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usb: chipidea: pull down dp for possible charger detection operation 

The bootloader may use device mode, and keep dp up. We need dp
to be pulled down before possbile charger detection operation.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
This commit is contained in:
Peter Chen 2020-02-10 18:46:27 +08:00
parent 746f316b75
commit 5523f06a19
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GPG Key ID: 4859298150D671BB
1 changed files with 4 additions and 1 deletions
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5
drivers/usb/chipidea/core.c
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@ -1123,8 +1123,11 @@ static int ci_hdrc_probe(struct platform_device *pdev)
if (!ci_otg_is_fsm_mode(ci)) {
/* only update vbus status for peripheral */
if (ci->role == CI_ROLE_GADGET)
if (ci->role == CI_ROLE_GADGET) {
/* Pull down DP for possible charger detection */
hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
ci_handle_vbus_change(ci);
}
ret = ci_role_start(ci, ci->role);
if (ret) {