/**
* hsi_runtime_suspend - Prepare HSI for low power : device will not process data and will
not communicate with the CPU
* @dev - reference to the hsi device.
*
* Return value : -EBUSY or -EAGAIN if device is busy and still operational
*
*/
int hsi_runtime_suspend(struct device *dev)
{
struct hsi_platform_data *pdata = dev_get_platdata(dev);
struct platform_device *pd = to_platform_device(dev);
struct hsi_dev *hsi_ctrl = platform_get_drvdata(pd);
int i;
dev_dbg(dev, "%s\n", __func__);
if (!hsi_ctrl->clock_enabled)
dev_warn(dev, "Warning: clock status mismatch vs runtime PM\n");
/* Save context */
hsi_save_ctx(hsi_ctrl);
hsi_ctrl->clock_enabled = false;
/* HSI is going to IDLE, it needs IO wakeup mechanism enabled */
if (device_may_wakeup(dev))
for (i = 0; i < hsi_ctrl->max_p; i++)
pdata->wakeup_enable(hsi_ctrl->hsi_port[i].port_number);
else
for (i = 0; i < hsi_ctrl->max_p; i++)
pdata->wakeup_disable(
hsi_ctrl->hsi_port[i].port_number);
/* HSI is now ready to be put in low power state */
return 0;
}
/**
* hsi_runtime_suspend - Prepare HSI for low power : device will not process data and will
not communicate with the CPU
* @dev - reference to the hsi device.
*
* Return value : -EBUSY or -EAGAIN if device is busy and still operational
*
*/
int hsi_runtime_suspend(struct device *dev)
{
struct platform_device *pd = to_platform_device(dev);
struct hsi_dev *hsi_ctrl = platform_get_drvdata(pd);
struct hsi_platform_data *pdata = hsi_ctrl->dev->platform_data;
int port;
dev_dbg(dev, "%s\n", __func__);
if (!hsi_ctrl->clock_enabled)
dev_warn(dev, "Warning: clock status mismatch vs runtime PM\n");
/* Save context */
hsi_save_ctx(hsi_ctrl);
hsi_ctrl->clock_enabled = false;
/* Put HSR into SLEEP mode to force ACREADY to low while HSI is idle */
for (port = 1; port <= pdata->num_ports; port++) {
hsi_outl_and(HSI_HSR_MODE_MODE_VAL_SLEEP, hsi_ctrl->base,
HSI_HSR_MODE_REG(port));
}
/* HSI is going to INA/RET/OFF, it needs IO wakeup mechanism enabled */
if (device_may_wakeup(dev))
pdata->wakeup_enable(0);
else
pdata->wakeup_disable(0);
/* HSI is now ready to be put in low power state */
return 0;
}
/**
* hsi_runtime_suspend - Prepare HSI for low power : device will not process data and will
not communicate with the CPU
* @dev - reference to the hsi device.
*
* Return value : -EBUSY or -EAGAIN if device is busy and still operational
*
*/
int hsi_runtime_suspend(struct device *dev)
{
struct platform_device *pd = to_platform_device(dev);
struct hsi_dev *hsi_ctrl = platform_get_drvdata(pd);
dev_dbg(dev, "%s\n", __func__);
if (!hsi_ctrl->clock_enabled)
dev_warn(dev, "Warning: clock status mismatch vs runtime PM\n");
/* Save context */
hsi_save_ctx(hsi_ctrl);
hsi_ctrl->clock_enabled = false;
/* HSI is now ready to be put in low power state */
return 0;
}
static void hsi_clk_disable(struct clk *clk)
{
#ifdef OMAP_HSI_EXAMPLE_PWR_CODE
struct hsi_internal_clk *hsi_clk =
container_of(clk, struct hsi_internal_clk, clk);
int i;
if (!hsi_clk->rate_change) {
hsi_save_mode(hsi_clk->pdev);
hsi_set_mode(hsi_clk->pdev, HSI_MODE_SLEEP);
}
/* Save ctx in all ports */
hsi_save_ctx(hsi_clk->pdev);
for (i = 0; i < hsi_clk->n_childs; i++)
omap2_clk_disable(hsi_clk->childs[i]);
#endif
}
