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path: root/drivers/input/keyboard/adp5588-keys.c
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-rw-r--r--drivers/input/keyboard/adp5588-keys.c879
1 files changed, 879 insertions, 0 deletions
diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
new file mode 100644
index 000000000..7cd83c8e7
--- /dev/null
+++ b/drivers/input/keyboard/adp5588-keys.c
@@ -0,0 +1,879 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * File: drivers/input/keyboard/adp5588_keys.c
+ * Description: keypad driver for ADP5588 and ADP5587
+ * I2C QWERTY Keypad and IO Expander
+ * Bugs: Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Copyright (C) 2008-2010 Analog Devices Inc.
+ */
+
+#include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/input/matrix_keypad.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/ktime.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/timekeeping.h>
+
+#define DEV_ID 0x00 /* Device ID */
+#define CFG 0x01 /* Configuration Register1 */
+#define INT_STAT 0x02 /* Interrupt Status Register */
+#define KEY_LCK_EC_STAT 0x03 /* Key Lock and Event Counter Register */
+#define KEY_EVENTA 0x04 /* Key Event Register A */
+#define KEY_EVENTB 0x05 /* Key Event Register B */
+#define KEY_EVENTC 0x06 /* Key Event Register C */
+#define KEY_EVENTD 0x07 /* Key Event Register D */
+#define KEY_EVENTE 0x08 /* Key Event Register E */
+#define KEY_EVENTF 0x09 /* Key Event Register F */
+#define KEY_EVENTG 0x0A /* Key Event Register G */
+#define KEY_EVENTH 0x0B /* Key Event Register H */
+#define KEY_EVENTI 0x0C /* Key Event Register I */
+#define KEY_EVENTJ 0x0D /* Key Event Register J */
+#define KP_LCK_TMR 0x0E /* Keypad Lock1 to Lock2 Timer */
+#define UNLOCK1 0x0F /* Unlock Key1 */
+#define UNLOCK2 0x10 /* Unlock Key2 */
+#define GPIO_INT_STAT1 0x11 /* GPIO Interrupt Status */
+#define GPIO_INT_STAT2 0x12 /* GPIO Interrupt Status */
+#define GPIO_INT_STAT3 0x13 /* GPIO Interrupt Status */
+#define GPIO_DAT_STAT1 0x14 /* GPIO Data Status, Read twice to clear */
+#define GPIO_DAT_STAT2 0x15 /* GPIO Data Status, Read twice to clear */
+#define GPIO_DAT_STAT3 0x16 /* GPIO Data Status, Read twice to clear */
+#define GPIO_DAT_OUT1 0x17 /* GPIO DATA OUT */
+#define GPIO_DAT_OUT2 0x18 /* GPIO DATA OUT */
+#define GPIO_DAT_OUT3 0x19 /* GPIO DATA OUT */
+#define GPIO_INT_EN1 0x1A /* GPIO Interrupt Enable */
+#define GPIO_INT_EN2 0x1B /* GPIO Interrupt Enable */
+#define GPIO_INT_EN3 0x1C /* GPIO Interrupt Enable */
+#define KP_GPIO1 0x1D /* Keypad or GPIO Selection */
+#define KP_GPIO2 0x1E /* Keypad or GPIO Selection */
+#define KP_GPIO3 0x1F /* Keypad or GPIO Selection */
+#define GPI_EM1 0x20 /* GPI Event Mode 1 */
+#define GPI_EM2 0x21 /* GPI Event Mode 2 */
+#define GPI_EM3 0x22 /* GPI Event Mode 3 */
+#define GPIO_DIR1 0x23 /* GPIO Data Direction */
+#define GPIO_DIR2 0x24 /* GPIO Data Direction */
+#define GPIO_DIR3 0x25 /* GPIO Data Direction */
+#define GPIO_INT_LVL1 0x26 /* GPIO Edge/Level Detect */
+#define GPIO_INT_LVL2 0x27 /* GPIO Edge/Level Detect */
+#define GPIO_INT_LVL3 0x28 /* GPIO Edge/Level Detect */
+#define DEBOUNCE_DIS1 0x29 /* Debounce Disable */
+#define DEBOUNCE_DIS2 0x2A /* Debounce Disable */
+#define DEBOUNCE_DIS3 0x2B /* Debounce Disable */
+#define GPIO_PULL1 0x2C /* GPIO Pull Disable */
+#define GPIO_PULL2 0x2D /* GPIO Pull Disable */
+#define GPIO_PULL3 0x2E /* GPIO Pull Disable */
+#define CMP_CFG_STAT 0x30 /* Comparator Configuration and Status Register */
+#define CMP_CONFG_SENS1 0x31 /* Sensor1 Comparator Configuration Register */
+#define CMP_CONFG_SENS2 0x32 /* L2 Light Sensor Reference Level, Output Falling for Sensor 1 */
+#define CMP1_LVL2_TRIP 0x33 /* L2 Light Sensor Hysteresis (Active when Output Rising) for Sensor 1 */
+#define CMP1_LVL2_HYS 0x34 /* L3 Light Sensor Reference Level, Output Falling For Sensor 1 */
+#define CMP1_LVL3_TRIP 0x35 /* L3 Light Sensor Hysteresis (Active when Output Rising) For Sensor 1 */
+#define CMP1_LVL3_HYS 0x36 /* Sensor 2 Comparator Configuration Register */
+#define CMP2_LVL2_TRIP 0x37 /* L2 Light Sensor Reference Level, Output Falling for Sensor 2 */
+#define CMP2_LVL2_HYS 0x38 /* L2 Light Sensor Hysteresis (Active when Output Rising) for Sensor 2 */
+#define CMP2_LVL3_TRIP 0x39 /* L3 Light Sensor Reference Level, Output Falling For Sensor 2 */
+#define CMP2_LVL3_HYS 0x3A /* L3 Light Sensor Hysteresis (Active when Output Rising) For Sensor 2 */
+#define CMP1_ADC_DAT_R1 0x3B /* Comparator 1 ADC data Register1 */
+#define CMP1_ADC_DAT_R2 0x3C /* Comparator 1 ADC data Register2 */
+#define CMP2_ADC_DAT_R1 0x3D /* Comparator 2 ADC data Register1 */
+#define CMP2_ADC_DAT_R2 0x3E /* Comparator 2 ADC data Register2 */
+
+#define ADP5588_DEVICE_ID_MASK 0xF
+
+ /* Configuration Register1 */
+#define ADP5588_AUTO_INC BIT(7)
+#define ADP5588_GPIEM_CFG BIT(6)
+#define ADP5588_OVR_FLOW_M BIT(5)
+#define ADP5588_INT_CFG BIT(4)
+#define ADP5588_OVR_FLOW_IEN BIT(3)
+#define ADP5588_K_LCK_IM BIT(2)
+#define ADP5588_GPI_IEN BIT(1)
+#define ADP5588_KE_IEN BIT(0)
+
+/* Interrupt Status Register */
+#define ADP5588_CMP2_INT BIT(5)
+#define ADP5588_CMP1_INT BIT(4)
+#define ADP5588_OVR_FLOW_INT BIT(3)
+#define ADP5588_K_LCK_INT BIT(2)
+#define ADP5588_GPI_INT BIT(1)
+#define ADP5588_KE_INT BIT(0)
+
+/* Key Lock and Event Counter Register */
+#define ADP5588_K_LCK_EN BIT(6)
+#define ADP5588_LCK21 0x30
+#define ADP5588_KEC GENMASK(3, 0)
+
+#define ADP5588_MAXGPIO 18
+#define ADP5588_BANK(offs) ((offs) >> 3)
+#define ADP5588_BIT(offs) (1u << ((offs) & 0x7))
+
+/* Put one of these structures in i2c_board_info platform_data */
+
+/*
+ * 128 so it fits matrix-keymap maximum number of keys when the full
+ * 10cols * 8rows are used.
+ */
+#define ADP5588_KEYMAPSIZE 128
+
+#define GPI_PIN_ROW0 97
+#define GPI_PIN_ROW1 98
+#define GPI_PIN_ROW2 99
+#define GPI_PIN_ROW3 100
+#define GPI_PIN_ROW4 101
+#define GPI_PIN_ROW5 102
+#define GPI_PIN_ROW6 103
+#define GPI_PIN_ROW7 104
+#define GPI_PIN_COL0 105
+#define GPI_PIN_COL1 106
+#define GPI_PIN_COL2 107
+#define GPI_PIN_COL3 108
+#define GPI_PIN_COL4 109
+#define GPI_PIN_COL5 110
+#define GPI_PIN_COL6 111
+#define GPI_PIN_COL7 112
+#define GPI_PIN_COL8 113
+#define GPI_PIN_COL9 114
+
+#define GPI_PIN_ROW_BASE GPI_PIN_ROW0
+#define GPI_PIN_ROW_END GPI_PIN_ROW7
+#define GPI_PIN_COL_BASE GPI_PIN_COL0
+#define GPI_PIN_COL_END GPI_PIN_COL9
+
+#define GPI_PIN_BASE GPI_PIN_ROW_BASE
+#define GPI_PIN_END GPI_PIN_COL_END
+
+#define ADP5588_ROWS_MAX (GPI_PIN_ROW7 - GPI_PIN_ROW0 + 1)
+#define ADP5588_COLS_MAX (GPI_PIN_COL9 - GPI_PIN_COL0 + 1)
+
+#define ADP5588_GPIMAPSIZE_MAX (GPI_PIN_END - GPI_PIN_BASE + 1)
+
+/* Key Event Register xy */
+#define KEY_EV_PRESSED BIT(7)
+#define KEY_EV_MASK GENMASK(6, 0)
+
+#define KP_SEL(x) (BIT(x) - 1) /* 2^x-1 */
+
+#define KEYP_MAX_EVENT 10
+
+/*
+ * Early pre 4.0 Silicon required to delay readout by at least 25ms,
+ * since the Event Counter Register updated 25ms after the interrupt
+ * asserted.
+ */
+#define WA_DELAYED_READOUT_REVID(rev) ((rev) < 4)
+#define WA_DELAYED_READOUT_TIME 25
+
+#define ADP5588_INVALID_HWIRQ (~0UL)
+
+struct adp5588_kpad {
+ struct i2c_client *client;
+ struct input_dev *input;
+ ktime_t irq_time;
+ unsigned long delay;
+ u32 row_shift;
+ u32 rows;
+ u32 cols;
+ u32 unlock_keys[2];
+ int nkeys_unlock;
+ unsigned short keycode[ADP5588_KEYMAPSIZE];
+ unsigned char gpiomap[ADP5588_MAXGPIO];
+ struct gpio_chip gc;
+ struct mutex gpio_lock; /* Protect cached dir, dat_out */
+ u8 dat_out[3];
+ u8 dir[3];
+ u8 int_en[3];
+ u8 irq_mask[3];
+ u8 pull_dis[3];
+};
+
+static int adp5588_read(struct i2c_client *client, u8 reg)
+{
+ int ret = i2c_smbus_read_byte_data(client, reg);
+
+ if (ret < 0)
+ dev_err(&client->dev, "Read Error\n");
+
+ return ret;
+}
+
+static int adp5588_write(struct i2c_client *client, u8 reg, u8 val)
+{
+ return i2c_smbus_write_byte_data(client, reg, val);
+}
+
+static int adp5588_gpio_get_value(struct gpio_chip *chip, unsigned int off)
+{
+ struct adp5588_kpad *kpad = gpiochip_get_data(chip);
+ unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]);
+ unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]);
+ int val;
+
+ mutex_lock(&kpad->gpio_lock);
+
+ if (kpad->dir[bank] & bit)
+ val = kpad->dat_out[bank];
+ else
+ val = adp5588_read(kpad->client, GPIO_DAT_STAT1 + bank);
+
+ mutex_unlock(&kpad->gpio_lock);
+
+ return !!(val & bit);
+}
+
+static void adp5588_gpio_set_value(struct gpio_chip *chip,
+ unsigned int off, int val)
+{
+ struct adp5588_kpad *kpad = gpiochip_get_data(chip);
+ unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]);
+ unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]);
+
+ mutex_lock(&kpad->gpio_lock);
+
+ if (val)
+ kpad->dat_out[bank] |= bit;
+ else
+ kpad->dat_out[bank] &= ~bit;
+
+ adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank, kpad->dat_out[bank]);
+
+ mutex_unlock(&kpad->gpio_lock);
+}
+
+static int adp5588_gpio_set_config(struct gpio_chip *chip, unsigned int off,
+ unsigned long config)
+{
+ struct adp5588_kpad *kpad = gpiochip_get_data(chip);
+ unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]);
+ unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]);
+ bool pull_disable;
+ int ret;
+
+ switch (pinconf_to_config_param(config)) {
+ case PIN_CONFIG_BIAS_PULL_UP:
+ pull_disable = false;
+ break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ pull_disable = true;
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+
+ mutex_lock(&kpad->gpio_lock);
+
+ if (pull_disable)
+ kpad->pull_dis[bank] |= bit;
+ else
+ kpad->pull_dis[bank] &= bit;
+
+ ret = adp5588_write(kpad->client, GPIO_PULL1 + bank,
+ kpad->pull_dis[bank]);
+
+ mutex_unlock(&kpad->gpio_lock);
+
+ return ret;
+}
+
+static int adp5588_gpio_direction_input(struct gpio_chip *chip, unsigned int off)
+{
+ struct adp5588_kpad *kpad = gpiochip_get_data(chip);
+ unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]);
+ unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]);
+ int ret;
+
+ mutex_lock(&kpad->gpio_lock);
+
+ kpad->dir[bank] &= ~bit;
+ ret = adp5588_write(kpad->client, GPIO_DIR1 + bank, kpad->dir[bank]);
+
+ mutex_unlock(&kpad->gpio_lock);
+
+ return ret;
+}
+
+static int adp5588_gpio_direction_output(struct gpio_chip *chip,
+ unsigned int off, int val)
+{
+ struct adp5588_kpad *kpad = gpiochip_get_data(chip);
+ unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]);
+ unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]);
+ int ret;
+
+ mutex_lock(&kpad->gpio_lock);
+
+ kpad->dir[bank] |= bit;
+
+ if (val)
+ kpad->dat_out[bank] |= bit;
+ else
+ kpad->dat_out[bank] &= ~bit;
+
+ ret = adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank,
+ kpad->dat_out[bank]);
+ if (ret)
+ goto out_unlock;
+
+ ret = adp5588_write(kpad->client, GPIO_DIR1 + bank, kpad->dir[bank]);
+
+out_unlock:
+ mutex_unlock(&kpad->gpio_lock);
+
+ return ret;
+}
+
+static int adp5588_build_gpiomap(struct adp5588_kpad *kpad)
+{
+ bool pin_used[ADP5588_MAXGPIO];
+ int n_unused = 0;
+ int i;
+
+ memset(pin_used, 0, sizeof(pin_used));
+
+ for (i = 0; i < kpad->rows; i++)
+ pin_used[i] = true;
+
+ for (i = 0; i < kpad->cols; i++)
+ pin_used[i + GPI_PIN_COL_BASE - GPI_PIN_BASE] = true;
+
+ for (i = 0; i < ADP5588_MAXGPIO; i++)
+ if (!pin_used[i])
+ kpad->gpiomap[n_unused++] = i;
+
+ return n_unused;
+}
+
+static void adp5588_irq_bus_lock(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct adp5588_kpad *kpad = gpiochip_get_data(gc);
+
+ mutex_lock(&kpad->gpio_lock);
+}
+
+static void adp5588_irq_bus_sync_unlock(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct adp5588_kpad *kpad = gpiochip_get_data(gc);
+ int i;
+
+ for (i = 0; i <= ADP5588_BANK(ADP5588_MAXGPIO); i++) {
+ if (kpad->int_en[i] ^ kpad->irq_mask[i]) {
+ kpad->int_en[i] = kpad->irq_mask[i];
+ adp5588_write(kpad->client, GPI_EM1 + i, kpad->int_en[i]);
+ }
+ }
+
+ mutex_unlock(&kpad->gpio_lock);
+}
+
+static void adp5588_irq_mask(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct adp5588_kpad *kpad = gpiochip_get_data(gc);
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+ unsigned long real_irq = kpad->gpiomap[hwirq];
+
+ kpad->irq_mask[ADP5588_BANK(real_irq)] &= ~ADP5588_BIT(real_irq);
+ gpiochip_disable_irq(gc, hwirq);
+}
+
+static void adp5588_irq_unmask(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct adp5588_kpad *kpad = gpiochip_get_data(gc);
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+ unsigned long real_irq = kpad->gpiomap[hwirq];
+
+ gpiochip_enable_irq(gc, hwirq);
+ kpad->irq_mask[ADP5588_BANK(real_irq)] |= ADP5588_BIT(real_irq);
+}
+
+static int adp5588_irq_set_type(struct irq_data *d, unsigned int type)
+{
+ if (!(type & IRQ_TYPE_EDGE_BOTH))
+ return -EINVAL;
+
+ irq_set_handler_locked(d, handle_edge_irq);
+
+ return 0;
+}
+
+static const struct irq_chip adp5588_irq_chip = {
+ .name = "adp5588",
+ .irq_mask = adp5588_irq_mask,
+ .irq_unmask = adp5588_irq_unmask,
+ .irq_bus_lock = adp5588_irq_bus_lock,
+ .irq_bus_sync_unlock = adp5588_irq_bus_sync_unlock,
+ .irq_set_type = adp5588_irq_set_type,
+ .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE,
+ GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
+static int adp5588_gpio_add(struct adp5588_kpad *kpad)
+{
+ struct device *dev = &kpad->client->dev;
+ struct gpio_irq_chip *girq;
+ int i, error;
+
+ kpad->gc.ngpio = adp5588_build_gpiomap(kpad);
+ if (kpad->gc.ngpio == 0) {
+ dev_info(dev, "No unused gpios left to export\n");
+ return 0;
+ }
+
+ kpad->gc.parent = &kpad->client->dev;
+ kpad->gc.direction_input = adp5588_gpio_direction_input;
+ kpad->gc.direction_output = adp5588_gpio_direction_output;
+ kpad->gc.get = adp5588_gpio_get_value;
+ kpad->gc.set = adp5588_gpio_set_value;
+ kpad->gc.set_config = adp5588_gpio_set_config;
+ kpad->gc.can_sleep = 1;
+
+ kpad->gc.base = -1;
+ kpad->gc.label = kpad->client->name;
+ kpad->gc.owner = THIS_MODULE;
+
+ girq = &kpad->gc.irq;
+ gpio_irq_chip_set_chip(girq, &adp5588_irq_chip);
+ girq->handler = handle_bad_irq;
+ girq->threaded = true;
+
+ mutex_init(&kpad->gpio_lock);
+
+ error = devm_gpiochip_add_data(dev, &kpad->gc, kpad);
+ if (error) {
+ dev_err(dev, "gpiochip_add failed: %d\n", error);
+ return error;
+ }
+
+ for (i = 0; i <= ADP5588_BANK(ADP5588_MAXGPIO); i++) {
+ kpad->dat_out[i] = adp5588_read(kpad->client,
+ GPIO_DAT_OUT1 + i);
+ kpad->dir[i] = adp5588_read(kpad->client, GPIO_DIR1 + i);
+ kpad->pull_dis[i] = adp5588_read(kpad->client, GPIO_PULL1 + i);
+ }
+
+ return 0;
+}
+
+static unsigned long adp5588_gpiomap_get_hwirq(struct device *dev,
+ const u8 *map, unsigned int gpio,
+ unsigned int ngpios)
+{
+ unsigned int hwirq;
+
+ for (hwirq = 0; hwirq < ngpios; hwirq++)
+ if (map[hwirq] == gpio)
+ return hwirq;
+
+ /* should never happen */
+ dev_warn_ratelimited(dev, "could not find the hwirq for gpio(%u)\n", gpio);
+
+ return ADP5588_INVALID_HWIRQ;
+}
+
+static void adp5588_gpio_irq_handle(struct adp5588_kpad *kpad, int key_val,
+ int key_press)
+{
+ unsigned int irq, gpio = key_val - GPI_PIN_BASE, irq_type;
+ struct i2c_client *client = kpad->client;
+ struct irq_data *irqd;
+ unsigned long hwirq;
+
+ hwirq = adp5588_gpiomap_get_hwirq(&client->dev, kpad->gpiomap,
+ gpio, kpad->gc.ngpio);
+ if (hwirq == ADP5588_INVALID_HWIRQ) {
+ dev_err(&client->dev, "Could not get hwirq for key(%u)\n", key_val);
+ return;
+ }
+
+ irq = irq_find_mapping(kpad->gc.irq.domain, hwirq);
+ if (!irq)
+ return;
+
+ irqd = irq_get_irq_data(irq);
+ if (!irqd) {
+ dev_err(&client->dev, "Could not get irq(%u) data\n", irq);
+ return;
+ }
+
+ irq_type = irqd_get_trigger_type(irqd);
+
+ /*
+ * Default is active low which means key_press is asserted on
+ * the falling edge.
+ */
+ if ((irq_type & IRQ_TYPE_EDGE_RISING && !key_press) ||
+ (irq_type & IRQ_TYPE_EDGE_FALLING && key_press))
+ handle_nested_irq(irq);
+}
+
+static void adp5588_report_events(struct adp5588_kpad *kpad, int ev_cnt)
+{
+ int i;
+
+ for (i = 0; i < ev_cnt; i++) {
+ int key = adp5588_read(kpad->client, KEY_EVENTA + i);
+ int key_val = key & KEY_EV_MASK;
+ int key_press = key & KEY_EV_PRESSED;
+
+ if (key_val >= GPI_PIN_BASE && key_val <= GPI_PIN_END) {
+ /* gpio line used as IRQ source */
+ adp5588_gpio_irq_handle(kpad, key_val, key_press);
+ } else {
+ int row = (key_val - 1) / ADP5588_COLS_MAX;
+ int col = (key_val - 1) % ADP5588_COLS_MAX;
+ int code = MATRIX_SCAN_CODE(row, col, kpad->row_shift);
+
+ dev_dbg_ratelimited(&kpad->client->dev,
+ "report key(%d) r(%d) c(%d) code(%d)\n",
+ key_val, row, col, kpad->keycode[code]);
+
+ input_report_key(kpad->input,
+ kpad->keycode[code], key_press);
+ }
+ }
+}
+
+static irqreturn_t adp5588_hard_irq(int irq, void *handle)
+{
+ struct adp5588_kpad *kpad = handle;
+
+ kpad->irq_time = ktime_get();
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t adp5588_thread_irq(int irq, void *handle)
+{
+ struct adp5588_kpad *kpad = handle;
+ struct i2c_client *client = kpad->client;
+ ktime_t target_time, now;
+ unsigned long delay;
+ int status, ev_cnt;
+
+ /*
+ * Readout needs to wait for at least 25ms after the notification
+ * for REVID < 4.
+ */
+ if (kpad->delay) {
+ target_time = ktime_add_ms(kpad->irq_time, kpad->delay);
+ now = ktime_get();
+ if (ktime_before(now, target_time)) {
+ delay = ktime_to_us(ktime_sub(target_time, now));
+ usleep_range(delay, delay + 1000);
+ }
+ }
+
+ status = adp5588_read(client, INT_STAT);
+
+ if (status & ADP5588_OVR_FLOW_INT) /* Unlikely and should never happen */
+ dev_err(&client->dev, "Event Overflow Error\n");
+
+ if (status & ADP5588_KE_INT) {
+ ev_cnt = adp5588_read(client, KEY_LCK_EC_STAT) & ADP5588_KEC;
+ if (ev_cnt) {
+ adp5588_report_events(kpad, ev_cnt);
+ input_sync(kpad->input);
+ }
+ }
+
+ adp5588_write(client, INT_STAT, status); /* Status is W1C */
+
+ return IRQ_HANDLED;
+}
+
+static int adp5588_setup(struct adp5588_kpad *kpad)
+{
+ struct i2c_client *client = kpad->client;
+ int i, ret;
+
+ ret = adp5588_write(client, KP_GPIO1, KP_SEL(kpad->rows));
+ if (ret)
+ return ret;
+
+ ret = adp5588_write(client, KP_GPIO2, KP_SEL(kpad->cols) & 0xFF);
+ if (ret)
+ return ret;
+
+ ret = adp5588_write(client, KP_GPIO3, KP_SEL(kpad->cols) >> 8);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < kpad->nkeys_unlock; i++) {
+ ret = adp5588_write(client, UNLOCK1 + i, kpad->unlock_keys[i]);
+ if (ret)
+ return ret;
+ }
+
+ if (kpad->nkeys_unlock) {
+ ret = adp5588_write(client, KEY_LCK_EC_STAT, ADP5588_K_LCK_EN);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; i < KEYP_MAX_EVENT; i++) {
+ ret = adp5588_read(client, KEY_EVENTA);
+ if (ret)
+ return ret;
+ }
+
+ ret = adp5588_write(client, INT_STAT,
+ ADP5588_CMP2_INT | ADP5588_CMP1_INT |
+ ADP5588_OVR_FLOW_INT | ADP5588_K_LCK_INT |
+ ADP5588_GPI_INT | ADP5588_KE_INT); /* Status is W1C */
+ if (ret)
+ return ret;
+
+ return adp5588_write(client, CFG, ADP5588_INT_CFG |
+ ADP5588_OVR_FLOW_IEN | ADP5588_KE_IEN);
+}
+
+static int adp5588_fw_parse(struct adp5588_kpad *kpad)
+{
+ struct i2c_client *client = kpad->client;
+ int ret, i;
+
+ ret = matrix_keypad_parse_properties(&client->dev, &kpad->rows,
+ &kpad->cols);
+ if (ret)
+ return ret;
+
+ if (kpad->rows > ADP5588_ROWS_MAX || kpad->cols > ADP5588_COLS_MAX) {
+ dev_err(&client->dev, "Invalid nr of rows(%u) or cols(%u)\n",
+ kpad->rows, kpad->cols);
+ return -EINVAL;
+ }
+
+ ret = matrix_keypad_build_keymap(NULL, NULL, kpad->rows, kpad->cols,
+ kpad->keycode, kpad->input);
+ if (ret)
+ return ret;
+
+ kpad->row_shift = get_count_order(kpad->cols);
+
+ if (device_property_read_bool(&client->dev, "autorepeat"))
+ __set_bit(EV_REP, kpad->input->evbit);
+
+ kpad->nkeys_unlock = device_property_count_u32(&client->dev,
+ "adi,unlock-keys");
+ if (kpad->nkeys_unlock <= 0) {
+ /* so that we don't end up enabling key lock */
+ kpad->nkeys_unlock = 0;
+ return 0;
+ }
+
+ if (kpad->nkeys_unlock > ARRAY_SIZE(kpad->unlock_keys)) {
+ dev_err(&client->dev, "number of unlock keys(%d) > (%zu)\n",
+ kpad->nkeys_unlock, ARRAY_SIZE(kpad->unlock_keys));
+ return -EINVAL;
+ }
+
+ ret = device_property_read_u32_array(&client->dev, "adi,unlock-keys",
+ kpad->unlock_keys,
+ kpad->nkeys_unlock);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < kpad->nkeys_unlock; i++) {
+ /*
+ * Even though it should be possible (as stated in the datasheet)
+ * to use GPIs (which are part of the keys event) as unlock keys,
+ * it was not working at all and was leading to overflow events
+ * at some point. Hence, for now, let's just allow keys which are
+ * part of keypad matrix to be used and if a reliable way of
+ * using GPIs is found, this condition can be removed/lightened.
+ */
+ if (kpad->unlock_keys[i] >= kpad->cols * kpad->rows) {
+ dev_err(&client->dev, "Invalid unlock key(%d)\n",
+ kpad->unlock_keys[i]);
+ return -EINVAL;
+ }
+
+ /*
+ * Firmware properties keys start from 0 but on the device they
+ * start from 1.
+ */
+ kpad->unlock_keys[i] += 1;
+ }
+
+ return 0;
+}
+
+static void adp5588_disable_regulator(void *reg)
+{
+ regulator_disable(reg);
+}
+
+static int adp5588_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct adp5588_kpad *kpad;
+ struct input_dev *input;
+ struct gpio_desc *gpio;
+ struct regulator *vcc;
+ unsigned int revid;
+ int ret;
+ int error;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_BYTE_DATA)) {
+ dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
+ return -EIO;
+ }
+
+ kpad = devm_kzalloc(&client->dev, sizeof(*kpad), GFP_KERNEL);
+ if (!kpad)
+ return -ENOMEM;
+
+ input = devm_input_allocate_device(&client->dev);
+ if (!input)
+ return -ENOMEM;
+
+ kpad->client = client;
+ kpad->input = input;
+
+ error = adp5588_fw_parse(kpad);
+ if (error)
+ return error;
+
+ vcc = devm_regulator_get(&client->dev, "vcc");
+ if (IS_ERR(vcc))
+ return PTR_ERR(vcc);
+
+ error = regulator_enable(vcc);
+ if (error)
+ return error;
+
+ error = devm_add_action_or_reset(&client->dev,
+ adp5588_disable_regulator, vcc);
+ if (error)
+ return error;
+
+ gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(gpio))
+ return PTR_ERR(gpio);
+
+ if (gpio) {
+ fsleep(30);
+ gpiod_set_value_cansleep(gpio, 0);
+ fsleep(60);
+ }
+
+ ret = adp5588_read(client, DEV_ID);
+ if (ret < 0)
+ return ret;
+
+ revid = ret & ADP5588_DEVICE_ID_MASK;
+ if (WA_DELAYED_READOUT_REVID(revid))
+ kpad->delay = msecs_to_jiffies(WA_DELAYED_READOUT_TIME);
+
+ input->name = client->name;
+ input->phys = "adp5588-keys/input0";
+
+ input_set_drvdata(input, kpad);
+
+ input->id.bustype = BUS_I2C;
+ input->id.vendor = 0x0001;
+ input->id.product = 0x0001;
+ input->id.version = revid;
+
+ error = input_register_device(input);
+ if (error) {
+ dev_err(&client->dev, "unable to register input device: %d\n",
+ error);
+ return error;
+ }
+
+ error = adp5588_setup(kpad);
+ if (error)
+ return error;
+
+ error = adp5588_gpio_add(kpad);
+ if (error)
+ return error;
+
+ error = devm_request_threaded_irq(&client->dev, client->irq,
+ adp5588_hard_irq, adp5588_thread_irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ client->dev.driver->name, kpad);
+ if (error) {
+ dev_err(&client->dev, "failed to request irq %d: %d\n",
+ client->irq, error);
+ return error;
+ }
+
+ dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq);
+ return 0;
+}
+
+static void adp5588_remove(struct i2c_client *client)
+{
+ adp5588_write(client, CFG, 0);
+
+ /* all resources will be freed by devm */
+}
+
+static int adp5588_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+
+ disable_irq(client->irq);
+
+ return 0;
+}
+
+static int adp5588_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+
+ enable_irq(client->irq);
+
+ return 0;
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(adp5588_dev_pm_ops, adp5588_suspend, adp5588_resume);
+
+static const struct i2c_device_id adp5588_id[] = {
+ { "adp5588-keys", 0 },
+ { "adp5587-keys", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, adp5588_id);
+
+static const struct of_device_id adp5588_of_match[] = {
+ { .compatible = "adi,adp5588" },
+ { .compatible = "adi,adp5587" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, adp5588_of_match);
+
+static struct i2c_driver adp5588_driver = {
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .of_match_table = adp5588_of_match,
+ .pm = pm_sleep_ptr(&adp5588_dev_pm_ops),
+ },
+ .probe = adp5588_probe,
+ .remove = adp5588_remove,
+ .id_table = adp5588_id,
+};
+
+module_i2c_driver(adp5588_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("ADP5588/87 Keypad driver");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 21:35:46 +0000