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Commit b578d2e8 authored by Vijayavardhan Vennapusa's avatar Vijayavardhan Vennapusa
Browse files

USB: dwc3-msm: Add support for new ioctl for voltage request 



Add support for new ioctls for userspace to let kernel driver
know about new voltage request being negogiated and also result
whether the request is successful or not, when HVDCP charger is
connected.

Change-Id: I9f36949fc7888274171aa1724da45a11704b7fec
Signed-off-by: default avatarVijayavardhan Vennapusa <vvreddy@codeaurora.org>
parent 31c52fd3

drivers/usb/dwc3/dwc3-msm.c

+24 −0
Original line number Diff line number Diff line
@@ -2043,6 +2043,30 @@ dwc3_msm_ext_chg_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
			pm_runtime_put(mdwc->dev);

		}

		break;

	case MSM_USB_EXT_CHG_VOLTAGE_INFO:

		if (get_user(val, (int __user *)arg)) {

			pr_err("%s: get_user failed\n\n", __func__);

			ret = -EFAULT;

			break;

		}



		if (val == USB_REQUEST_5V)

			pr_debug("%s:voting 5V voltage request\n", __func__);

		else if (val == USB_REQUEST_9V)

			pr_debug("%s:voting 9V voltage request\n", __func__);

		break;

	case MSM_USB_EXT_CHG_RESULT:

		if (get_user(val, (int __user *)arg)) {

			pr_err("%s: get_user failed\n\n", __func__);

			ret = -EFAULT;

			break;

		}



		if (!val)

			pr_debug("%s:voltage request successful\n", __func__);

		else

			pr_debug("%s:voltage request failed\n", __func__);

		break;

	default:

		ret = -EINVAL;

	}

include/uapi/linux/usb/msm_ext_chg.h

+7 −0
Original line number Diff line number Diff line
@@ -6,6 +6,8 @@ 
#define USB_CHG_BLOCK_ULPI	1

#define USB_CHG_BLOCK_QSCRATCH	2



#define USB_REQUEST_5V		1

#define USB_REQUEST_9V		2

/**

 * struct msm_usb_chg_info - MSM USB charger block details.

 * @chg_block_type: The type of charger block. QSCRATCH/ULPI.
@@ -28,4 +30,9 @@ struct msm_usb_chg_info { 
/* Vote against USB hardware low power mode */

#define MSM_USB_EXT_CHG_BLOCK_LPM _IOW('M', 1, int)



/* To tell kernel about voltage being voted */

#define MSM_USB_EXT_CHG_VOLTAGE_INFO _IOW('M', 2, int)



/* To tell kernel about voltage request result */

#define MSM_USB_EXT_CHG_RESULT _IOW('M', 3, int)

#endif /* __UAPI_USB_MSM_EXT_CHG_H */