+++ /dev/null
-From 9d67bbbef07b0568d0541f79e3cd664d71d2d96c Mon Sep 17 00:00:00 2001
-From: Lars-Peter Clausen <lars@metafoo.de>
-Date: Wed, 12 May 2010 14:22:36 +0200
-Subject: [PATCH 4/5] Add n516 lpc driver
-
----
- drivers/misc/Kconfig | 8 +
- drivers/misc/Makefile | 1 +
- drivers/misc/n516-lpc.c | 471 +++++++++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 480 insertions(+), 0 deletions(-)
- create mode 100644 drivers/misc/n516-lpc.c
-
---- a/drivers/misc/Kconfig
-+++ b/drivers/misc/Kconfig
-@@ -452,6 +452,14 @@ config PCH_PHUB
- To compile this driver as a module, choose M here: the module will
- be called pch_phub.
-
-+config N516_LPC
-+ tristate "N516 keys & power controller"
-+ depends on I2C
-+ depends on INPUT
-+ depends on POWER_SUPPLY
-+ help
-+ N516 keyboard & power controller driver
-+
- source "drivers/misc/c2port/Kconfig"
- source "drivers/misc/eeprom/Kconfig"
- source "drivers/misc/cb710/Kconfig"
---- a/drivers/misc/Makefile
-+++ b/drivers/misc/Makefile
-@@ -42,3 +42,4 @@ obj-$(CONFIG_ARM_CHARLCD) += arm-charlcd
- obj-$(CONFIG_PCH_PHUB) += pch_phub.o
- obj-y += ti-st/
- obj-$(CONFIG_AB8500_PWM) += ab8500-pwm.o
-+obj-$(CONFIG_N516_LPC) += n516-lpc.o
---- /dev/null
-+++ b/drivers/misc/n516-lpc.c
-@@ -0,0 +1,471 @@
-+#include <linux/module.h>
-+#include <linux/version.h>
-+#include <linux/init.h>
-+#include <linux/fs.h>
-+#include <linux/interrupt.h>
-+#include <linux/irq.h>
-+#include <linux/sched.h>
-+#include <linux/pm.h>
-+#include <linux/sysctl.h>
-+#include <linux/proc_fs.h>
-+#include <linux/delay.h>
-+#include <linux/platform_device.h>
-+#include <linux/input.h>
-+#include <linux/power_supply.h>
-+#include <linux/suspend.h>
-+
-+#include <linux/i2c.h>
-+
-+#include <asm/mach-jz4740/irq.h>
-+#include <asm/mach-jz4740/gpio.h>
-+#include <asm/mach-jz4740/board-n516.h>
-+
-+static int batt_level=0;
-+module_param(batt_level, int, 0);
-+
-+struct n516_lpc_chip {
-+ struct i2c_client *i2c_client;
-+ struct input_dev *input;
-+ unsigned int battery_level;
-+ unsigned int suspending:1, can_sleep:1;
-+};
-+
-+static struct n516_lpc_chip *the_lpc;
-+
-+struct i2c_device_id n516_lpc_i2c_ids[] = {
-+ {"LPC524", 0},
-+ {},
-+};
-+
-+MODULE_DEVICE_TABLE(i2c, n516_lpc_i2c_ids);
-+
-+static const unsigned short normal_i2c[] = I2C_ADDRS(0x54);
-+
-+static const unsigned int n516_lpc_keymap[] = {
-+ [0x01] = KEY_4,
-+ [0x02] = KEY_3,
-+ [0x03] = KEY_2,
-+ [0x04] = KEY_1,
-+ [0x05] = KEY_0,
-+ [0x07] = KEY_9,
-+ [0x08] = KEY_8,
-+ [0x09] = KEY_7,
-+ [0x0a] = KEY_6,
-+ [0x0b] = KEY_5,
-+ [0x0d] = KEY_PLAYPAUSE,
-+ [0x0e] = KEY_MENU,
-+ [0x0f] = KEY_SEARCH,
-+ [0x10] = KEY_DIRECTION,
-+ [0x11] = KEY_SPACE,
-+ [0x13] = KEY_ENTER,
-+ [0x14] = KEY_UP,
-+ [0x15] = KEY_DOWN,
-+ [0x16] = KEY_RIGHT,
-+ [0x17] = KEY_LEFT,
-+ [0x19] = KEY_PAGEDOWN,
-+ [0x1a] = KEY_PAGEUP,
-+ [0x1c] = KEY_POWER,
-+ [0x1d] = KEY_ESC,
-+ [0x1e] = KEY_SLEEP,
-+ [0x1f] = KEY_WAKEUP,
-+};
-+
-+static const unsigned int batt_charge[] = {0, 7, 20, 45, 65, 80, 100};
-+#define MAX_BAT_LEVEL 6
-+
-+static inline int n516_bat_charging(void)
-+{
-+ return !gpio_get_value(GPIO_CHARG_STAT_N);
-+}
-+
-+static int n516_bat_get_status(struct power_supply *b)
-+{
-+ if (power_supply_am_i_supplied(b)) {
-+ if (n516_bat_charging())
-+ return POWER_SUPPLY_STATUS_CHARGING;
-+ else
-+ return POWER_SUPPLY_STATUS_FULL;
-+ } else {
-+ return POWER_SUPPLY_STATUS_DISCHARGING;
-+ }
-+}
-+
-+static int n516_bat_get_charge(struct power_supply *b)
-+{
-+ return batt_charge[the_lpc->battery_level];
-+}
-+
-+static int n516_bat_get_property(struct power_supply *b,
-+ enum power_supply_property psp,
-+ union power_supply_propval *val)
-+{
-+ switch (psp) {
-+ case POWER_SUPPLY_PROP_STATUS:
-+ val->intval = n516_bat_get_status(b);
-+ break;
-+ case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
-+ val->intval = 100;
-+ break;
-+ case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
-+ val->intval = 0;
-+ break;
-+ case POWER_SUPPLY_PROP_CHARGE_NOW:
-+ val->intval = n516_bat_get_charge(b);
-+ break;
-+ default:
-+ return -EINVAL;
-+ }
-+ return 0;
-+}
-+
-+static void n516_bat_power_changed(struct power_supply *p)
-+{
-+ if (power_supply_am_i_supplied(p) && !n516_bat_charging())
-+ the_lpc->battery_level = MAX_BAT_LEVEL;
-+
-+ power_supply_changed(p);
-+}
-+
-+static enum power_supply_property n516_bat_properties[] = {
-+ POWER_SUPPLY_PROP_STATUS,
-+ POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
-+ POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
-+ POWER_SUPPLY_PROP_CHARGE_NOW,
-+};
-+
-+static struct power_supply n516_battery = {
-+ .name = "n516-battery",
-+ .get_property = n516_bat_get_property,
-+ .properties = n516_bat_properties,
-+ .num_properties = ARRAY_SIZE(n516_bat_properties),
-+ .external_power_changed = n516_bat_power_changed,
-+};
-+
-+static irqreturn_t n516_bat_charge_irq(int irq, void *dev)
-+{
-+ struct power_supply *psy = dev;
-+
-+ dev_dbg(psy->dev, "Battery charging IRQ\n");
-+
-+ if (power_supply_am_i_supplied(psy) && !n516_bat_charging())
-+ the_lpc->battery_level = MAX_BAT_LEVEL;
-+
-+ power_supply_changed(psy);
-+
-+ return IRQ_HANDLED;
-+}
-+
-+static int n516_lpc_send_message(struct n516_lpc_chip *chip, unsigned char val)
-+{
-+ struct i2c_client *client = chip->i2c_client;
-+ struct i2c_msg msg = {client->addr, client->flags, 1, &val};
-+ int ret = 0;
-+
-+ ret = i2c_transfer(client->adapter, &msg, 1);
-+ return ret > 0 ? 0 : ret;
-+}
-+
-+static void n516_key_event(struct n516_lpc_chip *chip, unsigned char keycode)
-+{
-+ struct i2c_client *client = chip->i2c_client;
-+ bool long_press = false;
-+
-+ if (keycode & 0x40) {
-+ keycode &= ~0x40;
-+ long_press = true;
-+ }
-+
-+ dev_dbg(&client->dev, "keycode: 0x%02x, long_press: 0x%02x\n", keycode, (unsigned int)long_press);
-+
-+ if (keycode >= ARRAY_SIZE(n516_lpc_keymap) || n516_lpc_keymap[keycode] == 0)
-+ return;
-+
-+ if (long_press)
-+ input_report_key(chip->input, KEY_LEFTALT, 1);
-+
-+ input_report_key(chip->input, n516_lpc_keymap[keycode], 1);
-+ input_sync(chip->input);
-+ input_report_key(chip->input, n516_lpc_keymap[keycode], 0);
-+
-+ if (long_press)
-+ input_report_key(chip->input, KEY_LEFTALT, 0);
-+ input_sync(chip->input);
-+}
-+
-+static void n516_battery_event(struct n516_lpc_chip *chip, unsigned char battery_level)
-+{
-+ if (battery_level != chip->battery_level) {
-+ chip->battery_level = battery_level;
-+ power_supply_changed(&n516_battery);
-+ }
-+}
-+
-+static irqreturn_t n516_lpc_irq_thread(int irq, void *devid)
-+{
-+ struct n516_lpc_chip *chip = (struct n516_lpc_chip*)devid;
-+ int ret;
-+ unsigned char raw_msg;
-+ struct i2c_client *client = chip->i2c_client;
-+ struct i2c_msg msg = {client->addr, client->flags | I2C_M_RD, 1, &raw_msg};
-+
-+ if (client->dev.power.status >= DPM_OFF)
-+ return IRQ_HANDLED;
-+
-+ ret = i2c_transfer(client->adapter, &msg, 1);
-+ if (ret != 1) {
-+ dev_dbg(&client->dev, "I2C error: %d\n", ret);
-+ return IRQ_HANDLED;
-+ }
-+
-+ dev_dbg(&client->dev, "msg: 0x%02x\n", raw_msg);
-+
-+ /* Ack wakeup event */
-+ if ((raw_msg & ~0x40) < ARRAY_SIZE(n516_lpc_keymap))
-+ n516_key_event(chip, raw_msg);
-+ else if ((raw_msg >= 0x81) && (raw_msg <= 0x87))
-+ n516_battery_event(chip, raw_msg - 0x81);
-+ else if (raw_msg == 0x7e)
-+ n516_lpc_send_message(chip, 0x00);
-+ else
-+ dev_warn(&client->dev, "Unknown message: %x\n", raw_msg);
-+
-+ if (chip->suspending)
-+ chip->can_sleep = 0;
-+
-+ return IRQ_HANDLED;
-+}
-+
-+static void n516_lpc_power_off(void)
-+{
-+ struct i2c_client *client = the_lpc->i2c_client;
-+ unsigned char val = 0x01;
-+ struct i2c_msg msg = {client->addr, client->flags, 1, &val};
-+
-+ printk("Issue LPC POWEROFF command...\n");
-+ while (1)
-+ i2c_transfer(client->adapter, &msg, 1);
-+}
-+
-+static int n516_lpc_detect(struct i2c_client *client, struct i2c_board_info *info)
-+{
-+ return 0;
-+}
-+
-+static int n516_lpc_suspend_notifier(struct notifier_block *nb,
-+ unsigned long event,
-+ void *dummy)
-+{
-+ switch(event) {
-+ case PM_SUSPEND_PREPARE:
-+ the_lpc->suspending = 1;
-+ the_lpc->can_sleep = 1;
-+ break;
-+ case PM_POST_SUSPEND:
-+ the_lpc->suspending = 0;
-+ the_lpc->can_sleep = 1;
-+ break;
-+ default:
-+ return NOTIFY_DONE;
-+ }
-+ return NOTIFY_OK;
-+}
-+
-+static struct notifier_block n516_lpc_notif_block = {
-+ .notifier_call = n516_lpc_suspend_notifier,
-+};
-+
-+static int __devinit n516_lpc_probe(struct i2c_client *client, const struct i2c_device_id *id)
-+{
-+ struct n516_lpc_chip *chip;
-+ struct input_dev *input;
-+ int ret = 0;
-+ int i;
-+
-+ chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-+ if (!chip)
-+ return -ENOMEM;
-+
-+ the_lpc = chip;
-+ chip->i2c_client = client;
-+ if ((batt_level > 0) && (batt_level < ARRAY_SIZE(batt_charge)))
-+ chip->battery_level = batt_level;
-+ else
-+ chip->battery_level = 1;
-+
-+ i2c_set_clientdata(client, chip);
-+
-+ ret = gpio_request(GPIO_LPC_INT, "LPC interrupt request");
-+ if (ret) {
-+ dev_err(&client->dev, "Unable to reguest LPC INT GPIO\n");
-+ goto err_gpio_req_lpcint;
-+ }
-+
-+ ret = gpio_request(GPIO_CHARG_STAT_N, "LPC charging status");
-+ if (ret) {
-+ dev_err(&client->dev, "Unable to reguest CHARG STAT GPIO\n");
-+ goto err_gpio_req_chargstat;
-+ }
-+
-+ /* Enter normal mode */
-+ n516_lpc_send_message(chip, 0x2);
-+
-+ input = input_allocate_device();
-+ if (!input) {
-+ dev_err(&client->dev, "Unable to allocate input device\n");
-+ ret = -ENOMEM;
-+ goto err_input_alloc;
-+ }
-+
-+ chip->input = input;
-+
-+ __set_bit(EV_KEY, input->evbit);
-+
-+ for (i = 0; i < ARRAY_SIZE(n516_lpc_keymap); i++)
-+ __set_bit(n516_lpc_keymap[i], input->keybit);
-+
-+ __set_bit(KEY_LEFTALT, input->keybit);
-+
-+ input->name = "n516-keys";
-+ input->phys = "n516-keys/input0";
-+ input->dev.parent = &client->dev;
-+ input->id.bustype = BUS_I2C;
-+ input->id.vendor = 0x0001;
-+ input->id.product = 0x0001;
-+ input->id.version = 0x0100;
-+
-+ ret = input_register_device(input);
-+ if (ret < 0) {
-+ dev_err(&client->dev, "Unable to register input device\n");
-+ goto err_input_register;
-+ }
-+
-+ ret = power_supply_register(NULL, &n516_battery);
-+ if (ret) {
-+ dev_err(&client->dev, "Unable to register N516 battery\n");
-+ goto err_bat_reg;
-+ }
-+
-+ ret = request_threaded_irq(gpio_to_irq(GPIO_LPC_INT), NULL,
-+ n516_lpc_irq_thread,
-+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
-+ "lpc", chip);
-+ if (ret) {
-+ dev_err(&client->dev, "request_irq failed: %d\n", ret);
-+ goto err_request_lpc_irq;
-+ }
-+
-+ ret = request_irq(gpio_to_irq(GPIO_CHARG_STAT_N), n516_bat_charge_irq,
-+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
-+ "battery charging", &n516_battery);
-+ if (ret) {
-+ dev_err(&client->dev, "Unable to claim battery charging IRQ\n");
-+ goto err_request_chrg_irq;
-+ }
-+
-+ pm_power_off = n516_lpc_power_off;
-+ ret = register_pm_notifier(&n516_lpc_notif_block);
-+ if (ret) {
-+ dev_err(&client->dev, "Unable to register PM notify block\n");
-+ goto err_reg_pm_notifier;
-+ }
-+
-+ device_init_wakeup(&client->dev, 1);
-+
-+ return 0;
-+
-+ unregister_pm_notifier(&n516_lpc_notif_block);
-+err_reg_pm_notifier:
-+ free_irq(gpio_to_irq(GPIO_CHARG_STAT_N), &n516_battery);
-+err_request_chrg_irq:
-+ free_irq(gpio_to_irq(GPIO_LPC_INT), chip);
-+err_request_lpc_irq:
-+ power_supply_unregister(&n516_battery);
-+err_bat_reg:
-+ input_unregister_device(input);
-+err_input_register:
-+ input_free_device(input);
-+err_input_alloc:
-+ gpio_free(GPIO_CHARG_STAT_N);
-+err_gpio_req_chargstat:
-+ gpio_free(GPIO_LPC_INT);
-+err_gpio_req_lpcint:
-+ i2c_set_clientdata(client, NULL);
-+ kfree(chip);
-+
-+ return ret;
-+}
-+
-+static int __devexit n516_lpc_remove(struct i2c_client *client)
-+{
-+ struct n516_lpc_chip *chip = i2c_get_clientdata(client);
-+
-+ unregister_pm_notifier(&n516_lpc_notif_block);
-+ pm_power_off = NULL;
-+ free_irq(gpio_to_irq(GPIO_CHARG_STAT_N), &n516_battery);
-+ free_irq(gpio_to_irq(GPIO_LPC_INT), chip);
-+ power_supply_unregister(&n516_battery);
-+ input_unregister_device(chip->input);
-+ gpio_free(GPIO_CHARG_STAT_N);
-+ gpio_free(GPIO_LPC_INT);
-+ i2c_set_clientdata(client, NULL);
-+ kfree(chip);
-+
-+ return 0;
-+}
-+
-+#if CONFIG_PM
-+static int n516_lpc_suspend(struct i2c_client *client, pm_message_t msg)
-+{
-+ if (!the_lpc->can_sleep)
-+ return -EBUSY;
-+
-+ if (device_may_wakeup(&client->dev))
-+ enable_irq_wake(gpio_to_irq(GPIO_LPC_INT));
-+
-+ return 0;
-+}
-+
-+static int n516_lpc_resume(struct i2c_client *client)
-+{
-+ if (device_may_wakeup(&client->dev))
-+ disable_irq_wake(gpio_to_irq(GPIO_LPC_INT));
-+
-+ return 0;
-+}
-+#else
-+#define n516_lpc_suspend NULL
-+#define n516_lpc_resume NULL
-+#endif
-+
-+
-+static struct i2c_driver n516_lpc_driver = {
-+ .class = I2C_CLASS_HWMON,
-+ .driver = {
-+ .name = "n516-keys",
-+ .owner = THIS_MODULE,
-+ },
-+ .probe = n516_lpc_probe,
-+ .remove = __devexit_p(n516_lpc_remove),
-+ .detect = n516_lpc_detect,
-+ .id_table = n516_lpc_i2c_ids,
-+ .address_list = normal_i2c,
-+ .suspend = n516_lpc_suspend,
-+ .resume = n516_lpc_resume,
-+};
-+
-+static int __init n516_lpc_init(void)
-+{
-+ return i2c_add_driver(&n516_lpc_driver);
-+}
-+module_init(n516_lpc_init);
-+
-+static void __exit n516_lpc_exit(void)
-+{
-+ i2c_del_driver(&n516_lpc_driver);
-+}
-+module_exit(n516_lpc_exit);
-+
-+MODULE_AUTHOR("Yauhen Kharuzhy");
-+MODULE_LICENSE("GPL");
-+MODULE_DESCRIPTION("Keys and power controller driver for N516");
-+MODULE_ALIAS("platform:n516-keys");
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