static int arizona_wait_for_boot(struct arizona *arizona)
{
int ret;
/*
* We can't use an interrupt as we need to runtime resume to do so,
* we won't race with the interrupt handler as it'll be blocked on
* runtime resume.
*/
ret = arizona_poll_reg(arizona, 5, ARIZONA_INTERRUPT_RAW_STATUS_5,
ARIZONA_BOOT_DONE_STS, ARIZONA_BOOT_DONE_STS);
if (!ret)
regmap_write(arizona->regmap, ARIZONA_INTERRUPT_STATUS_5,
ARIZONA_BOOT_DONE_STS);
return ret;
}
static int arizona_hardware_patch_wseq(struct arizona* arizona)
{
int ret;
/* Start the write sequencer and wait for it to finish */
ret = regmap_write(arizona->regmap, ARIZONA_WRITE_SEQUENCER_CTRL_0,
ARIZONA_WSEQ_ENA | ARIZONA_WSEQ_START | 160);
if (ret != 0) {
dev_err(arizona->dev, "Failed to start write sequencer: %d\n",
ret);
return ret;
}
ret = arizona_poll_reg(arizona, 5, ARIZONA_WRITE_SEQUENCER_CTRL_1,
ARIZONA_WSEQ_BUSY, 0);
if (ret != 0) {
regmap_write(arizona->regmap, ARIZONA_WRITE_SEQUENCER_CTRL_0,
ARIZONA_WSEQ_ABORT);
ret = -ETIMEDOUT;
}
return ret;
}
static int arizona_apply_hardware_patch(struct arizona* arizona)
{
unsigned int fll, sysclk;
int ret, err;
/* Cache existing FLL and SYSCLK settings */
ret = regmap_read(arizona->regmap, ARIZONA_FLL1_CONTROL_1, &fll);
if (ret != 0) {
dev_err(arizona->dev, "Failed to cache FLL settings: %d\n",
ret);
return ret;
}
ret = regmap_read(arizona->regmap, ARIZONA_SYSTEM_CLOCK_1, &sysclk);
if (ret != 0) {
dev_err(arizona->dev, "Failed to cache SYSCLK settings: %d\n",
ret);
return ret;
}
/* Start up SYSCLK using the FLL in free running mode */
ret = regmap_write(arizona->regmap, ARIZONA_FLL1_CONTROL_1,
ARIZONA_FLL1_ENA | ARIZONA_FLL1_FREERUN);
if (ret != 0) {
dev_err(arizona->dev,
"Failed to start FLL in freerunning mode: %d\n",
ret);
return ret;
}
ret = arizona_poll_reg(arizona, 25, ARIZONA_INTERRUPT_RAW_STATUS_5,
ARIZONA_FLL1_CLOCK_OK_STS,
ARIZONA_FLL1_CLOCK_OK_STS);
if (ret != 0) {
ret = -ETIMEDOUT;
goto err_fll;
}
ret = regmap_write(arizona->regmap, ARIZONA_SYSTEM_CLOCK_1, 0x0144);
if (ret != 0) {
dev_err(arizona->dev, "Failed to start SYSCLK: %d\n", ret);
goto err_fll;
}
/* Start the write sequencer and wait for it to finish */
ret = regmap_write(arizona->regmap, ARIZONA_WRITE_SEQUENCER_CTRL_0,
ARIZONA_WSEQ_ENA | ARIZONA_WSEQ_START | 160);
if (ret != 0) {
dev_err(arizona->dev, "Failed to start write sequencer: %d\n",
ret);
goto err_sysclk;
}
ret = arizona_poll_reg(arizona, 5, ARIZONA_WRITE_SEQUENCER_CTRL_1,
ARIZONA_WSEQ_BUSY, 0);
if (ret != 0) {
regmap_write(arizona->regmap, ARIZONA_WRITE_SEQUENCER_CTRL_0,
ARIZONA_WSEQ_ABORT);
ret = -ETIMEDOUT;
}
err_sysclk:
err = regmap_write(arizona->regmap, ARIZONA_SYSTEM_CLOCK_1, sysclk);
if (err != 0) {
dev_err(arizona->dev,
"Failed to re-apply old SYSCLK settings: %d\n",
err);
}
err_fll:
err = regmap_write(arizona->regmap, ARIZONA_FLL1_CONTROL_1, fll);
if (err != 0) {
dev_err(arizona->dev,
"Failed to re-apply old FLL settings: %d\n",
err);
}
if (ret != 0)
return ret;
else
return err;
}
static int arizona_exec_with_sysclk(struct arizona* arizona,
int (*exec)(struct arizona*))
{
unsigned int fll, sysclk;
int ret, err;
/* Cache existing FLL and SYSCLK settings */
ret = regmap_read(arizona->regmap, ARIZONA_FLL1_CONTROL_1, &fll);
if (ret != 0) {
dev_err(arizona->dev, "Failed to cache FLL settings: %d\n",
ret);
return ret;
}
ret = regmap_read(arizona->regmap, ARIZONA_SYSTEM_CLOCK_1, &sysclk);
if (ret != 0) {
dev_err(arizona->dev, "Failed to cache SYSCLK settings: %d\n",
ret);
return ret;
}
/* Start up SYSCLK using the FLL in free running mode */
ret = regmap_write(arizona->regmap, ARIZONA_FLL1_CONTROL_1,
ARIZONA_FLL1_ENA | ARIZONA_FLL1_FREERUN);
if (ret != 0) {
dev_err(arizona->dev,
"Failed to start FLL in freerunning mode: %d\n",
ret);
return ret;
}
ret = arizona_poll_reg(arizona, 25, ARIZONA_INTERRUPT_RAW_STATUS_5,
ARIZONA_FLL1_CLOCK_OK_STS,
ARIZONA_FLL1_CLOCK_OK_STS);
if (ret != 0) {
ret = -ETIMEDOUT;
goto err_fll;
}
ret = regmap_write(arizona->regmap, ARIZONA_SYSTEM_CLOCK_1, 0x0144);
if (ret != 0) {
dev_err(arizona->dev, "Failed to start SYSCLK: %d\n", ret);
goto err_fll;
}
ret = exec(arizona);
err = regmap_write(arizona->regmap, ARIZONA_SYSTEM_CLOCK_1, sysclk);
if (err != 0) {
dev_err(arizona->dev,
"Failed to re-apply old SYSCLK settings: %d\n",
err);
}
err_fll:
err = regmap_write(arizona->regmap, ARIZONA_FLL1_CONTROL_1, fll);
if (err != 0) {
dev_err(arizona->dev,
"Failed to re-apply old FLL settings: %d\n",
err);
}
if (ret != 0)
return ret;
else
return err;
}