From f9be134357c0200ce48f4cd56b4ec50d3d2e777e Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Thu, 11 Oct 2012 13:55:30 +0200 Subject: [PATCH] mfd: twl6040: Restructure power up and down code Rearrange the code path for power up and down sequence. Signed-off-by: Peter Ujfalusi Signed-off-by: Samuel Ortiz --- drivers/mfd/twl6040-core.c | 38 ++++++++++++++++++-------------------- 1 file changed, 18 insertions(+), 20 deletions(-) diff --git a/drivers/mfd/twl6040-core.c b/drivers/mfd/twl6040-core.c index a46d987b9c8b..6d9db275b0f1 100644 --- 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; -- 2.20.1