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input: atmel_mxt_ts: put device in LPM from T7 and T9

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Signed-off-by: Amy Maloche <amaloche@codeaurora.org>
This commit is contained in:
Amy Maloche
2011-09-15 16:46:57 -07:00
committed by Stephen Boyd
parent 95b98f25a8
commit 33f1771e6d
1 changed files with 94 additions and 16 deletions
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110
drivers/input/touchscreen/atmel_mxt_ts.c
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@@ -234,6 +234,9 @@
#define MXT_MAX_FINGER 10
#define MXT_BUFF_SIZE 100
#define T7_DATA_SIZE 3
struct mxt_info {
u8 family_id;
u8 variant_id;
@@ -285,6 +288,8 @@ struct mxt_data {
#if defined(CONFIG_HAS_EARLYSUSPEND)
struct early_suspend early_suspend;
#endif
u8 t7_data[T7_DATA_SIZE];
u8 t9_ctrl;
};
static bool mxt_object_readable(unsigned int type)
@@ -865,7 +870,7 @@ static int mxt_initialize(struct mxt_data *data)
{
struct i2c_client *client = data->client;
struct mxt_info *info = &data->info;
int error;
int error, i;
int timeout_counter = 0;
u8 val;
u8 command_register;
@@ -892,6 +897,23 @@ static int mxt_initialize(struct mxt_data *data)
if (error)
return error;
/* Store T7 and T9 locally, used in suspend/resume operations */
for (i = 0; i < T7_DATA_SIZE; i++) {
error = mxt_read_object(data, MXT_GEN_POWER, i,
&data->t7_data[i]);
if (error < 0) {
dev_err(&client->dev,
"failed to save current power state\n");
return error;
}
}
error = mxt_read_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_CTRL,
&data->t9_ctrl);
if (error < 0) {
dev_err(&client->dev, "failed to save current touch object\n");
return error;
}
mxt_handle_pdata(data);
/* Backup to memory */
@@ -1123,25 +1145,63 @@ static const struct attribute_group mxt_attr_group = {
.attrs = mxt_attrs,
};
static void mxt_start(struct mxt_data *data)
static int mxt_start(struct mxt_data *data)
{
/* Touch enable */
mxt_write_object(data,
MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
int i, error;
/* restore the old power state values and reenable touch */
for (i = 0; i < T7_DATA_SIZE; i++) {
error = mxt_write_object(data, MXT_GEN_POWER, i,
data->t7_data[i]);
if (error < 0) {
dev_err(&data->client->dev,
"failed to restore old power state\n");
return error;
}
}
error = mxt_write_object(data,
MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, data->t9_ctrl);
if (error < 0) {
dev_err(&data->client->dev, "failed to restore touch\n");
return error;
}
return 0;
}
static void mxt_stop(struct mxt_data *data)
static int mxt_stop(struct mxt_data *data)
{
/* Touch disable */
mxt_write_object(data,
MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
int i, error;
/* configure deep sleep mode and disable touch */
for (i = 0; i < T7_DATA_SIZE; i++) {
error = mxt_write_object(data, MXT_GEN_POWER, i, 0);
if (error < 0) {
dev_err(&data->client->dev,
"failed to configure deep sleep mode\n");
return error;
}
}
error = mxt_write_object(data,
MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0);
if (error < 0) {
dev_err(&data->client->dev,
"failed to disable touch\n");
return error;
}
return 0;
}
static int mxt_input_open(struct input_dev *dev)
{
struct mxt_data *data = input_get_drvdata(dev);
int error;
mxt_start(data);
error = mxt_start(data);
if (error < 0) {
dev_err(&data->client->dev, "mxt_start failed in input_open\n");
return error;
}
return 0;
}
@@ -1149,8 +1209,12 @@ static int mxt_input_open(struct input_dev *dev)
static void mxt_input_close(struct input_dev *dev)
{
struct mxt_data *data = input_get_drvdata(dev);
int error;
error = mxt_stop(data);
if (error < 0)
dev_err(&data->client->dev, "mxt_stop failed in input_close\n");
mxt_stop(data);
}
static int mxt_power_on(struct mxt_data *data, bool on)
@@ -1288,11 +1352,19 @@ static int mxt_suspend(struct device *dev)
struct i2c_client *client = to_i2c_client(dev);
struct mxt_data *data = i2c_get_clientdata(client);
struct input_dev *input_dev = data->input_dev;
int error;
mutex_lock(&input_dev->mutex);
if (input_dev->users)
mxt_stop(data);
if (input_dev->users) {
error = mxt_stop(data);
if (error < 0) {
dev_err(&client->dev, "mxt_stop failed in suspend\n");
mutex_unlock(&input_dev->mutex);
return error;
}
}
mutex_unlock(&input_dev->mutex);
@@ -1304,7 +1376,7 @@ static int mxt_resume(struct device *dev)
struct i2c_client *client = to_i2c_client(dev);
struct mxt_data *data = i2c_get_clientdata(client);
struct input_dev *input_dev = data->input_dev;
int error;
/* Soft reset */
mxt_write_object(data, MXT_GEN_COMMAND_T6,
MXT_COMMAND_RESET, 1);
@@ -1313,8 +1385,14 @@ static int mxt_resume(struct device *dev)
mutex_lock(&input_dev->mutex);
if (input_dev->users)
mxt_start(data);
if (input_dev->users) {
error = mxt_start(data);
if (error < 0) {
dev_err(&client->dev, "mxt_start failed in resume\n");
mutex_unlock(&input_dev->mutex);
return error;
}
}
mutex_unlock(&input_dev->mutex);