From 40ed51a4b8588055ccd8e5420c76290659c4c974 Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Wed, 14 Aug 2013 12:44:04 +0300 Subject: [PATCH] usb: chipidea: host: add vbus regulator control 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 Signed-off-by: Peter Chen Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman --- drivers/usb/chipidea/host.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c index 9b3aaf132bc3..8cf8d28c88d6 100644 --- a/drivers/usb/chipidea/host.c +++ b/drivers/usb/chipidea/host.c @@ -24,6 +24,7 @@ #include #include #include +#include #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) -- 2.20.1