From 66b85e0efeb16cd529d0a690c3c07c92cfb26e24 Mon Sep 17 00:00:00 2001 From: qi duan Date: Thu, 18 Oct 2018 18:21:57 +0800 Subject: [PATCH] USB: host: tuning disconnect threshold on g12a/g12b [2/2] PD#174736 Problem: Some usb device may disconnect when handshake Solution: tuning disconnect threshold when usb host initial now default is 0x24, only three value can tuning, 0x2c,0x34,0x3c we set 0x34 now Verify: Google estelle boards which return from factory no side effect on refernce u200 board Change-Id: I71d974a6bac43452b20bd7f2a6827d3a46fa39fb Signed-off-by: qi duan --- drivers/amlogic/usb/phy/phy-aml-new-usb2-v2.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/amlogic/usb/phy/phy-aml-new-usb2-v2.c b/drivers/amlogic/usb/phy/phy-aml-new-usb2-v2.c index 6cc8d0140a0f..46a42249dd14 100644 --- a/drivers/amlogic/usb/phy/phy-aml-new-usb2-v2.c +++ b/drivers/amlogic/usb/phy/phy-aml-new-usb2-v2.c @@ -30,6 +30,7 @@ #include "phy-aml-new-usb-v2.h" struct amlogic_usb_v2 *g_phy2_v2; +#define TUNING_DISCONNECT_THRESHOLD 0x34 void set_usb_phy_host_tuning(int port, int default_val) { @@ -97,6 +98,8 @@ void set_usb_pll(struct amlogic_usb_v2 *phy, void __iomem *reg) /* Recovery analog status */ writel(0, reg + 0x38); writel(phy->pll_setting[5], reg + 0x34); + + writel(TUNING_DISCONNECT_THRESHOLD, reg + 0xC); } static int amlogic_new_usb2_init(struct usb_phy *x)