int twl6040_power(struct twl6040 *twl6040, int on)
{
int ret = 0;
mutex_lock(&twl6040->mutex);
if (on) {
/* already powered-up */
if (twl6040->power_count++)
goto out;
if (gpio_is_valid(twl6040->audpwron)) {
/* use automatic power-up sequence */
ret = twl6040_power_up_automatic(twl6040);
if (ret) {
twl6040->power_count = 0;
goto out;
}
} else {
/* use manual power-up sequence */
ret = twl6040_power_up_manual(twl6040);
if (ret) {
twl6040->power_count = 0;
goto out;
}
}
/* Default PLL configuration after power up */
twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
twl6040->sysclk = 19200000;
twl6040->mclk = 32768;
} else {
/* already powered-down */
if (!twl6040->power_count) {
dev_err(twl6040->dev,
"device is already powered-off\n");
ret = -EPERM;
goto out;
}
if (--twl6040->power_count)
goto out;
if (gpio_is_valid(twl6040->audpwron)) {
/* use AUDPWRON line */
gpio_set_value(twl6040->audpwron, 0);
/* power-down sequence latency */
usleep_range(500, 700);
} else {
/* use manual power-down sequence */
twl6040_power_down_manual(twl6040);
}
twl6040->sysclk = 0;
twl6040->mclk = 0;
}
out:
mutex_unlock(&twl6040->mutex);
return ret;
}
int twl6040_power(struct twl6040 *twl6040, int on)
{
int ret = 0;
mutex_lock(&twl6040->mutex);
if (on) {
/* already powered-up */
if (twl6040->power_count++)
goto out;
ret = clk_prepare_enable(twl6040->clk32k);
if (ret) {
twl6040->power_count = 0;
goto out;
}
/* Allow writes to the chip */
regcache_cache_only(twl6040->regmap, false);
if (gpio_is_valid(twl6040->audpwron)) {
/* use automatic power-up sequence */
ret = twl6040_power_up_automatic(twl6040);
if (ret) {
clk_disable_unprepare(twl6040->clk32k);
twl6040->power_count = 0;
goto out;
}
} else {
/* use manual power-up sequence */
ret = twl6040_power_up_manual(twl6040);
if (ret) {
clk_disable_unprepare(twl6040->clk32k);
twl6040->power_count = 0;
goto out;
}
}
/*
* Register access can produce errors after power-up unless we
* wait at least 8ms based on measurements on duovero.
*/
usleep_range(10000, 12000);
/* Sync with the HW */
ret = regcache_sync(twl6040->regmap);
if (ret) {
dev_err(twl6040->dev, "Failed to sync with the HW: %i\n",
ret);
goto out;
}
/* Default PLL configuration after power up */
twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
twl6040->sysclk_rate = 19200000;
} else {
/* already powered-down */
if (!twl6040->power_count) {
dev_err(twl6040->dev,
"device is already powered-off\n");
ret = -EPERM;
goto out;
}
if (--twl6040->power_count)
goto out;
if (gpio_is_valid(twl6040->audpwron)) {
/* use AUDPWRON line */
gpio_set_value(twl6040->audpwron, 0);
/* power-down sequence latency */
usleep_range(500, 700);
} else {
/* use manual power-down sequence */
twl6040_power_down_manual(twl6040);
}
/* Set regmap to cache only and mark it as dirty */
regcache_cache_only(twl6040->regmap, true);
regcache_mark_dirty(twl6040->regmap);
twl6040->sysclk_rate = 0;
if (twl6040->pll == TWL6040_SYSCLK_SEL_HPPLL) {
clk_disable_unprepare(twl6040->mclk);
twl6040->mclk_rate = 0;
}
clk_disable_unprepare(twl6040->clk32k);
}
out:
mutex_unlock(&twl6040->mutex);
return ret;
}
int twl6040_power(struct twl6040 *twl6040, int on)
{
int ret = 0;
mutex_lock(&twl6040->mutex);
if (on) {
/* already powered-up */
if (twl6040->power_count++)
goto out;
clk_prepare_enable(twl6040->clk32k);
/* Allow writes to the chip */
regcache_cache_only(twl6040->regmap, false);
if (gpio_is_valid(twl6040->audpwron)) {
/* use automatic power-up sequence */
ret = twl6040_power_up_automatic(twl6040);
if (ret) {
twl6040->power_count = 0;
goto out;
}
} else {
/* use manual power-up sequence */
ret = twl6040_power_up_manual(twl6040);
if (ret) {
twl6040->power_count = 0;
goto out;
}
}
/* Sync with the HW */
regcache_sync(twl6040->regmap);
/* Default PLL configuration after power up */
twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
twl6040->sysclk = 19200000;
twl6040->mclk = 32768;
} else {
/* already powered-down */
if (!twl6040->power_count) {
dev_err(twl6040->dev,
"device is already powered-off\n");
ret = -EPERM;
goto out;
}
if (--twl6040->power_count)
goto out;
if (gpio_is_valid(twl6040->audpwron)) {
/* use AUDPWRON line */
gpio_set_value(twl6040->audpwron, 0);
/* power-down sequence latency */
usleep_range(500, 700);
} else {
/* use manual power-down sequence */
twl6040_power_down_manual(twl6040);
}
/* Set regmap to cache only and mark it as dirty */
regcache_cache_only(twl6040->regmap, true);
regcache_mark_dirty(twl6040->regmap);
twl6040->sysclk = 0;
twl6040->mclk = 0;
clk_disable_unprepare(twl6040->clk32k);
}
out:
mutex_unlock(&twl6040->mutex);
return ret;
}
