41 lines
1.4 KiB
Diff
41 lines
1.4 KiB
Diff
From 4422c4efeed2a8b9fa745c6e529623d89c0be75e Mon Sep 17 00:00:00 2001
|
|
From: Chunfeng Yun <chunfeng.yun@mediatek.com>
|
|
Date: Fri, 13 Oct 2017 16:26:35 +0800
|
|
Subject: [PATCH 128/224] usb: xhci-mtk: check clock stability of U3_MAC
|
|
|
|
This is useful to find out the root cause when the Super Speed doesn't
|
|
work. Such as when the T-PHY is switched to PCIe or SATA, and affects
|
|
Super Speed function, the check will fail.
|
|
|
|
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
|
|
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
|
|
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
---
|
|
drivers/usb/host/xhci-mtk.c | 4 ++++
|
|
1 file changed, 4 insertions(+)
|
|
|
|
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
|
|
index 9502ca408f01..7a92bb782e5c 100644
|
|
--- a/drivers/usb/host/xhci-mtk.c
|
|
+++ b/drivers/usb/host/xhci-mtk.c
|
|
@@ -43,6 +43,7 @@
|
|
|
|
/* ip_pw_sts1 register */
|
|
#define STS1_IP_SLEEP_STS BIT(30)
|
|
+#define STS1_U3_MAC_RST BIT(16)
|
|
#define STS1_XHCI_RST BIT(11)
|
|
#define STS1_SYS125_RST BIT(10)
|
|
#define STS1_REF_RST BIT(8)
|
|
@@ -125,6 +126,9 @@ static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk)
|
|
check_val = STS1_SYSPLL_STABLE | STS1_REF_RST |
|
|
STS1_SYS125_RST | STS1_XHCI_RST;
|
|
|
|
+ if (mtk->num_u3_ports)
|
|
+ check_val |= STS1_U3_MAC_RST;
|
|
+
|
|
ret = readl_poll_timeout(&ippc->ip_pw_sts1, value,
|
|
(check_val == (value & check_val)), 100, 20000);
|
|
if (ret) {
|
|
--
|
|
2.11.0
|
|
|