Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753077Ab1CHGLe (ORCPT ); Tue, 8 Mar 2011 01:11:34 -0500 Received: from wolverine02.qualcomm.com ([199.106.114.251]:56275 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751413Ab1CHGLc (ORCPT ); Tue, 8 Mar 2011 01:11:32 -0500 X-IronPort-AV: E=McAfee;i="5400,1158,6278"; a="78415118" From: adharmap@codeaurora.org To: davidb@codeaurora.org Cc: "David S. Miller" , Abhijeet Dharmapurikar , Andrew Morton , Bryan Huntsman , Daniel Walker , David Collins , Grant Likely , Greg Kroah-Hartman , Joe Perches , Russell King , Samuel Ortiz , Stepan Moskovchenko , Mark Brown , Linus Walleij , Thomas Glexiner , linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [Qualcomm PM8921 MFD v2 3/6] gpio: pm8xxx-gpio: Add pm8xxx gpio driver Date: Mon, 7 Mar 2011 22:09:47 -0800 Message-Id: <1299564590-30116-4-git-send-email-adharmap@codeaurora.org> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1299564590-30116-1-git-send-email-adharmap@codeaurora.org> References: <1299564590-30116-1-git-send-email-adharmap@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 20648 Lines: 731 From: Abhijeet Dharmapurikar Add support for GPIO on Qualcomm PM8xxx PMIC chips. Signed-off-by: Abhijeet Dharmapurikar --- drivers/gpio/Kconfig | 10 + drivers/gpio/Makefile | 1 + drivers/gpio/pm8xxx-gpio.c | 451 +++++++++++++++++++++++++++++++++++++++ drivers/mfd/pm8921-core.c | 34 +++ include/linux/mfd/pm8921.h | 11 + include/linux/mfd/pm8xxx/gpio.h | 132 ++++++++++++ 6 files changed, 639 insertions(+), 0 deletions(-) create mode 100644 drivers/gpio/pm8xxx-gpio.c create mode 100644 include/linux/mfd/pm8xxx/gpio.h diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 664660e..c5e6f51 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -411,4 +411,14 @@ config GPIO_JANZ_TTL This driver provides support for driving the pins in output mode only. Input mode is not supported. +comment "SSBI GPIO expanders:" + +config GPIO_PM8XXX + tristate "Qualcomm PM8xxx GPIO support" + depends on MFD_PM8XXX + default y if MFD_PM8XXX + help + This option enables support for on-chip GPIO found on Qualcomm PM8xxx + PMICs. + endif diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 3351cf8..10efe6c 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -42,3 +42,4 @@ obj-$(CONFIG_GPIO_JANZ_TTL) += janz-ttl.o obj-$(CONFIG_GPIO_SX150X) += sx150x.o obj-$(CONFIG_GPIO_VX855) += vx855_gpio.o obj-$(CONFIG_GPIO_ML_IOH) += ml_ioh_gpio.o +obj-$(CONFIG_GPIO_PM8XXX) += pm8xxx-gpio.o diff --git a/drivers/gpio/pm8xxx-gpio.c b/drivers/gpio/pm8xxx-gpio.c new file mode 100644 index 0000000..d9c246b --- /dev/null +++ b/drivers/gpio/pm8xxx-gpio.c @@ -0,0 +1,451 @@ +/* Copyright (c) 2011, Code Aurora Forum. 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 version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. + */ + +/* + * Qualcomm PMIC8XXX GPIO driver + * + */ + +#define pr_fmt(fmt) "%s: " fmt, __func__ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* GPIO registers */ +#define SSBI_REG_ADDR_GPIO_BASE 0x150 +#define SSBI_REG_ADDR_GPIO(n) (SSBI_REG_ADDR_GPIO_BASE + n) + +/* GPIO */ +#define PM_GPIO_BANK_MASK 0x70 +#define PM_GPIO_BANK_SHIFT 4 +#define PM_GPIO_WRITE 0x80 + +/* Bank 0 */ +#define PM_GPIO_VIN_MASK 0x0E +#define PM_GPIO_VIN_SHIFT 1 +#define PM_GPIO_MODE_ENABLE 0x01 + +/* Bank 1 */ +#define PM_GPIO_MODE_MASK 0x0C +#define PM_GPIO_MODE_SHIFT 2 +#define PM_GPIO_OUT_BUFFER 0x02 +#define PM_GPIO_OUT_INVERT 0x01 + +#define PM_GPIO_MODE_OFF 3 +#define PM_GPIO_MODE_OUTPUT 2 +#define PM_GPIO_MODE_INPUT 0 +#define PM_GPIO_MODE_BOTH 1 + +/* Bank 2 */ +#define PM_GPIO_PULL_MASK 0x0E +#define PM_GPIO_PULL_SHIFT 1 + +/* Bank 3 */ +#define PM_GPIO_OUT_STRENGTH_MASK 0x0C +#define PM_GPIO_OUT_STRENGTH_SHIFT 2 + +/* Bank 4 */ +#define PM_GPIO_FUNC_MASK 0x0E +#define PM_GPIO_FUNC_SHIFT 1 + +/* Bank 5 */ +#define PM_GPIO_NON_INT_POL_INV 0x08 +#define PM_GPIO_BANKS 6 + +struct pm_gpio_chip { + struct list_head link; + struct gpio_chip gpio_chip; + struct mutex pm_lock; + u8 *bank1; + int irq_base; +}; + +static LIST_HEAD(pm_gpio_chips); + +static int pm_gpio_get(struct pm_gpio_chip *pm_gpio_chip, unsigned gpio) +{ + int mode; + + if (gpio >= pm_gpio_chip->gpio_chip.ngpio || pm_gpio_chip == NULL) + return -EINVAL; + + /* Get gpio value from config bank 1 if output gpio. + Get gpio value from IRQ RT status register for all other gpio modes. + */ + mode = (pm_gpio_chip->bank1[gpio] & PM_GPIO_MODE_MASK) >> + PM_GPIO_MODE_SHIFT; + if (mode == PM_GPIO_MODE_OUTPUT) + return pm_gpio_chip->bank1[gpio] & PM_GPIO_OUT_INVERT; + else + return pm8xxx_read_irq_stat(pm_gpio_chip->gpio_chip.dev->parent, + pm_gpio_chip->irq_base + gpio); +} + +static int pm_gpio_set(struct pm_gpio_chip *pm_gpio_chip, + unsigned gpio, int value) +{ + int rc; + u8 bank1; + + if (gpio >= pm_gpio_chip->gpio_chip.ngpio || pm_gpio_chip == NULL) + return -EINVAL; + + mutex_lock(&pm_gpio_chip->pm_lock); + bank1 = PM_GPIO_WRITE + | (pm_gpio_chip->bank1[gpio] & ~PM_GPIO_OUT_INVERT); + + if (value) + bank1 |= PM_GPIO_OUT_INVERT; + + pm_gpio_chip->bank1[gpio] = bank1; + rc = pm8xxx_writeb(pm_gpio_chip->gpio_chip.dev->parent, + SSBI_REG_ADDR_GPIO(gpio), bank1); + mutex_unlock(&pm_gpio_chip->pm_lock); + + if (rc) + pr_err("FAIL pm8xxx_writeb(): rc=%d. " + "(gpio=%d, value=%d)\n", + rc, gpio, value); + + return rc; +} + +static int dir_map[] = { + PM_GPIO_MODE_OFF, + PM_GPIO_MODE_OUTPUT, + PM_GPIO_MODE_INPUT, + PM_GPIO_MODE_BOTH, +}; + +static int pm_gpio_set_direction(struct pm_gpio_chip *pm_gpio_chip, + unsigned gpio, int direction) +{ + int rc; + u8 bank1; + + if (!direction || pm_gpio_chip == NULL) + return -EINVAL; + + mutex_lock(&pm_gpio_chip->pm_lock); + bank1 = PM_GPIO_WRITE + | (pm_gpio_chip->bank1[gpio] & ~PM_GPIO_MODE_MASK); + + bank1 |= ((dir_map[direction] << PM_GPIO_MODE_SHIFT) + & PM_GPIO_MODE_MASK); + + pm_gpio_chip->bank1[gpio] = bank1; + rc = pm8xxx_writeb(pm_gpio_chip->gpio_chip.dev->parent, + SSBI_REG_ADDR_GPIO(gpio), bank1); + mutex_unlock(&pm_gpio_chip->pm_lock); + + if (rc) + pr_err("Failed on pm8xxx_writeb(): rc=%d (GPIO config)\n", + rc); + + return rc; +} + +static int pm_gpio_init_bank1(struct pm_gpio_chip *pm_gpio_chip) +{ + int i, rc; + u8 bank; + + for (i = 0; i < pm_gpio_chip->gpio_chip.ngpio; i++) { + bank = 1 << PM_GPIO_BANK_SHIFT; + rc = pm8xxx_writeb(pm_gpio_chip->gpio_chip.dev->parent, + SSBI_REG_ADDR_GPIO(i), + bank); + if (rc) { + pr_err("error setting bank rc=%d\n", rc); + return rc; + } + + rc = pm8xxx_readb(pm_gpio_chip->gpio_chip.dev->parent, + SSBI_REG_ADDR_GPIO(i), + &pm_gpio_chip->bank1[i]); + if (rc) { + pr_err("error reading bank 1 rc=%d\n", rc); + return rc; + } + } + return 0; +} + +static int pm_gpio_to_irq(struct gpio_chip *gpio_chip, unsigned offset) +{ + struct pm_gpio_chip *pm_gpio_chip = dev_get_drvdata(gpio_chip->dev); + + return pm_gpio_chip->irq_base + offset; +} + +static int pm_gpio_read(struct gpio_chip *gpio_chip, unsigned offset) +{ + struct pm_gpio_chip *pm_gpio_chip = dev_get_drvdata(gpio_chip->dev); + + return pm_gpio_get(pm_gpio_chip, offset); +} + +static void pm_gpio_write(struct gpio_chip *gpio_chip, + unsigned offset, int val) +{ + struct pm_gpio_chip *pm_gpio_chip = dev_get_drvdata(gpio_chip->dev); + + pm_gpio_set(pm_gpio_chip, offset, val); +} + +static int pm_gpio_direction_input(struct gpio_chip *gpio_chip, + unsigned offset) +{ + struct pm_gpio_chip *pm_gpio_chip = dev_get_drvdata(gpio_chip->dev); + + return pm_gpio_set_direction(pm_gpio_chip, offset, PM_GPIO_DIR_IN); +} + +static int pm_gpio_direction_output(struct gpio_chip *gpio_chip, + unsigned offset, + int val) +{ + int ret; + struct pm_gpio_chip *pm_gpio_chip = dev_get_drvdata(gpio_chip->dev); + + ret = pm_gpio_set_direction(pm_gpio_chip, offset, PM_GPIO_DIR_OUT); + if (!ret) + ret = pm_gpio_set(pm_gpio_chip, offset, val); + + return ret; +} + +static void pm_gpio_dbg_show(struct seq_file *s, struct gpio_chip *gpio_chip) +{ + static const char * const cmode[] = { "in", "in/out", "out", "off" }; + struct pm_gpio_chip *pm_gpio_chip = dev_get_drvdata(gpio_chip->dev); + u8 mode, state, bank; + const char *label; + int i, j; + + for (i = 0; i < gpio_chip->ngpio; i++) { + label = gpiochip_is_requested(gpio_chip, i); + mode = (pm_gpio_chip->bank1[i] & PM_GPIO_MODE_MASK) >> + PM_GPIO_MODE_SHIFT; + state = pm_gpio_get(pm_gpio_chip, i); + seq_printf(s, "gpio-%-3d (%-12.12s) %-10.10s" + " %s", + gpio_chip->base + i, + label ? label : "--", + cmode[mode], + state ? "hi" : "lo"); + for (j = 0; j < PM_GPIO_BANKS; j++) { + bank = j << PM_GPIO_BANK_SHIFT; + pm8xxx_writeb(gpio_chip->dev->parent, + SSBI_REG_ADDR_GPIO(i), + bank); + pm8xxx_readb(gpio_chip->dev->parent, + SSBI_REG_ADDR_GPIO(i), + &bank); + seq_printf(s, " 0x%02x", bank); + } + seq_printf(s, "\n"); + } +} + +static int __devinit pm_gpio_probe(struct platform_device *pdev) +{ + int ret; + const struct pm8xxx_gpio_platform_data *pdata = pdev->dev.platform_data; + struct pm_gpio_chip *pm_gpio_chip; + + if (!pdata) { + pr_err("missing platform data\n"); + ret = -EINVAL; + goto out; + } + + pm_gpio_chip = kzalloc(sizeof(struct pm_gpio_chip), GFP_KERNEL); + if (!pm_gpio_chip) { + pr_err("Cannot allocate pm_gpio_chip\n"); + ret = -ENOMEM; + goto out; + } + + pm_gpio_chip->bank1 = kzalloc(sizeof(u8) * pdata->gpio_cdata.ngpios, + GFP_KERNEL); + if (!pm_gpio_chip->bank1) { + pr_err("Cannot allocate pm_gpio_chip->bank1\n"); + ret = -ENOMEM; + goto out; + } + + mutex_init(&pm_gpio_chip->pm_lock); + pm_gpio_chip->gpio_chip.label = "pm-gpio"; + pm_gpio_chip->gpio_chip.direction_input = pm_gpio_direction_input; + pm_gpio_chip->gpio_chip.direction_output = pm_gpio_direction_output; + pm_gpio_chip->gpio_chip.to_irq = pm_gpio_to_irq; + pm_gpio_chip->gpio_chip.get = pm_gpio_read; + pm_gpio_chip->gpio_chip.set = pm_gpio_write; + pm_gpio_chip->gpio_chip.dbg_show = pm_gpio_dbg_show; + pm_gpio_chip->gpio_chip.ngpio = pdata->gpio_cdata.ngpios; + pm_gpio_chip->gpio_chip.can_sleep = 1; + pm_gpio_chip->gpio_chip.dev = &pdev->dev; + pm_gpio_chip->gpio_chip.base = pdata->gpio_base; + pm_gpio_chip->irq_base = platform_get_irq(pdev, 0); + list_add(&pm_gpio_chip->link, &pm_gpio_chips); + platform_set_drvdata(pdev, pm_gpio_chip); + + ret = gpiochip_add(&pm_gpio_chip->gpio_chip); + if (ret) { + pr_err("gpiochip_add failed ret = %d\n", ret); + goto reset_drvdata; + } + + ret = pm_gpio_init_bank1(pm_gpio_chip); + if (ret) { + pr_err("gpio init bank failed ret = %d\n", ret); + goto remove_chip; + } + + return 0; + +remove_chip: + if (gpiochip_remove(&pm_gpio_chip->gpio_chip)) + pr_err("failed to remove gpio chip\n"); +reset_drvdata: + platform_set_drvdata(pdev, NULL); + mutex_destroy(&pm_gpio_chip->pm_lock); + kfree(pm_gpio_chip); +out: + return ret; +} + +static int __devexit pm_gpio_remove(struct platform_device *pdev) +{ + struct pm_gpio_chip *pm_gpio_chip + = platform_get_drvdata(pdev); + + platform_set_drvdata(pdev, NULL); + if (gpiochip_remove(&pm_gpio_chip->gpio_chip)) + pr_err("failed to remove gpio chip\n"); + mutex_destroy(&pm_gpio_chip->pm_lock); + kfree(pm_gpio_chip->bank1); + kfree(pm_gpio_chip); + return 0; +} + +int pm8xxx_gpio_config(int gpio, struct pm_gpio *param) +{ + int rc; + u8 bank[8]; + struct pm_gpio_chip *pm_gpio_chip; + struct gpio_chip *gpio_chip; + int pm_gpio; + int found = 0; + + if (param == NULL) + return -EINVAL; + list_for_each_entry(pm_gpio_chip, &pm_gpio_chips, link) { + gpio_chip = &pm_gpio_chip->gpio_chip; + if (gpio >= gpio_chip->base + && gpio < gpio_chip->base + gpio_chip->ngpio) { + found = 1; + pm_gpio = gpio - gpio_chip->base; + break; + } + } + if (!found) { + pr_err("called on gpio %d not handled by any pmic\n", gpio); + return -EINVAL; + } + + /* Select banks and configure the gpio */ + bank[0] = PM_GPIO_WRITE | + ((param->vin_sel << PM_GPIO_VIN_SHIFT) & + PM_GPIO_VIN_MASK) | + PM_GPIO_MODE_ENABLE; + bank[1] = PM_GPIO_WRITE | + ((1 << PM_GPIO_BANK_SHIFT) & + PM_GPIO_BANK_MASK) | + ((dir_map[param->direction] << + PM_GPIO_MODE_SHIFT) & + PM_GPIO_MODE_MASK) | + ((param->direction & PM_GPIO_DIR_OUT) ? + ((param->output_buffer & 1) ? + PM_GPIO_OUT_BUFFER : 0) : 0) | + ((param->direction & PM_GPIO_DIR_OUT) ? + param->output_value & 0x01 : 0); + bank[2] = PM_GPIO_WRITE | + ((2 << PM_GPIO_BANK_SHIFT) & + PM_GPIO_BANK_MASK) | + ((param->pull << PM_GPIO_PULL_SHIFT) & + PM_GPIO_PULL_MASK); + bank[3] = PM_GPIO_WRITE | + ((3 << PM_GPIO_BANK_SHIFT) & + PM_GPIO_BANK_MASK) | + ((param->out_strength << + PM_GPIO_OUT_STRENGTH_SHIFT) & + PM_GPIO_OUT_STRENGTH_MASK); + bank[4] = PM_GPIO_WRITE | + ((4 << PM_GPIO_BANK_SHIFT) & + PM_GPIO_BANK_MASK) | + ((param->function << PM_GPIO_FUNC_SHIFT) & + PM_GPIO_FUNC_MASK); + bank[5] = PM_GPIO_WRITE | + ((5 << PM_GPIO_BANK_SHIFT) & PM_GPIO_BANK_MASK) | + (param->inv_int_pol ? 0 : PM_GPIO_NON_INT_POL_INV); + + mutex_lock(&pm_gpio_chip->pm_lock); + /* Remember bank1 for later use */ + pm_gpio_chip->bank1[pm_gpio] = bank[1]; + rc = pm8xxx_write_buf(pm_gpio_chip->gpio_chip.dev->parent, + SSBI_REG_ADDR_GPIO(pm_gpio), bank, 6); + mutex_unlock(&pm_gpio_chip->pm_lock); + + if (rc) + pr_err("Failed on pm8xxx_write_buf() rc=%d (GPIO config)\n", + rc); + + return rc; +} +EXPORT_SYMBOL(pm8xxx_gpio_config); + +static struct platform_driver pm_gpio_driver = { + .probe = pm_gpio_probe, + .remove = __devexit_p(pm_gpio_remove), + .driver = { + .name = PM8XXX_GPIO_DEV_NAME, + .owner = THIS_MODULE, + }, +}; + +static int __init pm_gpio_init(void) +{ + int rc = platform_driver_register(&pm_gpio_driver); + + return rc; +} +subsys_initcall(pm_gpio_init); + +static void __exit pm_gpio_exit(void) +{ + platform_driver_unregister(&pm_gpio_driver); +} +module_exit(pm_gpio_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("PMIC GPIO driver"); +MODULE_VERSION("1.0"); +MODULE_ALIAS("platform:" PM8XXX_GPIO_DEV_NAME); diff --git a/drivers/mfd/pm8921-core.c b/drivers/mfd/pm8921-core.c index d554551..c887ac6 100644 --- a/drivers/mfd/pm8921-core.c +++ b/drivers/mfd/pm8921-core.c @@ -79,6 +79,22 @@ static struct pm8xxx_drvdata pm8921_drvdata = { .pmic_read_irq_stat = pm8921_read_irq_stat, }; +static const struct resource gpio_cell_resources[] __devinitconst = { + [0] = { + .start = PM8921_IRQ_BLOCK_BIT(PM8921_GPIO_BLOCK_START, 0), + .end = PM8921_IRQ_BLOCK_BIT(PM8921_GPIO_BLOCK_START, 0) + + PM8921_NR_GPIOS - 1, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct mfd_cell gpio_cell __devinitdata = { + .name = PM8XXX_GPIO_DEV_NAME, + .id = -1, + .resources = gpio_cell_resources, + .num_resources = ARRAY_SIZE(gpio_cell_resources), +}; + static int __devinit pm8921_add_subdevices(const struct pm8921_platform_data *pdata, struct pm8921 *pmic, @@ -103,7 +119,25 @@ static int __devinit pm8921_add_subdevices(const struct pm8921_platform_data pmic->irq_data = irq_data; } + if (pdata->gpio_pdata) { + pdata->gpio_pdata->gpio_cdata.ngpios = PM8921_NR_GPIOS; + pdata->gpio_pdata->gpio_cdata.rev = rev; + gpio_cell.platform_data = pdata->gpio_pdata; + gpio_cell.data_size = sizeof(struct pm8xxx_gpio_platform_data); + ret = mfd_add_devices(pmic->dev, 0, &gpio_cell, 1, + NULL, irq_base); + if (ret) { + pr_err("Failed to add gpio subdevice ret=%d\n", ret); + goto bail; + } + } + + return 0; bail: + if (pmic->irq_data) { + pm8xxx_irq_exit(pmic->irq_data); + pmic->irq_data = NULL; + } return ret; } diff --git a/include/linux/mfd/pm8921.h b/include/linux/mfd/pm8921.h index d2806ff..74d47c7 100644 --- a/include/linux/mfd/pm8921.h +++ b/include/linux/mfd/pm8921.h @@ -19,12 +19,23 @@ #include #include +#include #define PM8921_NR_IRQS 256 +#define PM8921_NR_GPIOS 44 + +#define PM8921_GPIO_BLOCK_START 24 +#define PM8921_IRQ_BLOCK_BIT(block, bit) ((block) * 8 + (bit)) + +/* GPIOs [1,N] */ +#define PM8921_GPIO_IRQ(base, gpio) ((base) + \ + PM8921_IRQ_BLOCK_BIT(PM8921_GPIO_BLOCK_START, (gpio)-1)) + struct pm8921_platform_data { int irq_base; struct pm8xxx_irq_platform_data *irq_pdata; + struct pm8xxx_gpio_platform_data *gpio_pdata; }; #endif diff --git a/include/linux/mfd/pm8xxx/gpio.h b/include/linux/mfd/pm8xxx/gpio.h new file mode 100644 index 0000000..3ab08e0 --- /dev/null +++ b/include/linux/mfd/pm8xxx/gpio.h @@ -0,0 +1,132 @@ +/* Copyright (c) 2011, Code Aurora Forum. 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 version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. + */ + +/* + * Qualcomm PMIC8XXX gpio driver header file + * + */ + +#ifndef __PM8XXX_GPIO_H +#define __PM8XXX_GPIO_H + +#include + +#define PM8XXX_GPIO_DEV_NAME "pm8xxx-gpio" + +struct pm8xxx_gpio_core_data { + u32 rev; + int ngpios; +}; + +struct pm8xxx_gpio_platform_data { + struct pm8xxx_gpio_core_data gpio_cdata; + int gpio_base; +}; + +/* GPIO parameters */ +/* direction */ +#define PM_GPIO_DIR_OUT 0x01 +#define PM_GPIO_DIR_IN 0x02 +#define PM_GPIO_DIR_BOTH (PM_GPIO_DIR_OUT | PM_GPIO_DIR_IN) + +/* output_buffer */ +#define PM_GPIO_OUT_BUF_OPEN_DRAIN 1 +#define PM_GPIO_OUT_BUF_CMOS 0 + +/* pull */ +#define PM_GPIO_PULL_UP_30 0 +#define PM_GPIO_PULL_UP_1P5 1 +#define PM_GPIO_PULL_UP_31P5 2 +#define PM_GPIO_PULL_UP_1P5_30 3 +#define PM_GPIO_PULL_DN 4 +#define PM_GPIO_PULL_NO 5 + +/* vin_sel: Voltage Input Select */ +#define PM_GPIO_VIN_VPH 0 +#define PM_GPIO_VIN_BB 1 +#define PM_GPIO_VIN_S3 2 +#define PM_GPIO_VIN_L3 3 +#define PM_GPIO_VIN_L7 4 +#define PM_GPIO_VIN_L6 5 +#define PM_GPIO_VIN_L5 6 +#define PM_GPIO_VIN_L2 7 + +/* out_strength */ +#define PM_GPIO_STRENGTH_NO 0 +#define PM_GPIO_STRENGTH_HIGH 1 +#define PM_GPIO_STRENGTH_MED 2 +#define PM_GPIO_STRENGTH_LOW 3 + +/* function */ +#define PM_GPIO_FUNC_NORMAL 0 +#define PM_GPIO_FUNC_PAIRED 1 +#define PM_GPIO_FUNC_1 2 +#define PM_GPIO_FUNC_2 3 +#define PM_GPIO_DTEST1 4 +#define PM_GPIO_DTEST2 5 +#define PM_GPIO_DTEST3 6 +#define PM_GPIO_DTEST4 7 + +/** + * struct pm_gpio - structure to specify gpio configurtion values + * @direction: indicates whether the gpio should be input, output, or + * both. Should be of the type PM_GPIO_DIR_* + * @output_buffer: indicates gpio should be configured as CMOS or open + * drain. Should be of the type PM_GPIO_OUT_BUF_* + * @output_value: The gpio output value of the gpio line - 0 or 1 + * @pull: Indicates whether a pull up or pull down should be + * applied. If a pullup is required the current strength + * needs to be specified. Current values of 30uA, 1.5uA, + * 31.5uA, 1.5uA with 30uA boost are supported. This value + * should be one of the PM_GPIO_PULL_* + * @vin_sel: specifies the voltage level when the output is set to 1. + * For an input gpio specifies the voltage level at which + * the input is interpreted as a logical 1. + * @out_strength: the amount of current supplied for an output gpio, + * should be of the type PM_GPIO_STRENGTH_* + * @function: choose alternate function for the gpio. Certain gpios + * can be paired (shorted) with each other. Some gpio pin + * can act as alternate functions. This parameter should + * be of type PM_GPIO_FUNC_* + * @inv_int_pol: Invert polarity before feeding the line to the interrupt + * module in pmic. This feature will almost be never used + * since the pm8xxx interrupt block can detect both edges + * and both levels. + */ +struct pm_gpio { + int direction; + int output_buffer; + int output_value; + int pull; + int vin_sel; + int out_strength; + int function; + int inv_int_pol; +}; + +#if defined(CONFIG_GPIO_PM8XXX) || defined(CONFIG_GPIO_PM8XXX_MODULE) +/** + * pm8xxx_gpio_config - configure a gpio controlled by a pm8xxx chip + * @gpio: gpio number to configure + * @param: configuration values + * + * RETURNS: an appropriate -ERRNO error value on error, or zero for success. + */ +int pm8xxx_gpio_config(int gpio, struct pm_gpio *param); +#else +static inline int pm8xxx_gpio_config(int gpio, struct pm_gpio *param) +{ + return -ENXIO; +} +#endif + +#endif -- 1.7.1 Sent by an employee of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- 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/