usb: chipidea: host: add vbus regulator control (40ed51a4) · Commits · 戴 / test

For boards which have board level vbus control (eg, through gpio), we need to vbus operation according to below rules: - For host, we need open vbus before start hcd, and close it after remove hcd. - For otg, the vbus needs to be on/off when usb role switches. When the host roles begins, it opens vbus; when the host role finishes, it closes vbus. We put vbus operation to host as host is the only vbus user, When we are at host mode, the vbus is on, when we are not at host mode, vbus should be off. Tested-by:

Marek Vasut <marex@denx.de> Signed-off-by:

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

Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/host.c

+22 −1

Original line number	Diff line number	Diff line
		@@ -24,6 +24,7 @@
		#include <linux/usb.h>
		#include <linux/usb/hcd.h>
		#include <linux/usb/chipidea.h>
		#include <linux/regulator/consumer.h>

		#include "../host/ehci.h"

		@@ -65,9 +66,19 @@ static int host_start(struct ci_hdrc *ci)
		ehci->has_hostpc = ci->hw_bank.lpm;
		ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;

		if (ci->platdata->reg_vbus) {
		ret = regulator_enable(ci->platdata->reg_vbus);
		if (ret) {
		dev_err(ci->dev,
		"Failed to enable vbus regulator, ret=%d\n",
		ret);
		goto put_hcd;
		}
		}

		ret = usb_add_hcd(hcd, 0, 0);
		if (ret)
		usb_put_hcd(hcd);
		goto disable_reg;
		else
		ci->hcd = hcd;

		@@ -75,6 +86,14 @@ static int host_start(struct ci_hdrc *ci)
		hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);

		return ret;

		disable_reg:
		regulator_disable(ci->platdata->reg_vbus);

		put_hcd:
		usb_put_hcd(hcd);

		return ret;
		}

		static void host_stop(struct ci_hdrc *ci)
		@@ -83,6 +102,8 @@ static void host_stop(struct ci_hdrc *ci)

		usb_remove_hcd(hcd);
		usb_put_hcd(hcd);
		if (ci->platdata->reg_vbus)
		regulator_disable(ci->platdata->reg_vbus);
		}

		int ci_hdrc_host_init(struct ci_hdrc *ci)

Admin message