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USB: host: tuning disconnect threshold on g12a/g12b [2/2]

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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 <qi.duan@amlogic.com>
This commit is contained in:
qi duan
2018-10-18 18:21:57 +08:00
committed by Jianxin Pan
parent 259da07f3e
commit 66b85e0efe
1 changed files with 3 additions and 0 deletions
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3
drivers/amlogic/usb/phy/phy-aml-new-usb2-v2.c
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@@ -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)