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Commit f9be1343 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Samuel Ortiz
Browse files

mfd: twl6040: Restructure power up and down code 



Rearrange the code path for power up and down sequence.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent eae9a9c8

drivers/mfd/twl6040-core.c

+18 −20
Original line number Diff line number Diff line
@@ -104,7 +104,7 @@ int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask) 
EXPORT_SYMBOL(twl6040_clear_bits);



/* twl6040 codec manual power-up sequence */

static int twl6040_power_up(struct twl6040 *twl6040)

static int twl6040_power_up_manual(struct twl6040 *twl6040)

{

	u8 ldoctl, ncpctl, lppllctl;

	int ret;
@@ -158,11 +158,12 @@ static int twl6040_power_up(struct twl6040 *twl6040) 
	ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);

	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);



	dev_err(twl6040->dev, "manual power-up failed\n");

	return ret;

}



/* twl6040 manual power-down sequence */

static void twl6040_power_down(struct twl6040 *twl6040)

static void twl6040_power_down_manual(struct twl6040 *twl6040)

{

	u8 ncpctl, ldoctl, lppllctl;
@@ -218,18 +219,22 @@ static irqreturn_t twl6040_naudint_handler(int irq, void *data) 
	return IRQ_HANDLED;

}



static int twl6040_power_up_completion(struct twl6040 *twl6040)

static int twl6040_power_up_automatic(struct twl6040 *twl6040)

{

	int time_left;

	u8 intid;



	gpio_set_value(twl6040->audpwron, 1);



	time_left = wait_for_completion_timeout(&twl6040->ready,

						msecs_to_jiffies(144));

	if (!time_left) {

		u8 intid;



		dev_warn(twl6040->dev, "timeout waiting for READYINT\n");

		intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);

		if (!(intid & TWL6040_READYINT)) {

			dev_err(twl6040->dev,

				"timeout waiting for READYINT\n");

			dev_err(twl6040->dev, "automatic power-up failed\n");

			gpio_set_value(twl6040->audpwron, 0);

			return -ETIMEDOUT;

		}

	}
@@ -239,7 +244,6 @@ static int twl6040_power_up_completion(struct twl6040 *twl6040) 


int twl6040_power(struct twl6040 *twl6040, int on)

{

	int audpwron = twl6040->audpwron;

	int ret = 0;



	mutex_lock(&twl6040->mutex);
@@ -249,23 +253,17 @@ int twl6040_power(struct twl6040 *twl6040, int on) 
		if (twl6040->power_count++)

			goto out;



		if (gpio_is_valid(audpwron)) {

			/* use AUDPWRON line */

			gpio_set_value(audpwron, 1);

			/* wait for power-up completion */

			ret = twl6040_power_up_completion(twl6040);

		if (gpio_is_valid(twl6040->audpwron)) {

			/* use automatic power-up sequence */

			ret = twl6040_power_up_automatic(twl6040);

			if (ret) {

				dev_err(twl6040->dev,

					"automatic power-up failed\n");

				twl6040->power_count = 0;

				goto out;

			}

		} else {

			/* use manual power-up sequence */

			ret = twl6040_power_up(twl6040);

			ret = twl6040_power_up_manual(twl6040);

			if (ret) {

				dev_err(twl6040->dev,

					"manual power-up failed\n");

				twl6040->power_count = 0;

				goto out;

			}
@@ -286,15 +284,15 @@ int twl6040_power(struct twl6040 *twl6040, int on) 
		if (--twl6040->power_count)

			goto out;



		if (gpio_is_valid(audpwron)) {

		if (gpio_is_valid(twl6040->audpwron)) {

			/* use AUDPWRON line */

			gpio_set_value(audpwron, 0);

			gpio_set_value(twl6040->audpwron, 0);



			/* power-down sequence latency */

			usleep_range(500, 700);

		} else {

			/* use manual power-down sequence */

			twl6040_power_down(twl6040);

			twl6040_power_down_manual(twl6040);

		}

		twl6040->sysclk = 0;

		twl6040->mclk = 0;