Add suspend/resume API for system suspend/resume procedure.
Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
---
drivers/usb/chipidea/ci_hdrc_imx.c | 72 +++++++++++++++++++++++++++++++++++-
1 files changed, 71 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index 7764b31..66de2ca 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -1,5 +1,5 @@
/*
- * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright 2012-2013 Freescale Semiconductor, Inc.
* Copyright (C) 2012 Marek Vasut <marex@xxxxxxx>
* on behalf of DENX Software Engineering GmbH
*
@@ -186,6 +186,75 @@ static int ci_hdrc_imx_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int imx_controller_suspend(struct device *dev)
+{
+ struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "at the beginning of %s\n", __func__);
+
+ ci_hdrc_enter_lpm(data->ci_pdev, true);
+
+ if (data->phy)
+ usb_phy_set_suspend(data->phy, 1);
+
+ clk_disable_unprepare(data->clk);
+
+ dev_dbg(dev, "at the end of %s\n", __func__);
+
+ return 0;
+
+}
+static int imx_controller_resume(struct device *dev)
+{
+ struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
+ int ret;
+
+ dev_dbg(dev, "at the beginning of %s\n", __func__);
+
+ ret = clk_prepare_enable(data->clk);
+ if (ret) {
+ dev_err(dev,
+ "Failed to prepare or enable clock, err=%d\n", ret);
+ return ret;
+ }
+
+ ci_hdrc_enter_lpm(data->ci_pdev, false);
+
+ if (data->phy) {
+ /*
+ * USB PHY needs to wait 6 times of 32K cycles
+ * for clock stable.
+ */
+ udelay(500);
+ usb_phy_set_suspend(data->phy, 0);
+ }
+
+ dev_dbg(dev, "at the end of %s\n", __func__);
+
+ return ret;
+}
+
+static int ci_hdrc_imx_suspend(struct device *dev)
+{
+ dev_dbg(dev, "at %s\n", __func__);
+
+ return imx_controller_suspend(dev);
+}
+
+static int ci_hdrc_imx_resume(struct device *dev)
+{
+ dev_dbg(dev, "at %s\n", __func__);
+
+ return imx_controller_resume(dev);
+}
+
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
+};
+
static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
{ .compatible = "fsl,imx27-usb", },
{ /* sentinel */ }
@@ -199,6 +268,7 @@ static struct platform_driver ci_hdrc_imx_driver = {
.name = "imx_usb",
.owner = THIS_MODULE,
.of_match_table = ci_hdrc_imx_dt_ids,
+ .pm = &ci_hdrc_imx_pm_ops,
},
};
--
1.7.1
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