[PATCHv4 2/11] GPIO: GPIO module of DA9052 device driver
From: dd diasemi
Date: Tue Dec 21 2010 - 12:47:24 EST
GPIO module for DA9052 PMIC device from Dialog Semiconductor.
Changes made since last submission:
. locking for individual GPI pin configuration
. event registration
Linux Kernel Version: 2.6.34
Signed-off-by: D. Chen <dchen@xxxxxxxxxxx>
---
diff -urpN linux-2.6.34-orig2/drivers/gpio/da9052-gpio.c
linux-2.6.34/drivers/gpio/da9052-gpio.c
--- linux-2.6.34-orig2/drivers/gpio/da9052-gpio.c 1970-01-01
05:00:00.000000000 +0500
+++ linux-2.6.34/drivers/gpio/da9052-gpio.c 2010-10-13 14:21:21.000000000 +0500
@@ -0,0 +1,720 @@
+/*
+ * da9052-gpio.c -- GPIO Driver for Dialog DA9052
+ *
+ * Copyright(c) 2009 Dialog Semiconductor Ltd.
+ *
+ * Author: Dialog Semiconductor Ltd <dchen@xxxxxxxxxxx>
+ *
+ * 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/module.h>
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+#include <linux/platform_device.h>
+#include <linux/syscalls.h>
+#include <linux/seq_file.h>
+#include <linux/gpio.h>
+
+#include <linux/mfd/da9052/da9052.h>
+#include <linux/mfd/da9052/reg.h>
+#include <linux/mfd/da9052/gpio.h>
+
+#define DRIVER_NAME "da9052-gpio"
+static inline struct da9052_gpio_chip *to_da9052_gpio(struct gpio_chip *chip)
+{
+ return container_of(chip, struct da9052_gpio_chip, gp);
+}
+
+void da9052_gpio_notifier(struct da9052_eh_nb *eh_data, unsigned int event)
+{
+ struct da9052_gpio_chip *gpio =
+ container_of(eh_data, struct da9052_gpio_chip, eh_data);
+ kobject_uevent(&gpio->gp.dev->kobj, KOBJ_CHANGE);
+
+}
+
+static u8 create_gpio_config_value(u8 gpio_function, u8 gpio_type, u8
gpio_mode)
+{
+ /* The format is -
+ function - 2 bits
+ type - 1 bit
+ mode - 1 bit */
+ return gpio_function | (gpio_type << 2) | (gpio_mode << 3);
+}
+
+static s32 write_default_gpio_values(struct da9052 *da9052)
+{
+ struct da9052_ssc_msg msg;
+ u8 created_val = 0;
+
+#if (DA9052_GPIO_PIN_0 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO0001_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO0_FUNCTION,
+ DEFAULT_GPIO0_TYPE, DEFAULT_GPIO0_MODE);
+ msg.data &= DA9052_GPIO_MASK_UPPER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+#if (DA9052_GPIO_PIN_1 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO0001_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO1_FUNCTION,
+ DEFAULT_GPIO1_TYPE, DEFAULT_GPIO1_MODE);
+ created_val = created_val << DA9052_GPIO_NIBBLE_SHIFT;
+ msg.data &= DA9052_GPIO_MASK_LOWER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+/* GPIO 2-3*/
+#if (DA9052_GPIO_PIN_2 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO0203_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO2_FUNCTION,
+ DEFAULT_GPIO2_TYPE, DEFAULT_GPIO2_MODE);
+ msg.data &= DA9052_GPIO_MASK_UPPER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+#if (DA9052_GPIO_PIN_3 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO0203_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO3_FUNCTION,
+ DEFAULT_GPIO3_TYPE, DEFAULT_GPIO3_MODE);
+ created_val = created_val << DA9052_GPIO_NIBBLE_SHIFT;
+ msg.data &= DA9052_GPIO_MASK_LOWER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+/* GPIO 4-5*/
+#if (DA9052_GPIO_PIN_4 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO0405_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO4_FUNCTION,
+ DEFAULT_GPIO4_TYPE, DEFAULT_GPIO4_MODE);
+ msg.data &= DA9052_GPIO_MASK_UPPER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+#if (DA9052_GPIO_PIN_5 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO0405_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO5_FUNCTION,
+ DEFAULT_GPIO5_TYPE, DEFAULT_GPIO5_MODE);
+ created_val = created_val << DA9052_GPIO_NIBBLE_SHIFT;
+ msg.data &= DA9052_GPIO_MASK_LOWER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+/* GPIO 6-7*/
+#if (DA9052_GPIO_PIN_6 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO0607_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO6_FUNCTION,
+ DEFAULT_GPIO6_TYPE, DEFAULT_GPIO6_MODE);
+ msg.data &= DA9052_GPIO_MASK_UPPER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+#if (DA9052_GPIO_PIN_7 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO0607_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO7_FUNCTION,
+ DEFAULT_GPIO7_TYPE, DEFAULT_GPIO7_MODE);
+ created_val = created_val << DA9052_GPIO_NIBBLE_SHIFT;
+ msg.data &= DA9052_GPIO_MASK_LOWER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+/* GPIO 8-9*/
+#if (DA9052_GPIO_PIN_8 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO0809_REG;
+ msg.data = 0;
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO8_FUNCTION,
+ DEFAULT_GPIO8_TYPE, DEFAULT_GPIO8_MODE);
+ msg.data &= DA9052_GPIO_MASK_UPPER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+#if (DA9052_GPIO_PIN_9 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO0809_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO9_FUNCTION,
+ DEFAULT_GPIO9_TYPE, DEFAULT_GPIO9_MODE);
+ created_val = created_val << DA9052_GPIO_NIBBLE_SHIFT;
+ msg.data &= DA9052_GPIO_MASK_LOWER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+/* GPIO 10-11*/
+#if (DA9052_GPIO_PIN_10 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO1011_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO10_FUNCTION,
+ DEFAULT_GPIO10_TYPE, DEFAULT_GPIO10_MODE);
+ msg.data &= DA9052_GPIO_MASK_UPPER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+#if (DA9052_GPIO_PIN_11 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO1011_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO11_FUNCTION,
+ DEFAULT_GPIO11_TYPE, DEFAULT_GPIO11_MODE);
+ created_val = created_val << DA9052_GPIO_NIBBLE_SHIFT;
+ msg.data &= DA9052_GPIO_MASK_LOWER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+/* GPIO 12-13*/
+#if (DA9052_GPIO_PIN_12 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO1213_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO12_FUNCTION,
+ DEFAULT_GPIO12_TYPE, DEFAULT_GPIO12_MODE);
+ msg.data &= DA9052_GPIO_MASK_UPPER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+#if (DA9052_GPIO_PIN_13 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO1213_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO13_FUNCTION,
+ DEFAULT_GPIO13_TYPE, DEFAULT_GPIO13_MODE);
+ created_val = created_val << DA9052_GPIO_NIBBLE_SHIFT;
+ msg.data &= DA9052_GPIO_MASK_LOWER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+/* GPIO 14-15*/
+#if (DA9052_GPIO_PIN_14 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO1415_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO14_FUNCTION,
+ DEFAULT_GPIO14_TYPE, DEFAULT_GPIO14_MODE);
+ msg.data &= DA9052_GPIO_MASK_UPPER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+#if (DA9052_GPIO_PIN_15 == DA9052_GPIO_CONFIG)
+ da9052_lock(da9052);
+ msg.addr = DA9052_GPIO1415_REG;
+ msg.data = 0;
+
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+
+ created_val = create_gpio_config_value(DEFAULT_GPIO15_FUNCTION,
+ DEFAULT_GPIO15_TYPE, DEFAULT_GPIO15_MODE);
+ created_val = created_val << DA9052_GPIO_NIBBLE_SHIFT;
+ msg.data &= DA9052_GPIO_MASK_LOWER_NIBBLE;
+ msg.data |= created_val;
+
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+#endif
+ return 0;
+}
+
+s32 da9052_gpio_read_port(struct da9052_gpio_read_write *read_port,
+ struct da9052 *da9052)
+{
+ struct da9052_ssc_msg msg;
+ u8 shift_value = 0;
+ u8 port_functionality = 0;
+ msg.addr = (read_port->port_number / 2) + DA9052_GPIO0001_REG;
+ msg.data = 0;
+ da9052_lock(da9052);
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+ port_functionality =
+ (read_port->port_number % 2) ?
+ ((msg.data & DA9052_GPIO_ODD_PORT_FUNCTIONALITY) >>
+ DA9052_GPIO_NIBBLE_SHIFT) :
+ (msg.data & DA9052_GPIO_EVEN_PORT_FUNCTIONALITY);
+
+ if (port_functionality != INPUT)
+ return DA9052_GPIO_INVALID_PORTNUMBER;
+
+ if (read_port->port_number >= (DA9052_GPIO_MAX_PORTNUMBER))
+ return DA9052_GPIO_INVALID_PORTNUMBER;
+
+ if (read_port->port_number < DA9052_GPIO_MAX_PORTS_PER_REGISTER)
+ msg.addr = DA9052_STATUSC_REG;
+ else
+ msg.addr = DA9052_STATUSD_REG;
+ msg.data = 0;
+
+ da9052_lock(da9052);
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+
+ shift_value = msg.data &
+ (1 << DA9052_GPIO_SHIFT_COUNT(read_port->port_number));
+ read_port->read_write_value = (shift_value >>
+ DA9052_GPIO_SHIFT_COUNT(read_port->port_number));
+
+ return 0;
+}
+
+s32 da9052_gpio_multiple_read(struct da9052_gpio_multiple_read *multiple_port,
+ struct da9052 *da9052)
+{
+ struct da9052_ssc_msg msg[2];
+ u8 port_number = 0;
+ u8 loop_index = 0;
+ msg[loop_index++].addr = DA9052_STATUSC_REG;
+ msg[loop_index++].addr = DA9052_STATUSD_REG;
+
+ da9052_lock(da9052);
+ if (da9052->read_many(da9052, msg, loop_index)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+ loop_index = 0;
+ for (port_number = 0; port_number < DA9052_GPIO_MAX_PORTS_PER_REGISTER;
+ port_number++) {
+ multiple_port->signal_value[port_number] =
+ msg[loop_index].data & 1;
+ msg[loop_index].data = msg[loop_index].data >> 1;
+ }
+ loop_index++;
+ for (port_number = DA9052_GPIO_MAX_PORTS_PER_REGISTER;
+ port_number < DA9052_GPIO_MAX_PORTNUMBER; port_number++) {
+ multiple_port->signal_value[port_number] =
+ msg[loop_index].data & 1;
+ msg[loop_index].data = msg[loop_index].data >> 1;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(da9052_gpio_multiple_read);
+
+s32 da9052_gpio_write_port(struct da9052_gpio_read_write *write_port,
+ struct da9052 *da9052)
+{
+ struct da9052_ssc_msg msg;
+ u8 port_functionality = 0;
+ u8 bit_pos = 0;
+ msg.addr = DA9052_GPIO0001_REG + (write_port->port_number / 2);
+ msg.data = 0;
+
+ da9052_lock(da9052);
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+
+ port_functionality =
+ (write_port->port_number % 2) ?
+ ((msg.data & DA9052_GPIO_ODD_PORT_FUNCTIONALITY) >>
+ DA9052_GPIO_NIBBLE_SHIFT) :
+ (msg.data & DA9052_GPIO_EVEN_PORT_FUNCTIONALITY);
+
+ if (port_functionality < 2)
+ return DA9052_GPIO_INVALID_PORTNUMBER;
+
+ bit_pos = (write_port->port_number % 2) ?
+ DA9052_GPIO_ODD_PORT_WRITE_MODE :
+ DA9052_GPIO_EVEN_PORT_WRITE_MODE;
+
+ if (write_port->read_write_value)
+ msg.data = msg.data | bit_pos;
+ else
+ msg.data = (msg.data & ~(bit_pos));
+
+ da9052_lock(da9052);
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+ return 0;
+}
+
+s32 da9052_gpio_configure_port(struct da9052_gpio *gpio_data,
+ struct da9052 *da9052)
+{
+ struct da9052_ssc_msg msg;
+ u8 register_value = 0;
+ u8 function = 0;
+ u8 port_functionality = 0;
+ msg.addr = (gpio_data->port_number / 2) + DA9052_GPIO0001_REG;
+ msg.data = 0;
+
+ da9052_lock(da9052);
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+
+ port_functionality =
+ (gpio_data->port_number % 2) ?
+ ((msg.data & DA9052_GPIO_ODD_PORT_FUNCTIONALITY) >>
+ DA9052_GPIO_NIBBLE_SHIFT) :
+ (msg.data & DA9052_GPIO_EVEN_PORT_FUNCTIONALITY);
+ if (port_functionality < INPUT)
+ return DA9052_GPIO_INVALID_PORTNUMBER;
+ if (gpio_data->gpio_config.input.type > ACTIVE_HIGH)
+ return DA9052_GPIO_INVALID_TYPE;
+ if (gpio_data->gpio_config.input.mode > DEBOUNCING_ON)
+ return DA9052_GPIO_INVALID_MODE;
+ function = gpio_data->gpio_function;
+ switch (function) {
+ case INPUT:
+ register_value = create_gpio_config_value(function,
+ gpio_data->gpio_config.input.type,
+ gpio_data->gpio_config.input.mode);
+ break;
+ case OUTPUT_OPENDRAIN:
+ case OUTPUT_PUSHPULL:
+ register_value = create_gpio_config_value(function,
+ gpio_data->gpio_config.input.type,
+ gpio_data->gpio_config.input.mode);
+ break;
+ default:
+ return DA9052_GPIO_INVALID_FUNCTION;
+ break;
+ }
+
+ if (gpio_data->port_number % 2) {
+ msg.data = (msg.data & ~(DA9052_GPIO_MASK_UPPER_NIBBLE)) |
+ (register_value << DA9052_GPIO_NIBBLE_SHIFT);
+ } else {
+ msg.data = (msg.data & ~(DA9052_GPIO_MASK_LOWER_NIBBLE)) |
+ register_value;
+ }
+ da9052_lock(da9052);
+ if (da9052->write(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+ return 0;
+}
+
+static s32 da9052_gpio_read(struct gpio_chip *gc, u32 offset)
+{
+ struct da9052_gpio_chip *gpio;
+ gpio = to_da9052_gpio(gc);
+ gpio->read_write.port_number = offset;
+ da9052_gpio_read_port(&gpio->read_write, gpio->da9052);
+ return gpio->read_write.read_write_value;
+}
+
+static void da9052_gpio_write(struct gpio_chip *gc, u32 offset, s32 value)
+{
+ struct da9052_gpio_chip *gpio;
+ gpio = to_da9052_gpio(gc);
+ gpio->read_write.port_number = offset;
+ gpio->read_write.read_write_value = (u8)value;
+ da9052_gpio_write_port(&gpio->read_write, gpio->da9052);
+}
+
+static s32 da9052_gpio_ip(struct gpio_chip *gc, u32 offset)
+{
+ struct da9052_gpio_chip *gpio;
+ gpio = to_da9052_gpio(gc);
+ gpio->gpio.gpio_function = INPUT;
+ gpio->gpio.gpio_config.input.type = ACTIVE_LOW;
+ gpio->gpio.gpio_config.input.mode = DEBOUNCING_ON;
+ gpio->gpio.port_number = offset;
+ return da9052_gpio_configure_port(&gpio->gpio, gpio->da9052);
+}
+
+static s32 da9052_gpio_op(struct gpio_chip *gc, u32 offset, s32 value)
+{
+ struct da9052_gpio_chip *gpio;
+ gpio = to_da9052_gpio(gc);
+ gpio->gpio.gpio_function = OUTPUT_PUSHPULL;
+ gpio->gpio.gpio_config.output.type = SUPPLY_VDD_IO1;
+ gpio->gpio.gpio_config.output.mode = value;
+ gpio->gpio.port_number = offset;
+ return da9052_gpio_configure_port(&gpio->gpio, gpio->da9052);
+}
+
+static int __devinit da9052_gpio_probe(struct platform_device *pdev)
+{
+ struct da9052_gpio_chip *gpio;
+ struct da9052_platform_data *pdata = (pdev->dev.platform_data);
+ s32 ret;
+ gpio = kzalloc(sizeof(*gpio), GFP_KERNEL);
+ if (gpio == NULL)
+ return -ENOMEM;
+
+ gpio->da9052 = dev_get_drvdata(pdev->dev.parent);
+ gpio->gp.get = da9052_gpio_read;
+ gpio->gp.direction_input = da9052_gpio_ip;
+ gpio->gp.direction_output = da9052_gpio_op;
+ gpio->gp.set = da9052_gpio_write;
+ gpio->gp.base = pdata->gpio_base;
+ gpio->gp.ngpio = DA9052_GPIO_MAX_PORTNUMBER;
+ gpio->gp.can_sleep = 1;
+ gpio->gp.dev = &pdev->dev;
+ gpio->gp.owner = THIS_MODULE;
+ gpio->gp.label = "da9052-gpio";
+ gpio->eh_data.eve_type = GPI8_EVE;
+ gpio->eh_data.call_back = &da9052_gpio_notifier;
+
+ ret = gpio->da9052->register_event_notifier(gpio->da9052,
+ &gpio->eh_data);
+
+ ret = write_default_gpio_values(gpio->da9052);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "GPIO initial config failed, %d\n",
+ ret);
+ goto ret;
+ }
+
+ ret = gpiochip_add(&gpio->gp);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Could not register gpiochip, %d\n",
+ ret);
+ goto ret;
+ }
+ platform_set_drvdata(pdev, gpio);
+
+ return ret;
+
+ret:
+ kfree(gpio);
+ return ret;
+
+}
+
+static int __devexit da9052_gpio_remove(struct platform_device *pdev)
+{
+ struct da9052_gpio_chip *gpio = platform_get_drvdata(pdev);
+ int ret;
+
+ gpio->da9052->unregister_event_notifier
+ (gpio->da9052, &gpio->eh_data);
+ ret = gpiochip_remove(&gpio->gp);
+ if (ret == 0)
+ kfree(gpio);
+ return 0;
+}
+
+static struct platform_driver da9052_gpio_driver = {
+ .probe = da9052_gpio_probe,
+ .remove = __devexit_p(da9052_gpio_remove),
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init da9052_gpio_init(void)
+{
+ return platform_driver_register(&da9052_gpio_driver);
+}
+
+static void __exit da9052_gpio_exit(void)
+{
+ return platform_driver_unregister(&da9052_gpio_driver);
+}
+
+module_init(da9052_gpio_init);
+module_exit(da9052_gpio_exit);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("DA9052 GPIO Device Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff -urpN linux-2.6.34-orig2/drivers/gpio/Kconfig
linux-2.6.34/drivers/gpio/Kconfig
--- linux-2.6.34-orig2/drivers/gpio/Kconfig 2010-10-13 14:10:51.000000000 +0500
+++ linux-2.6.34/drivers/gpio/Kconfig 2010-10-12 13:53:17.000000000 +0500
@@ -65,6 +65,12 @@ config GPIO_SYSFS
# put expanders in the right section, in alphabetical order
+config DA9052_GPIO_ENABLE
+ bool "Dialog DA9052 GPIO"
+ depends on PMIC_DA9052
+ help
+ Say Y to enable the GPIO driver for the DA9052 chip
+
config GPIO_MAX730X
tristate
diff -urpN linux-2.6.34-orig2/drivers/gpio/Makefile
linux-2.6.34/drivers/gpio/Makefile
--- linux-2.6.34-orig2/drivers/gpio/Makefile 2010-10-13 14:10:31.000000000 +0500
+++ linux-2.6.34/drivers/gpio/Makefile 2010-10-12 13:55:41.000000000 +0500
@@ -6,6 +6,7 @@ obj-$(CONFIG_GPIOLIB) += gpiolib.o
obj-$(CONFIG_GPIO_ADP5520) += adp5520-gpio.o
obj-$(CONFIG_GPIO_ADP5588) += adp5588-gpio.o
+obj-$(CONFIG_DA9052_GPIO_ENABLE)+= da9052-gpio.o
obj-$(CONFIG_GPIO_LANGWELL) += langwell_gpio.o
obj-$(CONFIG_GPIO_MAX730X) += max730x.o
obj-$(CONFIG_GPIO_MAX7300) += max7300.o
diff -urpN linux-2.6.34-orig2/include/linux/mfd/da9052/gpio.h
linux-2.6.34/include/linux/mfd/da9052/gpio.h
--- linux-2.6.34-orig2/include/linux/mfd/da9052/gpio.h 1970-01-01
05:00:00.000000000 +0500
+++ linux-2.6.34/include/linux/mfd/da9052/gpio.h 2010-10-11
11:04:42.000000000 +0500
@@ -0,0 +1,253 @@
+/*
+ * da9052 GPIO module declarations.
+ *
+ * Copyright(c) 2009 Dialog Semiconductor Ltd.
+ *
+ * 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
+
+#include <linux/gpio.h>
+#define DA9052_GPIO_DEVICE_NAME "da9052_gpio"
+
+#define DA9052_GPIO_INVALID_TYPE 1
+#define DA9052_GPIO_INVALID_MODE 2
+#define DA9052_GPIO_INVALID_PORTNUMBER 3
+#define DA9052_GPIO_INVALID_FUNCTION 4
+
+#define DA9052_GPIO_CONFIG_ADC 1
+#define DA9052_GPIO_CONFIG_TSI 2
+#define DA9052_GPIO_CONFIG_PM 3
+#define DA9052_GPIO_CONFIG_ACC_ID_DET 4
+#define DA9052_GPIO_CONFIG_GP_FB1 5
+#define DA9052_GPIO_CONFIG_VDD_FAULT 6
+#define DA9052_GPIO_CONFIG_I2C 7
+#define DA9052_GPIO_CONFIG 8
+
+/* Currently used defines for GPIO PINs */
+#define DA9052_GPIO_PIN_0 DA9052_GPIO_CONFIG_ADC
+#define DA9052_GPIO_PIN_1 DA9052_GPIO_CONFIG_ADC
+#define DA9052_GPIO_PIN_2 DA9052_GPIO_CONFIG_ADC
+
+#define DA9052_GPIO_PIN_3 DA9052_GPIO_CONFIG_TSI
+#define DA9052_GPIO_PIN_4 DA9052_GPIO_CONFIG_TSI
+#define DA9052_GPIO_PIN_5 DA9052_GPIO_CONFIG_TSI
+#define DA9052_GPIO_PIN_6 DA9052_GPIO_CONFIG_TSI
+#define DA9052_GPIO_PIN_7 DA9052_GPIO_CONFIG_TSI
+
+#define DA9052_GPIO_PIN_8 DA9052_GPIO_CONFIG
+#define DA9052_GPIO_PIN_9 DA9052_GPIO_CONFIG
+#define DA9052_GPIO_PIN_10 DA9052_GPIO_CONFIG
+#define DA9052_GPIO_PIN_11 DA9052_GPIO_CONFIG
+
+#define DA9052_GPIO_PIN_12 DA9052_GPIO_CONFIG
+#define DA9052_GPIO_PIN_13 DA9052_GPIO_CONFIG
+
+#define DA9052_GPIO_PIN_14 DA9052_GPIO_CONFIG
+#define DA9052_GPIO_PIN_15 DA9052_GPIO_CONFIG
+
+enum ip_op_type {
+ ALTERNATE_FUNCTIONALITY = 0,
+ INPUT,
+ OUTPUT_OPENDRAIN,
+ OUTPUT_PUSHPULL
+};
+
+enum ip_type {
+ ACTIVE_LOW = 0,
+ ACTIVE_HIGH
+};
+
+enum op_type {
+ SUPPLY_VDD_IO1 = 0,
+ SUPPLY_VDD_IO2
+};
+
+
+enum op_mode {
+ OUTPUT_LOWLEVEL = 0,
+ OUTPUT_HIGHLEVEL
+};
+
+
+enum ip_mode {
+ DEBOUNCING_OFF = 0,
+ DEBOUNCING_ON
+};
+
+/*DEFAULT CONFIG FOR GPIO 0*/
+#if (DA9052_GPIO_PIN_0 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO0_FUNCTION INPUT
+#define DEFAULT_GPIO0_TYPE ACTIVE_LOW
+#define DEFAULT_GPIO0_MODE DEBOUNCING_ON
+#endif
+
+/*DEFAULT CONFIG FOR GPIO 1*/
+#if (DA9052_GPIO_PIN_1 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO1_FUNCTION INPUT
+#define DEFAULT_GPIO1_TYPE ACTIVE_LOW
+#define DEFAULT_GPIO1_MODE DEBOUNCING_ON
+#endif
+
+/*DEFAULT CONFIG FOR GPIO 2*/
+#if (DA9052_GPIO_PIN_2 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO2_FUNCTION INPUT
+#define DEFAULT_GPIO2_TYPE ACTIVE_LOW
+#define DEFAULT_GPIO2_MODE DEBOUNCING_ON
+#endif
+
+/*DEFAULT CONFIG FOR GPIO 3*/
+#if (DA9052_GPIO_PIN_3 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO3_FUNCTION INPUT
+#define DEFAULT_GPIO3_TYPE ACTIVE_LOW
+#define DEFAULT_GPIO3_MODE DEBOUNCING_ON
+#endif
+
+/*DEFAULT CONFIG FOR GPIO 4*/
+#if (DA9052_GPIO_PIN_4 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO4_FUNCTION OUTPUT_PUSHPULL
+#define DEFAULT_GPIO4_TYPE SUPPLY_VDD_IO1
+#define DEFAULT_GPIO4_MODE OUTPUT_LOWLEVEL
+#endif
+/*DEFAULT CONFIG FOR GPIO 5*/
+#if (DA9052_GPIO_PIN_5 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO5_FUNCTION OUTPUT_PUSHPULL
+#define DEFAULT_GPIO5_TYPE SUPPLY_VDD_IO1
+#define DEFAULT_GPIO5_MODE OUTPUT_LOWLEVEL
+#endif
+
+/*DEFAULT CONFIG FOR GPIO 6*/
+#if (DA9052_GPIO_PIN_6 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO6_FUNCTION OUTPUT_PUSHPULL
+#define DEFAULT_GPIO6_TYPE SUPPLY_VDD_IO1
+#define DEFAULT_GPIO6_MODE OUTPUT_LOWLEVEL
+#endif
+
+/*DEFAULT CONFIG FOR GPIO 7*/
+#if (DA9052_GPIO_PIN_7 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO7_FUNCTION OUTPUT_PUSHPULL
+#define DEFAULT_GPIO7_TYPE SUPPLY_VDD_IO1
+#define DEFAULT_GPIO7_MODE OUTPUT_LOWLEVEL
+#endif
+
+/*DEFAULT CONFIG FOR GPIO 8*/
+#if (DA9052_GPIO_PIN_8 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO8_FUNCTION INPUT
+#define DEFAULT_GPIO8_TYPE ACTIVE_LOW
+#define DEFAULT_GPIO8_MODE DEBOUNCING_ON
+#endif
+
+/*DEFAULT CONFIG FOR GPIO 9*/
+#if (DA9052_GPIO_PIN_9 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO9_FUNCTION INPUT
+#define DEFAULT_GPIO9_TYPE ACTIVE_LOW
+#define DEFAULT_GPIO9_MODE DEBOUNCING_ON
+#endif
+
+#if (DA9052_GPIO_PIN_10 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO10_FUNCTION OUTPUT_PUSHPULL
+#define DEFAULT_GPIO10_TYPE SUPPLY_VDD_IO2
+#define DEFAULT_GPIO10_MODE OUTPUT_HIGHLEVEL
+#endif
+
+/*DEFAULT CONFIG FOR GPIO 11 - for RTC blinking LED */
+#if (DA9052_GPIO_PIN_11 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO11_FUNCTION OUTPUT_PUSHPULL
+#define DEFAULT_GPIO11_TYPE SUPPLY_VDD_IO2
+#define DEFAULT_GPIO11_MODE OUTPUT_HIGHLEVEL
+#endif
+
+/*DEFAULT CONFIG FOR GPIO 12*/
+#if (DA9052_GPIO_PIN_12 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO12_FUNCTION OUTPUT_PUSHPULL
+#define DEFAULT_GPIO12_TYPE SUPPLY_VDD_IO1
+#define DEFAULT_GPIO12_MODE OUTPUT_LOWLEVEL
+#endif
+/*DEFAULT CONFIG FOR GPIO 13*/
+#if (DA9052_GPIO_PIN_13 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO13_FUNCTION OUTPUT_PUSHPULL
+#define DEFAULT_GPIO13_TYPE SUPPLY_VDD_IO1
+#define DEFAULT_GPIO13_MODE OUTPUT_LOWLEVEL
+#endif
+
+/*DEFAULT CONFIG FOR GPIO 14 - for LED4 */
+#if (DA9052_GPIO_PIN_14 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO14_FUNCTION OUTPUT_OPENDRAIN
+#define DEFAULT_GPIO14_TYPE SUPPLY_VDD_IO1
+#define DEFAULT_GPIO14_MODE OUTPUT_HIGHLEVEL
+#endif
+
+/*DEFAULT CONFIG FOR GPIO 15 - for LED5 */
+#if (DA9052_GPIO_PIN_15 == DA9052_GPIO_CONFIG)
+#define DEFAULT_GPIO15_FUNCTION OUTPUT_OPENDRAIN
+#define DEFAULT_GPIO15_TYPE SUPPLY_VDD_IO1
+#define DEFAULT_GPIO15_MODE OUTPUT_HIGHLEVEL
+#endif
+
+#define DA9052_GPIO_MAX_PORTNUMBER 16
+#define DA9052_GPIO_MAX_PORTS_PER_REGISTER 8
+#define DA9052_GPIO_SHIFT_COUNT(no) ((no)%8)
+#define DA9052_GPIO_EVEN_PORT_FUNCTIONALITY 0x03
+#define DA9052_GPIO_ODD_PORT_FUNCTIONALITY 0x30
+#define DA9052_GPIO_MASK_UPPER_NIBBLE 0xF0
+#define DA9052_GPIO_MASK_LOWER_NIBBLE 0x0F
+#define DA9052_GPIO_NIBBLE_SHIFT 4
+#define DA9052_GPIO_EVEN_PORT_WRITE_MODE (1 << 3)
+#define DA9052_GPIO_ODD_PORT_WRITE_MODE (1 << 7)
+
+
+struct da9052_gpio_read_write {
+ u8 port_number:4;
+ u8 read_write_value:1;
+} ;
+
+struct da9052_gpio_multiple_read {
+ u8 signal_value[16];
+};
+
+struct da9052_gpi_config {
+ enum ip_type type;
+ enum ip_mode mode;
+};
+
+struct da9052_gpo_config {
+ enum op_type type;
+ enum op_mode mode;
+} ;
+
+union da9052_gpio_config {
+ struct da9052_gpi_config input;
+ struct da9052_gpo_config output;
+};
+
+struct da9052_gpio {
+ union da9052_gpio_config gpio_config;
+ enum ip_op_type gpio_function;
+ u8 port_number:4;
+};
+
+struct da9052_gpio_chip {
+ struct da9052_gpio gpio;
+ struct da9052_gpio_read_write read_write;
+ struct da9052 *da9052;
+ /* For testing*/
+ struct da9052_eh_nb eh_data;
+ struct gpio_chip gp;
+};
+
+#endif /* __LINUX_MFD_DA9052_GPIO_H */
--
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