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    Subject[PATCH 10/20] input/tc3589x: add tc3589x keypad support
    Date
    Add support for the keypad controller module found on the
    TC3589X devices. This driver default adds the support for
    TC35893 device.

    Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
    ---
    drivers/input/keyboard/Kconfig | 10 +
    drivers/input/keyboard/Makefile | 1 +
    drivers/input/keyboard/tc3589x-keypad.c | 440 +++++++++++++++++++++++++++++++
    drivers/mfd/tc3589x.c | 28 ++-
    include/linux/mfd/tc3589x.h | 52 ++++
    5 files changed, 530 insertions(+), 1 deletions(-)
    create mode 100644 drivers/input/keyboard/tc3589x-keypad.c

    diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
    index ee85e5b..0231ad3 100644
    --- a/drivers/input/keyboard/Kconfig
    +++ b/drivers/input/keyboard/Kconfig
    @@ -452,6 +452,16 @@ config KEYBOARD_SPEAR
    To compile this driver as a module, choose M here: the
    module will be called spear-keboard.

    +config KEYBOARD_TC3589X
    + tristate "TC3589X Keypad support"
    + depends on MFD_TC3589X
    + help
    + Say Y here if you want to use the keypad controller on
    + TC35892/3 I/O expander
    +
    + To compile this driver as a module, choose M here: the
    + module will be called tc3589x-keypad
    +
    config KEYBOARD_TNETV107X
    tristate "TI TNETV107X keypad support"
    depends on ARCH_DAVINCI_TNETV107X
    diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
    index 8449c73..8ff1455 100644
    --- a/drivers/input/keyboard/Makefile
    +++ b/drivers/input/keyboard/Makefile
    @@ -41,6 +41,7 @@ obj-$(CONFIG_KEYBOARD_SPEAR) += spear-keyboard.o
    obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o
    obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o
    obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o
    +obj-$(CONFIG_KEYBOARD_TC3589X) += tc3589x-keypad.o
    obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o
    obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o
    obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o
    diff --git a/drivers/input/keyboard/tc3589x-keypad.c b/drivers/input/keyboard/tc3589x-keypad.c
    new file mode 100644
    index 0000000..1bfd49a
    --- /dev/null
    +++ b/drivers/input/keyboard/tc3589x-keypad.c
    @@ -0,0 +1,440 @@
    +/*
    + * Copyright (C) ST-Ericsson SA 2010
    + *
    + * Author: Jayeeta Banerjee <jayeeta.banerjee@stericsson.com>
    + * Author: Sundar Iyer <sundar.iyer@stericsson.com>
    + *
    + * License Terms: GNU General Public License, version 2
    + *
    + * TC35893 MFD Keypad Controller driver
    + */
    +
    +#include <linux/module.h>
    +#include <linux/init.h>
    +#include <linux/interrupt.h>
    +#include <linux/spinlock.h>
    +#include <linux/input.h>
    +#include <linux/platform_device.h>
    +#include <linux/input/matrix_keypad.h>
    +#include <linux/i2c.h>
    +#include <linux/slab.h>
    +#include <linux/mfd/tc3589x.h>
    +
    +/* Maximum supported keypad matrix row/columns size */
    +#define TC3589x_MAX_KPROW 8
    +#define TC3589x_MAX_KPCOL 12
    +
    +/* keypad related Constants */
    +#define TC3589x_MAX_DEBOUNCE_SETTLE 0xFF
    +#define DEDICATED_KEY_VAL 0xFF
    +
    +/* Pull up/down masks */
    +#define TC3589x_NO_PULL_MASK 0x0
    +#define TC3589x_PULL_DOWN_MASK 0x1
    +#define TC3589x_PULL_UP_MASK 0x2
    +#define TC3589x_PULLUP_ALL_MASK 0xAA
    +#define TC3589x_IO_PULL_VAL(index, mask) ((mask)<<((index)%4)*2))
    +
    +/* Bit masks for IOCFG register */
    +#define IOCFG_BALLCFG 0x01
    +#define IOCFG_IG 0x08
    +
    +#define KP_EVCODE_COL_MASK 0x0F
    +#define KP_EVCODE_ROW_MASK 0x70
    +#define KP_RELEASE_EVT_MASK 0x80
    +
    +#define KP_ROW_SHIFT 4
    +
    +#define KP_NO_VALID_KEY_MASK 0x7F
    +
    +/* bit masks for RESTCTRL register */
    +#define TC3589x_KBDRST 0x2
    +#define TC3589x_IRQRST 0x10
    +#define TC3589x_RESET_ALL 0x1B
    +
    +/* KBDMFS register bit mask */
    +#define TC3589x_KBDMFS_EN 0x1
    +
    +/* CLKEN register bitmask */
    +#define KPD_CLK_EN 0x1
    +
    +/* RSTINTCLR register bit mask */
    +#define IRQ_CLEAR 0x1
    +
    +/* bit masks for keyboard interrupts*/
    +#define TC3589x_EVT_LOSS_INT 0x8
    +#define TC3589x_EVT_INT 0x4
    +#define TC3589x_KBD_LOSS_INT 0x2
    +#define TC3589x_KBD_INT 0x1
    +
    +/* bit masks for keyboard interrupt clear*/
    +#define TC3589x_EVT_INT_CLR 0x2
    +#define TC3589x_KBD_INT_CLR 0x1
    +
    +#define TC3589x_KBD_KEYMAP_SIZE 64
    +
    +/**
    + * struct tc_keypad - data structure used by keypad driver
    + * @input: pointer to input device object
    + * @board: keypad platform device
    + * @krow: number of rows
    + * @kcol: number of coloumns
    + * @keymap: matrix scan code table for keycodes
    + */
    +struct tc_keypad {
    + struct tc3589x *tc3589x;
    + struct input_dev *input;
    + const struct tc3589x_keypad_platform_data *board;
    + unsigned int krow;
    + unsigned int kcol;
    + unsigned short keymap[TC3589x_KBD_KEYMAP_SIZE];
    +};
    +
    +static int __devinit tc3589x_keypad_init_key_hardware(struct tc_keypad *keypad)
    +{
    + int ret;
    + struct tc3589x *tc3589x = keypad->tc3589x;
    + u8 settle_time = keypad->board->settle_time;
    + u8 dbounce_period = keypad->board->debounce_period;
    + u8 rows = keypad->board->krow & 0xf; /* mask out the nibble */
    + u8 column = keypad->board->kcol & 0xf; /* mask out the nibble */
    +
    + /* validate platform configurations */
    + if ((keypad->board->kcol > TC3589x_MAX_KPCOL) ||
    + (keypad->board->krow > TC3589x_MAX_KPROW) ||
    + (keypad->board->debounce_period > TC3589x_MAX_DEBOUNCE_SETTLE) ||
    + (keypad->board->settle_time > TC3589x_MAX_DEBOUNCE_SETTLE))
    + return -EINVAL;
    +
    + /* configure KBDSIZE 4 LSbits for cols and 4 MSbits for rows */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_KBDSIZE, 0x0,
    + (rows << KP_ROW_SHIFT) | column);
    + if (ret < 0)
    + return ret;
    +
    + /* configure dedicated key config, no dedicated key selected */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_KBCFG_LSB,
    + 0x0, DEDICATED_KEY_VAL);
    + if (ret < 0)
    + return ret;
    +
    + ret = tc3589x_set_bits(tc3589x, TC3589x_KBCFG_MSB,
    + 0x0, DEDICATED_KEY_VAL);
    + if (ret < 0)
    + return ret;
    +
    + /* Configure settle time */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_KBDSETTLE_REG,
    + 0x0, settle_time);
    + if (ret < 0)
    + return ret;
    +
    + /* Configure debounce time */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_KBDBOUNCE, 0x0, dbounce_period);
    + if (ret < 0)
    + return ret;
    +
    + /* Start of initialise keypad GPIOs */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_IOCFG, 0x0, IOCFG_IG);
    + if (ret < 0)
    + return ret;
    +
    + /* Configure pull-up resistors for all row GPIOs */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_IOPULLCFG0_LSB, 0x0,
    + TC3589x_PULLUP_ALL_MASK);
    + if (ret < 0)
    + return ret;
    +
    + ret = tc3589x_set_bits(tc3589x, TC3589x_IOPULLCFG0_MSB, 0x0,
    + TC3589x_PULLUP_ALL_MASK);
    + if (ret < 0)
    + return ret;
    +
    + /* Configure pull-up resistors for all column GPIOs */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_IOPULLCFG1_LSB, 0x0,
    + TC3589x_PULLUP_ALL_MASK);
    + if (ret < 0)
    + return ret;
    +
    + ret = tc3589x_set_bits(tc3589x, TC3589x_IOPULLCFG1_MSB, 0x0,
    + TC3589x_PULLUP_ALL_MASK);
    + if (ret < 0)
    + return ret;
    +
    + ret = tc3589x_set_bits(tc3589x, TC3589x_IOPULLCFG2_LSB, 0x0,
    + TC3589x_PULLUP_ALL_MASK);
    +
    + return ret;
    +}
    +
    +#define TC35893_DATA_REGS 4
    +#define TC35893_KEYCODE_FIFO_EMPTY 0x7f
    +#define TC35893_KEYCODE_FIFO_CLEAR 0xff
    +
    +static irqreturn_t tc3589x_keypad_irq(int irq, void *dev)
    +{
    + struct tc_keypad *keypad = (struct tc_keypad *)dev;
    + struct tc3589x *tc3589x = keypad->tc3589x;
    + u8 i, row_index, col_index, kbd_code, up;
    + u8 code;
    +
    + for (i = 0; i < (TC35893_DATA_REGS * 2); i++) {
    + kbd_code = tc3589x_reg_read(tc3589x, TC3589x_EVTCODE_FIFO);
    +
    + /* loop till fifo is empty and no more keys are pressed */
    + if ((kbd_code == TC35893_KEYCODE_FIFO_EMPTY) ||
    + (kbd_code == TC35893_KEYCODE_FIFO_CLEAR))
    + continue;
    +
    + /* valid key is found */
    + col_index = kbd_code & KP_EVCODE_COL_MASK;
    + row_index = (kbd_code & KP_EVCODE_ROW_MASK) >> KP_ROW_SHIFT;
    + code = MATRIX_SCAN_CODE(row_index, col_index, 0x3);
    + up = kbd_code & KP_RELEASE_EVT_MASK;
    +
    + input_event(keypad->input, EV_MSC, MSC_SCAN, code);
    + input_report_key(keypad->input, keypad->keymap[code], !up);
    + input_sync(keypad->input);
    + }
    +
    + /* clear IRQ */
    + tc3589x_set_bits(tc3589x, TC3589x_KBDIC,
    + 0x0, TC3589x_EVT_INT_CLR | TC3589x_KBD_INT_CLR);
    + /* enable IRQ */
    + tc3589x_set_bits(tc3589x, TC3589x_KBDMSK,
    + 0x0, TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT);
    +
    + return IRQ_HANDLED;
    +}
    +
    +static int tc3589x_keypad_enable(struct tc3589x *tc3589x)
    +{
    + int ret;
    +
    + /* pull the keypad module out of reset */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, TC3589x_KBDRST, 0x0);
    + if (ret < 0)
    + return ret;
    +
    + /* configure KBDMFS */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMFS, 0x0, TC3589x_KBDMFS_EN);
    + if (ret < 0)
    + return ret;
    +
    + /* enable the keypad clock */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_CLKEN, 0x0, KPD_CLK_EN);
    + if (ret < 0)
    + return ret;
    +
    + /* clear pending IRQs */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_RSTINTCLR, 0x0, 0x1);
    + if (ret < 0)
    + return ret;
    +
    + /* enable the IRQs */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, 0x0,
    + TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT);
    +
    + return ret;
    +}
    +
    +static int tc3589x_keypad_disable(struct tc3589x *tc3589x)
    +{
    + int ret;
    +
    + /* clear IRQ */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_KBDIC,
    + 0x0, TC3589x_EVT_INT_CLR | TC3589x_KBD_INT_CLR);
    + if (ret < 0)
    + return ret;
    +
    + /* disable all interrupts */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMSK,
    + ~(TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT), 0x0);
    + if (ret < 0)
    + return ret;
    +
    + /* disable the keypad module */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_CLKEN, 0x1, 0x0);
    + if (ret < 0)
    + return ret;
    +
    + /* put the keypad module into reset */
    + ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, TC3589x_KBDRST, 0x1);
    +
    + return ret;
    +}
    +
    +static int __devinit tc3589x_keypad_probe(struct platform_device *pdev)
    +{
    + struct tc3589x *tc3589x = dev_get_drvdata(pdev->dev.parent);
    + struct tc_keypad *keypad;
    + struct input_dev *input;
    + const struct tc3589x_keypad_platform_data *plat;
    + int error, irq;
    +
    + plat = tc3589x->pdata->keypad;
    + if (!plat) {
    + dev_err(&pdev->dev, "invalid keypad platform data\n");
    + return -EINVAL;
    + }
    +
    + irq = platform_get_irq(pdev, 0);
    + if (irq < 0)
    + return irq;
    +
    + keypad = kzalloc(sizeof(struct tc_keypad), GFP_KERNEL);
    + input = input_allocate_device();
    + if (!keypad || !input) {
    + dev_err(&pdev->dev, "failed to allocate keypad memory\n");
    + error = -ENOMEM;
    + goto err_free_mem;
    + }
    +
    + keypad->board = plat;
    + keypad->input = input;
    + keypad->tc3589x = tc3589x;
    +
    + /* enable the keypad module */
    + error = tc3589x_keypad_enable(tc3589x);
    + if (error < 0) {
    + dev_err(&pdev->dev, "failed to enable keypad module\n");
    + goto err_free_mem;
    + }
    +
    + error = tc3589x_keypad_init_key_hardware(keypad);
    + if (error < 0) {
    + dev_err(&pdev->dev, "failed to configure keypad module\n");
    + goto err_free_mem;
    + }
    +
    + input->id.bustype = BUS_HOST;
    + input->name = pdev->name;
    + input->dev.parent = &pdev->dev;
    +
    + input->keycode = keypad->keymap;
    + input->keycodesize = sizeof(keypad->keymap[0]);
    + input->keycodemax = ARRAY_SIZE(keypad->keymap);
    +
    + input_set_capability(input, EV_MSC, MSC_SCAN);
    +
    + __set_bit(EV_KEY, input->evbit);
    + if (!plat->no_autorepeat)
    + __set_bit(EV_REP, input->evbit);
    +
    + matrix_keypad_build_keymap(plat->keymap_data, 0x3,
    + input->keycode, input->keybit);
    +
    + error = request_threaded_irq(irq, NULL,
    + tc3589x_keypad_irq, plat->irqtype,
    + "tc3589x-keypad", keypad);
    + if (error < 0) {
    + dev_err(&pdev->dev,
    + "Could not allocate irq %d,error %d\n",
    + irq, error);
    + goto err_free_mem;
    + }
    +
    + error = input_register_device(input);
    + if (error) {
    + dev_err(&pdev->dev, "Could not register input device\n");
    + goto err_free_irq;
    + }
    +
    + device_init_wakeup(&pdev->dev, plat->enable_wakeup);
    + device_set_wakeup_capable(&pdev->dev, plat->enable_wakeup);
    +
    + platform_set_drvdata(pdev, keypad);
    +
    + return 0;
    +
    +err_free_irq:
    + free_irq(irq, keypad);
    +err_free_mem:
    + input_free_device(input);
    + kfree(keypad);
    + return error;
    +}
    +
    +static int __devexit tc3589x_keypad_remove(struct platform_device *pdev)
    +{
    + struct tc_keypad *keypad = platform_get_drvdata(pdev);
    + struct tc3589x *tc3589x = keypad->tc3589x;
    + int irq = platform_get_irq(pdev, 0);
    +
    + free_irq(irq, keypad);
    +
    + input_unregister_device(keypad->input);
    +
    + tc3589x_keypad_disable(tc3589x);
    +
    + kfree(keypad);
    +
    + return 0;
    +}
    +
    +#ifdef CONFIG_PM
    +static int tc3589x_keypad_suspend(struct device *dev)
    +{
    + struct platform_device *pdev = to_platform_device(dev);
    + struct tc_keypad *keypad = platform_get_drvdata(pdev);
    + struct tc3589x *tc3589x = keypad->tc3589x;
    + int irq = platform_get_irq(pdev, 0);
    +
    + /* disable the IRQ */
    + if (!device_may_wakeup(&pdev->dev))
    + tc3589x_keypad_disable(tc3589x);
    + else
    + enable_irq_wake(irq);
    +
    + return 0;
    +}
    +
    +static int tc3589x_keypad_resume(struct device *dev)
    +{
    + struct platform_device *pdev = to_platform_device(dev);
    + struct tc_keypad *keypad = platform_get_drvdata(pdev);
    + struct tc3589x *tc3589x = keypad->tc3589x;
    + int irq = platform_get_irq(pdev, 0);
    +
    + /* enable the IRQ */
    + if (!device_may_wakeup(&pdev->dev))
    + tc3589x_keypad_enable(tc3589x);
    + else
    + disable_irq_wake(irq);
    +
    + return 0;
    +}
    +
    +static const struct dev_pm_ops tc3589x_keypad_dev_pm_ops = {
    + .suspend = tc3589x_keypad_suspend,
    + .resume = tc3589x_keypad_resume,
    +};
    +#endif
    +
    +static struct platform_driver tc3589x_keypad_driver = {
    + .driver.name = "tc3589x-keypad",
    + .driver.owner = THIS_MODULE,
    +#ifdef CONFIG_PM
    + .driver.pm = &tc3589x_keypad_dev_pm_ops,
    +#endif
    + .probe = tc3589x_keypad_probe,
    + .remove = __devexit_p(tc3589x_keypad_remove),
    +};
    +
    +static int __init tc3589x_keypad_init(void)
    +{
    + return platform_driver_register(&tc3589x_keypad_driver);
    +}
    +
    +static void __exit tc3589x_keypad_exit(void)
    +{
    + return platform_driver_unregister(&tc3589x_keypad_driver);
    +}
    +
    +module_init(tc3589x_keypad_init);
    +module_exit(tc3589x_keypad_exit);
    +
    +MODULE_LICENSE("GPL v2");
    +MODULE_AUTHOR("Jayeeta Banerjee/Sundar Iyer");
    +MODULE_DESCRIPTION("TC35893 Keypad Driver");
    diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c
    index 0ed9669..5672d56 100644
    --- a/drivers/mfd/tc3589x.c
    +++ b/drivers/mfd/tc3589x.c
    @@ -129,6 +129,14 @@ static struct resource gpio_resources[] = {
    },
    };

    +static struct resource keypad_resources[] = {
    + {
    + .start = TC3589x_INT_KBDIRQ,
    + .end = TC3589x_INT_KBDIRQ,
    + .flags = IORESOURCE_IRQ,
    + },
    +};
    +
    static struct mfd_cell tc3589x_dev_gpio[] = {
    {
    .name = "tc3589x-gpio",
    @@ -137,6 +145,14 @@ static struct mfd_cell tc3589x_dev_gpio[] = {
    },
    };

    +static struct mfd_cell tc3589x_dev_keypad[] = {
    + {
    + .name = "tc3589x-keypad",
    + .num_resources = ARRAY_SIZE(keypad_resources),
    + .resources = &keypad_resources[0],
    + },
    +};
    +
    static irqreturn_t tc3589x_irq(int irq, void *data)
    {
    struct tc3589x *tc3589x = data;
    @@ -256,8 +272,18 @@ static int __devinit tc3589x_device_init(struct tc3589x *tc3589x)
    dev_info(tc3589x->dev, "added gpio block\n");
    }

    - return ret;
    + if (blocks & TC3589x_BLOCK_KEYPAD) {
    + ret = mfd_add_devices(tc3589x->dev, -1, tc3589x_dev_keypad,
    + ARRAY_SIZE(tc3589x_dev_keypad), NULL,
    + tc3589x->irq_base);
    + if (ret) {
    + dev_err(tc3589x->dev, "failed to keypad child\n");
    + return ret;
    + }
    + dev_info(tc3589x->dev, "added keypad block\n");
    + }

    + return ret;
    }

    static int __devinit tc3589x_probe(struct i2c_client *i2c,
    diff --git a/include/linux/mfd/tc3589x.h b/include/linux/mfd/tc3589x.h
    index da00958..8550e00 100644
    --- a/include/linux/mfd/tc3589x.h
    +++ b/include/linux/mfd/tc3589x.h
    @@ -20,6 +20,17 @@ enum tx3589x_block {
    #define TC3589x_RSTCTRL_KBDRST (1 << 1)
    #define TC3589x_RSTCTRL_GPIRST (1 << 0)

    +/* Keyboard Configuration Registers */
    +#define TC3589x_KBDSETTLE_REG 0x01
    +#define TC3589x_KBDBOUNCE 0x02
    +#define TC3589x_KBDSIZE 0x03
    +#define TC3589x_KBCFG_LSB 0x04
    +#define TC3589x_KBCFG_MSB 0x05
    +#define TC3589x_KBDIC 0x08
    +#define TC3589x_KBDMSK 0x09
    +#define TC3589x_EVTCODE_FIFO 0x10
    +#define TC3589x_KBDMFS 0x8F
    +
    #define TC3589x_IRQST 0x91

    #define TC3589x_MANFCODE_MAGIC 0x03
    @@ -35,6 +46,14 @@ enum tx3589x_block {
    #define TC3589x_EXTRSTN 0x83
    #define TC3589x_RSTINTCLR 0x84

    +/* Pull up/down configuration registers */
    +#define TC3589x_IOCFG 0xA7
    +#define TC3589x_IOPULLCFG0_LSB 0xAA
    +#define TC3589x_IOPULLCFG0_MSB 0xAB
    +#define TC3589x_IOPULLCFG1_LSB 0xAC
    +#define TC3589x_IOPULLCFG1_MSB 0xAD
    +#define TC3589x_IOPULLCFG2_LSB 0xAE
    +
    #define TC3589x_GPIOIS0 0xC9
    #define TC3589x_GPIOIS1 0xCA
    #define TC3589x_GPIOIS2 0xCB
    @@ -112,6 +131,37 @@ extern int tc3589x_block_write(struct tc3589x *tc3589x, u8 reg, u8 length,
    const u8 *values);
    extern int tc3589x_set_bits(struct tc3589x *tc3589x, u8 reg, u8 mask, u8 val);

    +/*
    + * Keypad related platform specific constants
    + * These values may be modified for fine tuning
    + */
    +#define TC_KPD_ROWS 0x8
    +#define TC_KPD_COLUMNS 0x8
    +#define TC_KPD_DEBOUNCE_PERIOD 0xA3
    +#define TC_KPD_SETTLE_TIME 0xA3
    +
    +/**
    + * struct tc35893_platform_data - data structure for platform specific data
    + * @keymap_data: matrix scan code table for keycodes
    + * @krow: mask for available rows, value is 0xFF
    + * @kcol: mask for available columns, value is 0xFF
    + * @debounce_period: platform specific debounce time
    + * @settle_time: platform specific settle down time
    + * @irqtype: type of interrupt, falling or rising edge
    + * @enable_wakeup: specifies if keypad event can wake up system from sleep
    + * @no_autorepeat: flag for auto repetition
    + */
    +struct tc3589x_keypad_platform_data {
    + struct matrix_keymap_data *keymap_data;
    + u8 krow;
    + u8 kcol;
    + u8 debounce_period;
    + u8 settle_time;
    + unsigned long irqtype;
    + bool enable_wakeup;
    + bool no_autorepeat;
    +};
    +
    /**
    * struct tc3589x_gpio_platform_data - TC3589x GPIO platform data
    * @gpio_base: first gpio number assigned to TC3589x. A maximum of
    @@ -130,11 +180,13 @@ struct tc3589x_gpio_platform_data {
    * @block: bitmask of blocks to enable (use TC3589x_BLOCK_*)
    * @irq_base: base IRQ number. %TC3589x_NR_IRQS irqs will be used.
    * @gpio: GPIO-specific platform data
    + * @keypad: keypad-specific platform data
    */
    struct tc3589x_platform_data {
    unsigned int block;
    int irq_base;
    struct tc3589x_gpio_platform_data *gpio;
    + struct tc3589x_keypad_platform_data *keypad;
    };

    #define TC3589x_NR_GPIOS 24
    --
    1.7.2.dirty


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