From mboxrd@z Thu Jan 1 00:00:00 1970 From: Li Jun Subject: [PATCH v6 07/23] usb: common: add API to update usb otg capabilities by device tree Date: Mon, 29 Jun 2015 15:47:46 +0800 Message-ID: <1435564082-14583-8-git-send-email-jun.li@freescale.com> References: <1435564082-14583-1-git-send-email-jun.li@freescale.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1435564082-14583-1-git-send-email-jun.li-KZfg59tc24xl57MIdRCFDg@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, balbi-l0cyMroinI0@public.gmane.org, peter.chen-KZfg59tc24xl57MIdRCFDg@public.gmane.org, robh+d-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org Cc: linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, pawel.moll-5wv7dgnIgG8@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, macpaul-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, rogerq-l0cyMroinI0@public.gmane.org, Li Jun List-Id: devicetree@vger.kernel.org Check property of usb hardware to update otg version and disable SRP, HNP and ADP if its disable flag is present. Signed-off-by: Li Jun --- drivers/usb/common/common.c | 47 +++++++++++++++++++++++++++++++++++++++++++++ include/linux/usb/of.h | 7 +++++++ 2 files changed, 54 insertions(+) diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c index b530fd4..10c986b 100644 --- a/drivers/usb/common/common.c +++ b/drivers/usb/common/common.c @@ -154,6 +154,53 @@ bool of_usb_host_tpl_support(struct device_node *np) return false; } EXPORT_SYMBOL_GPL(of_usb_host_tpl_support); + +/** + * of_usb_update_otg_caps - to update usb otg capabilities according to + * the passed properties in DT. + * @np: Pointer to the given device_node + * @otg_caps: Pointer to the target usb_otg_caps to be set + * + * The function updates the otg capabilities + */ +int of_usb_update_otg_caps(struct device_node *np, + struct usb_otg_caps *otg_caps) +{ + u32 otg_rev; + + if (!otg_caps) + return -EINVAL; + + if (!of_property_read_u32(np, "otg-rev", &otg_rev)) { + switch (otg_rev) { + case 0x0100: + case 0x0120: + case 0x0130: + case 0x0200: + case 0x0300: + otg_caps->otg_rev = otg_rev; + break; + default: + pr_err("%s: unsupported otg-rev: 0x%x\n", + np->full_name, otg_rev); + return -EINVAL; + } + } else { + otg_caps->otg_rev = 0; + } + + if (of_find_property(np, "hnp-disable", NULL)) + otg_caps->hnp_support = false; + if (of_find_property(np, "srp-disable", NULL)) + otg_caps->srp_support = false; + if (of_find_property(np, "adp-disable", NULL) || + (otg_caps->otg_rev < 0x0200)) + otg_caps->adp_support = false; + + return 0; +} +EXPORT_SYMBOL_GPL(of_usb_update_otg_caps); + #endif MODULE_LICENSE("GPL"); diff --git a/include/linux/usb/of.h b/include/linux/usb/of.h index cfe0528..8c5a818 100644 --- a/include/linux/usb/of.h +++ b/include/linux/usb/of.h @@ -15,6 +15,8 @@ enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np); enum usb_device_speed of_usb_get_maximum_speed(struct device_node *np); bool of_usb_host_tpl_support(struct device_node *np); +int of_usb_update_otg_caps(struct device_node *np, + struct usb_otg_caps *otg_caps); #else static inline enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np) { @@ -30,6 +32,11 @@ static inline bool of_usb_host_tpl_support(struct device_node *np) { return false; } +static inline int of_usb_update_otg_caps(struct device_node *np, + struct usb_otg_caps *otg_caps) +{ + return 0; +} #endif #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_USB_SUPPORT) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html