input/keyboard: new driver for ADP5520 MFD PMICs
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Michael Hennerich
Samuel Ortiz
parent
a5736e0b62
commit
fba65fe0ed
@ -24,6 +24,16 @@ config KEYBOARD_AAED2000
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To compile this driver as a module, choose M here: the
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module will be called aaed2000_kbd.
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config KEYBOARD_ADP5520
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tristate "Keypad Support for ADP5520 PMIC"
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depends on PMIC_ADP5520
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help
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This option enables support for the keypad scan matrix
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on Analog Devices ADP5520 PMICs.
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To compile this driver as a module, choose M here: the module will
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be called adp5520-keys.
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config KEYBOARD_ADP5588
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tristate "ADP5588 I2C QWERTY Keypad and IO Expander"
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depends on I2C
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@ -5,6 +5,7 @@
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# Each configuration option enables a list of files.
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obj-$(CONFIG_KEYBOARD_AAED2000) += aaed2000_kbd.o
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obj-$(CONFIG_KEYBOARD_ADP5520) += adp5520-keys.o
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obj-$(CONFIG_KEYBOARD_ADP5588) += adp5588-keys.o
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obj-$(CONFIG_KEYBOARD_AMIGA) += amikbd.o
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obj-$(CONFIG_KEYBOARD_ATARI) += atakbd.o
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220
drivers/input/keyboard/adp5520-keys.c
Normal file
220
drivers/input/keyboard/adp5520-keys.c
Normal file
@ -0,0 +1,220 @@
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/*
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* Keypad driver for Analog Devices ADP5520 MFD PMICs
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*
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* Copyright 2009 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/input.h>
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#include <linux/mfd/adp5520.h>
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struct adp5520_keys {
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struct input_dev *input;
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struct notifier_block notifier;
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struct device *master;
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unsigned short keycode[ADP5520_KEYMAPSIZE];
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};
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static void adp5520_keys_report_event(struct adp5520_keys *dev,
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unsigned short keymask, int value)
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{
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int i;
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for (i = 0; i < ADP5520_MAXKEYS; i++)
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if (keymask & (1 << i))
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input_report_key(dev->input, dev->keycode[i], value);
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input_sync(dev->input);
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}
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static int adp5520_keys_notifier(struct notifier_block *nb,
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unsigned long event, void *data)
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{
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struct adp5520_keys *dev;
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uint8_t reg_val_lo, reg_val_hi;
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unsigned short keymask;
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dev = container_of(nb, struct adp5520_keys, notifier);
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if (event & ADP5520_KP_INT) {
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adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, ®_val_lo);
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adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, ®_val_hi);
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keymask = (reg_val_hi << 8) | reg_val_lo;
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/* Read twice to clear */
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adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, ®_val_lo);
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adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, ®_val_hi);
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keymask |= (reg_val_hi << 8) | reg_val_lo;
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adp5520_keys_report_event(dev, keymask, 1);
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}
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if (event & ADP5520_KR_INT) {
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adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, ®_val_lo);
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adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, ®_val_hi);
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keymask = (reg_val_hi << 8) | reg_val_lo;
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/* Read twice to clear */
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adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, ®_val_lo);
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adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, ®_val_hi);
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keymask |= (reg_val_hi << 8) | reg_val_lo;
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adp5520_keys_report_event(dev, keymask, 0);
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}
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return 0;
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}
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static int __devinit adp5520_keys_probe(struct platform_device *pdev)
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{
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struct adp5520_keys_platform_data *pdata = pdev->dev.platform_data;
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struct input_dev *input;
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struct adp5520_keys *dev;
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int ret, i;
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unsigned char en_mask, ctl_mask = 0;
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if (pdev->id != ID_ADP5520) {
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dev_err(&pdev->dev, "only ADP5520 supports Keypad\n");
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return -EINVAL;
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}
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if (pdata == NULL) {
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dev_err(&pdev->dev, "missing platform data\n");
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return -EINVAL;
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}
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if (!(pdata->rows_en_mask && pdata->cols_en_mask))
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return -EINVAL;
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (dev == NULL) {
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dev_err(&pdev->dev, "failed to alloc memory\n");
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return -ENOMEM;
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}
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input = input_allocate_device();
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if (!input) {
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ret = -ENOMEM;
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goto err;
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}
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dev->master = pdev->dev.parent;
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dev->input = input;
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input->name = pdev->name;
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input->phys = "adp5520-keys/input0";
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input->dev.parent = &pdev->dev;
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input_set_drvdata(input, dev);
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input->id.bustype = BUS_I2C;
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input->id.vendor = 0x0001;
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input->id.product = 0x5520;
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input->id.version = 0x0001;
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input->keycodesize = sizeof(dev->keycode[0]);
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input->keycodemax = pdata->keymapsize;
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input->keycode = dev->keycode;
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memcpy(dev->keycode, pdata->keymap,
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pdata->keymapsize * input->keycodesize);
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/* setup input device */
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__set_bit(EV_KEY, input->evbit);
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if (pdata->repeat)
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__set_bit(EV_REP, input->evbit);
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for (i = 0; i < input->keycodemax; i++)
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__set_bit(dev->keycode[i], input->keybit);
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__clear_bit(KEY_RESERVED, input->keybit);
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ret = input_register_device(input);
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if (ret) {
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dev_err(&pdev->dev, "unable to register input device\n");
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goto err;
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}
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en_mask = pdata->rows_en_mask | pdata->cols_en_mask;
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ret = adp5520_set_bits(dev->master, ADP5520_GPIO_CFG_1, en_mask);
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if (en_mask & ADP5520_COL_C3)
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ctl_mask |= ADP5520_C3_MODE;
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if (en_mask & ADP5520_ROW_R3)
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ctl_mask |= ADP5520_R3_MODE;
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if (ctl_mask)
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ret |= adp5520_set_bits(dev->master, ADP5520_LED_CONTROL,
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ctl_mask);
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ret |= adp5520_set_bits(dev->master, ADP5520_GPIO_PULLUP,
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pdata->rows_en_mask);
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if (ret) {
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dev_err(&pdev->dev, "failed to write\n");
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ret = -EIO;
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goto err1;
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}
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dev->notifier.notifier_call = adp5520_keys_notifier;
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ret = adp5520_register_notifier(dev->master, &dev->notifier,
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ADP5520_KP_IEN | ADP5520_KR_IEN);
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if (ret) {
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dev_err(&pdev->dev, "failed to register notifier\n");
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goto err1;
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}
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platform_set_drvdata(pdev, dev);
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return 0;
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err1:
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input_unregister_device(input);
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input = NULL;
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err:
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input_free_device(input);
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kfree(dev);
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return ret;
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}
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static int __devexit adp5520_keys_remove(struct platform_device *pdev)
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{
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struct adp5520_keys *dev = platform_get_drvdata(pdev);
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adp5520_unregister_notifier(dev->master, &dev->notifier,
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ADP5520_KP_IEN | ADP5520_KR_IEN);
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input_unregister_device(dev->input);
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kfree(dev);
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return 0;
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}
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static struct platform_driver adp5520_keys_driver = {
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.driver = {
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.name = "adp5520-keys",
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.owner = THIS_MODULE,
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},
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.probe = adp5520_keys_probe,
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.remove = __devexit_p(adp5520_keys_remove),
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};
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static int __init adp5520_keys_init(void)
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{
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return platform_driver_register(&adp5520_keys_driver);
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}
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module_init(adp5520_keys_init);
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static void __exit adp5520_keys_exit(void)
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{
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platform_driver_unregister(&adp5520_keys_driver);
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}
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module_exit(adp5520_keys_exit);
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MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
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MODULE_DESCRIPTION("Keys ADP5520 Driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:adp5520-keys");
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