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Commit c2a0ab6b authored by Sakethram Bommisetti's avatar Sakethram Bommisetti Committed by Felipe Balbi
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usb: phy: ab8500-usb: fix eye diagram for ab8500 v2.0 



AB8500 v2.0 has eye diagram issues when drawing more than 100mA from
VBUS.  Force charging current to 100mA in case of standard host.

Signed-off-by: default avatarSakethram Bommisetti <sakethram.bommisetti@stericsson.com>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarFabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 7124631a

drivers/usb/phy/phy-ab8500-usb.c

+15 −0
Original line number Diff line number Diff line
@@ -485,6 +485,19 @@ static void ab8500_usb_phy_disable_work(struct work_struct *work) 
		ab8500_usb_peri_phy_dis(ab);

}



static unsigned ab8500_eyediagram_workaroud(struct ab8500_usb *ab, unsigned mA)

{

	/*

	 * AB8500 V2 has eye diagram issues when drawing more than 100mA from

	 * VBUS.  Set charging current to 100mA in case of standard host

	 */

	if (is_ab8500_2p0_or_earlier(ab->ab8500))

		if (mA > 100)

			mA = 100;



	return mA;

}



static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA)

{

	struct ab8500_usb *ab;
@@ -494,6 +507,8 @@ static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA) 


	ab = phy_to_ab(phy);



	mA = ab8500_eyediagram_workaroud(ab, mA);



	ab->vbus_draw = mA;



	if (mA)