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| author | Amelie Delaunay <amelie.delaunay@st.com> | 2017-01-12 16:09:44 +0100 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-01-16 11:11:17 +0200 |
| commit | ca02954ada711b08e5b0d84590a631fd63ed39f9 (patch) | |
| tree | 169f5eda24a4e53c7af7c596b1ba254f79c29654 /Documentation | |
| parent | 32856eea7bf75dfb99b955ada6e147f553a11366 (diff) | |
usb: dwc2: gadget: Fix GUSBCFG.USBTRDTIM value
USBTrdTim must be programmed to 0x5 when phy has a UTMI+ 16-bit wide
interface or 0x9 when it has a 8-bit wide interface.
GUSBCFG reset value (Value After Reset: 0x1400) sets USBTrdTim to 0x5.
In case of 8-bit UTMI+, without clearing GUSBCFG.USBTRDTIM mask, USBTrdTim
results in 0xD (0x5 | 0x9).
That's why we need to clear GUSBCFG.USBTRDTIM mask before setting USBTrdTim
value, to ensure USBTrdTim is correctly set in case of 8-bit UTMI+.
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions