(CONFIG_GPIO_TWL4030) += twl4030-gpio.o +obj-$(CONFIG_GPIO_UCB1400) += ucb1400_gpio.o obj-$(CONFIG_GPIO_XILINX) += xilinx_gpio.o obj-$(CONFIG_GPIO_BT8XX) += bt8xxgpio.o obj-$(CONFIG_GPIO_VR41XX) += vr41xx_giu.o diff --git a/drivers/gpio/ucb1400_gpio.c b/drivers/gpio/ucb1400_gpio.c new file mode 100644 index 00000000000..50e6bd1392c --- /dev/null +++ b/drivers/gpio/ucb1400_gpio.c @@ -0,0 +1,125 @@ +/* + * Philips UCB1400 GPIO driver + * + * Author: Marek Vasut + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include +#include + +struct ucb1400_gpio_data *ucbdata; + +static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off) +{ + struct ucb1400_gpio *gpio; + gpio = container_of(gc, struct ucb1400_gpio, gc); + ucb1400_gpio_set_direction(gpio->ac97, off, 0); + return 0; +} + +static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val) +{ + struct ucb1400_gpio *gpio; + gpio = container_of(gc, struct ucb1400_gpio, gc); + ucb1400_gpio_set_direction(gpio->ac97, off, 1); + ucb1400_gpio_set_value(gpio->ac97, off, val); + return 0; +} + +static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off) +{ + struct ucb1400_gpio *gpio; + gpio = container_of(gc, struct ucb1400_gpio, gc); + return ucb1400_gpio_get_value(gpio->ac97, off); +} + +static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val) +{ + struct ucb1400_gpio *gpio; + gpio = container_of(gc, struct ucb1400_gpio, gc); + ucb1400_gpio_set_value(gpio->ac97, off, val); +} + +static int ucb1400_gpio_probe(struct platform_device *dev) +{ + struct ucb1400_gpio *ucb = dev->dev.platform_data; + int err = 0; + + if (!(ucbdata && ucbdata->gpio_offset)) { + err = -EINVAL; + goto err; + } + + platform_set_drvdata(dev, ucb); + + ucb->gc.label = "ucb1400_gpio"; + ucb->gc.base = ucbdata->gpio_offset; + ucb->gc.ngpio = 10; + ucb->gc.owner = THIS_MODULE; + + ucb->gc.direction_input = ucb1400_gpio_dir_in; + ucb->gc.direction_output = ucb1400_gpio_dir_out; + ucb->gc.get = ucb1400_gpio_get; + ucb->gc.set = ucb1400_gpio_set; + ucb->gc.can_sleep = 1; + + err = gpiochip_add(&ucb->gc); + if (err) + goto err; + + if (ucbdata && ucbdata->gpio_setup) + err = ucbdata->gpio_setup(&dev->dev, ucb->gc.ngpio); + +err: + return err; + +} + +static int ucb1400_gpio_remove(struct platform_device *dev) +{ + int err = 0; + struct ucb1400_gpio *ucb = platform_get_drvdata(dev); + + if (ucbdata && ucbdata->gpio_teardown) { + err = ucbdata->gpio_teardown(&dev->dev, ucb->gc.ngpio); + if (err) + return err; + } + + err = gpiochip_remove(&ucb->gc); + return err; +} + +static struct platform_driver ucb1400_gpio_driver = { + .probe = ucb1400_gpio_probe, + .remove = ucb1400_gpio_remove, + .driver = { + .name = "ucb1400_gpio" + }, +}; + +static int __init ucb1400_gpio_init(void) +{ + return platform_driver_register(&ucb1400_gpio_driver); +} + +static void __exit ucb1400_gpio_exit(void) +{ + platform_driver_unregister(&ucb1400_gpio_driver); +} + +void __init ucb1400_gpio_set_data(struct ucb1400_gpio_data *data) +{ + ucbdata = data; +} + +module_init(ucb1400_gpio_init); +module_exit(ucb1400_gpio_exit); + +MODULE_DESCRIPTION("Philips UCB1400 GPIO driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/mfd/ucb1400_core.c b/drivers/mfd/ucb1400_core.c index 78c2135c5de..2afc08006e6 100644 --- a/drivers/mfd/ucb1400_core.c +++ b/drivers/mfd/ucb1400_core.c @@ -48,9 +48,11 @@ static int ucb1400_core_probe(struct device *dev) int err; struct ucb1400 *ucb; struct ucb1400_ts ucb_ts; + struct ucb1400_gpio ucb_gpio; struct snd_ac97 *ac97; memset(&ucb_ts, 0, sizeof(ucb_ts)); + memset(&ucb_gpio, 0, sizeof(ucb_gpio)); ucb = kzalloc(sizeof(struct ucb1400), GFP_KERNEL); if (!ucb) { @@ -68,25 +70,44 @@ static int ucb1400_core_probe(struct device *dev) goto err0; } + /* GPIO */ + ucb_gpio.ac97 = ac97; + ucb->ucb1400_gpio = platform_device_alloc("ucb1400_gpio", -1); + if (!ucb->ucb1400_gpio) { + err = -ENOMEM; + goto err0; + } + err = platform_device_add_data(ucb->ucb1400_gpio, &ucb_gpio, + sizeof(ucb_gpio)); + if (err) + goto err1; + err = platform_device_add(ucb->ucb1400_gpio); + if (err) + goto err1; + /* TOUCHSCREEN */ ucb_ts.ac97 = ac97; ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1); if (!ucb->ucb1400_ts) { err = -ENOMEM; - goto err0; + goto err2; } err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts, sizeof(ucb_ts)); if (err) - goto err1; + goto err3; err = platform_device_add(ucb->ucb1400_ts); if (err) - goto err1; + goto err3; return 0; -err1: +err3: platform_device_put(ucb->ucb1400_ts); +err2: + platform_device_unregister(ucb->ucb1400_gpio); +err1: + platform_device_put(ucb->ucb1400_gpio); err0: kfree(ucb); err: @@ -98,6 +119,8 @@ static int ucb1400_core_remove(struct device *dev) struct ucb1400 *ucb = dev_get_drvdata(dev); platform_device_unregister(ucb->ucb1400_ts); + platform_device_unregister(ucb->ucb1400_gpio); + kfree(ucb); return 0; } diff --git a/include/linux/ucb1400.h b/include/linux/ucb1400.h index ae779bb8cc0..adb44066680 100644 --- a/include/linux/ucb1400.h +++ b/include/linux/ucb1400.h @@ -26,6 +26,7 @@ #include #include #include +#include /* * UCB1400 AC-link registers @@ -82,6 +83,17 @@ #define UCB_ID 0x7e #define UCB_ID_1400 0x4304 +struct ucb1400_gpio_data { + int gpio_offset; + int (*gpio_setup)(struct device *dev, int ngpio); + int (*gpio_teardown)(struct device *dev, int ngpio); +}; + +struct ucb1400_gpio { + struct gpio_chip gc; + struct snd_ac97 *ac97; +}; + struct ucb1400_ts { struct input_dev *ts_idev; struct task_struct *ts_task; @@ -95,6 +107,7 @@ struct ucb1400_ts { struct ucb1400 { struct platform_device *ucb1400_ts; + struct platform_device *ucb1400_gpio; }; static inline u16 ucb1400_reg_read(struct snd_ac97 *ac97, u16 reg) @@ -147,4 +160,10 @@ static inline void ucb1400_adc_disable(struct snd_ac97 *ac97) unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel, int adcsync); +#ifdef CONFIG_GPIO_UCB1400 +void __init ucb1400_gpio_set_data(struct ucb1400_gpio_data *data); +#else +static inline void ucb1400_gpio_set_data(struct ucb1400_gpio_data *data) {} +#endif + #endif