Commit 11a441ce authored by Mike Turquette's avatar Mike Turquette Committed by Samuel Ortiz
Browse files

mfd: Introduce remove_script function for twl4030



New function twl4030_remove_script(u8 flags) takes a script type as
defined in twl.h and prevents any script already loaded in that position
from running.  This is accomplished by programming SEQ_ADD_* to 0x3f,
the END_OF_SCRIPT value, where SEQ_ADD_* is determined by flags.

(Future) users of this function include OMAP board files for machines
facing a race condition between sleep and warm reset.
Signed-off-by: default avatarMike Turquette <mturquette@ti.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 3d8ca8c0
......@@ -461,6 +461,56 @@ out:
return err;
}
int twl4030_remove_script(u8 flags)
{
int err = 0;
err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, R_KEY_1,
R_PROTECT_KEY);
if (err) {
pr_err("twl4030: unable to unlock PROTECT_KEY\n");
return err;
}
err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, R_KEY_2,
R_PROTECT_KEY);
if (err) {
pr_err("twl4030: unable to unlock PROTECT_KEY\n");
return err;
}
if (flags & TWL4030_WRST_SCRIPT) {
err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, END_OF_SCRIPT,
R_SEQ_ADD_WARM);
if (err)
return err;
}
if (flags & TWL4030_WAKEUP12_SCRIPT) {
if (err)
err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, END_OF_SCRIPT,
R_SEQ_ADD_S2A12);
return err;
}
if (flags & TWL4030_WAKEUP3_SCRIPT) {
err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, END_OF_SCRIPT,
R_SEQ_ADD_S2A3);
if (err)
return err;
}
if (flags & TWL4030_SLEEP_SCRIPT) {
err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, END_OF_SCRIPT,
R_SEQ_ADD_A2S);
if (err)
return err;
}
err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, R_PROTECT_KEY);
if (err)
pr_err("TWL4030 Unable to relock registers\n");
return err;
}
void __init twl4030_power_init(struct twl4030_power_data *twl4030_scripts)
{
int err = 0;
......
......@@ -550,6 +550,7 @@ struct twl4030_power_data {
};
extern void twl4030_power_init(struct twl4030_power_data *triton2_scripts);
extern int twl4030_remove_script(u8 flags);
struct twl4030_codec_audio_data {
unsigned int audio_mclk;
......
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment