From b7d2d5be3c910fddd19cafa0861016712c665168 Mon Sep 17 00:00:00 2001 From: George Cherian Date: Fri, 11 Oct 2013 00:18:39 +0530 Subject: extcon: palmas: Handle ID interrupt properly using USB_ID_INT_SRC Always cross check with the ID state and the source of interrupt. Also add a case in which ID Source is ID_GND but LATCH state is set wrongly. This uses the previous Link stat to determine the new state. Signed-off-by: George Cherian Acked-by: Laxman Dewangan Signed-off-by: Chanwoo Choi --- drivers/extcon/extcon-palmas.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) (limited to 'drivers/extcon') diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c index 6e83e9a43d1..2aea4bcdd7f 100644 --- a/drivers/extcon/extcon-palmas.c +++ b/drivers/extcon/extcon-palmas.c @@ -78,20 +78,24 @@ static irqreturn_t palmas_vbus_irq_handler(int irq, void *_palmas_usb) static irqreturn_t palmas_id_irq_handler(int irq, void *_palmas_usb) { - unsigned int set; + unsigned int set, id_src; struct palmas_usb *palmas_usb = _palmas_usb; palmas_read(palmas_usb->palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_ID_INT_LATCH_SET, &set); + palmas_read(palmas_usb->palmas, PALMAS_USB_OTG_BASE, + PALMAS_USB_ID_INT_SRC, &id_src); - if (set & PALMAS_USB_ID_INT_SRC_ID_GND) { + if ((set & PALMAS_USB_ID_INT_SRC_ID_GND) && + (id_src & PALMAS_USB_ID_INT_SRC_ID_GND)) { palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_ID_INT_LATCH_CLR, PALMAS_USB_ID_INT_EN_HI_CLR_ID_GND); palmas_usb->linkstat = PALMAS_USB_STATE_ID; extcon_set_cable_state(&palmas_usb->edev, "USB-HOST", true); dev_info(palmas_usb->dev, "USB-HOST cable is attached\n"); - } else if (set & PALMAS_USB_ID_INT_SRC_ID_FLOAT) { + } else if ((set & PALMAS_USB_ID_INT_SRC_ID_FLOAT) && + (id_src & PALMAS_USB_ID_INT_SRC_ID_FLOAT)) { palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_ID_INT_LATCH_CLR, PALMAS_USB_ID_INT_EN_HI_CLR_ID_FLOAT); @@ -103,6 +107,11 @@ static irqreturn_t palmas_id_irq_handler(int irq, void *_palmas_usb) palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT; extcon_set_cable_state(&palmas_usb->edev, "USB-HOST", false); dev_info(palmas_usb->dev, "USB-HOST cable is detached\n"); + } else if ((palmas_usb->linkstat == PALMAS_USB_STATE_DISCONNECT) && + (id_src & PALMAS_USB_ID_INT_SRC_ID_GND)) { + palmas_usb->linkstat = PALMAS_USB_STATE_ID; + extcon_set_cable_state(&palmas_usb->edev, "USB-HOST", true); + dev_info(palmas_usb->dev, " USB-HOST cable is attached\n"); } return IRQ_HANDLED; -- cgit v1.2.3