diff options
| author | Chunfeng Yun | 2019-03-21 03:53:48 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2019-03-26 08:40:14 +0100 |
| commit | 83374e035b6286731c5aa617844c7b724294c2a7 (patch) | |
| tree | 212fe872a4028092f183a1777089f6eee84fff3a /drivers/usb/mtu3/mtu3_core.c | |
| parent | usb: mtu3: move vbus and mode debugfs interfaces into mtu3_debugfs.c (diff) | |
| download | kernel-qcow2-linux-83374e035b6286731c5aa617844c7b724294c2a7.tar.gz kernel-qcow2-linux-83374e035b6286731c5aa617844c7b724294c2a7.tar.xz kernel-qcow2-linux-83374e035b6286731c5aa617844c7b724294c2a7.zip | |
usb: mtu3: add tracepoints to help debug
This patch implements a few initial tracepoints for the
mtu3 driver. More traces can be added as necessary in order
to ease the task of debugging.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/mtu3/mtu3_core.c')
| -rw-r--r-- | drivers/usb/mtu3/mtu3_core.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c index f106fe81ae10..f8bd1d57e795 100644 --- a/drivers/usb/mtu3/mtu3_core.c +++ b/drivers/usb/mtu3/mtu3_core.c @@ -17,6 +17,7 @@ #include "mtu3.h" #include "mtu3_debug.h" +#include "mtu3_trace.h" static int ep_fifo_alloc(struct mtu3_ep *mep, u32 seg_size) { @@ -656,6 +657,8 @@ static irqreturn_t mtu3_link_isr(struct mtu3 *mtu) break; } dev_dbg(mtu->dev, "%s: %s\n", __func__, usb_speed_string(udev_speed)); + mtu3_dbg_trace(mtu->dev, "link speed %s", + usb_speed_string(udev_speed)); mtu->g.speed = udev_speed; mtu->g.ep0->maxpacket = maxpkt; @@ -678,6 +681,7 @@ static irqreturn_t mtu3_u3_ltssm_isr(struct mtu3 *mtu) ltssm &= mtu3_readl(mbase, U3D_LTSSM_INTR_ENABLE); mtu3_writel(mbase, U3D_LTSSM_INTR, ltssm); /* W1C */ dev_dbg(mtu->dev, "=== LTSSM[%x] ===\n", ltssm); + trace_mtu3_u3_ltssm_isr(ltssm); if (ltssm & (HOT_RST_INTR | WARM_RST_INTR)) mtu3_gadget_reset(mtu); @@ -708,6 +712,7 @@ static irqreturn_t mtu3_u2_common_isr(struct mtu3 *mtu) u2comm &= mtu3_readl(mbase, U3D_COMMON_USB_INTR_ENABLE); mtu3_writel(mbase, U3D_COMMON_USB_INTR, u2comm); /* W1C */ dev_dbg(mtu->dev, "=== U2COMM[%x] ===\n", u2comm); + trace_mtu3_u2_common_isr(u2comm); if (u2comm & SUSPEND_INTR) mtu3_gadget_suspend(mtu); |