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input: atmel_mxt_ts: Don't set mode on unsettable regulators

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Currently during boot, and every suspend/resume, we call
regulator_set_optimum_mode on every touchsdcreen regulator. However,
some regulators don't support this function, and this will cause
set_optimum_mode to print an error when this occures.  Correct this by
checking if it is valid to call set_optimum_mode on a given regulator
before doing so.

Change-Id: I8dbd9d8281cb144b31c59d86fcf4e8a8133cd6a7
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>
This commit is contained in:
Amy Maloche
2012-01-24 10:33:47 -08:00
parent a489560278
commit c331f8422a
1 changed files with 29 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/input/touchscreen/atmel_mxt_ts.c
View File

@@ -1364,6 +1364,12 @@ static void mxt_input_close(struct input_dev *dev)
}
static int reg_set_optimum_mode_check(struct regulator *reg, int load_uA)
{
return (regulator_count_voltages(reg) > 0) ?
regulator_set_optimum_mode(reg, load_uA) : 0;
}
static int mxt_power_on(struct mxt_data *data, bool on)
{
int rc;
@@ -1371,7 +1377,7 @@ static int mxt_power_on(struct mxt_data *data, bool on)
if (on == false)
goto power_off;
rc = regulator_set_optimum_mode(data->vcc_ana, MXT_ACTIVE_LOAD_UA);
rc = reg_set_optimum_mode_check(data->vcc_ana, MXT_ACTIVE_LOAD_UA);
if (rc < 0) {
dev_err(&data->client->dev,
"Regulator vcc_ana set_opt failed rc=%d\n", rc);
@@ -1386,8 +1392,8 @@ static int mxt_power_on(struct mxt_data *data, bool on)
}
if (data->pdata->digital_pwr_regulator) {
rc = regulator_set_optimum_mode(data->vcc_dig,
MXT_ACTIVE_LOAD_DIG_UA);
rc = reg_set_optimum_mode_check(data->vcc_dig,
MXT_ACTIVE_LOAD_DIG_UA);
if (rc < 0) {
dev_err(&data->client->dev,
"Regulator vcc_dig set_opt failed rc=%d\n",
@@ -1404,7 +1410,7 @@ static int mxt_power_on(struct mxt_data *data, bool on)
}
if (data->pdata->i2c_pull_up) {
rc = regulator_set_optimum_mode(data->vcc_i2c, MXT_I2C_LOAD_UA);
rc = reg_set_optimum_mode_check(data->vcc_i2c, MXT_I2C_LOAD_UA);
if (rc < 0) {
dev_err(&data->client->dev,
"Regulator vcc_i2c set_opt failed rc=%d\n", rc);
@@ -1425,28 +1431,28 @@ static int mxt_power_on(struct mxt_data *data, bool on)
error_reg_en_vcc_i2c:
if (data->pdata->i2c_pull_up)
regulator_set_optimum_mode(data->vcc_i2c, 0);
reg_set_optimum_mode_check(data->vcc_i2c, 0);
error_reg_opt_i2c:
if (data->pdata->digital_pwr_regulator)
regulator_disable(data->vcc_dig);
error_reg_en_vcc_dig:
if (data->pdata->digital_pwr_regulator)
regulator_set_optimum_mode(data->vcc_dig, 0);
reg_set_optimum_mode_check(data->vcc_dig, 0);
error_reg_opt_vcc_dig:
regulator_disable(data->vcc_ana);
error_reg_en_vcc_ana:
regulator_set_optimum_mode(data->vcc_ana, 0);
reg_set_optimum_mode_check(data->vcc_ana, 0);
return rc;
power_off:
regulator_set_optimum_mode(data->vcc_ana, 0);
reg_set_optimum_mode_check(data->vcc_ana, 0);
regulator_disable(data->vcc_ana);
if (data->pdata->digital_pwr_regulator) {
regulator_set_optimum_mode(data->vcc_dig, 0);
reg_set_optimum_mode_check(data->vcc_dig, 0);
regulator_disable(data->vcc_dig);
}
if (data->pdata->i2c_pull_up) {
regulator_set_optimum_mode(data->vcc_i2c, 0);
reg_set_optimum_mode_check(data->vcc_i2c, 0);
regulator_disable(data->vcc_i2c);
}
msleep(50);
@@ -1562,7 +1568,7 @@ static int mxt_regulator_lpm(struct mxt_data *data, bool on)
if (on == false)
goto regulator_hpm;
rc = regulator_set_optimum_mode(data->vcc_ana, MXT_LPM_LOAD_UA);
rc = reg_set_optimum_mode_check(data->vcc_ana, MXT_LPM_LOAD_UA);
if (rc < 0) {
dev_err(&data->client->dev,
"Regulator vcc_ana set_opt failed rc=%d\n", rc);
@@ -1570,7 +1576,7 @@ static int mxt_regulator_lpm(struct mxt_data *data, bool on)
}
if (data->pdata->digital_pwr_regulator) {
rc = regulator_set_optimum_mode(data->vcc_dig,
rc = reg_set_optimum_mode_check(data->vcc_dig,
MXT_LPM_LOAD_DIG_UA);
if (rc < 0) {
dev_err(&data->client->dev,
@@ -1580,7 +1586,7 @@ static int mxt_regulator_lpm(struct mxt_data *data, bool on)
}
if (data->pdata->i2c_pull_up) {
rc = regulator_set_optimum_mode(data->vcc_i2c,
rc = reg_set_optimum_mode_check(data->vcc_i2c,
MXT_I2C_LPM_LOAD_UA);
if (rc < 0) {
dev_err(&data->client->dev,
@@ -1593,7 +1599,7 @@ static int mxt_regulator_lpm(struct mxt_data *data, bool on)
regulator_hpm:
rc = regulator_set_optimum_mode(data->vcc_ana, MXT_ACTIVE_LOAD_UA);
rc = reg_set_optimum_mode_check(data->vcc_ana, MXT_ACTIVE_LOAD_UA);
if (rc < 0) {
dev_err(&data->client->dev,
"Regulator vcc_ana set_opt failed rc=%d\n", rc);
@@ -1601,7 +1607,7 @@ regulator_hpm:
}
if (data->pdata->digital_pwr_regulator) {
rc = regulator_set_optimum_mode(data->vcc_dig,
rc = reg_set_optimum_mode_check(data->vcc_dig,
MXT_ACTIVE_LOAD_DIG_UA);
if (rc < 0) {
dev_err(&data->client->dev,
@@ -1611,7 +1617,7 @@ regulator_hpm:
}
if (data->pdata->i2c_pull_up) {
rc = regulator_set_optimum_mode(data->vcc_i2c, MXT_I2C_LOAD_UA);
rc = reg_set_optimum_mode_check(data->vcc_i2c, MXT_I2C_LOAD_UA);
if (rc < 0) {
dev_err(&data->client->dev,
"Regulator vcc_i2c set_opt failed rc=%d\n", rc);
@@ -1622,21 +1628,21 @@ regulator_hpm:
return 0;
fail_regulator_lpm:
regulator_set_optimum_mode(data->vcc_ana, MXT_ACTIVE_LOAD_UA);
reg_set_optimum_mode_check(data->vcc_ana, MXT_ACTIVE_LOAD_UA);
if (data->pdata->digital_pwr_regulator)
regulator_set_optimum_mode(data->vcc_dig,
MXT_ACTIVE_LOAD_DIG_UA);
reg_set_optimum_mode_check(data->vcc_dig,
MXT_ACTIVE_LOAD_DIG_UA);
if (data->pdata->i2c_pull_up)
regulator_set_optimum_mode(data->vcc_i2c, MXT_I2C_LOAD_UA);
reg_set_optimum_mode_check(data->vcc_i2c, MXT_I2C_LOAD_UA);
return rc;
fail_regulator_hpm:
regulator_set_optimum_mode(data->vcc_ana, MXT_LPM_LOAD_UA);
reg_set_optimum_mode_check(data->vcc_ana, MXT_LPM_LOAD_UA);
if (data->pdata->digital_pwr_regulator)
regulator_set_optimum_mode(data->vcc_dig, MXT_LPM_LOAD_DIG_UA);
reg_set_optimum_mode_check(data->vcc_dig, MXT_LPM_LOAD_DIG_UA);
if (data->pdata->i2c_pull_up)
regulator_set_optimum_mode(data->vcc_i2c, MXT_I2C_LPM_LOAD_UA);
reg_set_optimum_mode_check(data->vcc_i2c, MXT_I2C_LPM_LOAD_UA);
return rc;
}