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Commit 85503c70 authored by Tanya Finkel's avatar Tanya Finkel
Browse files

usb: msm: Add support for the HUB reset for the synopsys core 



DB8096 have a HUB on the USB port 1. HUB reset is controlled by GPIO.

Change-Id: I44fe4a91a0f0f7a89ef3b7654051fa7f12075fc1
Signed-off-by: default avatarTanya Finkel <tfinkel@codeaurora.org>
parent 3a88ff89

Documentation/devicetree/bindings/usb/msm-ssusb.txt

+1 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ Optional properties : 
  after USB is kept into LPM.

- qcom,vbus-present: Indicates that there is no VBUS indication from PMIC. Assume VBUS is

  present if this property is defined.

- qcom,ext-hub-reset-gpio: This corresponds to gpio which is used for HUB reset.

Sub nodes:

- Sub node for "DWC3- USB3 controller".

  This sub node is required property for device node. The properties of this subnode

drivers/usb/dwc3/dwc3-msm.c

+18 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include <linux/delay.h>

#include <linux/of.h>

#include <linux/of_platform.h>

#include <linux/of_gpio.h>

#include <linux/list.h>

#include <linux/uaccess.h>

#include <linux/usb/ch9.h>
@@ -2024,6 +2025,7 @@ static int dwc3_msm_probe(struct platform_device *pdev) 
	u32 tmp;

	bool host_mode;

	int ret = 0;

	int ext_hub_reset_gpio;



	mdwc = devm_kzalloc(&pdev->dev, sizeof(*mdwc), GFP_KERNEL);

	if (!mdwc) {
@@ -2292,6 +2294,22 @@ static int dwc3_msm_probe(struct platform_device *pdev) 
		}

	}



	ext_hub_reset_gpio = of_get_named_gpio(node,

					"qcom,ext-hub-reset-gpio", 0);



	if (gpio_is_valid(ext_hub_reset_gpio)

		&& (!devm_gpio_request(&pdev->dev, ext_hub_reset_gpio,

			"qcom,ext-hub-reset-gpio"))) {

		/* reset external hub */

		gpio_direction_output(ext_hub_reset_gpio, 1);

		/*

		 * Hub reset should be asserted for minimum 5microsec

		 * before deasserting.

		 */

		usleep_range(5, 1000);

		gpio_direction_output(ext_hub_reset_gpio, 0);

	}



	if (of_property_read_u32(node, "qcom,dwc-usb3-msm-tx-fifo-size",

				 &mdwc->tx_fifo_size))

		dev_err(&pdev->dev,