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Subject[PATCH AUTOSEL 5.2 16/23] usb: chipidea: imx: add imx7ulp support
Date
From: Peter Chen <peter.chen@nxp.com>

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>
---
drivers/usb/chipidea/ci_hdrc_imx.c | 28 +++++++++++++++++++++++++++-
drivers/usb/chipidea/usbmisc_imx.c | 4 ++++
include/linux/usb/chipidea.h | 1 +
3 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index ceec8d5985d46..a76708501236d 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 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
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 d8b67e150b129..b7a5727d0c8a8 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 911e05af671ea..edd89b7c8f184 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
--
2.20.1
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