mfd: twl6040: Restructure power up and down code

Rearrange the code path for power up and down sequence.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/mfd/twl6040-core.c b/drivers/mfd/twl6040-core.c
index a46d987..6d9db27 100644 (file)
--- a/drivers/mfd/twl6040-core.c
+++ b/drivers/mfd/twl6040-core.c
@@ -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 @@ ncp_err:
        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;