Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754469Ab1F2NxV (ORCPT ); Wed, 29 Jun 2011 09:53:21 -0400 Received: from am1ehsobe006.messaging.microsoft.com ([213.199.154.209]:21457 "EHLO AM1EHSOBE006.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753927Ab1F2NxT (ORCPT ); Wed, 29 Jun 2011 09:53:19 -0400 X-SpamScore: 10 X-BigFish: VPS10(zzc8kzz1202h10d2nzz8275bhz32i2a8h668h839h62h) X-Spam-TCS-SCL: 1:0 X-Forefront-Antispam-Report: CIP:203.197.93.240;KIP:(null);UIP:(null);IPVD:NLI;H:Kcinpunhjhc01.kpit.com;RD:Kcinpunhjhc01.kpit.com;EFVD:NLI Subject: [PATCH 02/11] GPIO: DA9052 GPIO module v1 From: ashishj3 Reply-To: To: Mark Brown CC: , , Dajun Content-Type: text/plain; charset="UTF-8" Date: Wed, 29 Jun 2011 19:23:11 +0530 Message-ID: <1309355591.2344.4.camel@L-0532.kpit.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-OriginatorOrg: kpitcummins.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 10400 Lines: 368 DA9052 PMIC has 16 bit GPIO bus for peripheral control. This patch add support for the GPIO pins on the DA9052. Signed-off-by: David Dajun Chen Signed-off-by: Ashish Jangam CC: Mark Brown --- drivers/gpio/Kconfig | 6 + drivers/gpio/Makefile | 1 + drivers/gpio/da9052-gpio.c | 258 +++++++++++++++++++++++++++++++++++++++ include/linux/mfd/da9052/gpio.h | 47 +++++++ 4 files changed, 312 insertions(+), 0 deletions(-) create mode 100755 drivers/gpio/da9052-gpio.c create mode 100755 include/linux/mfd/da9052/gpio.h diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index d3b2953..7917b58 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -65,6 +65,12 @@ config GPIO_SYSFS # put expanders in the right section, in alphabetical order +config GPIO_DA9052 + bool "Dialog DA9052 GPIO" + depends on PMIC_DA9052 + help + Say yes here to enable the GPIO driver for the DA9052 chip. + config GPIO_MAX730X tristate diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index becef59..87748fc 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_GPIOLIB) += gpiolib.o obj-$(CONFIG_GPIO_ADP5520) += adp5520-gpio.o obj-$(CONFIG_GPIO_ADP5588) += adp5588-gpio.o obj-$(CONFIG_GPIO_BASIC_MMIO) += basic_mmio_gpio.o +obj-$(CONFIG_GPIO_DA9052) += da9052-gpio.o obj-$(CONFIG_GPIO_LANGWELL) += langwell_gpio.o obj-$(CONFIG_GPIO_MAX730X) += max730x.o obj-$(CONFIG_GPIO_MAX7300) += max7300.o diff --git a/drivers/gpio/da9052-gpio.c b/drivers/gpio/da9052-gpio.c new file mode 100755 index 0000000..3e1f854 --- /dev/null +++ b/drivers/gpio/da9052-gpio.c @@ -0,0 +1,258 @@ +/* + * GPIO Driver for Dialog DA9052 PMICs. + * + * Copyright(c) 2011 Dialog Semiconductor Ltd. + * + * Author: David Dajun Chen + * + * 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 +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +struct da9052_gpio { + struct da9052 *da9052; + struct gpio_chip gp; +}; + +static inline struct da9052_gpio *to_da9052_gpio(struct gpio_chip *chip) +{ + return container_of(chip, struct da9052_gpio, gp); +} + +static unsigned char da9052_gpio_port_odd(unsigned offset) +{ + return offset % 2; +} + +static int da9052_gpio_get(struct gpio_chip *gc, unsigned offset) +{ + struct da9052_gpio *gpio = to_da9052_gpio(gc); + int da9052_port_direction = 0; + int ret; + + ret = da9052_reg_read(gpio->da9052, + DA9052_GPIO_0_1_REG + (offset >> 1)); + if (ret < 0) + return ret; + + if (da9052_gpio_port_odd(offset)) { + da9052_port_direction = ret & DA9052_GPIO_ODD_PORT_PIN; + da9052_port_direction >>= 4; + } + else + da9052_port_direction = ret & DA9052_GPIO_EVEN_PORT_PIN; + + switch (da9052_port_direction) { + case DA9052_INPUT: + if (offset < DA9052_GPIO_MAX_PORTS_PER_REGISTER) + ret = da9052_reg_read(gpio->da9052, + DA9052_STATUS_C_REG); + else + ret = da9052_reg_read(gpio->da9052, + DA9052_STATUS_D_REG); + if (ret < 0) + return ret; + if (ret & (1 << DA9052_GPIO_SHIFT_COUNT(offset))) + return 1; + else + return 0; + case DA9052_OUTPUT_PUSHPULL: + if (da9052_gpio_port_odd(offset)) + return ret & DA9052_GPIO_ODD_PORT_MODE; + else + return ret & DA9052_GPIO_EVEN_PORT_MODE; + default: + return -EINVAL; + } +} + +static void da9052_gpio_set(struct gpio_chip *gc, unsigned offset, int value) +{ + struct da9052_gpio *gpio = to_da9052_gpio(gc); + unsigned char register_value = 0; + int ret; + + if (da9052_gpio_port_odd(offset)) { + if (value) { + register_value = DA9052_GPIO_ODD_PORT_MODE; + ret = da9052_reg_update(gpio->da9052, (offset >> 1) + + DA9052_GPIO_0_1_REG, + DA9052_GPIO_ODD_PORT_MODE, + register_value); + if (ret != 0) + dev_err(gpio->da9052->dev, + "Failed to updated gpio odd reg,%d", + ret); + } + } else { + if (value) { + register_value = DA9052_GPIO_EVEN_PORT_MODE; + ret = da9052_reg_update(gpio->da9052, (offset >> 1) + + DA9052_GPIO_0_1_REG, + DA9052_GPIO_EVEN_PORT_MODE, + register_value); + if (ret != 0) + dev_err(gpio->da9052->dev, + "Failed to updated gpio even reg,%d", + ret); + } + } +} + +static int da9052_gpio_direction_input(struct gpio_chip *gc, unsigned offset) +{ + struct da9052_gpio *gpio = to_da9052_gpio(gc); + unsigned char register_value; + int ret; + + /* Format: function - 2 bits type - 1 bit mode - 1 bit */ + register_value = DA9052_INPUT | DA9052_ACTIVE_LOW << 2 | + DA9052_DEBOUNCING_ON << 3; + + if (da9052_gpio_port_odd(offset)) + ret = da9052_reg_update(gpio->da9052, (offset >> 1) + + DA9052_GPIO_0_1_REG, + DA9052_GPIO_MASK_UPPER_NIBBLE, + (register_value << + DA9052_GPIO_NIBBLE_SHIFT)); + else + ret = da9052_reg_update(gpio->da9052, (offset >> 1) + + DA9052_GPIO_0_1_REG, + DA9052_GPIO_MASK_LOWER_NIBBLE, + register_value); + + return ret; +} + +static int da9052_gpio_direction_output(struct gpio_chip *gc, + unsigned offset, int value) +{ + struct da9052_gpio *gpio = to_da9052_gpio(gc); + unsigned char register_value; + int ret; + + /* Format: Function - 2 bits Type - 1 bit Mode - 1 bit */ + register_value = DA9052_OUTPUT_PUSHPULL | DA9052_SUPPLY_VDD_IO1 << 2 | + value << 3; + + if (da9052_gpio_port_odd(offset)) + ret = da9052_reg_update(gpio->da9052, (offset >> 1) + + DA9052_GPIO_0_1_REG, + DA9052_GPIO_MASK_UPPER_NIBBLE, + (register_value << + DA9052_GPIO_NIBBLE_SHIFT)); + else + ret = da9052_reg_update(gpio->da9052, (offset >> 1) + + DA9052_GPIO_0_1_REG, + DA9052_GPIO_MASK_LOWER_NIBBLE, + register_value); + + return ret; +} + +static int da9052_gpio_to_irq(struct gpio_chip *gc, u32 offset) +{ + struct da9052_gpio *gpio; + gpio = to_da9052_gpio(gc); + + return gpio->gp.base + offset; +} + +static int __devinit da9052_gpio_probe(struct platform_device *pdev) +{ + struct da9052_gpio *gpio; + struct da9052_pdata *pdata; + int ret; + + gpio = kzalloc(sizeof(*gpio), GFP_KERNEL); + if (gpio == NULL) + return -ENOMEM; + + gpio->da9052 = dev_get_drvdata(pdev->dev.parent); + pdata = gpio->da9052->dev->platform_data; + + if (pdata == NULL) { + dev_err(&pdev->dev, "Failed no platform data for GPIO\n"); + ret = -ENOMEM; + goto err_mem; + } + + gpio->da9052 = dev_get_drvdata(pdev->dev.parent); + gpio->gp.get = da9052_gpio_get; + gpio->gp.set = da9052_gpio_set; + gpio->gp.base = pdata->gpio_base; + gpio->gp.ngpio = pdata->num_gpio; + gpio->gp.can_sleep = 1; + gpio->gp.to_irq = da9052_gpio_to_irq; + gpio->gp.dev = &pdev->dev; + gpio->gp.owner = THIS_MODULE; + gpio->gp.label = "da9052-gpio"; + gpio->gp.direction_input = da9052_gpio_direction_input; + gpio->gp.direction_output = da9052_gpio_direction_output; + + ret = gpiochip_add(&gpio->gp); + if (ret < 0) { + dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); + goto err_mem; + } + platform_set_drvdata(pdev, gpio); + + return 0; + +err_mem: + kfree(gpio); + return ret; +} + +static int __devexit da9052_gpio_remove(struct platform_device *pdev) +{ + struct da9052_gpio *gpio = platform_get_drvdata(pdev); + int ret; + + ret = gpiochip_remove(&gpio->gp); + if (ret == 0) + kfree(gpio); + + return ret; +} + +static struct platform_driver da9052_gpio_driver = { + .probe = da9052_gpio_probe, + .remove = __devexit_p(da9052_gpio_remove), + .driver = { + .name = "da9052-gpio", + .owner = THIS_MODULE, + }, +}; + +static int __init da9052_gpio_init(void) +{ + return platform_driver_register(&da9052_gpio_driver); +} +module_init(da9052_gpio_init); + +static void __exit da9052_gpio_exit(void) +{ + return platform_driver_unregister(&da9052_gpio_driver); +} +module_exit(da9052_gpio_exit); + +MODULE_AUTHOR("David Dajun Chen "); +MODULE_DESCRIPTION("DA9052 GPIO Device Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9052-gpio"); diff --git a/include/linux/mfd/da9052/gpio.h b/include/linux/mfd/da9052/gpio.h new file mode 100755 index 0000000..ff579bf --- /dev/null +++ b/include/linux/mfd/da9052/gpio.h @@ -0,0 +1,47 @@ +/* + * GPIO declarations for DA9052 PMICs. + * + * Copyright(c) 2011 Dialog Semiconductor Ltd. + * + * Author: David Dajun Chen + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#ifndef __LINUX_MFD_DA9052_GPIO_H +#define __LINUX_MFD_DA9052_GPIO_H + +#define DA9052_INPUT 1 +#define DA9052_OUTPUT_OPENDRAIN 2 +#define DA9052_OUTPUT_PUSHPULL 3 + +#define DA9052_SUPPLY_VDD_IO1 0 + +#define DA9052_DEBOUNCING_OFF 0 +#define DA9052_DEBOUNCING_ON 1 + +#define DA9052_OUTPUT_LOWLEVEL 0 + +#define DA9052_ACTIVE_LOW 0 +#define DA9052_ACTIVE_HIGH 1 + +#define DA9052_GPIO_MAX_PORTS_PER_REGISTER 8 +#define DA9052_GPIO_SHIFT_COUNT(no) (no%8) +#define DA9052_GPIO_MASK_UPPER_NIBBLE 0xF0 +#define DA9052_GPIO_MASK_LOWER_NIBBLE 0x0F +#define DA9052_GPIO_NIBBLE_SHIFT 4 + +#endif -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/