/**
* hsi_clocks_enable_channel - virtual wrapper for enabling HSI clocks for
* a given channel
* @dev - reference to the hsi device.
* @channel_number - channel number which requests clock to be enabled
* 0xFF means no particular channel
*
* Returns: -EEXIST if clocks were already active
* 0 if clocks were previously inactive
*
* Note : there is no real HW clock management per HSI channel, this is only
* virtual to keep track of active channels and ease debug
*
* Function to be called with lock
*/
int hsi_clocks_enable_channel(struct device *dev, u8 channel_number,
const char *s)
{
struct platform_device *pd = to_platform_device(dev);
struct hsi_dev *hsi_ctrl = platform_get_drvdata(pd);
if (channel_number != HSI_CH_NUMBER_NONE)
dev_dbg(dev, "CLK: hsi_clocks_enable for "
"channel %d: %s\n", channel_number, s);
else
dev_dbg(dev, "CLK: hsi_clocks_enable: %s\n", s);
if (hsi_ctrl->clock_enabled) {
dev_dbg(dev, "Clocks already enabled, skipping...\n");
return -EEXIST;
}
#ifdef K3_0_PORTING_HSI_MISSING_FEATURE
/* Prevent Fclk change */
if (dpll_cascading_blocker_hold(dev) < 0)
dev_warn(dev, "Error holding DPLL cascading constraint\n");
#endif
return pm_runtime_get_sync(dev);
}
/**
* hsi_clocks_enable_channel - virtual wrapper for enabling HSI clocks for
* a given channel
* @dev - reference to the hsi device.
* @channel_number - channel number which requests clock to be enabled
* 0xFF means no particular channel
*
* Returns: 1 if clocks were already active
* 0 if clocks were previously inactive
* < 0 if failed to activate clocks
*
* Note : there is no real HW clock management per HSI channel, this is only
* virtual to keep track of active channels and ease debug
*
* Function to be called with lock
*/
int hsi_clocks_enable_channel(struct device *dev, u8 channel_number,
const char *s)
{
struct platform_device *pd = to_platform_device(dev);
struct hsi_platform_data *pdata = dev_get_platdata(dev);
struct hsi_dev *hsi_ctrl = platform_get_drvdata(pd);
int ret;
if (channel_number != HSI_CH_NUMBER_NONE)
dev_dbg(dev, "CLK: hsi_clocks_enable for "
"channel %d: %s\n", channel_number, s);
else
dev_dbg(dev, "CLK: hsi_clocks_enable: %s\n", s);
if (hsi_ctrl->clock_enabled) {
dev_dbg(dev, "Clocks already enabled, skipping...\n");
return 1;
}
#ifdef CONFIG_PM
/* Prevent Fclk change */
if (dpll_cascading_blocker_hold(dev) < 0)
dev_warn(dev, "Error holding DPLL cascading constraint\n");
#endif /* CONFIG_PM */
#ifndef USE_PM_RUNTIME_FOR_HSI
ret = pdata->device_enable(pd);
if (ret < 0) {
dev_err(dev, "Failed to enable device: %s %d\n", s, ret);
return ret;
}
hsi_runtime_resume(dev);
return 0;
#else
return pm_runtime_get_sync(dev);
#endif
}
static int bluetooth_set_power(void *data, enum rfkill_user_states state)
{
int ret = 0;
switch (state) {
case RFKILL_USER_STATE_UNBLOCKED:
pr_info("[BT] Device Powering ON\n");
if (gpio_is_valid(OMAP_GPIO_BT_EN))
gpio_direction_output(OMAP_GPIO_BT_EN, GPIO_LEVEL_HIGH);
if (gpio_is_valid(OMAP_GPIO_BT_nRST))
gpio_direction_output(OMAP_GPIO_BT_nRST, GPIO_LEVEL_HIGH);
pr_debug("[BT] GPIO_BT_nRST = %d\n",
gpio_get_value(OMAP_GPIO_BT_nRST));
pr_debug("[BT] GPIO_BT_EN = %d\n",
gpio_get_value(OMAP_GPIO_BT_EN));
/* BT reset toggle for preventing BT on fail... */
if (gpio_is_valid(OMAP_GPIO_BT_nRST))
gpio_direction_output(OMAP_GPIO_BT_nRST, GPIO_LEVEL_LOW);
msleep(20);
if (gpio_is_valid(OMAP_GPIO_BT_nRST))
gpio_direction_output(OMAP_GPIO_BT_nRST, GPIO_LEVEL_HIGH);
ret = enable_irq_wake(irq);
if (ret < 0)
pr_err("[BT] set wakeup src failed\n");
enable_irq(irq);
dpll_cascading_blocker_hold(&bt_dev->dev);
break;
case RFKILL_USER_STATE_SOFT_BLOCKED:
pr_info("[BT] Device Powering OFF\n");
ret = disable_irq_wake(irq);
if (ret < 0)
pr_err("[BT] unset wakeup src failed\n");
disable_irq(irq);
wake_unlock(&rfkill_wake_lock);
gpio_direction_output(OMAP_GPIO_BT_nRST, GPIO_LEVEL_LOW);
pr_debug("[BT] GPIO_BT_nRST = %d\n",
gpio_get_value(OMAP_GPIO_BT_nRST));
gpio_direction_output(OMAP_GPIO_BT_EN, GPIO_LEVEL_LOW);
pr_debug("[BT] GPIO_BT_EN = %d\n",
gpio_get_value(OMAP_GPIO_BT_EN));
dpll_cascading_blocker_release(&bt_dev->dev);
break;
default:
pr_err("[BT] Bad bluetooth rfkill state %d\n", state);
}
return 0;
}
