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Input: atmel_mxt_ts - improve T19 GPIO keys handling

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* The mapping of the GPIO numbers into the T19 status byte varies between
   different maXTouch chips. Some have up to 7 GPIOs. Allowing a keycode array
   of up to 8 items is simpler and more generic. So replace #define with
   configurable number of keys which also allows the removal of is_tp.
 * Rename platform data parameters to include "t19" to prevent confusion with
   T15 key array.
 * Probe aborts early on when pdata is NULL, so no need to check.
 * Move "int i" to beginning of function (mixed declarations and code)
 * Use API calls rather than __set_bit()
 * Remove unused dev variable.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Acked-by: Yufeng Shen <miletus@chromium.org>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Nick Dyer
2014-05-18 23:00:15 -07:00
committed by Dmitry Torokhov
parent 2cefdb1f0a
commit fb5e4c3ee1
3 changed files with 30 additions and 38 deletions
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44
drivers/input/touchscreen/atmel_mxt_ts.c
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@@ -180,12 +180,6 @@
#define MXT_FWRESET_TIME 175 /* msec */
/* MXT_SPT_GPIOPWM_T19 field */
#define MXT_GPIO0_MASK 0x04
#define MXT_GPIO1_MASK 0x08
#define MXT_GPIO2_MASK 0x10
#define MXT_GPIO3_MASK 0x20
/* Command to unlock bootloader */
#define MXT_UNLOCK_CMD_MSB 0xaa
#define MXT_UNLOCK_CMD_LSB 0xdc
@@ -250,7 +244,6 @@ struct mxt_data {
const struct mxt_platform_data *pdata;
struct mxt_object *object_table;
struct mxt_info info;
bool is_tp;
unsigned int irq;
unsigned int max_x;
@@ -515,15 +508,16 @@ static int mxt_write_object(struct mxt_data *data,
static void mxt_input_button(struct mxt_data *data, struct mxt_message *message)
{
struct input_dev *input = data->input_dev;
const struct mxt_platform_data *pdata = data->pdata;
bool button;
int i;
/* Active-low switch */
for (i = 0; i < MXT_NUM_GPIO; i++) {
if (data->pdata->key_map[i] == KEY_RESERVED)
for (i = 0; i < pdata->t19_num_keys; i++) {
if (pdata->t19_keymap[i] == KEY_RESERVED)
continue;
button = !(message->message[0] & MXT_GPIO0_MASK << i);
input_report_key(input, data->pdata->key_map[i], button);
button = !(message->message[0] & (1 << i));
input_report_key(input, pdata->t19_keymap[i], button);
}
}
@@ -1084,6 +1078,8 @@ static int mxt_probe(struct i2c_client *client,
struct input_dev *input_dev;
int error;
unsigned int num_mt_slots;
unsigned int mt_flags = 0;
int i;
if (!pdata)
return -EINVAL;
@@ -1096,10 +1092,7 @@ static int mxt_probe(struct i2c_client *client,
goto err_free_mem;
}
data->is_tp = pdata && pdata->is_tp;
input_dev->name = (data->is_tp) ? "Atmel maXTouch Touchpad" :
"Atmel maXTouch Touchscreen";
input_dev->name = "Atmel maXTouch Touchscreen";
snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
client->adapter->nr, client->addr);
@@ -1125,20 +1118,15 @@ static int mxt_probe(struct i2c_client *client,
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
if (data->is_tp) {
int i;
__set_bit(INPUT_PROP_POINTER, input_dev->propbit);
if (pdata->t19_num_keys) {
__set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
for (i = 0; i < MXT_NUM_GPIO; i++)
if (pdata->key_map[i] != KEY_RESERVED)
__set_bit(pdata->key_map[i], input_dev->keybit);
for (i = 0; i < pdata->t19_num_keys; i++)
if (pdata->t19_keymap[i] != KEY_RESERVED)
input_set_capability(input_dev, EV_KEY,
pdata->t19_keymap[i]);
__set_bit(BTN_TOOL_FINGER, input_dev->keybit);
__set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
__set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
__set_bit(BTN_TOOL_QUADTAP, input_dev->keybit);
__set_bit(BTN_TOOL_QUINTTAP, input_dev->keybit);
mt_flags |= INPUT_MT_POINTER;
input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
@@ -1146,6 +1134,8 @@ static int mxt_probe(struct i2c_client *client,
MXT_PIXELS_PER_MM);
input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
MXT_PIXELS_PER_MM);
input_dev->name = "Atmel maXTouch Touchpad";
}
/* For single touch */
@@ -1158,7 +1148,7 @@ static int mxt_probe(struct i2c_client *client,
/* For multi touch */
num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
error = input_mt_init_slots(input_dev, num_mt_slots, 0);
error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
if (error)
goto err_free_object;
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,