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Subject[RFC v1 PATCH 2/6] input: pm8058_keypad: Qualcomm PMIC8058 keypad controller driver
Date
Add Qualcomm PMIC8058 based keypad controller driver
supporting upto 18x8 matrix configuration.

Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Trilok Soni <tsoni@codeaurora.org>
---
drivers/input/keyboard/Kconfig | 11 +
drivers/input/keyboard/Makefile | 1 +
drivers/input/keyboard/pmic8058-keypad.c | 769 ++++++++++++++++++++++++++++++
include/linux/input/pmic8058-keypad.h | 58 +++
4 files changed, 839 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/keyboard/pmic8058-keypad.c
create mode 100644 include/linux/input/pmic8058-keypad.h

diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index b8c51b9..d536acb 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -364,6 +364,17 @@ config KEYBOARD_PXA930_ROTARY
To compile this driver as a module, choose M here: the
module will be called pxa930_rotary.

+config KEYBOARD_PMIC8058
+ tristate "Qualcomm PMIC8058 keypad support"
+ depends on PMIC8058
+ help
+ Say Y here if you want to enable the driver for the PMIC8058
+ keypad provided as a reference design from Qualcomm. This is intended
+ to support upto 18x8 matrix based keypad design.
+
+ To compile this driver as a module, choose M here: the module will
+ be called pmic8058-keypad.
+
config KEYBOARD_SAMSUNG
tristate "Samsung keypad support"
depends on SAMSUNG_DEV_KEYPAD
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index a34452e..9ff8dbe 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_KEYBOARD_OMAP4) += omap4-keypad.o
obj-$(CONFIG_KEYBOARD_OPENCORES) += opencores-kbd.o
obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x_keypad.o
obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o
+obj-$(CONFIG_KEYBOARD_PMIC8058) += pmic8058-keypad.o
obj-$(CONFIG_KEYBOARD_QT2160) += qt2160.o
obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o
obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o
diff --git a/drivers/input/keyboard/pmic8058-keypad.c b/drivers/input/keyboard/pmic8058-keypad.c
new file mode 100644
index 0000000..77ddda6
--- /dev/null
+++ b/drivers/input/keyboard/pmic8058-keypad.c
@@ -0,0 +1,769 @@
+/* Copyright (c) 2009-2010, 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.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/bitops.h>
+#include <linux/mfd/pmic8058.h>
+#include <linux/delay.h>
+
+#include <linux/input/pmic8058-keypad.h>
+
+#define PM8058_MAX_ROWS 18
+#define PM8058_MAX_COLS 8
+#define PM8058_ROW_SHIFT 3
+#define PM8058_MATRIX_MAX_SIZE (PM8058_MAX_ROWS * PM8058_MAX_COLS)
+
+#define PM8058_MIN_ROWS 5
+#define PM8058_MIN_COLS 5
+
+#define MAX_SCAN_DELAY 128
+#define MIN_SCAN_DELAY 1
+
+/* in nanoseconds */
+#define MAX_ROW_HOLD_DELAY 122000
+#define MIN_ROW_HOLD_DELAY 30500
+
+#define MAX_DEBOUNCE_TIME 20
+#define MIN_DEBOUNCE_TIME 5
+
+#define KEYP_CTRL 0x148
+
+#define KEYP_CTRL_EVNTS BIT(0)
+#define KEYP_CTRL_EVNTS_MASK 0x3
+
+#define KEYP_CTRL_SCAN_COLS_SHIFT 5
+#define KEYP_CTRL_SCAN_COLS_MIN 5
+#define KEYP_CTRL_SCAN_COLS_BITS 0x3
+
+#define KEYP_CTRL_SCAN_ROWS_SHIFT 2
+#define KEYP_CTRL_SCAN_ROWS_MIN 5
+#define KEYP_CTRL_SCAN_ROWS_BITS 0x7
+
+#define KEYP_CTRL_KEYP_EN BIT(7)
+
+#define KEYP_SCAN 0x149
+
+#define KEYP_SCAN_READ_STATE BIT(0)
+#define KEYP_SCAN_DBOUNCE_SHIFT 1
+#define KEYP_SCAN_PAUSE_SHIFT 3
+#define KEYP_SCAN_ROW_HOLD_SHIFT 6
+
+#define KEYP_TEST 0x14A
+
+#define KEYP_TEST_CLEAR_RECENT_SCAN BIT(6)
+#define KEYP_TEST_CLEAR_OLD_SCAN BIT(5)
+#define KEYP_TEST_READ_RESET BIT(4)
+#define KEYP_TEST_DTEST_EN BIT(3)
+#define KEYP_TEST_ABORT_READ BIT(0)
+
+#define KEYP_TEST_DBG_SELECT_SHIFT 1
+
+/* bits of these registers represent
+ * '0' for key press
+ * '1' for key release
+ */
+#define KEYP_RECENT_DATA 0x14B
+#define KEYP_OLD_DATA 0x14C
+
+#define KEYP_CLOCK_FREQ 32768
+
+/**
+ * struct pmic8058_kp - internal keypad data structure
+ * @pdata - keypad platform data pointer
+ * @input - input device pointer for keypad
+ * @key_sense_irq - key press/release irq number
+ * @key_stuck_irq - key stuck notification irq number
+ * @keycodes - array to hold the key codes
+ * @dev - parent device pointer
+ * @keystate - present key press/release state
+ * @stuckstate - present state when key stuck irq
+ * @pm_chip - parent MFD core device
+ * @ctrl_reg - control register value
+ */
+struct pmic8058_kp {
+ const struct pmic8058_keypad_data *pdata;
+ struct input_dev *input;
+ int key_sense_irq;
+ int key_stuck_irq;
+
+ unsigned short *keycodes;
+
+ struct device *dev;
+ u16 keystate[PM8058_MAX_ROWS];
+ u16 stuckstate[PM8058_MAX_ROWS];
+
+ struct pm8058_chip *pm_chip;
+
+ u8 ctrl_reg;
+};
+
+static int pmic8058_kp_write_u8(struct pmic8058_kp *kp,
+ u8 data, u16 reg)
+{
+ int rc;
+
+ rc = pm8058_write(kp->pm_chip, reg, &data, 1);
+ if (rc < 0)
+ dev_warn(kp->dev, "Error writing pmic8058: %X - ret %X\n",
+ reg, rc);
+ return rc;
+}
+
+static int pmic8058_kp_read(struct pmic8058_kp *kp,
+ u8 *data, u16 reg, unsigned num_bytes)
+{
+ int rc;
+
+ rc = pm8058_read(kp->pm_chip, reg, data, num_bytes);
+ if (rc < 0)
+ dev_warn(kp->dev, "Error reading pmic8058: %X - ret %X\n",
+ reg, rc);
+
+ return rc;
+}
+
+static int pmic8058_kp_read_u8(struct pmic8058_kp *kp,
+ u8 *data, u16 reg)
+{
+ int rc;
+
+ rc = pmic8058_kp_read(kp, data, reg, 1);
+ if (rc < 0)
+ dev_warn(kp->dev, "Error reading pmic8058: %X - ret %X\n",
+ reg, rc);
+ return rc;
+}
+
+static u8 pmic8058_col_state(struct pmic8058_kp *kp, u8 col)
+{
+ /* all keys pressed on that particular row? */
+ if (col == 0x00)
+ return 1 << kp->pdata->num_cols;
+ else
+ return col & ((1 << kp->pdata->num_cols) - 1);
+}
+
+/*
+ * Synchronous read protocol for RevB0 onwards:
+ *
+ * 1. Write '1' to ReadState bit in KEYP_SCAN register
+ * 2. Wait 2*32KHz clocks, so that HW can successfully enter read mode
+ * synchronously
+ * 3. Read rows in old array first if events are more than one
+ * 4. Read rows in recent array
+ * 5. Wait 4*32KHz clocks
+ * 6. Write '0' to ReadState bit of KEYP_SCAN register so that hw can
+ * synchronously exit read mode.
+ */
+static int pmic8058_chk_sync_read(struct pmic8058_kp *kp)
+{
+ int rc;
+ u8 scan_val;
+
+ rc = pmic8058_kp_read_u8(kp, &scan_val, KEYP_SCAN);
+ if (rc < 0)
+ return rc;
+
+ scan_val |= 0x1;
+
+ rc = pmic8058_kp_write_u8(kp, scan_val, KEYP_SCAN);
+ if (rc < 0)
+ return rc;
+
+ /* 2 * 32KHz clocks */
+ udelay((2 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1);
+
+ return rc;
+}
+
+static int pmic8058_kp_read_data(struct pmic8058_kp *kp, u16 *state,
+ u16 data_reg, int read_rows)
+{
+ int rc, row;
+ u8 new_data[PM8058_MAX_ROWS];
+
+ rc = pmic8058_kp_read(kp, new_data, data_reg, read_rows);
+
+ if (!rc) {
+ for (row = 0; row < kp->pdata->num_rows; row++) {
+ dev_dbg(kp->dev, "new_data[%d] = %d\n", row,
+ new_data[row]);
+ state[row] = pmic8058_col_state(kp, new_data[row]);
+ }
+ }
+
+ return rc;
+}
+
+static int pmic8058_kp_read_matrix(struct pmic8058_kp *kp, u16 *new_state,
+ u16 *old_state)
+{
+ int rc, read_rows;
+ u8 scan_val;
+
+ read_rows = kp->pdata->num_rows;
+
+ pmic8058_chk_sync_read(kp);
+
+ if (old_state) {
+ rc = pmic8058_kp_read_data(kp, old_state, KEYP_OLD_DATA,
+ read_rows);
+ if (rc < 0)
+ return rc;
+ }
+
+ rc = pmic8058_kp_read_data(kp, new_state, KEYP_RECENT_DATA,
+ read_rows);
+ if (rc < 0)
+ return rc;
+
+ /* 4 * 32KHz clocks */
+ udelay((4 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1);
+
+ rc = pmic8058_kp_read_u8(kp, &scan_val, KEYP_SCAN);
+ if (rc < 0)
+ return rc;
+ scan_val &= 0xFE;
+ rc = pmic8058_kp_write_u8(kp, scan_val, KEYP_SCAN);
+ if (rc < 0)
+ return rc;
+
+ return rc;
+}
+
+static void __pmic8058_kp_scan_matrix(struct pmic8058_kp *kp, u16 *new_state,
+ u16 *old_state)
+{
+ int row, col, code;
+
+ for (row = 0; row < kp->pdata->num_rows; row++) {
+ int bits_changed = new_state[row] ^ old_state[row];
+
+ if (!bits_changed)
+ continue;
+
+ for (col = 0; col < kp->pdata->num_cols; col++) {
+ if (!(bits_changed & (1 << col)))
+ continue;
+
+ dev_dbg(kp->dev, "key [%d:%d] %s\n", row, col,
+ !(new_state[row] & (1 << col)) ?
+ "pressed" : "released");
+
+ code = MATRIX_SCAN_CODE(row, col, PM8058_ROW_SHIFT);
+ input_event(kp->input, EV_MSC, MSC_SCAN, code);
+ input_report_key(kp->input,
+ kp->keycodes[code],
+ !(new_state[row] & (1 << col)));
+
+ input_sync(kp->input);
+ }
+ }
+}
+
+static int pmic8058_detect_ghost_keys(struct pmic8058_kp *kp, u16 *new_state)
+{
+ int row, found_first = -1;
+ u16 check, row_state;
+
+ check = 0;
+ for (row = 0; row < kp->pdata->num_rows; row++) {
+ row_state = (~new_state[row]) &
+ ((1 << kp->pdata->num_cols) - 1);
+
+ if (hweight16(row_state) > 1) {
+ if (found_first == -1)
+ found_first = row;
+ if (check & row_state) {
+ dev_dbg(kp->dev, "detected ghost key on row[%d]"
+ " and row[%d]\n", found_first, row);
+ return 1;
+ }
+ }
+ check |= row_state;
+ }
+ return 0;
+}
+
+static int pmic8058_kp_scan_matrix(struct pmic8058_kp *kp, unsigned int events)
+{
+ u16 new_state[PM8058_MAX_ROWS];
+ u16 old_state[PM8058_MAX_ROWS];
+ int rc;
+
+ switch (events) {
+ case 0x1:
+ rc = pmic8058_kp_read_matrix(kp, new_state, NULL);
+ if (rc < 0)
+ return rc;
+
+ /* detecting ghost key is not an error */
+ if (pmic8058_detect_ghost_keys(kp, new_state))
+ return 0;
+ __pmic8058_kp_scan_matrix(kp, new_state, kp->keystate);
+ memcpy(kp->keystate, new_state, sizeof(new_state));
+ break;
+ case 0x3: /* two events - eventcounter is gray-coded */
+ rc = pmic8058_kp_read_matrix(kp, new_state, old_state);
+ if (rc < 0)
+ return rc;
+
+ __pmic8058_kp_scan_matrix(kp, old_state, kp->keystate);
+ __pmic8058_kp_scan_matrix(kp, new_state, old_state);
+ memcpy(kp->keystate, new_state, sizeof(new_state));
+ break;
+ case 0x2:
+ dev_dbg(kp->dev, "Some key events were lost\n");
+ rc = pmic8058_kp_read_matrix(kp, new_state, old_state);
+ if (rc < 0)
+ return rc;
+ __pmic8058_kp_scan_matrix(kp, old_state, kp->keystate);
+ __pmic8058_kp_scan_matrix(kp, new_state, old_state);
+ memcpy(kp->keystate, new_state, sizeof(new_state));
+ break;
+ default:
+ rc = -EINVAL;
+ }
+ return rc;
+}
+
+/*
+ * NOTE: We are reading recent and old data registers blindly
+ * whenever key-stuck interrupt happens, because events counter doesn't
+ * get updated when this interrupt happens due to key stuck doesn't get
+ * considered as key state change.
+ *
+ * We are not using old data register contents after they are being read
+ * because it might report the key which was pressed before the key being stuck
+ * as stuck key because it's pressed status is stored in the old data
+ * register.
+ */
+static irqreturn_t pmic8058_kp_stuck_irq(int irq, void *data)
+{
+ u16 new_state[PM8058_MAX_ROWS];
+ u16 old_state[PM8058_MAX_ROWS];
+ int rc;
+ struct pmic8058_kp *kp = data;
+
+ rc = pmic8058_kp_read_matrix(kp, new_state, old_state);
+ if (rc < 0) {
+ dev_err(kp->dev, "failed to read keypad matrix\n");
+ return IRQ_HANDLED;
+ }
+
+ __pmic8058_kp_scan_matrix(kp, new_state, kp->stuckstate);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pmic8058_kp_irq(int irq, void *data)
+{
+ struct pmic8058_kp *kp = data;
+ u8 ctrl_val, events;
+ int rc;
+
+ rc = pmic8058_kp_read(kp, &ctrl_val, KEYP_CTRL, 1);
+ if (rc < 0) {
+ dev_err(kp->dev, "failed to read keyp_ctrl register\n");
+ return IRQ_HANDLED;
+ }
+
+ events = ctrl_val & KEYP_CTRL_EVNTS_MASK;
+
+ rc = pmic8058_kp_scan_matrix(kp, events);
+ if (rc < 0)
+ dev_err(kp->dev, "failed to scan matrix\n");
+
+ return IRQ_HANDLED;
+}
+
+static int pmic8058_kpd_init(struct pmic8058_kp *kp)
+{
+ int bits, rc, cycles;
+ u8 scan_val = 0, ctrl_val = 0;
+ static u8 row_bits[] = {
+ 0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 7,
+ };
+
+ /* Find column bits */
+ if (kp->pdata->num_cols < KEYP_CTRL_SCAN_COLS_MIN)
+ bits = 0;
+ else
+ bits = kp->pdata->num_cols - KEYP_CTRL_SCAN_COLS_MIN;
+ ctrl_val = (bits & KEYP_CTRL_SCAN_COLS_BITS) <<
+ KEYP_CTRL_SCAN_COLS_SHIFT;
+
+ /* Find row bits */
+ if (kp->pdata->num_rows < KEYP_CTRL_SCAN_ROWS_MIN)
+ bits = 0;
+ else
+ bits = row_bits[kp->pdata->num_rows - KEYP_CTRL_SCAN_ROWS_MIN];
+
+ ctrl_val |= (bits << KEYP_CTRL_SCAN_ROWS_SHIFT);
+
+ rc = pmic8058_kp_write_u8(kp, ctrl_val, KEYP_CTRL);
+ if (rc < 0)
+ return rc;
+
+ bits = (kp->pdata->debounce_ms / 5) - 1;
+
+ scan_val |= (bits << KEYP_SCAN_DBOUNCE_SHIFT);
+
+ bits = fls(kp->pdata->scan_delay_ms) - 1;
+ scan_val |= (bits << KEYP_SCAN_PAUSE_SHIFT);
+
+ /* Row hold time is a multiple of 32KHz cycles. */
+ cycles = (kp->pdata->row_hold_ns * KEYP_CLOCK_FREQ) / NSEC_PER_SEC;
+
+ scan_val |= (cycles << KEYP_SCAN_ROW_HOLD_SHIFT);
+
+ rc = pmic8058_kp_write_u8(kp, scan_val, KEYP_SCAN);
+
+ return rc;
+}
+
+static int pmic8058_kp_enable(struct pmic8058_kp *kp)
+{
+ int rc;
+
+ kp->ctrl_reg |= KEYP_CTRL_KEYP_EN;
+
+ rc = pmic8058_kp_write_u8(kp, kp->ctrl_reg, KEYP_CTRL);
+ if (rc < 0)
+ return rc;
+
+ enable_irq(kp->key_sense_irq);
+ enable_irq(kp->key_stuck_irq);
+
+ return rc;
+}
+
+static int pmic8058_kp_disable(struct pmic8058_kp *kp)
+{
+ int rc;
+
+ kp->ctrl_reg &= ~KEYP_CTRL_KEYP_EN;
+
+ rc = pmic8058_kp_write_u8(kp, kp->ctrl_reg, KEYP_CTRL);
+ if (rc < 0)
+ return rc;
+
+ disable_irq(kp->key_sense_irq);
+ disable_irq(kp->key_stuck_irq);
+
+ return rc;
+}
+
+static int pmic8058_kp_open(struct input_dev *dev)
+{
+ struct pmic8058_kp *kp = input_get_drvdata(dev);
+
+ return pmic8058_kp_enable(kp);
+}
+
+static void pmic8058_kp_close(struct input_dev *dev)
+{
+ struct pmic8058_kp *kp = input_get_drvdata(dev);
+
+ pmic8058_kp_disable(kp);
+}
+
+/*
+ * keypad controller should be initialized in the following sequence
+ * only, otherwise it might get into FSM stuck state.
+ *
+ * - Initialize keypad control parameters, like no. of rows, columns,
+ * timing values etc.,
+ * - configure rows and column gpios pull up/down.
+ * - set irq edge type.
+ * - enable the keypad controller.
+ */
+static int __devinit pmic8058_kp_probe(struct platform_device *pdev)
+{
+ struct pmic8058_keypad_data *pdata = pdev->dev.platform_data;
+ const struct matrix_keymap_data *keymap_data;
+ struct pmic8058_kp *kp;
+ int rc;
+ unsigned short *keycodes;
+ u8 ctrl_val;
+ struct pm8058_chip *pm_chip;
+
+ pm_chip = platform_get_drvdata(pdev);
+ if (pm_chip == NULL) {
+ dev_err(&pdev->dev, "no parent data passed in\n");
+ return -EFAULT;
+ }
+
+ /* Check PMIC8058 version. A0 version is not supported */
+ if (pm8058_rev(pm_chip) == PM_8058_REV_1p0) {
+ dev_err(&pdev->dev, "PMIC8058 1.0 version is not supported\n");
+ return -ENODEV;
+ }
+
+ if (!pdata || !pdata->num_cols || !pdata->num_rows ||
+ pdata->num_cols > PM8058_MAX_COLS ||
+ pdata->num_rows > PM8058_MAX_ROWS ||
+ pdata->num_cols < PM8058_MIN_COLS ||
+ pdata->num_rows < PM8058_MIN_ROWS) {
+ dev_err(&pdev->dev, "invalid platform data\n");
+ return -EINVAL;
+ }
+
+ if (pdata->rows_gpio_start < 0 || pdata->cols_gpio_start < 0) {
+ dev_err(&pdev->dev, "invalid gpio_start platform data\n");
+ return -EINVAL;
+ }
+
+ if (!pdata->scan_delay_ms || pdata->scan_delay_ms > MAX_SCAN_DELAY
+ || pdata->scan_delay_ms < MIN_SCAN_DELAY ||
+ !is_power_of_2(pdata->scan_delay_ms)) {
+ dev_err(&pdev->dev, "invalid keypad scan time supplied\n");
+ return -EINVAL;
+ }
+
+ if (!pdata->row_hold_ns || pdata->row_hold_ns > MAX_ROW_HOLD_DELAY
+ || pdata->row_hold_ns < MIN_ROW_HOLD_DELAY ||
+ ((pdata->row_hold_ns % MIN_ROW_HOLD_DELAY) != 0)) {
+ dev_err(&pdev->dev, "invalid keypad row hold time supplied\n");
+ return -EINVAL;
+ }
+
+ if (!pdata->debounce_ms
+ || ((pdata->debounce_ms % 5) != 0)
+ || pdata->debounce_ms > MAX_DEBOUNCE_TIME
+ || pdata->debounce_ms < MIN_DEBOUNCE_TIME) {
+ dev_err(&pdev->dev, "invalid debounce time supplied\n");
+ return -EINVAL;
+ }
+
+ keymap_data = pdata->keymap_data;
+ if (!keymap_data) {
+ dev_err(&pdev->dev, "no keymap data supplied\n");
+ return -EINVAL;
+ }
+
+ kp = kzalloc(sizeof(*kp), GFP_KERNEL);
+ if (!kp)
+ return -ENOMEM;
+
+ keycodes = kzalloc(PM8058_MATRIX_MAX_SIZE * sizeof(*keycodes),
+ GFP_KERNEL);
+ if (!keycodes) {
+ rc = -ENOMEM;
+ goto err_alloc_mem;
+ }
+
+ platform_set_drvdata(pdev, kp);
+
+ kp->pdata = pdata;
+ kp->dev = &pdev->dev;
+ kp->keycodes = keycodes;
+ kp->pm_chip = pm_chip;
+
+ kp->input = input_allocate_device();
+ if (!kp->input) {
+ dev_err(&pdev->dev, "unable to allocate input device\n");
+ rc = -ENOMEM;
+ goto err_alloc_device;
+ }
+
+ kp->key_sense_irq = platform_get_irq(pdev, 0);
+ if (kp->key_sense_irq < 0) {
+ dev_err(&pdev->dev, "unable to get keypad sense irq\n");
+ rc = -ENXIO;
+ goto err_get_irq;
+ }
+
+ kp->key_stuck_irq = platform_get_irq(pdev, 1);
+ if (kp->key_stuck_irq < 0) {
+ dev_err(&pdev->dev, "unable to get keypad stuck irq\n");
+ rc = -ENXIO;
+ goto err_get_irq;
+ }
+
+ if (pdata->input_name)
+ kp->input->name = pdata->input_name;
+ else
+ kp->input->name = "PMIC8058 keypad";
+
+ if (pdata->input_phys_device)
+ kp->input->phys = pdata->input_phys_device;
+ else
+ kp->input->phys = "pmic8058_keypad/input0";
+
+ kp->input->dev.parent = &pdev->dev;
+
+ kp->input->id.bustype = BUS_I2C;
+ kp->input->id.version = 0x0001;
+ kp->input->id.product = 0x0001;
+ kp->input->id.vendor = 0x0001;
+
+ kp->input->evbit[0] = BIT_MASK(EV_KEY);
+
+ if (pdata->rep)
+ __set_bit(EV_REP, kp->input->evbit);
+
+ kp->input->keycode = keycodes;
+ kp->input->keycodemax = PM8058_MATRIX_MAX_SIZE;
+ kp->input->keycodesize = sizeof(*keycodes);
+ kp->input->open = pmic8058_kp_open;
+ kp->input->close = pmic8058_kp_close;
+
+ matrix_keypad_build_keymap(keymap_data, PM8058_ROW_SHIFT,
+ kp->input->keycode, kp->input->keybit);
+
+ input_set_capability(kp->input, EV_MSC, MSC_SCAN);
+ input_set_drvdata(kp->input, kp);
+
+ /* initialize keypad state */
+ memset(kp->keystate, 0xff, sizeof(kp->keystate));
+ memset(kp->stuckstate, 0xff, sizeof(kp->stuckstate));
+
+ rc = pmic8058_kpd_init(kp);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "unable to initialize keypad controller\n");
+ goto err_kpd_init;
+ }
+
+ rc = request_any_context_irq(kp->key_sense_irq, pmic8058_kp_irq,
+ IRQF_TRIGGER_RISING, "pmic-keypad", kp);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "failed to request keypad sense irq\n");
+ goto err_req_sense_irq;
+ }
+ /* kp->open will enable the irq */
+ disable_irq(kp->key_sense_irq);
+
+ rc = request_any_context_irq(kp->key_stuck_irq, pmic8058_kp_stuck_irq,
+ IRQF_TRIGGER_RISING, "pmic-keypad-stuck", kp);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "failed to request keypad stuck irq\n");
+ goto err_req_stuck_irq;
+ }
+ /* kp->open will enable the irq */
+ disable_irq(kp->key_stuck_irq);
+
+ rc = pmic8058_kp_read_u8(kp, &ctrl_val, KEYP_CTRL);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "failed to read KEYP_CTRL register\n");
+ goto err_pmic_reg_read;
+ }
+
+ kp->ctrl_reg = ctrl_val;
+
+ rc = input_register_device(kp->input);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "unable to register keypad input device\n");
+ goto err_reg_input_dev;
+ }
+
+ device_init_wakeup(&pdev->dev, pdata->wakeup);
+
+ return 0;
+
+err_reg_input_dev:
+err_pmic_reg_read:
+ free_irq(kp->key_stuck_irq, NULL);
+err_req_stuck_irq:
+ free_irq(kp->key_sense_irq, NULL);
+err_req_sense_irq:
+err_kpd_init:
+err_get_irq:
+ input_free_device(kp->input);
+err_alloc_device:
+ kfree(keycodes);
+err_alloc_mem:
+ kfree(kp);
+ return rc;
+}
+
+static int __devexit pmic8058_kp_remove(struct platform_device *pdev)
+{
+ struct pmic8058_kp *kp = platform_get_drvdata(pdev);
+
+ device_init_wakeup(&pdev->dev, 0);
+ free_irq(kp->key_stuck_irq, NULL);
+ free_irq(kp->key_sense_irq, NULL);
+ input_unregister_device(kp->input);
+ kfree(kp->input->keycode);
+ kfree(kp);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int pmic8058_kp_suspend(struct device *dev)
+{
+ struct pmic8058_kp *kp = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(kp->key_sense_irq);
+
+ return 0;
+}
+
+static int pmic8058_kp_resume(struct device *dev)
+{
+ struct pmic8058_kp *kp = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(kp->key_sense_irq);
+
+ return 0;
+}
+
+static const struct dev_pm_ops pm8058_kp_pm_ops = {
+ .suspend = pmic8058_kp_suspend,
+ .resume = pmic8058_kp_resume,
+};
+#endif
+
+static struct platform_driver pmic8058_kp_driver = {
+ .probe = pmic8058_kp_probe,
+ .remove = __devexit_p(pmic8058_kp_remove),
+ .driver = {
+ .name = "pm8058-keypad",
+ .owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &pm8058_kp_pm_ops,
+#endif
+ },
+};
+
+static int __init pmic8058_kp_init(void)
+{
+ return platform_driver_register(&pmic8058_kp_driver);
+}
+module_init(pmic8058_kp_init);
+
+static void __exit pmic8058_kp_exit(void)
+{
+ platform_driver_unregister(&pmic8058_kp_driver);
+}
+module_exit(pmic8058_kp_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("PMIC8058 keypad driver");
+MODULE_VERSION("1.0");
+MODULE_ALIAS("platform:pmic8058_keypad");
+MODULE_AUTHOR("Trilok Soni <tsoni@codeaurora.org>");
diff --git a/include/linux/input/pmic8058-keypad.h b/include/linux/input/pmic8058-keypad.h
new file mode 100644
index 0000000..901f6cc
--- /dev/null
+++ b/include/linux/input/pmic8058-keypad.h
@@ -0,0 +1,58 @@
+/* Copyright (c) 2009-2010, 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.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#ifndef __PMIC8058_KEYPAD_H__
+#define __PMIC8058_KEYPAD_H__
+
+#include <linux/input/matrix_keypad.h>
+
+/**
+ * struct pmic8058_keypad_data - platform data for keypad
+ * @keymap_data - matrix keymap data
+ * @input_name - input device name
+ * @input_phys_device - input device name
+ * @num_cols - number of columns of keypad
+ * @num_rows - number of row of keypad
+ * @rows_gpio_start - starting PMIC gpio number for rows
+ * @cols_gpio_start - starting PMIC gpio number for cols
+ * @debounce_ms - debounce period in milliseconds
+ * @scan_delay_ms - scan delay in milliseconds
+ * @row_hold_ns - row hold period in nanoseconds
+ * @wakeup - configure keypad as wakeup
+ * @rep - enable or disable key repeat bit
+ */
+struct pmic8058_keypad_data {
+ const struct matrix_keymap_data *keymap_data;
+
+ const char *input_name;
+ const char *input_phys_device;
+
+ unsigned int num_cols;
+ unsigned int num_rows;
+
+ unsigned int rows_gpio_start;
+ unsigned int cols_gpio_start;
+
+ unsigned int debounce_ms;
+ unsigned int scan_delay_ms;
+ unsigned int row_hold_ns;
+
+ bool wakeup;
+ bool rep;
+};
+
+#endif /*__PMIC8058_KEYPAD_H__ */
--
1.7.0.2


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