[PATCH 02/22] Input: atmel_mxt_ts - improve T19 GPIO keys handling

From: Nick Dyer
Date: Mon Mar 17 2014 - 13:36:10 EST

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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@xxxxxxxxxxx>
Acked-by: Yufeng Shen <miletus@xxxxxxxxxxxx>
Reviewed-by: Henrik Rydberg <rydberg@xxxxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 44 ++++++++++++-------------------
drivers/platform/chrome/chromeos_laptop.c | 17 +++++++-----
include/linux/i2c/atmel_mxt_ts.h | 7 ++---
3 files changed, 30 insertions(+), 38 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 7eb515c..65df362 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -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,
diff --git a/drivers/platform/chrome/chromeos_laptop.c b/drivers/platform/chrome/chromeos_laptop.c
index 78ed277..8026554 100644
--- a/drivers/platform/chrome/chromeos_laptop.c
+++ b/drivers/platform/chrome/chromeos_laptop.c
@@ -70,16 +70,22 @@ static struct i2c_board_info __initdata tsl2563_als_device = {
I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
};

+static int mxt_t19_keys[] = {
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ KEY_RESERVED,
+ BTN_LEFT
+};
+
static struct mxt_platform_data atmel_224s_tp_platform_data = {
.x_size = 102*20,
.y_size = 68*20,
.orient = MXT_VERTICAL_FLIP,
.irqflags = IRQF_TRIGGER_FALLING,
- .is_tp = true,
- .key_map = { KEY_RESERVED,
- KEY_RESERVED,
- KEY_RESERVED,
- BTN_LEFT },
+ .t19_num_keys = ARRAY_SIZE(mxt_t19_keys),
+ .t19_keymap = mxt_t19_keys,
.config = NULL,
.config_length = 0,
};
@@ -95,7 +101,6 @@ static struct mxt_platform_data atmel_1664s_platform_data = {
.y_size = 2560,
.orient = MXT_ROTATED_90_COUNTER,
.irqflags = IRQF_TRIGGER_FALLING,
- .is_tp = false,
.config = NULL,
.config_length = 0,
};
diff --git a/include/linux/i2c/atmel_mxt_ts.h b/include/linux/i2c/atmel_mxt_ts.h
index eff0cdc..d26080d 100644
--- a/include/linux/i2c/atmel_mxt_ts.h
+++ b/include/linux/i2c/atmel_mxt_ts.h
@@ -15,9 +15,6 @@

#include <linux/types.h>

-/* For key_map array */
-#define MXT_NUM_GPIO 4
-
/* Orient */
#define MXT_NORMAL 0x0
#define MXT_DIAGONAL 0x1
@@ -38,8 +35,8 @@ struct mxt_platform_data {
unsigned char orient;

unsigned long irqflags;
- bool is_tp;
- const unsigned int key_map[MXT_NUM_GPIO];
+ u8 t19_num_keys;
+ const unsigned int *t19_keymap;
};

#endif /* __LINUX_ATMEL_MXT_TS_H */
--
1.8.3.2

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Next message: Nick Dyer: "[PATCH 00/22] atmel_mxt_ts patches, already signed-off"
Previous message: Nick Dyer: "[PATCH 07/22] Input: atmel_mxt_ts - wait for CHG after bootloader resets"
In reply to: Nick Dyer: "[PATCH 07/22] Input: atmel_mxt_ts - wait for CHG after bootloader resets"
Next in thread: Nick Dyer: "[PATCH 06/22] Input: atmel_mxt_ts - wait for CHG assert in mxt_check_bootloader"
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