usb: chipidea: imx: add imx7ulp support

In this commit, we add CI_HDRC_PMQOS to avoid system entering idle,
at imx7ulp, if the system enters idle, the DMA will stop, so the USB
transfer can't work at this case.

Signed-off-by: Peter Chen <peter.chen@nxp.com>

3 files changed, 32 insertions, 1 deletions

diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index ceec8d5985d4..a76708501236 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -13,6 +13,7 @@
 #include <linux/usb/of.h>
 #include <linux/clk.h>
 #include <linux/pinctrl/consumer.h>
+#include <linux/pm_qos.h>
 
 #include "ci.h"
 #include "ci_hdrc_imx.h"
@@ -63,6 +64,11 @@ static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
 };
 
+static const struct ci_hdrc_imx_platform_flag imx7ulp_usb_data = {
+        .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
+                CI_HDRC_PMQOS,
+};
+
 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
         { .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
         { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
@@ -72,6 +78,7 @@ static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
         { .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
         { .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
         { .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
+        { .compatible = "fsl,imx7ulp-usb", .data = &imx7ulp_usb_data},
         { /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
@@ -93,6 +100,8 @@ struct ci_hdrc_imx_data {
         struct clk *clk_ahb;
         struct clk *clk_per;
         /* --------------------------------- */
+        struct pm_qos_request pm_qos_req;
+        const struct ci_hdrc_imx_platform_flag *plat_data;
 };
 
 /* Common functions shared by usbmisc drivers */
@@ -309,6 +318,8 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
         if (!data)
                 return -ENOMEM;
 
+        data->plat_data = imx_platform_flag;
+        pdata.flags |= imx_platform_flag->flags;
         platform_set_drvdata(pdev, data);
         data->usbmisc_data = usbmisc_get_init_data(dev);
         if (IS_ERR(data->usbmisc_data))
@@ -369,6 +380,11 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
                         }
                 }
         }
+
+        if (pdata.flags & CI_HDRC_PMQOS)
+                pm_qos_add_request(&data->pm_qos_req,
+                        PM_QOS_CPU_DMA_LATENCY, 0);
+
         ret = imx_get_clks(dev);
         if (ret)
                 goto disable_hsic_regulator;
@@ -396,7 +412,6 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
                 usb_phy_init(pdata.usb_phy);
         }
 
-        pdata.flags |= imx_platform_flag->flags;
         if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
                 data->supports_runtime_pm = true;
 
@@ -439,6 +454,8 @@ err_clk:
 disable_hsic_regulator:
         if (data->hsic_pad_regulator)
                 ret = regulator_disable(data->hsic_pad_regulator);
+        if (pdata.flags & CI_HDRC_PMQOS)
+                pm_qos_remove_request(&data->pm_qos_req);
         return ret;
 }
 
@@ -455,6 +472,8 @@ static int ci_hdrc_imx_remove(struct platform_device *pdev)
         if (data->override_phy_control)
                 usb_phy_shutdown(data->phy);
         imx_disable_unprepare_clks(&pdev->dev);
+        if (data->plat_data->flags & CI_HDRC_PMQOS)
+                pm_qos_remove_request(&data->pm_qos_req);
         if (data->hsic_pad_regulator)
                 regulator_disable(data->hsic_pad_regulator);
 
@@ -480,6 +499,9 @@ static int __maybe_unused imx_controller_suspend(struct device *dev)
         }
 
         imx_disable_unprepare_clks(dev);
+        if (data->plat_data->flags & CI_HDRC_PMQOS)
+                pm_qos_remove_request(&data->pm_qos_req);
+
         data->in_lpm = true;
 
         return 0;
@@ -497,6 +519,10 @@ static int __maybe_unused imx_controller_resume(struct device *dev)
                 return 0;
         }
 
+        if (data->plat_data->flags & CI_HDRC_PMQOS)
+                pm_qos_add_request(&data->pm_qos_req,
+                        PM_QOS_CPU_DMA_LATENCY, 0);
+
         ret = imx_prepare_enable_clks(dev);
         if (ret)
                 return ret;
diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index d8b67e150b12..b7a5727d0c8a 100644
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -763,6 +763,10 @@ static const struct of_device_id usbmisc_imx_dt_ids[] = {
                 .compatible = "fsl,imx7d-usbmisc",
                 .data = &imx7d_usbmisc_ops,
         },
+        {
+                .compatible = "fsl,imx7ulp-usbmisc",
+                .data = &imx7d_usbmisc_ops,
+        },
         { /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, usbmisc_imx_dt_ids);
diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
index 911e05af671e..edd89b7c8f18 100644
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h
@@ -61,6 +61,7 @@ struct ci_hdrc_platform_data {
 #define CI_HDRC_OVERRIDE_PHY_CONTROL    BIT(12) /* Glue layer manages phy */
 #define CI_HDRC_REQUIRES_ALIGNED_DMA    BIT(13)
 #define CI_HDRC_IMX_IS_HSIC             BIT(14)
+#define CI_HDRC_PMQOS                   BIT(15)
         enum usb_dr_mode        dr_mode;
 #define CI_HDRC_CONTROLLER_RESET_EVENT          0
 #define CI_HDRC_CONTROLLER_STOPPED_EVENT        1