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-rw-r--r--drivers/input/keyboard/Kconfig2
-rw-r--r--drivers/input/keyboard/adp5588-keys.c274
2 files changed, 144 insertions, 132 deletions
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index 2c6cef222f9c..e445e760a41a 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -40,6 +40,8 @@ config KEYBOARD_ADP5520
config KEYBOARD_ADP5588
tristate "ADP5588/87 I2C QWERTY Keypad and IO Expander"
depends on I2C
+ select GPIOLIB
+ select GPIOLIB_IRQCHIP
help
Say Y here if you want to use a ADP5588/87 attached to your
system I2C bus.
diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
index e2719737360a..f5f7ddfe68be 100644
--- a/drivers/input/keyboard/adp5588-keys.c
+++ b/drivers/input/keyboard/adp5588-keys.c
@@ -40,21 +40,21 @@
#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;
unsigned short keycode[ADP5588_KEYMAPSIZE];
- const struct adp5588_gpi_map *gpimap;
- unsigned short gpimapsize;
-#ifdef CONFIG_GPIOLIB
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];
-#endif
+ u8 int_en[3];
+ u8 irq_mask[3];
};
static int adp5588_read(struct i2c_client *client, u8 reg)
@@ -72,7 +72,6 @@ static int adp5588_write(struct i2c_client *client, u8 reg, u8 val)
return i2c_smbus_write_byte_data(client, reg, val);
}
-#ifdef CONFIG_GPIOLIB
static int adp5588_gpio_get_value(struct gpio_chip *chip, unsigned off)
{
struct adp5588_kpad *kpad = gpiochip_get_data(chip);
@@ -171,9 +170,6 @@ static int adp5588_build_gpiomap(struct adp5588_kpad *kpad,
for (i = 0; i < pdata->cols; i++)
pin_used[i + GPI_PIN_COL_BASE - GPI_PIN_BASE] = true;
- for (i = 0; i < kpad->gpimapsize; i++)
- pin_used[kpad->gpimap[i].pin - GPI_PIN_BASE] = true;
-
for (i = 0; i < ADP5588_MAXGPIO; i++)
if (!pin_used[i])
kpad->gpiomap[n_unused++] = i;
@@ -196,11 +192,79 @@ static void adp5588_gpio_do_teardown(void *_kpad)
dev_warn(&kpad->client->dev, "teardown failed %d\n", error);
}
+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;
const struct adp5588_kpad_platform_data *pdata = dev_get_platdata(dev);
const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
+ struct gpio_irq_chip *girq;
int i, error;
if (!gpio_data)
@@ -212,6 +276,7 @@ static int adp5588_gpio_add(struct adp5588_kpad *kpad)
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;
@@ -223,6 +288,11 @@ static int adp5588_gpio_add(struct adp5588_kpad *kpad)
kpad->gc.owner = THIS_MODULE;
kpad->gc.names = gpio_data->names;
+ 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);
@@ -255,35 +325,73 @@ static int adp5588_gpio_add(struct adp5588_kpad *kpad)
return 0;
}
-#else
-static inline int adp5588_gpio_add(struct adp5588_kpad *kpad)
+static unsigned long adp5588_gpiomap_get_hwirq(struct device *dev,
+ const u8 *map, unsigned int gpio,
+ unsigned int ngpios)
{
- return 0;
+ 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);
}
-#endif
static void adp5588_report_events(struct adp5588_kpad *kpad, int ev_cnt)
{
- int i, j;
+ 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) {
- for (j = 0; j < kpad->gpimapsize; j++) {
- if (key_val == kpad->gpimap[j].pin) {
- input_report_switch(kpad->input,
- kpad->gpimap[j].sw_evt,
- key & KEY_EV_PRESSED);
- break;
- }
- }
- } else {
+ 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
input_report_key(kpad->input,
- kpad->keycode[key_val - 1],
- key & KEY_EV_PRESSED);
- }
+ kpad->keycode[key_val - 1], key_press);
}
}
@@ -341,7 +449,6 @@ static int adp5588_setup(struct i2c_client *client)
dev_get_platdata(&client->dev);
const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
int i, ret;
- unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0;
ret = adp5588_write(client, KP_GPIO1, KP_SEL(pdata->rows));
ret |= adp5588_write(client, KP_GPIO2, KP_SEL(pdata->cols) & 0xFF);
@@ -356,23 +463,6 @@ static int adp5588_setup(struct i2c_client *client)
for (i = 0; i < KEYP_MAX_EVENT; i++)
ret |= adp5588_read(client, Key_EVENTA);
- for (i = 0; i < pdata->gpimapsize; i++) {
- unsigned short pin = pdata->gpimap[i].pin;
-
- if (pin <= GPI_PIN_ROW_END) {
- evt_mode1 |= (1 << (pin - GPI_PIN_ROW_BASE));
- } else {
- evt_mode2 |= ((1 << (pin - GPI_PIN_COL_BASE)) & 0xFF);
- evt_mode3 |= ((1 << (pin - GPI_PIN_COL_BASE)) >> 8);
- }
- }
-
- if (pdata->gpimapsize) {
- ret |= adp5588_write(client, GPI_EM1, evt_mode1);
- ret |= adp5588_write(client, GPI_EM2, evt_mode2);
- ret |= adp5588_write(client, GPI_EM3, evt_mode3);
- }
-
if (gpio_data) {
for (i = 0; i <= ADP5588_BANK(ADP5588_MAXGPIO); i++) {
int pull_mask = gpio_data->pullup_dis_mask;
@@ -399,44 +489,6 @@ static int adp5588_setup(struct i2c_client *client)
return 0;
}
-static void adp5588_report_switch_state(struct adp5588_kpad *kpad)
-{
- int gpi_stat1 = adp5588_read(kpad->client, GPIO_DAT_STAT1);
- int gpi_stat2 = adp5588_read(kpad->client, GPIO_DAT_STAT2);
- int gpi_stat3 = adp5588_read(kpad->client, GPIO_DAT_STAT3);
- int gpi_stat_tmp, pin_loc;
- int i;
-
- for (i = 0; i < kpad->gpimapsize; i++) {
- unsigned short pin = kpad->gpimap[i].pin;
-
- if (pin <= GPI_PIN_ROW_END) {
- gpi_stat_tmp = gpi_stat1;
- pin_loc = pin - GPI_PIN_ROW_BASE;
- } else if ((pin - GPI_PIN_COL_BASE) < 8) {
- gpi_stat_tmp = gpi_stat2;
- pin_loc = pin - GPI_PIN_COL_BASE;
- } else {
- gpi_stat_tmp = gpi_stat3;
- pin_loc = pin - GPI_PIN_COL_BASE - 8;
- }
-
- if (gpi_stat_tmp < 0) {
- dev_err(&kpad->client->dev,
- "Can't read GPIO_DAT_STAT switch %d default to OFF\n",
- pin);
- gpi_stat_tmp = 0;
- }
-
- input_report_switch(kpad->input,
- kpad->gpimap[i].sw_evt,
- !(gpi_stat_tmp & (1 << pin_loc)));
- }
-
- input_sync(kpad->input);
-}
-
-
static int adp5588_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -469,37 +521,6 @@ static int adp5588_probe(struct i2c_client *client,
return -EINVAL;
}
- if (!pdata->gpimap && pdata->gpimapsize) {
- dev_err(&client->dev, "invalid gpimap from pdata\n");
- return -EINVAL;
- }
-
- if (pdata->gpimapsize > ADP5588_GPIMAPSIZE_MAX) {
- dev_err(&client->dev, "invalid gpimapsize\n");
- return -EINVAL;
- }
-
- for (i = 0; i < pdata->gpimapsize; i++) {
- unsigned short pin = pdata->gpimap[i].pin;
-
- if (pin < GPI_PIN_BASE || pin > GPI_PIN_END) {
- dev_err(&client->dev, "invalid gpi pin data\n");
- return -EINVAL;
- }
-
- if (pin <= GPI_PIN_ROW_END) {
- if (pin - GPI_PIN_ROW_BASE + 1 <= pdata->rows) {
- dev_err(&client->dev, "invalid gpi row data\n");
- return -EINVAL;
- }
- } else {
- if (pin - GPI_PIN_COL_BASE + 1 <= pdata->cols) {
- dev_err(&client->dev, "invalid gpi col data\n");
- return -EINVAL;
- }
- }
- }
-
if (!client->irq) {
dev_err(&client->dev, "no IRQ?\n");
return -EINVAL;
@@ -541,9 +562,6 @@ static int adp5588_probe(struct i2c_client *client,
memcpy(kpad->keycode, pdata->keymap,
pdata->keymapsize * input->keycodesize);
- kpad->gpimap = pdata->gpimap;
- kpad->gpimapsize = pdata->gpimapsize;
-
/* setup input device */
__set_bit(EV_KEY, input->evbit);
@@ -555,11 +573,6 @@ static int adp5588_probe(struct i2c_client *client,
__set_bit(kpad->keycode[i], input->keybit);
__clear_bit(KEY_RESERVED, input->keybit);
- if (kpad->gpimapsize)
- __set_bit(EV_SW, input->evbit);
- for (i = 0; i < kpad->gpimapsize; i++)
- __set_bit(kpad->gpimap[i].sw_evt, input->swbit);
-
error = input_register_device(input);
if (error) {
dev_err(&client->dev, "unable to register input device: %d\n",
@@ -567,6 +580,14 @@ static int adp5588_probe(struct i2c_client *client,
return error;
}
+ error = adp5588_setup(client);
+ 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,
@@ -577,17 +598,6 @@ static int adp5588_probe(struct i2c_client *client,
return error;
}
- error = adp5588_setup(client);
- if (error)
- return error;
-
- if (kpad->gpimapsize)
- adp5588_report_switch_state(kpad);
-
- error = adp5588_gpio_add(kpad);
- if (error)
- return error;
-
dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq);
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.