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Revert "Input: atmel_mxt_ts - use deep sleep mode when stopped"

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This reverts commit 9d469d033d.

It breaks the Chromebook Pixel touchpad (and touchscreen).

Reported-by: Dirk Hohndel <dirk@hohndel.org>
Bisected-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nick Dyer <nick.dyer@itdev.co.uk>
Cc: Benson Leung <bleung@chromium.org>
Cc: Yufeng Shen <miletus@chromium.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: stable@vger.kernel.org  # v3.16+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2014-12-31 12:59:34 -08:00
parent a5cb2366fb
commit 7f4054836d
1 changed files with 26 additions and 73 deletions
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99
drivers/input/touchscreen/atmel_mxt_ts.c
View file

@ -99,13 +99,9 @@
#define MXT_T6_STATUS_COMSERR (1 << 2)
/* MXT_GEN_POWER_T7 field */
struct t7_config {
u8 idle;
u8 active;
} __packed;
#define MXT_POWER_CFG_RUN 0
#define MXT_POWER_CFG_DEEPSLEEP 1
#define MXT_POWER_IDLEACQINT 0
#define MXT_POWER_ACTVACQINT 1
#define MXT_POWER_ACTV2IDLETO 2
/* MXT_GEN_ACQUIRE_T8 field */
#define MXT_ACQUIRE_CHRGTIME 0
@ -117,6 +113,7 @@ struct t7_config {
#define MXT_ACQUIRE_ATCHCALSTHR 7
/* MXT_TOUCH_MULTI_T9 field */
#define MXT_TOUCH_CTRL 0
#define MXT_T9_ORIENT 9
#define MXT_T9_RANGE 18
@ -256,7 +253,6 @@ struct mxt_data {
bool update_input;
u8 last_message_count;
u8 num_touchids;
struct t7_config t7_cfg;
/* Cached parameters from object table */
u16 T5_address;
@ -672,6 +668,20 @@ static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
data->t6_status = status;
}
static int mxt_write_object(struct mxt_data *data,
u8 type, u8 offset, u8 val)
{
struct mxt_object *object;
u16 reg;
object = mxt_get_object(data, type);
if (!object || offset >= mxt_obj_size(object))
return -EINVAL;
reg = object->start_address;
return mxt_write_reg(data->client, reg + offset, val);
}
static void mxt_input_button(struct mxt_data *data, u8 *message)
{
struct input_dev *input = data->input_dev;
@ -1742,60 +1752,6 @@ static int mxt_initialize(struct mxt_data *data)
return error;
}
static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
{
struct device *dev = &data->client->dev;
int error;
struct t7_config *new_config;
struct t7_config deepsleep = { .active = 0, .idle = 0 };
if (sleep == MXT_POWER_CFG_DEEPSLEEP)
new_config = &deepsleep;
else
new_config = &data->t7_cfg;
error = __mxt_write_reg(data->client, data->T7_address,
sizeof(data->t7_cfg), new_config);
if (error)
return error;
dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
new_config->active, new_config->idle);
return 0;
}
static int mxt_init_t7_power_cfg(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
int error;
bool retry = false;
recheck:
error = __mxt_read_reg(data->client, data->T7_address,
sizeof(data->t7_cfg), &data->t7_cfg);
if (error)
return error;
if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
if (!retry) {
dev_dbg(dev, "T7 cfg zero, resetting\n");
mxt_soft_reset(data);
retry = true;
goto recheck;
} else {
dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
data->t7_cfg.active = 20;
data->t7_cfg.idle = 100;
return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
}
}
dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n",
data->t7_cfg.active, data->t7_cfg.idle);
return 0;
}
static int mxt_configure_objects(struct mxt_data *data,
const struct firmware *cfg)
{
@ -1809,12 +1765,6 @@ static int mxt_configure_objects(struct mxt_data *data,
dev_warn(dev, "Error %d updating config\n", error);
}
error = mxt_init_t7_power_cfg(data);
if (error) {
dev_err(dev, "Failed to initialize power cfg\n");
return error;
}
error = mxt_initialize_t9_input_device(data);
if (error)
return error;
@ -2093,15 +2043,16 @@ static const struct attribute_group mxt_attr_group = {
static void mxt_start(struct mxt_data *data)
{
mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
/* Recalibrate since chip has been in deep sleep */
mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
/* Touch enable */
mxt_write_object(data,
MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
}
static void mxt_stop(struct mxt_data *data)
{
mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
/* Touch disable */
mxt_write_object(data,
MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
}
static int mxt_input_open(struct input_dev *dev)
@ -2266,6 +2217,8 @@ static int __maybe_unused mxt_resume(struct device *dev)
struct mxt_data *data = i2c_get_clientdata(client);
struct input_dev *input_dev = data->input_dev;
mxt_soft_reset(data);
mutex_lock(&input_dev->mutex);
if (input_dev->users)